FX Audio Tube-03 op amp and capacitor upgrade
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- เผยแพร่เมื่อ 25 ม.ค. 2021
- A look into op amps that are in FX Audio "stuff". Good starter op amps are OPA2134, LME4972, TL082, AD823, OP275. Those film caps are WIMA 1uF .
Check out Mike's video (Audio Arkiteks) • How to Upgrade The FX ...
He has much better production skills.
Finally ALL my questions are answered.. this video and info is godsend!!
You should see my video on the "meaning of life" haha, kidding
@@ranbymonkeys2384
That video on meaning of life wud be something!!
So finally deciding to take the plunge.. wondering whether to go all in and get Muses02 or cheap out and get the 8890D.. already running Ge5654 tubes in the tube03 mk2. looking to improve depth layering and soundstage, while keeping the warm sweet signature...
Also does it make sense to change the HP out op amp? if yes, which one..
Awaiting your reply to pull the trigger
Thanks!
@@dopydude Ive got the 8820 and the 8920 and let me help you out don't bother take that 20 and add another 30 and get the real deal you will nor be sorry. The muses 01 sucks too, compared to the 02. I really want to try the 03's but they are singles so I would need 2 and well $$$$$$$
I just found your channel watching the Audio Arkiteks channel. I am going to do the opamp and WIMA mods. Thanks for this video.
It's a must for sure, I didn't know he was going to give me credit like he did, he's great guy that's for sure. You wanna piss him o,ff get the MUSES02 op amp he's been talking about that one for a while. Any questions just drop us a line, more than happy to help.
@@ranbymonkeys2384 plug both slots with MUSES02 or mix with other OP amp?
@@mohammadasyrafmdyusoof9362 Whatever your heart desires. I have a mellower op amp for the treble (I have Klipsch speakers) and a meaty one for the bass. Mix and match to find out what sounds best for your system. Two MUSES02's will run you $100. It won't sound bad I'll tell you that much.
@@ranbymonkeys2384 damn I made wrong purchase by buying 1 MUSES03 instead of MUSES02, after read your comments on Sara only I noticed I need 2 single op amps for 1 slot, my loss T_T
I ordered together OPA2134PA for bass and OP275GPZ for treble from Mouser, is there a part number for the adapter that I can connect two MUSES03? If it's available on Mouser will order that together with 2nd MUSES03
@@mohammadasyrafmdyusoof9362 You won't be able to put the cover back on.
Great video man!!!! Just ordered some Texas Instruments OPA2134 and can’t wait to swap them in one of my units. Also purchased some Muses8920 to see the difference. Will let you know. Thanks for posting this.
Ya the 8820 and 8920 are, well, after knowing what the real ones are these are going to be comparable (maybe) worse than the OPA's you have coming.Edit : The OPA2134 is a fantastic op amp, one of my favorites. If you like that one check out LME4927.
@@ranbymonkeys2384 will do … thanks for the information.
I have around a 100 hours through this thing,new opp amps, wima caps n russian tubes,this thing is great,softens things out and adds warmth and i love the extra 6db of base as its very handy for thin sounding tracks when playing at low volume :)
hehehe
what op amp did you use?
@@danielcabrera5260 hundreds
I've changed the default and cheaply made power supply by a low noise linear power supply and it improved the SQ significantly.
Ya those power supplies that come with it are good for, well, nothing.
@@ranbymonkeys2384 Never seen an impaired OPAMP rolling before, it's interesting and thanks to you for sharing now I'm encouraged to experiment so many possibilities.
Questions: which one is the treble control OPAMP, the right one or the left one seen from the front.
I have pairs Burson V5i single OPAMP, after seeing your video I'll stack them to be Dual OPAMP with DIP-8 converter, Glad I've found you channel, , thank you.
@@cabronesse386 The right one is treble and the left one is bass, so the ones closest to the controls is what it is.
Hi, i ordered the amp and the parts (including the opamps), thanks! Just sharing something as I came across another convo which may be of interest to you: replacing the power brick for either a linear of a switch mode power brick but of better quality. I came across a couple of convos where people also mentioned using a power supply with 5a for better sound vs 24v or 36v power supply with lower amperes such as 2a or 3a.
The higher the amperage the better.
Thanks for the video post.. I upgraded to use audio caps,wima and opa2134
Sounds great. It is a beast and running without cover. The only remaining trial will be the 2 pcs of 10uf connected to your huge wima at the right video. Do you see any significant change in sq? Thanks a lot bro. Learned many things here. Will try muses or burson op amp soon as well.
What does "sq" mean?
@@ranbymonkeys2384 sq is sound quality.
@@ronnieathlon O well, tisbostycdfsq.
My bad. 2 pcs 10uf electrolytic caps (not 5uf) beside the right op amp.
I like the stock device but now im upgrading to opa2134 and GE tubes, can't wait fot the mail haha
How did the OPA2134s work out?
@@t-ballwilly2689 using the stock tubes and the 2134 somehow is a cleaner i feel extra deep bass and clean highs, but not a night and day change
First, thank you for this video, it is very informative. I've watched it many times, and have since modded 3 AIYIMA 6J1 tube preamps using your suggestions. So far my favorite set up is with OPA2134 op amps, Soviet military 6J1P-EV and/or GE5654 tubes, the WIMA caps you suggested, and a 12V/3Amp power supply. The upgrades made a huge difference, I can't wait to try other tubes, and the MUSES02 or discrete op amps that are available. Second, I was curious if you've experimented with other tube preamps. The AIYIMA 6J1 is about the same price, looks to be a very similar design, but has only two of the blue electrolytic capacitors instead of four found in the Tube 03. I need to purchase another tube preamp, so I think I'll give the Tube 03 a go and modify it like I did the AIYIMA 6J1. I'm curious to see if there is a significant sound difference with the two different boards and Tube 03's extra caps. Lastly, I think I'm ready to try building a frankenstein version like your's. Any advice for someone who's not afraid to run a soldering iron? If I had a better overhead view of your set up, I think I could figure it out pretty easily. Thanks again for the great information and for posting this video.
A lot of times the company FX Audio will have a bunch of scrap boards (mislabeled or even a flaw in the design) and they or somebody else buys them and puts crap components in it name it something else and sell them like that. I have used tube pre amps with the 12AX7 tubes (a little bigger and 9 pin) and I really like those. Youe NEED to get that MUSES02 it will blow your mind!!!! You say yours only has 2 film caps but is there room for 4? Whats your email I'll take some pics and email them to ya if you want. Get some good .1 uF film caps and solder them accross the + and - of your big power caps (usually more than 1000uF) that is called bypassing just solder them right to the existing power caps that I recommend replacing also. BIG DIFFERENCE THERE!!!! EDIT : the OPA2134 is in my top 10 op amps. Sometimes the classics are hard to let go if.
