fender twin reverb amp tips on tubes you should try!
ฝัง
- เผยแพร่เมื่อ 28 ส.ค. 2024
- this video I share with you some tips on these wonderful Fender Twin Reverb amps, some do's and don'ts, and replace the power tubes with a set of 6L6 quads. some information that will help you if you own one of these amps or a tube amp in general. thanks for checking it out!
/ pretorious
click the link above and get entered into the free guitar giveaway contest going on right now!
I have a 1968 Super Reverb Silverface drip edge. Its the AB763 circuit. The numbers on all the transformers as well as chassis stamps (inked as well as "hard stamped") indicate '68. Also the presence of factory soldered grid stoppers (present on AB763) and other unmolested components indicate a '68 AB763. So, my point is that there are Silverface amps that are essentially blackface right from the factory.
BTW, I ordered some Ruby 6L6Gc's for my 68 Super. They were supposed to be here Tuesday. If they don't, it'll be Goodbye Ruby Tubes Day. lol
Love the Video and subscribed. Thanks
I had a microphonic tube in V1 of my 65 Twin Reverb reissue. Watching this video I learned that all I had to do was take it out since I don't use channel 1 anyway. Thanks for the help!
Nice Drip Edge Twin! I found a 68 Drip Edge Twin in a charity shop in Camden London. No speakers in it but otherwise in pretty good shape. Still had the original footswitch.
wow very cool! these old amps are hard to beat! I was lucky enough to score the original footswitch with this one as well, and oddly enough 2 extra speakers. lol thanks for check out my videos!
With all respect's this video is a collection of wrong informations. Sorry but only reason not to touch tubes with bare hands is if they are still somewhat hot. Tubes are not halogen bulbs to break if you leave residue from your hands on it. Glass envelope is strong enough for normal use and handling. You want to use circular motion because it is easier to pull them out specially out of the bear trap tube holders. Tubes can take normal use when you use the common sense. Worst offense is about hum and biasing though. In some amps with quad power tubes there is a pot for adjusting balance between the tubes to better match them and it reduces hum in some situations when tubes are not matched that well. This has nothing to do with biasing. You need and want to bias fixed bias amp when ever you change the power tubes. With cathode bias amp you can change the tubes without need to change the bias, mostly. Even on the cathode bias amps, sometimes, you have to change the cathode resistor because vintage amps where designed to operate with old mains with lower voltage and to operate with old tubes that where handling way more abuse then before. Old amps like that have to low values of the cathode resistor and power tube/tubes might red plate with current mains voltage and newly build tubes. Biasing amp is crucial and necessary to avoid it to replace and burn it self out or to sound bad. Only sometimes someone gets lucky that tubes are similar and they do not need biasing in the fixed bias amps. Very very rare occasion. Red plating after tube change is not that often but when it happens it can cost you tubes, resistors or even one of the transformers. Mostly it just sounds worse then it should. I get the need to save money or have pleasure doing it your self but then learn how to do it properly. Bias adjustment is done adjusting the negative grid voltage while monitoring it and monitoring the plate voltage as well. More current tubes pull lower the plate voltage goes. This change is not that huge but voltage been high and current being low plate dissipation power is affected by that drop. You do not bias just the plate current you bias plate dissipation power and that's what you get when multiplying plate voltage with plate current. Remember cathode current you typically measure when biasing amp is total current and it is plate and screen current together. So typically plate current is 5-ish mA lower. Get that plate current in amps and multiply it with the plate voltage and you get the plate dissipation at that bias point. This number should be 70 to 80 percent of maximum plate power dissipation of that tube. Main thing is not to be to high or tube will burn out. Tube normally stabilizes at some current and it takes some time until it gets warm enough, but if negative grid voltage is not high enough current will keep on rising until something burns up. You find maximum plate power dissipation number in the data sheet of the given tube. When negative voltage is to low, for the tube used, plate current will not stabilize and tube is going to kill it self and possibly some amp parts. That is why you need to learn how to do this proper or why you want to bring it to the proper guitar tube amp tech or builder. V1 is designation of the tube on the first place in the signal chain. It contains first gain stage and it is most sensitive place in the amp. Changing it affects the tone the most. It is preamp tube but all of those smaller tubes are preamp tubes. In some amps with two channels they have practically V1 for each channel so That tube is kind of V1/2. On some of Fender amps it is enough to place non used channel volume at 0 and it will result in no "signal bleed" and better sound. In some other old Fender amps like Deluxe 5E3 adding some volume on non used channel makes it sound better. Anyways just put level of the channel 1 to 0, when you are not using it and there will be no need to take the tube out of the amp. When you do take it out you are risking losing that shield and risking the tube socket as well. It will get dirty and might even corrode. Pitty to ruin the socket while those old sockets are very good while maintained properly. I really hate to sound like hater but it is important to me that people who are watching trying to learn from it do not kill their nice vintage amps by following this advice how ever good willing it was it is very dangerous. Red plating amp could start the fire and will kill at least the tubes if not more parts in the amp.
I'm not saying I know for sure on THAT particular amp, but Fender used up those AB763 tube charts on the later silverface amps. They were leftover from the blackface amps and they didn't want to print new ones since the tube types and tube locations were the same. The circuitry changed around 1968 or thereabouts.
yup they changed quite a bit of things in or around 1968, still these amps are legendary for their sound and performance. red knob evil twin also was a great one. thanks for checking out my videos!
I’ve got a 72 pro reverb and I really don’t think I could ever find a better amp for the tone I’m looking for. The twin are great too, just a little too much wattage for my needs. Great video Randy 🤙🏻🤙🏻
I used to have to put a '76 version of this, up over my head and carry it through the crowd and drop it down so I could get it through the door, then back up and out the parking lot to my car. These days, my spinal discs have collapse and I cannot walk without pain. It's a wonderful world ...
Mullard is making some real fine sounding tubes these days, out of Russia, I think.
I did that tube pull, speaker disconnect thing and it vacuumed!!
I’ve owned gigged with them for years, I modded mine to half power, made it better and lighter
it's amazing the things you can do with these amps. thanks for checking out my videos!
That amp is sounding great and you’re going to have a ball playing the tele through it. Good tips on replacing the tubes.
Hey don’t talk about my brother Ben like that,,,lol diggin your video brother.
Scratching my head as to why it has taken me so long to get myself one of these beast!
The best amp in the world for taking pedals without a doubt! Rock on brother.
Man that squire sounding really nice.
we was waiting for you to bust into "I'm your captain", that was fun brother 👍
Bias is not to remove hum. It is to set the proper voltage so your tubes don't burn out too soon or sound cold and lifeless. The adjustments on some Fender amps is a hum balance .
This guy doesn’t know what he’s talking about. First thing you do is bias. No sorry the first thing you do is verify the filter caps are not original and change them out.
The him isn’t unbalanced tubes or even bias it’s leaky filter caps.
People really need to know what they are talking about before they try to instruct others. The blind leading the blind and they both fall in the ditch. @@MarleyWigston
I love tube amps. Hell, I guess all electric guitar players do. I have a Fender Blues Junior and man that thing just ROCKS. Glad you got this one rockin' at full power. You are one lucky man to have such good friends. To have an amp like that given to you is freakin AWESOME, brother. Couldn't have happen to a better guy. Take care , my friend, and I hope all is well with your Mother. Cheers to ya.
many thanks brother! yeah man tube amps rock! my son traded his Marshall stack for a Randall and has regretted going from tubes to electronics ever since, he was dreading spending the money to re-tube the Marshall but now he wishes he had did it and kept the Marshall, needless to say he loves this Fender Twin! :)
Thanks for the tip of pulling the V1 tube for better sound !
no problem mate, thank you for checking out my videos!
Since the best power tubes (NOS RCA black plates) are almost impossible to find a matched quad, the best available 6L6 tubes available today are the vintage Svetlana winged C's. If they arent the winged C's, they are just Sovteks like these Ruby tubes.