@@ranbymonkeys2384 Very interesting. I popped open the AIYIMA 6J1 case to take a look at the caps... definitely looks like it is a different board. The two caps are located right in the middle between where the tubes go. Also curious about the MUSES02 but I'm definitely more informed, it is very popular and I'm sure it's for a reason... have heard that the MUSES01and MUSES03 are fantastic as well. So many op amps to choose from, I've tried a few now... I'd love to have a peek at your top 10. Thanks!
@@akersquarteracre8002 Does it have the 2 in the center ALSO with the 4 because the tube 03 has them too. The MUSES01 isn't as good in my opinion I have both and the MUSES03 are single op amps so you would need 2 of them and put the in a dual to single adapter (in total a $100 op amp) but I heard samples online and it sound INCREDIBLE!!!!!! I'll get you pics tomorrow in some good lighting. OPA627 is a tube like sounding op amp but they are also singles those are the can type looking ones I have in the treble slot. EDIT : I found if you need more punchy bass go with AD***** op amps for mellower highs go with OPA***** The Burson V5 is a very good one also. There are several $2 -$3 op amps that I really like and sound better then expensive ones in different systems, LME4972, TL082, OP275 (reverb sounding), AD825 (single you need 2 and the adapter), AD823 ($10).
@@ranbymonkeys2384 Nope, just the 2 caps in the middle, that's it. And that's great info, didn't realize the 03 was single until now... and the 01 is not nearly as popular... so... the MUSES02 it is! The discrete op amps look like fun, but man do the get expensive. I appreciate the pics, I'll share a shot of the AIYMA with you... curious what your take is. You know way more about electronics than I'll ever pretend to lol
@@akersquarteracre8002 The MUESE01 is a dual not a single (the MUSES01 and MUSES02 are duals) The MUSES03 are singles so you need 2 to make a dual. The op amps on your board each one are duals there are actually 2 amplifiers in every chip. My take is going to be to replace them that's for sure!!! They are probably 1uF film caps but smaller my guess polyester not polypropylene (the good ones) even better polystyrene!!!
I've swapped out the original FX Tube 03's TI OPAMPS with the OPA1656 and recently changed again to a MUSES 8920D. I like both of these better than the originals and I still have the LME49720's to test. I'm interested in trying to replace the e-caps to the film caps you suggest. In order of magnitude, how would you rate the impact on sound from changing tubes, opamps, and film caps? I also replaced the wall wart with a direct power supply. Great video. Thanks.
OPA1656 only comes in surface mount so I don't know what you got there. Changing out the caps will bring a noticable result. I think the LME4972's are better than the "muses" 8920.
@@ranbymonkeys2384 I used the OPA1656 chips also in my Tube 03 and Aiyima A07 amp. There's a guy that sells them mounted on eBay: www.ebay.com/itm/333850298075?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649
check out my video where I show you how to do that
That chip has a pretty slow slew rate of 24 milivolts per second. There are a lot more superior chips than that one.
He says that those chips are made by Burr Brown and they aren't they are Texas Instrument chips. Probably FAKE like I told you NOT to get these things from EBAY. The chip is $3 the adapter is around $3 so you tell me is it fake or not? If I did them I would sell them for around $15.
Thank you for your knowledge about capacity it Is a great! Sound bro! Xxx
Great informative video!
You talk about the film capacitors but it appears you also replace the electrolytic capacitors as well can you tell us the pros and cons brands that you have used and in what position.
I have the same system too and have done some upgrades that you have already shared in this program with the film capacitors and with the IC chips.
I was planning on replacing electrolytic capacitors in the signal path with Elna RFS series Silmic ll or Panasonic FC series.
It's a nice little preamp system I think for the price driving my Leach Amp and Thiel Speakers.
Any further information would be Greatly Appreciated!!
Thanks in advance.
Ya those elctrolytic's need replaced. I like audio grade Nichicon but to each their own. I replaced the 10uF caps that are pushing the op amps with the (10) big 1 uF film caps so that's a huge step.
@@ranbymonkeys2384 Muse I agree 👍🏻
Now time to order parts.
Thanks so much for the terrific video. I've been using several of these units with pretty good results, only replacing the tubes. (RCA 6ak5, and Philips EF-95 (Holland) are my personal favorites)
I've got another one of these and I've decided to do the complete upgrade with Muses02, and replacing caps.
I've ordered the two Muses02 opamps and four MKP4250 to replace the four blue square caps.
I'm having difficulty locating appropriate caps for the other caps in the unit. (closing the case not critical. I will build a custom case after this upgrade is completed.)
As I see it, I need: (Based on the ones I removed)
4- 22uf 250 V
4- 100uf 25V
2- 10uf 50V
1- 1000uf 16v
Is this correct? Hope this isn't a dumb question.
This is based on the caps I removed from the unit, but unsure about the 3 by the power plug. (Is the one closest to the back of the unit the 1000uf, and the others two of the 22uf?)
I've found plenty, but only ones with wires on each end, not with both wires on one side. If it's not too much trouble, could you give links to the ones you used for the remainng 11 caps in this upgrade, (and perhaps confirm the quantity for each)
Thanks so much for your time and consideration.
Regards,
Frank`
What happened to the ones you removed? Going by memory I believe there is only 1 1000 uf and 2 22 uf. There are also two little 1 uf film caps in between the tubes also. Where did you get the Muses02 just wondering why you are having a hard time finding these caps.
@@ranbymonkeys2384 Thanks for the reply. I ordered the Muses02 from Mouser.
Are the 1 uf between the tubes the small square blue ones? Mine have no markings on them.
Thanks.
@@fjdds1 They are, and they should. Why are you having trouble finding those caps Mouser should have them for sure.
Thanks! I'm just having trouble since there are tons of options on Mouser. Unsure which will fit on the board. Do you by any chance have a list of all the capacitors from Mouser(or Digikey) that you replaced. (Already ordered the Opamps and the WIMA 1UF, but I'm quite confused about the others.
If you can't, no worries. Thanks anyway.
Regards,
Frank
I really wish someone.....cough monkey cough..... could list the values. Mine are unmarked also, sigh....
Great video, which op amps do you think are the best for the fx audio tube 03 the Opa 627, OPA 2134 or the Muses 02? And which ones for the Aiyima A07? Thanks.
Same
Hi, Could you suggest some good caps for the rest of the PCB? I see that you have replaced all of them. I am interested to upgrade the power supply portion as well, cos those default caps are getting really hot.