What do you mean hopefully you don’t need to adjust bias? If you want the tubes to last, and other parts of the circuit to last and the tone of the amp to be optimal you bias the amp EVERYWHERE TIME you change tubes and for that matter every few months throughout the life of the power tubes.
That him you hear means that likely those filter caps are original and they at the very least along with the bias cap should be replaced. They are leaky.
Great demo and video mate.. I have a twin and i have chucked KT66's in mine, and put an EMINENCE Texas Heat and V30 running at 8ohms and a secondary Fender 212 cab also at 8ohms. Sometimes i half power it too and it takes drive pedals beautifully.👌👍
@mandobanjoguitar TH-cam won't let me reply directly to your comment, you probably just need to replace V3 and/or V4 tubes, usually the reverb box inside the amp with springs in it never go bad, if the amp has never been re-capped it's also possible the electrolytic fluids have dried up.
Thanks Randy. I was waiting for this video and it was well worth the wait. Thanks for the great info.
thanks for checking it out Gil! I hope it helps.
Hi, I have a service centre in Brazil which is Fender Marshall, Laney...Authorised; that hum is very likely caused by bad electrolytic capacitors (this is going to be very likely the case with the make of IC capacitors Fender use on later models).
Hi Randy, just subscribed to your youtube channel, anyway, I had the good fortune to score myself a pretty cool mid 70's (I think that's what it is) Fender Super Twin amp from a guy who sold it to me for $300.00 Australian, it's in pretty good working condition and sounds great, it uses a total of six 6L6 power tube and puts out about 180 Watts R.M.S. or 395 Watts peak, it is housed in a wooden cabinet for a Blackface Fender Bassman.
nice amp man hold onto it
I HAVE TWO TWINS AND A PRE AMP TUBE DIED ON ME - THANKS FOR YOUR VIDEO!
Hi Randy from Australia I thoroughly enjoyed your video just wondering how are things going with you over there 🇭🇲🙏🇭🇲👍
This inspires me to go in and grab mine and clean her up. Thank you for the video!
very cool thank you for watching!
That is a pretty sweet setup!! I've been waitin' an a wonderin' what was gonna happen with that amp. Hope you get many years of good use out of it!!
thanks mate! it should be good to go for years now, it'll probably last longer than I do lol
What a great Amp
RANDY SCHARTIGER, the voltage goes up when V1 is pulled but I thought vacuum tubes had very high input impedance and the plate output impedance "shouldn't LOAD" down the other preamp tube when its shared in parallel. Like you said both preamp tubes plates are shared tied together. The DC plate voltage will raise higher when pulling removing V1 on the normal channel. This also changes the "impedance" to next following stage is use to seeing as a load? What i mean is that is changes the Tone of the preamp section now since you removed the unused preamp tube of the parallel channel. Is this true or not that it changes the tone and impedance?
I love the Twin Reverb amp!
me too Ed, it's amazing how clean this amp is, driven hard enough it starts to get a little of a gritty sound but is soo nice!
So when will you be shipping it to me Randy? haha! :)
That's a great amp Randy. I need to do that to a 71 vibrolux I have. It's way overdue. Thanks for the demo.
these old tube amps are well worth doing especially if that's all they need, they just keep on ticking! thanks for watching brother, cheers!
Great video ! Also awesome guitar playing!!1
You crack me up brother! I stumbled upon here watching silverface amp mods and I liked you within the first 10 seconds. I’m going to be doing exactly this same thing to my amp only I’m going to be removing the speaker that gets unhooked to lighten the weight of this monster. I love my amp but it’s a real bitch lugging this beast around and in and out of gigs. I will also be replacing the channel 2 preamp tube with the AX7 that I removed from Ch 1 which gives you a slightly fatter tone.
Omg Cleatus, the clicking on the keyboard…
i know you probably did this,but you could have mentioned that when you get an amp of unknown history, to check the fuse for the right one. since he was using two power tubes without unhooking the a speaker,you mentioned the impedense problem, so it may have blown a fuse or two and the owner may have put in a larger fuse. but good information, i didnt know about taking out the V1 tube,will that work on ny twin? i have a 74 that has been black faced i have a twin and have had problems with that tube. now i'll remove it and see what happens.
Great for me and this video.Hope you are doing better Randy.I'm fixing to get a Twin Reverb Silverface( not quite sure exact year) but it was a customer s and friend)who unfortunately passed away about 5 months ago and his wife contacted me yesterday and told me to come by this coming Wednesday to pick it up! I don't know anything about amps like I should.Question* I have 2 Peavy Classic Vtx 2-12s and could use some attention and maybe new speakers? Would they be worth putting $ into? They are tanks and for the most part work(1) does well.I believe late 70s early 80s.
What year was this one made? Does it have the push- pull master volume on it, or not?
I tell in the video what years this particular certicboard was used.
Hey just picked one of these up a couple months back and noticed it doesnt have any of those metal sleeves on the small tubes. What happens if i dont replqce those. Also i noticed the Vibrato doesnt work onnthis thing. The speed and intensity knobs seem dead. Any help on this would be greatly appreciated
it'll work fine without the tube covers they are designed to keep skin oil off the tubes and make them perform better and warm up faster. as for the vibrato it most likely is not working because of bad tubes, the knobs hardly ever go bad tho there is always that possibility, tubes are more likely the problem. good luck and thanks for watching!
good god thats really nice!!! love the tip of taking out the 12 ax7 out the number 1 channel never heard that wow you know your stuff on them very impressed !!! Gary gave you that?wow nice guy that thing isnt a cheap amp for sure,like all the songs you played must be close in age ive played all of them or tried you rock man wont elaborate on what you played ,you no boob tube would have a feild day on that ,hee hee i really really like your channel now (forrest gump voice ) and thats all i got to say about that
thank you man! have fun with it, it really sounds better and seems to have more power when your entire signal gets channeled into one channel instead of a portion of it getting bled into a channel not even in use. thanks for your comment and thanks for checking out my videos! cheers!
Is there a way to Mod a silverface Fender twin to sound like a Tweed Twin - the G.O.A.T? Thank You!
Haven't heard that sound in years, the hum used to drive me nuts.
lol me too! I always adjusted bias to get it as low as possible, I was lucky here and had very little hum.
It allways catches me when I hear periodic cycle hum in videos made in North America. You guys have 60 cycles, which produces a hum close to the note of B. Our 50 cycles here in Europe makes a hum close to G... Pretty nerdy, I know...:-)
I need to replace the tubes in my twin reverb. It's an early 70s model. Aby recommendations?
Great tips! Great playing too!
Thanks Randy, I just had to figure out which one was the reverb. Mine hasn’t got the reverb working!
I hope you figured it out by now, these are killer amps! thanks for checking out my videos!
I use it to record in my bedroom, I’m in a back house so my bedroom volume is louder than most. Removing the two 6l6 tubes works great. I use it with my electric piano too. Great vid! Appreciate the knowledge
@@benrush4461 you're welcome Ben thanks again for watching! cheers!
Now there is a handy and safe tube puller / inserter available on ebay, item 254242318237 Easy, simple and safe. A perfect tool for any audiophile or vintage electronics technician.
Hi Randy, thats a great video on tubes. I need your advice. I have a fender twin 65 re issue. It stopped working. It was on for a very long time playing a loop on my looper pedal at a very low volume. It just stopped working. I already checked the fuse. There was no smoke or smell. There is no local shop that does repair and its a back breaker to carry up the steps. Is there a progression of things I should check? I can tell you are an expert of not only fender twins but a player of cool skynyrd and sabbath licks as well. Where should I start? Thanks, Jim
nice jam man !!