With electrolytic caps I always go with audio grade Nichicon just always pay attention to the physical size of them before you order
Looks like it’s time for an OP amp video in my near future
It's about time a professional did one, haha (I'm referring to you not myself)
@@ranbymonkeys2384 i got three of the four front TIGHT screws out and then ended up frickin stripping the fourth. Now i am trying to learn how to get out that small rounded hex screw. May have to loctite it in place with the small hex key and lose the bolt and hex key. Heck...don't even know if that will work. They definitely over tightened my unit. The first one was tight but at least i got them out. Upsetting as i was going to put the Muses02's in but this all has to sit now. First world problem.
@@RUMBLEGO1 they are allen screws how did you strip them?
@@RUMBLEGO1 you just need the top 2 front and top 2 back
@@RUMBLEGO1 MAKE SURE YOU PUT THAT OP AMP IN THE CORRECT WAY!!!!
Thanks to your advice I replaced the bass op amp with AD823 and the highs with MUSES02 and it sounds fantastic so thank you, but know I want to replace the capacitors with some WIMA ones, do you by any chance have the serial number of the ones that are compatible?. I ordered some from mouser but ended up being to big
Switch them (flip flop) to see if it's better, you never know until you try it.
www.mouser.com/ProductDetail/WIMA/MKS4F041005B00JSSD?qs=NW4srbNA5mc7JzReSZM39A%3D%3D I know the picture says .47 but it's just for illustration. Look at the specs below it.
what ones did you order because the board is made to take .5 long to 1 inch long if you look at the board there is 4 solder holes for the + and 4 holes for the - so when they assemble them they can use bigger or smaller ones what you have will work I'm sure
They are an inch long but they are 1.5 inches tall so they don't fit in the case
@@jorgeruiz8579 ahhh, ok, i put the link of the ones that will fit for ya
Hi! Cool video. Quick question please : I think it is possible to replace caps with caps of high voltage value but what about the uf? (capacitance?). In short: do you need to replace a 1uf cap with another 1uf cap or can you use 2uf, 3uf etc instead? If so, what can you expect in terms of audio output and quality? Thank you
The microfered (uF) needs to stay the same but the voltage can be hihger so if there is a 20v cap you can replace with a 9,000v cap.
Why don't you replace those 4 1uF caps can find out. Those are good beginner ones to replace too, lots of room to fuck up.
@@ranbymonkeys2384 thanks for the quick reply! I can get that BNIB fx audio preamp for 30 usd so no harm trying new capacitors! Have you also done the caps modifications to amplifiers too? (such as the aiyama a07 which is quite popular).
@@ranbymonkeys2384 agree, i will start with those. And they are available in my neck of the woods too 😊.
@@ranbymonkeys2384 by the way, why not replace the other caps? (the round ones that are blue and brown). Is the voltage 250v for the 10uf please? (perhaps nichicon may be easier to fit in that the film caps :) )
I have a Aiyima T7 tube preamp. I've replaced the tubes with Sylvanias from the early 50's. It has three NE5532P op amp chips on the circuit board. What would be good upgrade options for these chips?
Ya that is the newer one with bluetooth. One op amp is for bass another treble and the third is the headphone amp. Any "dual" op amp will work in the description are a few good ones to get started.
Another option is that you can also take the opamps out completely .. and it just runs on the tube circuit! Which having tried different opamps I prefer
but it means you loose the volume and tone control functions...so you will need to have a volume on your streamer, source or integrated/power amp to adjust the volume.
you do that, hahaha
Take a video of that for us would ya??
@@humanitech OK the input comes in from RCA's then to the volume control then the treble op amp then the bass op amp. Not skeptical at all give us that video.
You know what, you're right, I was thinking about when a guy was saying you could take the tubes out and it would work, not op amps. I stand corrected, where's the crow.
@@ranbymonkeys2384 No probs...it is very clever how they have designed this circuit... and I only found out by accident, when playing with opamps and I left one out by mistake, and plugged it in and it still worked!? So I then played and swapped them around having just the tone, then just the volume and it sounded better. So I then took them both out (and with some nice but cheap voskhod tubes) it sounded very pure and sweet and just what I wanted.
So really it is just another interesting option to try ... As I think without the opamps... it maybe a similar circuit to the FX audio 01 - Which has also got a good following with the modders too!
But the interesting thing is... the gain now seems to be set in the perfect sweet spot too!?. So I adjust the volume from my blue sound node 2i and it works great without any distortion issues a higher volumes levels.
I see you recommend the MKP4 's , but MKS4's are shown in your video. Will both work in this circuit , or is one better then the other ?
yes and yes there was a time I recommended AOL also
Which caps you prefer?
I have 0 chance of getting that DAC, modify, etc. Could you please upload a video showing the DAC sound after the upgrade?. Yes, yes, i know that you need to listen it in person but... will not be possible. I will really appreciate if you can do sound test for your mods/upgrades, playing any song of your preference.
What power supply/adapter do you use ? I read it will also help for better sound than stock adapter. Is Linear power supply any good, lm317 psu toroid with hi grade audio parts like wima mkp10 (top series of WIMA Cap), elco gold series, elco silmic II, diode fast recovery. noise filter, heatsink anodized, etc.
junk
@@ranbymonkeys2384 you mean psu doesn't matter ?
@@T1k3mys0n Of course it does. EDIT: MKP10's aren't WIMA's top series.
They take the same power supply but the higher amp supply the better like a 12 volt 10 amp
@@ranbymonkeys2384 Thanks for confirming. I just got similar answer just now from the seller that's why I deleted my comment.
It has treble and bass using same opamps, can a MID be added too ? Mid is also good to have in a pre amp/tone control but mostly doesn't have it unless using a DIY preamp/tone control kit.
Ya you can, but that's all you!!
Look at the AD827AQ it's the same but ceramic.
Anyone got any tips on how you managed to desolder the stock caps off that board?. I've tried a duratool solder sucker and any decent amount of heat starts killing the cheap solder mask :(.
whats solder mask? Put some solder on the joints and gentley pull the caps off rocking them back and forth while applying heat from the soldering iron. Then worry about getting the solder out of the holes.
The UK runs on 230 volts, and I have stock caps fitted in my UK model Tube-03 saying 'H04 105k 450v' so have you any idea if those same Wima caps you show would work as like-for-like replacements in my own? Thanks from a newbie.
They are the same that is in ours too that just means the cap can withstand 450 volts before blowing up and tubes generate far more than your mains does.
@@ranbymonkeys2384 Thanks for the clarification.
can i replace the cap with wima mkp10 1uf 400v ?
what is the green capacitor ? muse BP 100uf 25v ?
I just gotta ask…….. Muses02 or Sparkos?
I realize I do like the dual OPA627s in 1 of the slots, thank you .
Muses02 my SParkos is in a box somewhere
Even better yet, ask santa for a couple muses03's and let me know how they are I bet they sound pretty good.
I finally received the caps from mouser and I got around to opening my preamp! Surprise... The blue caps are 450v / 105k (~1uf I assume)! Fx audio must have reworked the circuit since your video (mine is 2021-08-12). I guess I have a bunch of wima caps on standby for other projects then ;) how did you know you needed to change the 2 10uf by the way please? (as there are other caps on the board). Thanks!
105k is 1uF
@@ranbymonkeys2384 yes. But the caps are rated at 450V, not 250V
Thats a good starter project you can't screw it up its impossible. EDIT: you should listen to it before and then after.
well?
Thanks for all that great info. I bought everything that you've suggested. So far I only have the OP amps Right now I have the OPA2134s in atm, I tried them all though in the description. Those sound amazing. the LME4972s where the first ones I tried those sound way better then the stock ones the pre amp came with and as the price went up so did the sound quality of the Op Amps. I really like the highs from the LME4972s and the bass from the OPA2134s. Thanks for the info. Can the 2 tiny blue caps be replaced by red ones of the same brand as the Red ones?
Ya the LME4972 is truly a classic. You should try the MUSES01 or 02 they will just blow your mind. Yes those little blue ones are also 1 uF and WIMA makes a 1 uF film cap the same size you just need to learn how to use the search features that Digikey or Mouser has on their website. Remember to try flip flopping those op amps they may sound better with the 2134's for the high's and vise versa. Ya never know.
Did you do the four bigger 1 uF caps yet? P.S I met Hickok45 at a gun rally over here in Nashville a few years back.
@@ranbymonkeys2384 Whaaat you met Hickock45?! Luuucky. I wish I could meet all the Guntubers. They all seem like really great people to talk to. The Muse01 and 02 I was looking at those as well. those are on my list to get next. As for the smaller blue ones I ordered these to replace them WIMA / MKS4F041005B00MSSD then I ordered 4 of these WIMA / MKS0B041000F00MSSD Which are the larger ones. Both of those items are on the way. Should be here soon then ill swap those all out at the same time. I just switched one of the OPA2134s out for an LME4972. Sounds great ill try switching them around. At the moment i got the OPA2134 as the bass and LME4972 as the treble, but ill try them the other way around, So glad I found your channel.
@@vincentnunez6569 Replacing those caps make a bigger difference (believe it or not) than swapping the op amps. It will extend your sound stage 30 feet more in front of you and 15 feet on both sides it will appear the sound is coming from. Now those caps have a "break in" period and you will hear it. I thought I screwed something up when I did it, but be patient and you will hear them get better and better. Anyone that says there isn't a burn in period with components have never replaced their own. Youll see.
If you ever replace caps on something that you don't mind not having the cover on (or if you can find the room), you got PET caps you should try the PP caps they are polypropylene film caps. They are bigger and more expensive for the same uF but o boy do they sound good. In the search on those websites look for PP and search for them, WIMA makes them too.
@RanByMonkeys do you have a Digikey or Mouser part number for the giant 1uf caps you've used to replace the stock film caps? I can't seem to find them. And do you know if they come in 2.2uf? I'm using 2.2uf and I like what it does in my set up, and I'm curious if the physical size of the cap has any perceptible effect.
Here is the link to Every in stock polypropylene WIMA film cap. I like to have people learn how to use the websites instead of me just tossing them a part number. The teach a man to fish thing. www.digikey.com/en/products/filter/film-capacitors/62?s=N4IgjCBcoJwAwyqAxlAZgQwDYGcCmANCAPZQDaIAzABzUDslAbCALpEAOALlCAMqcAnAJYA7AOYgAvkQC0EaCFSRMuQiXLgYAJmqtpIGVqSKoggK5rSkCgFY9%2Bo9cUZ2GZEM7EBOPUA
The material the cap is made of will make the difference and the size is determined by the material, so, ya.
@@ranbymonkeys2384 Seems there is just one 1uF option. Did the 27.5mm lead spacing cause an issue or did you wire them in? The spacing on my SUKA version is 22.5mm
You need to worry about the thickness because if you look at the one I did only 3 fit and I had to put the 4th underneath. I'm confused about what you want to do. You mentioned the big caps those are PP polypropylene. If you want the same size as stock your want PE film caps they are smaller not as good sounding and cheaper. What are you trying to do?
@@davidnoble868 The art number to replace the stock with the same size is mentioned SEVERAL times below.
I'm desisting to order my opamps from Aliexpress. I'm going to order it from mouser, there are a lot of things out of stock. This are the options available LM4562NA, NE5534P, LME49720NA do you recomend any of this? And the WIMA caps also out of stock, any alternatives? Thanks for reading. EDIT: I found this in digikey FKP4G041006J00JSSD is it good?
LM4562 is good so is the LME4970 Like I have in the description. NE5534 won't work it's a single op amp and mouser has a shit load of WIMA caps.
www.mouser.com/c/passive-components/capacitors/film-capacitors/?capacitance=1%20uF&m=WIMA&instock=y
@@ranbymonkeys2384 There are with 5% tolerance and 63V o 10% tolerance and 250V wich one is better, less tolerance or high voltage? There is not 250V and 5%.
I just opened my new FX Tube-03 and though I can get the muses in I have 500v and not the 250v ones (want to replace with the wima's. Any advice for me?
Thought you can get the muses in? I already answered the 500volt vs 250 volt question, PAY ATTENTION!! What are you talking about "thought I can get the muses in"?
@@ranbymonkeys2384 'nough said.
when i search for OPA2134 op amps i get 2 result one is from Texas Instruments and another is from Burr Brown, which ones to get?
I guess they are both owned by the same people, where are you getting them from?
hi, which ones are the capacitors on the power supply, the one which says 22if 250v. Appreciate the response.😀
There is no power supply.
Anyone know if with the capacitor upgrades, tube upgrades and op amp upgrades this can best a Schiit Saga+?
I do not have a schitt Saga but I am now interested in that product and I’d like to find out for myself.
So if the tubes to this amp operate at 250 volts and the capacitors that you used operate at 250 volts how are they doing anyting if it has a low voltage power supply?
Because film caps usually don't come in lower voltages. They do but they are very small for the size of capacitance desired. You can have a 10,000,000,000 volt cap and it wan't make a difference. EDIT: The answer is the tubes don't operate at 250 volts.
Voltage multiplier - Google them…
Hey, nice video. Have you tried using bigger capacitance film caps at the output? Some guy measured the distortion in the tube 01 after going from 1uf to 4.7uf and the result is pretty good. I'm planning to try that in a tube 03 variant from Aiyima, eventually, but was curious if someone did; my goal with the preamp is to make it as accurate as possible, not interested in tube sound, I only want to use the tone controls to complement my analog eq.