Are the Fender eminence 12 inch 80 Watt speakers just as good as the rest brother? (in a 93 twin reverb RI)
fender twin is a great ampmine is a 72 master volume before the pull boost
Great 👍 playing right 👍
Intro killed me LOL
Sounds great bud.i. have an older 59 twin that I need to replace 2 power tubes in if you are supposed to replace 2 are a rime. I'll have to look it up.1 little drop of water from sweat on a glass blew 1 of them out. Science I've been running on 2.it belonged to my dad .than I inherited it from him.i looked up the value of it on line and was shocked to find out it was the number 3 ranked amp of all time.worth between $11500/ $115004000. But I need to have it gone thru and have a tune up done on it. Sad I only use it in my bedroom.
unless you do the work yourself make sure you take it to someone who knows what they're doing, those old amps are a nice piece of history especially if they still work. yours probably need the caps replaced if they've never been changed but thats an easy job just time consuming. it is amazing how much these amps still cost!
Randy Schartiger it still sounds great but I imagine there is a lot of little things that should be replaced like you said they don't last for ever.
Randy Schartiger those numbers I typed in wasn't what it reads like.look up 25 most valuable amps than you will see for yourself.the article is a few years old now but I can't find a current value on them. Hope you have better luck than I did.
I want to try this with a traynor ygl 3. The canadian twin reverb clone with el34s
I have a pretty brand new 1965 reissue twin reverb amp. But the reverb sometimes doesn’t work. I have to lift it up off the ground a couple inches and drop it to get it to work. Can you tell me what’s wrong please
I had a Deluxe Reissue that done that and it was the reverb transformer
Thanks. Is it easy to fix ?
Diggin the Molly Hatchet and Rev. Ted Nugent. Same era Im from.
I know the silver faces you can bias the idle current with a trimpot. Having a eurotubes bias tube socket insert makes the job super easy and safe. Is this is not the case with this one? Like your stuff but its a bit loosey goosey on some of the finer points
Hums are really low , after watching this video I’ll have to buy me a 65 twin reverb amp , what is wattage on your amp ? Reissued ones 85w..
What part of the country do you live in Randy?
Hi randy. Itresting video nice sounding amp love the clip at the end . Cheers rob
lol thanks Rob, had to return a little gun fire at the end lol
I have a fender "the twin" red knob 100 watt amp its a little different having 5 12AX7s 2 12AT7s and 4 6L6s the volume knob is like an on off switch is it a big job (expensive)to put a volume control on that isn't so touchy and what kind(brand)do you recommend and or is an attenuator a better idea?
When you pull 2 tubes and unplug a speaker, should you re-bias?
Howdy Randy, is there a circuit mod to stop the bleed over without removing V1?
Question: if I pull two of the 6L6's but leave both speakers hooked up, what risks do I run by having that impedence mis-match?
I wouldn't recommend it, it's easy to unhook one speaker when doing that. the impedance mis-match would put a heavy strain on the two tubes left in the amp, the louder you crank it the more strain, in fact the gain tube for which ever channel you're playing thru would also suffer. other than greatly shortening the life of your remaining tubes there are some other circuitry that eventually suffer from this if left unchecked.
Thanks for the prompt reply. Out of curiosity, I tried it for just a brief moment and it really didn't seem to change the sound much, so I just put all four tubes back in and I'm leaving it be. Cheers. :)
I don't think it is supposed to change the "sound", it is supposed to change the volume of the sound.
Yeah, that's what I really meant to say. Although it actually did slightly change the sound - a bit less low end. I didn't really notice a major volume difference.
If I'm trying to do a half-power mod on a modern Twin Reverb 65 Reissue (blackface), would I still pull out the two middle tubes and disconnect a speaker?
yes, because you want the ohms load to match what the amp is putting out. thanks for checking out my videos!
Man can you please tell me what I had plugged into the back of my 72 twin it went into the reverb rca inputs small black thing made my amp super gain nobody seems to know what I'm talking about
Thanks 👍
I thought it was called ice pack or something like that
It was stolen!!!
Knew a guy named Ben Dover. Lol.