No because WIMA does a real good job at holding the juice and I spent $5 a piece for those film caps, haha. If you have an EQ you probably won't need tone controls. The less components the better.
@@ranbymonkeys2384 yeah I agree but I want to give the little guy some use, lol. That purchase was kind of a mistake, but hey it's dirt cheap couldn't resist. The preamp was actually out of my chain because I found it to sound awful, made voices sound kind of robotic, but recently I came across a power supply from an old display rated at 12v and 3.3amp and no more robotic voices, guess there is potential.
@@Masked4789 To quote the late great Bob Ross "we don't make mistakes, just happy little accidents". But you would want a component that just has the tone controls. There out there. I think Schiit makes one that people say is pretty good. You know the "people". What EQ do you have, you shouldn't need any more tone controls.
@@ranbymonkeys2384 I mean, I don't regret it haha. I have an old 7 band Fisher Eq, it was from my father. It's pretty nice, has a little display that shows the current level of each band so it helps when Eqing.
I'm now thinking about using the preamp in my headphone system, my modded T40RP mk3 could use more gain, won't be using the tone controls tho, but for that I believe I have to mod it to work properly with my low input impedance head amp, have any advice for that?
@@Masked4789 I have to tell ya I'm not a headphone guy so I can't help you there, but, do you have the tube-01? I had that but I sold it and it's WAY better than the tube-03 I wish I still had it.
Thanks for the video, I'm getting the MUSES8920 from Profusion Audio Semiconductors - the official UK distributor. To desolder the existing film caps, any tips for the soldering iron, solder etc...
Ya the 8920 suck just as much if get them from ebay or your "official" distributor.
As far a tips it sounds like your green as the driven snow. No, not really.
@@ranbymonkeys2384 so which of the MUSES02 or the Burson V5i D?
@@ranbymonkeys2384 Very true, I'll probably just get a local electronic repair shop to change the capacitors out...
@@daysofgrace2934 D?
Obrigado por compartilhar seus conhecimentos. Comprei um FX Audio Tube 3 e tenho um par de LM4562 originais para substituição. Pode por gentileza me orientar quais modificações indica para que o Tube 3 continue com a tampa? Qual a mudança mais perceptível, as válvulas GE Jan 5654W ou os capacitores? Estou comprando as válvulas e capacitores de vendedores no Ali Express, a importação dos EUA tem a taxação muito mais alta. Encontrei um vendedor do capacitor na china com estas medidas: 26.5x7x16.5mm, são as mesmas medidas dos capacitores WIMA MKP4 1uF/250V que usou no lugar dos capacitores originais do FX Audio Tube 3? Agradeço antecipadamente a ajuda.
huh
You are replacing fake stuff with more fake stuff. Where did you get our "original" LM4562? I'll bet it's fake too, it seems to be the most faked chip out there.
@@dacampli1251 What's "it"?
@RanByMonkeys Foi comprado na Mouser EUA. Comprei um pré amplificador DIY que o fabricante compra os componentes na Mouser. Esses são os únicos cis que tenho, pois não estou mais usando a placa do pré amplificador. A minha dúvida é se os itens vendidos na Ali Express como as válvulas GE Jan 5654W e os capacitores Wima 1uF/250 são 100% falsos, se for o caso terei de ver uma forma de receber esses itens de alguém que os envie dos EUA, mas infelizmente não conheço ninguem que possa envia-los. Agradeço a atenção.
@@dacampli1251 Order them from Mouser in the UK.
how do you hook up the phono snd the amplifer ground to the fx preamp? There is no ground lug to do this
Well it's not a phono preamp.
I internally ground my turntables anyway, I've never had a humm or buzz doing it that way. You are looking for something like this www.amazon.com/gp/slredirect/picassoRedirect.html/ref=pa_sp_atf_aps_sr_pg1_1?ie=UTF8&adId=A0864514F93PXTNPM39A&url=%2FDouk-Audio-Preamp-Stereo-Preamplifier%2Fdp%2FB07XDGYQW1%2Fref%3Dsr_1_2_sspa%3Fdchild%3D1%26keywords%3Dfx%2Baudio%2Bphono%2Bpreamp%26qid%3D1625273896%26sr%3D8-2-spons%26psc%3D1&qualifier=1625273896&id=3784325915346660&widgetName=sp_atf
Funny, I can't find the big ones on mouser/digikey. Would you happen to have a reference I could use to find the big 1uf 250v please? (I found the smaller Wima). Thank you
the ones that i have grouped in 10?
there are several big 1 uF caps there
you didn't really look did you www.digikey.com/en/products/detail/wima/FKP4G041006J00JSSD/9370277
@@ranbymonkeys2384 I actually did and the big ones were not picked up (only the smaller ones). Possibly because I am not in the US. Thanks for taking time to help out. Much appreciated! Have a good day ahead.
I bought OPA2132 for replacement and Oracle II 2. Soviet 6J38P-EV lamps. The capacitors will also be replaced, I will put WIMA.
Еven the lamp beds need to be replaced with ceramic ones.
oracle ll ? lamps?
do you need matched tubes on this device or will 2 same brand/model suffice on this?
you don't "need" matching tubes but you will have a different sound on the left and the right. That's why people pay extra to have them matched as close as possible.
@@ranbymonkeys2384 cheers mate, think I'll treat myself to one of these & try the 2 basic mods. Seems like an inexpensive way to give an old amp a new sound.
@@bigambientdeath Now electrolytic caps only last about 20 - 30 years so you may want to look into replacing the big power caps (usually 2 o f them) in your old amp.
Make you music more hifi!, My Suca tube T1 has arrived!, It comes with 6k4 tubes & NE5532p op amps, sounds good out of the box, swapped in opa2134pa amp's, sounds a bit more spacious in the top end, will leave Russian tubes till the others are properly run in, good unit so far...
@@bigambientdeath It probably came with Chinese tubes, if it did, get them the hell out of there, haha.
Can you show also how to bypass tone controls on these? Or is it even worth it??
Try to find a Tube-01, that is the same thing just with no tone controls and no op amps.
@@ranbymonkeys2384 yes gonna try that.
so if i aint wrong the fx audio is pre amp so what happens if i put a different op amp into the fx audio and connect to an amplifier that uses another op amp. What happens then. does the op amp on the pre amp become useless since the main output to the headphone is from the amp or the combination will mix up the sound from both op amps?
huh?
An op amp in one piece of equipment has nothing to do with an op amp in another piece or equipment. Usually almost always the headphone amp has it's own separate op amp. When the main out put is used the signal isnt going through the headphone port anymore so the headphone op amp isnt being used.
@@ranbymonkeys2384 im pretty new to this so i am not quite sure how it works
@@ranbymonkeys2384 so meaning if i use a pre amp to amp set up, only the op amp in the pre amp is used?
Can I put 2 single Burr Brown OPA620 SG ceramic/gold in a dual adaptor for audio amplification?
What is ceramic and gold WHERE ARE YOU GETTING THEM, why the hell doesn't anybody listen to me. If you don't pay at least $50 each, they are fake!!!!!!!
They don't even make a opa620 you are looking for AD620
@@ranbymonkeys2384 they are old burrbrown mono op amps used for medical and video equipment www.digchip.com/datasheets/parts/datasheet/477/OPA620-pdf.php
@@necrodh You will have to check the voltage at the input pins it's saying it can only withstand +/- 5 volts. It appears to be a unstable op amp, but hey it's not permanent.
Great video! The NE5532s that came in my Tube-03 were fake. You can tell by measuring between pins 3 and 4. If they are mising the internal protection diodes, they are fake crap. Probably a ten cent dual 741 marked as a NE5532. The 10uf electtolytics were labled as Elna but those are probably fake also. So yeah, replace the op amps, elecrolytics with film caps, film caps, tubes, and then it should be ok.
Hahaha
Great Video !!, I just got the Fosi Audio tube P1 preamp I bought in addition the Riverstone 5645 GE tubes , I still listening now to the 6K4 tubes, What OPAMP you can suggest me to be replaced in my Fosi P1 ?
Look up there ^^^^^^^^^^
@@ranbymonkeys2384 OK, I will order the OPA2134 and four WIMA 1uF cap. Thanks
@@ranbymonkeys2384 Hi, Can you please provide the WIMA Caps values or links form digi key, sorry I got lost from all the list of caps in the website. Thanks
@@RanTausi That isn't all you need, you don't know what the hell you are doing so your asking for me to make sure you don't fuck up. THE ANSWER TO YOUR QUESTION IS IN YOUR PRE AMP RIGHT NOW.
@@RanTausi Look up capacitors (film) then look up WIMA if that's what you want and click on it then click apply to all now it will just show you WIMA caps. Then you can select uF, voltage, and if you are really confused hint: check out the SIZE. Look I have no problem helping people out, I do however don't want to hand people everything because then what happens the next time they need a ANYTHING it's "can you give me a part number" Also check the box that says "in stock" under stocking options.
Will the Bursons and opa fit inside the case without the extention? (can i install them with the use of height extensions?) Is there a way to keep the case on?
nothing will fit with the extension the Burson V5i will fit but not the V5.
The only reason you would use and extension (that makes it taller so I don't know why you thought that that would be good for putting the case back on) is for single to dual adapters to clear the caps on the left and right side of the op amp because those are long not tall. The Burson V5 is 2 inches tall!! Any op amp besides the V6 and the V5 and anything you NEED to use and extension with will fit.
@@ranbymonkeys2384 Thank you so much for your response! Since discrete opamps wont fit inside the case anyways, why not go all the way. Was wondering if the Burson V6 vivid or the Staccato OSH or the Sparkos Labs SS3602 will fit into these pins? If yes, then which combination would you recommend? (Sorry I'm new to Amp rolling and didn't even know it was thing before watching your video. I understand technology but I'm not a circuit guy)
@@Thoughtflux The V6 is the same size as the V5 so no, and again the V5i is a discrete and WILL fit. The Sparkos has a large footprint and needs the spacer. All will fit but you have to have your cover so your options are limited.
@@Thoughtflux If you can talk yourself out of the cover you can have whatever your little heart desires in there. I have even cut the case in half so it has the bottom and not the top. The pins aren't the issue its room vertical (for the Burson V5 and V5) and Horizontal (for the Sparkos)
Hello Clay, you can also pull out all the (two op-amps) and just use it as tube buffer. Obviously you will by-pass the tone & volume controls as you have broken that part of the circuit. You can always use something like Equaliser APO (Windows parametric equaliser) and the volume control on your PC/iPhone and amp. This way you just get Tube Sounds, different tubes different sound signatures. At first I was dubious about this but after a fair bit of listening I'm a convert. The guy who told me to try it, I thought he's a wrong'un but there is method to his madness. Trust me Clay, give it a shot. You can even have an op-amp for just the tone controls. I have a Burson V6 Classic (dual config) for the tone controls at the moment but this will be gone too. My Sundara headphones are a bit bass light in the lower bass frequencies and I use an iPhone with Amazon HD Music (music stored locally), Apple Photo USB3 convertor into an E1DA 9038d USB-C DAC so no parametric EQ. I'm moving on my Muses02 and investing in different tubes, I've got some GE & Mullards; I'm keen on getting some of those NOS Sylvanias as you mentioned. One thing I would say is up the input and output coupling capacitors from 1uF to 4.7uF each; I read this farmedia.com/tube-audio-line-level-buffers/, this allows the full bass frequencies to come in and go out from the pre-amp rather than filtering them from entering and exiting the pre-amp. Thanks a lot for your help...
I don't have time for novels and for the first two sentences, I know.
For OP Amps that drop in without Any modifications and Sound pretty Nice, I have a Muses01, Sounds pretty Nice for an IC 2Channel one.
yes it does EDIT: I think the MUSES02 is a bit better
where did you get your muses chip?
@@ranbymonkeys2384 in a local Electronics Shop, small Business WHO had a few left, but they don't have them in Stock anymore.Not the Cheapest AMP, but it Sounds very balanced to me.
@@johanneshainer3460 Those are faked all of the time, it's a weird op amp to keep around because they are $50 a piece.
@@ranbymonkeys2384 I Know but i checked with acetone and a magnifying Glass, seems legit.
Could someone list the number of caps needed and the values for the 03? Ones that will fit with the lid on. 🙏
So far, and please correct if wrong.
4x 1uf 250v to replace blue square caps.
2x 10uf 250v to replace the cylinder opamp caps.
?
Thanks
how about you look at the caps and see what is written on them
I was making a bulk cap order and didn't want to open it up until I got my order....I did anyway, just thought someone could save me and others some time, is all.
Did you ever use the muse 01? If so, how did it compare to the 02? I'm reading some mixed reviews. And 50$ a pop is not allowing me to experiment.
Thanks for making this video. I appreciate it and you for doing it.
Perhaps you can give some insight. I ordered 10x volkshod rockets, and glad I did. Some were clearly better sounding than the others. I seen a review where someone said the brighter they glow, the better they sound. I found this to be true. Is there a good way to tell? Other than buying a tester? Should I bulk order others? Say the Sylvania 6ak5s. Or should I just buy them pre matched and tested?
Really new to the whole tube, opamp rolling. I am enjoying the journey though. Thanks
How about replacing the cheap power supply it comes with?
Well ya
Can this be used audio jade ad825 to replace the stock op amp?
What is "Audio Jade"? The AD825 is made by a company called Analog Device and the AD825 is a single op amp so you need 2 of them to replace one of the stock ones.
@@ranbymonkeys2384 ok thanks a lot
@@efrenreyesarchive look at AD8620 and what is Audio Jade?
OK Jade Audio, ear buds, not my wheelhouse. I know nothing about headphones.
@@efrenreyesarchive does your turntable have a built in pre amp most do.
Hi, i've been following the comments with the greatest enthusiasm hoping someone would put the WIMA capacitors reference in the comments. In Portugal both Mauser and DIGI-key have weird stocks and references a little different.
Could someone make available more detailed specifications of WIMA or the references of Mauser and DIGI-Key... ones that dont blow up my amp?!?!
Thanks
Well, there are several different WIMA caps in this video. What value (uF) are you looking for? Are you replacing a stock capacitor? Is size an issue (does the cover have to go back on)? Replacing caps won't blow your amp up, not knowing what your doing will. I suggest you contact your local audio engineer before you get into something like this?!?!?!
@@ranbymonkeys2384 Yes, I am replacing the originals, supposedly the lid should go back to the original place being that the measurements should be... identical or at least allow the lid to close on.
The question here is about tolerances. I found this reference without knowing very well if it would match the red capacitor you show on the table next to the blue ones (probably the stock ones).
MKS4F041005B00MSSD
Am I really that far off?
@@rnclucas OK I think I may know what you are trying to do. You JUST want to replace the 4 blue sometimes yellow Chinese film caps then those are what you want. While your at it, why not replace the other 2 film caps in the center of the board (note they are smaller but the same value). The values are all written on the capacitors so if you replace with the same value it wont do any harm. That being said, those will work BUT I DO NOT RECOMMEND THAT YOU REPLACE THEM!!!!!!! You may as you say BLOW YOUR AMP UP because you DON"T KNOW WHAT THE HELL YOUR DOING!!! So to REITERATE the advice I'm giving you is leave it alone so you can't blame me for doing damage to your stuff, I hope I'm not unclear.
@@ranbymonkeys2384 tks for the advice. Probably better not to mess with radioactive or nuclear stuff. 😁👍
@@rnclucas Your owners (the EU) see it differently. That's what happens when you sell your soul. You loose all freedoms.
Ooops! I installed a set of OPA627’s backwards in my tube 03 and turned it on. The OP amps are ok but the tube 03 is distorted with no volume control, bass control and treble control.
I think it's the op amps they are what we called FRIED! Swap them out with the other ones and see if it fixes it.
I put the OPA627s in a different Tube 03 and they worked fine.
@@audio-obvious568 It's impossible for the op amps to destroy the Tube-03 themselves. Again try to put different op amps in the Tube-03 that you say has all of the problems.
@@audio-obvious568 What are you using for an adapter with them?
@@audio-obvious568 take a picture of those op amps and send them to me at peopleridiots101@gmail.com
Hi, can I change 4 biger caps with this capacitors WIMA MKP 10 Polypropylene Capacitor 27,5mm 250V 2.2µF. And two small ones with WIMA MKS2 Polyester Capacitor 5mm 100V 2.2µF. Tnx
Do you have a chainsaw?
@@ranbymonkeys2384? Why
@@ranbymonkeys2384 www.audiophonics.fr/en/wima-polyester-capacitors/wima-mkp-10-polypropylene-capacitor-275mm-250v-22f-p-13629.html and this www.audiophonics.fr/en/wima-polyester-capacitors/wima-mkp-10-polypropylene-capacitor-275mm-250v-22f-p-13629.html
I am not so good with electonics but know how to solder 😁
@@kristijankusic1374 I guess I don't understand the question, you know how to solder and you would desolder the old and sodler in the new, or am I missing something?
So basically what you're saying is that without swapping out all the components, it isn't worth buying one of these?
Nope, I never said anything remotely like that. I'm saying that a WIMA cap is better in every possible way except price than a Chinese cap.
My tube 03 has 500v caps should i change them for 250v or 500v wimas?
what caps are you referring to?
take a picture and send it to me ch3151980@gmail.com
Hello I'm also curious about this as well, my tube 03 also has blue 500v caps. but the wimas you show in the video are 250v. What should i do?
@@raymondlopez515 Weird.
@@raymondlopez515 More times than not the Chinese throw whatever that have at the time in there. The 230 volt will work fine.
Can the MUSE01's be used in this unit? I hope so or i made a mistake in ordering them instead of the MUSE02's. Ordered them from Mouser so they shouldn't be counterfeit at least. Thnx!
It will work, but I found the 02 sounds better. It's 100X better than what came in it.
@@ranbymonkeys2384 Thanks so much RBM. Another person did a shootout with the 01,02,03 and another one of Muse's. Listening through my system i enjoyed the 01 better. Either way i am sure it will be an upgrade and just really glad it will work in my unit. Thanks again!
@@RUMBLEGO1 It would be a shame to have the MUSES01 in the DAC and the MUSES02 in the Amp wouldn't it, haha.
@@ranbymonkeys2384 Haha! I'm using an Ifi Nano Dac. Do you think the Muse's would be an upgrade in their as well? Either way i def will start with putting the 01's in the tube buffer preamp and see where i am at. Actually my system sounds pretty good already but wanted to see what this op amp upgrade could possibly bring to the party. :)
@@RUMBLEGO1 Hell yes open it up and see if it has a easily removable, it may have a surface mount. I would put the MUSES01 in the DAC until you can get ones to replace the Tube01 , wait the tube-01 doesn't have an op amp. EDIT: wait nevermind did you get 2 of the MUSES01's?
Hey!
Mouser and digikey aren’t stocking through hole mount OPA627s!
so get the surface mount and solder it onto the thruhole adapter
Ah ha!
Never thought about that!
Thanks!
holy shit!! 50€ plus shipping costs (20€) for a MUSES02 operational amplifier. I have to look up information to see what it does.
Is sounds awesome that's what it does.
@@ranbymonkeys2384 Can the MUSE01's be used in this unit? I hope so or i made a mistake in ordering them instead of the MUSE02's. Ordered them from Mouser so they shouldn't be counterfeit at least. Thnx!
@@paulb4661 I rarely use specs just for that reason. Congratulations on job well done. EDIT: Have you played it a while because there is burn in that is going to take place it just gets better.
@@paulb4661 OK when was it delivered (Just wanted to know how many hour you had the MUSES in that's all)? Nichicon 3 uF seems a bit low for power filter caps. What MOSFETS are your referring? The TUBE 03 isn't a class A amp. What DAC are you referring to? Why would you have had an issue after just swapping out the op amps you say checking the pads and these op amps are through hole not surface mount. Can I ask you something, did you take the shot?
@@paulb4661 OK I was wondering why you would replace a CD player op amp, but it's the DAC portion. What sample and bit rate is that gettin' ya? I don't know, the Burson V5 isn't bad.
Does anyone have a recommendation for what OP to replace stock with?
There may or may not be a couple of them in the description, maybe. Shhh, don't tell.
What is your system lacking? What does it need more or less of (tighter bass, lower bass, crisper highs. mellower highs, ect) ? EDIT: Sara the reason I ask is because different op amps can do different things such as OPA627 will soften the highs with a warmer tube sound, I'll tell you what, get a MUSES01 and a MUSES02 from Mouser NOT EBAY and you won't regret it. link to 01 : www.mouser.com/ProductDetail/NJR/MUSES01?qs=%2Fha2pyFaduhLj53VmnKEqFRFz215J7cixEDbz0teI2s%3D
link to 02 : www.mouser.com/ProductDetail/NJR/MUSES02?qs=%2Fha2pyFaduiBH%2F%2FkpIrdkJVU%252B1ReE4c5hUkfZAV1m%2Fo%3D
LOL! Should have introduced myself , This is her husband Frank.
Got it! Thank you! I know I heard the parts in the video but wasn’t completely sure which ones and I’m looking to tame the highs a bit. Due to the crossovers I went with in my cerwin vegas.
@@t-ballwilly2689 The opa627 does a real good job with taming the highs, but those are single op amps so you would need 2 of them just for one "slot". For a cheaper option the OP275 and the TL082 would be good for taming the highs. Get 2 of each the OP275 is around 4.50 and the TL082 is about 1.50.
@@t-ballwilly2689 Grab a AD823 for around $10 too for your bass op amp. Youll have enough to mix and mach then. Later get those MUSES, but those would be KILLER!!!!!
is the green capacitor are muse ?
No
Muses are only the op amps
estimado amigo gracias por el video que has publicado tengo un tube04 y me gustaria poder modificarlo como indicas, imagino que el sonido ganara en belleza y fidelidad, me gustaria por favor si es posible lestado de materiales y esquema de montaje, agradeciendo tu atencion te saluda atentamente desde sevilla españa francisco sanchez
no hablo
Fransisco Lo más básico que puede hacer es reemplazar el amplificador operacional y no hay ninguna soldadura. Desea buscar amplificadores operacionales de "orificio pasante" y no de "montaje en superficie" y un par de sugerencias para comenzar son OPA2134 y TL082. Hay 2 amplificadores operacionales en el tubo 03, así que recuerda eso. Se pueden comprar en digikey.com o mouser.com, no los obtenga en ebay o amizon.
@@ranbymonkeys2384 tengo op muses 02 y válvulas 5654w
@@franciscosanchez9548 Entonces, está más interesado en los condensadores o se preguntaba qué amplificadores operacionales tenía en el tubo-03?
@@ranbymonkeys2384 me gustaría poder modificarlo y tener un tube03 espectacular en sonido, busco los cambios necesarios que se tengan que hacer
So whats the tube really do?
Back in the day that's all there were, tube amplifiers. They sound warm compared to modern amps.
I mean if the sound affected by the op amp, should i change the tubes too for better quality?
@@ranbymonkeys2384 hi sorry need to ask you again, do you change electrolytic caps too? If i change it will it improves the sound?
👍🏼👍🏼👍🏼
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It has come to my attention via the comments that some of you are getting the booster shot. Please stop, it's making you stupid. Thank you and good day!!!!
Both op amp ne5532 come with unit are surely fake. Any replacement with real op amp will improve the sound alot. Even philips ne5532 original one will improve sound.
You can check with phone camera, just turn on the flashlight and zoom in (macro mode). The finishing is very bad.
umm ya
hey man experiment using pio
pio?
How about AD827JN ? other person did it and it seems sound better too than stock(5332) th-cam.com/video/ONBUGwALT6o/w-d-xo.html
The price of AD827 JN is like 11-12x times more expensive than TL082CP where I live, and 2.4x the price of OPA2134PA.
There's probably also NE5532, but it's also much cheaper than AD827 JN which is 7x NE5532 price.
Anything is better than the ones in it.
Cannot buy those small Wima MKS4 1uf/250v in Vietnam. I bought RIFA PHE426 1uf from Aliexpress.
good luck with that, you can't order them?
@@ranbymonkeys2384 already changed about 2 months before. There are many MKS4 from aliexpress but most of them seems fake. shiping from digikey or mouser are too expensive.
@@Vuvovi Id you don't get them from Mouser or Digikey you will be in the same situation. How much is shipping?
@@ranbymonkeys2384 from mouser, shipping worldwide costs 25USD. 4 caps are 6.48USD only.
@@Vuvovi I always order at least 10 even if I don't need them and they are cheaper that way. Just make a list of all the stuff you need for 1 order.
Electrical engineer with design experience of 40 years. When someone says op amps and capacitors need a break-in, it destroys the credibility of everything else they say. They are either lying or are ate up with confirmation bias. Or both.
Have you ever swapped caps in an amplifier?
When it comes to op amps you can have your bass and treble (EQ) at a setting and that will change drastically after 20 to 25 hours with a new op amp.
OK, then.
Put in parts worth few hundred $ into 30 $ preamp and talk about improved sound quality lol.
Amazing how different good components are. Some will still tell you it doesn't make a difference. Now you can tell them it does.
fx01 tube better sound quality 03.
I would say the 01 sounds better than the 03.
@@ranbymonkeys2384 yes ( google translate)
@@oppoart6512 I had one and sold it, I wish I didn't because the 01's are hard to find.
@@ranbymonkeys2384 so do you think its better to mod the 01?
@@AA0011. I replaced the 4 1uF film caps with good ones and it sounded fantastic. I think there is another little 1 uF cap in the center of the board too I don't remember. But the red WIMA caps will fit right in there.
Great stuff Monkeys!
Please do not change your production methods, they are so cool! : )
Is this the right spec for the suggested caps?
WIMA MKS4-250 1,0µF
Thanks!
You want to try to get the MKP4 P for polypropylene
@@ranbymonkeys2384 I'm getting them here in Austria.
The specs says (in German):
@@markduran2942 there made in Germany
my chat is acting up: I wanted to say, in German it says
METALLISIERTE POLYESTER (PET) - KONDENSATOREN, meaning, metalized polyester capacitors.
That's is a mess honestly, ruined the footprint, if you want more power get a bigger amp.
too bad nothing I did gives it power
look at it as a rough draft then you fix it up. But you, there is no fixing.
@@ranbymonkeys2384 this first watt is the most important.
@@the_famous_reply_guy thanx