Helloa I know this is an old video
Just a quick comment if you are going to spend money on new tubes they should always be biased correctly (EVERY SET WHETHER SET OF 2 OR 4 ARE DIFFERENT)
You potentially can cause damage to other components as well as your 200 dollar set if tubes if biased to hot the tu e life is significantly reduced if biased too low your headroom is reduced and you tend to get undesirable distortion in the signal (not the kind of distortion compression we like to hear)
Anyway I am sure you know your amp
Cool stuff Randy. Thanks for the tips. I haven't been using my tube amps much lately. Hooked on my darn Marshall SS amps. Go figure. I have a Marshall tube amp and I play the SS. I dunno?
lol know what ya mean TR, todays SS amps are sounding better and better, cold weather is coming and that's a good time to make tubes put off a little heat :)
I have a Peavey Windsor head (clone of JCM800) and it has 4 EL34's. That ought to work! lol
have you ever heard of the red knob 'evil' twin made in the 90s? it was my first real amp with a decent 2nd channel gain stage that I could play metal on. it was hilarious and I still have it after I had it get fixed up because I beat the crap out of it. still sounds great! was thinking about changing the 12at7 or au7 to all ax7 in V2 but not sure that is the right one to get a little more gain out of the 2nd channel but I don't want to screw it up lol!
yes I have! you don't see many of those but they are killer amps too! you should be ok to change the tubes as you mentioned but don't take my word for it because I have never tried it lol thanks for checking out my videos!
The red knob version is not the Evil Twin, although with red knobs it would make sense, but its not. The 94-2000 model is the Evil Twin. Similar to the pro tube twin that followed.
@@D-NastyNoise ya, I think it's really a Twin II which is what it says on the can lol. why did they get called the evil twin ?
@@BlaineLudeman It was difficult to fix, heavy and loud as hell! Lol
Snakeskin Cowboy!
I've got a '74 twin reverb. It's 100% stock, I don't think the tubes have even been changed. I think one of the power tubes is bad though, I ordered a new set of tubes to replace them. I'm excited to see how it sounds with fresh tubes. It sounds great now, it'll probably sound great with fresh tubes.
When you turn on the vibrato there's a weird clicking. Anyone know what the problem is?
The tubes have dates codes. My 75 has RCA tubes and the date code is 7515 reflecting they were made in the 15th week of 75!
That's all the guitar amp you'll ever need right there! And with the best circuit, too. You are one lucky son of a gun. Mine's "only" a blackface reissue, but even it has it all covered and sounds terrific. And loud(!). Lovely, lovely amps! You'll have your neighbourhood in constant terror and seizmologists puzzled with that amp hehehe... :-)
haha you are right! I've been practicing every day since this video was made about a week ago now, haven't had any complaining calls as of yet but I'm sure the neighbors have heard it a time or two lol wicked loud!
I remember years ago, when I had a mid seventies Marshall with a 4 x 12 speaker cab, I once cranked the damned thing in the middle of the night with my windows open (no, I wasn't sober when I did that...). The neighbours didn't SAY anything, but they... well... looked at me in a rather funny way for a couple of days afterwards...
how can i find which circuit my 73 has as it doesn't have a master volume
The diagram is on the left side glued to the wood inside left
Master volume control was added in 1972. If you don't have it, your amp is not a 1973.
Ruby (Shuguang) EL34 tubes sounded good. But their pins were too big in diameter. I felt like I was damaging my amp's sockets when I was installing them.
EL34's aren't designes for a twin. You need to get one of those yellow jacket converters!
EL34 pull more heater current than 6L6 tubes. Not a good idea. May burn out the power transformer
Hi Randy I try to do it like you then the left side big tube doesn’t work I put every thing back find ou the left two big tube don’t work anymore the tube is good how can I fit it
take it to a tech. You probably have a bad screen resistor on the socket.
I like this guy!
Randy - R U playing a Squier Classic Vibe? I also play a Classic Vibe Tele. I love it although it's a little on the hefty side. I wonder if I can rout out weight from the back? BTW - I have the "Blonde" version, which I think has Alnico 2's in it. I think the Butterscotch has hotter pickups. Is that true? I like my pickups. I was originally going to replace them, but I like them as is.
you can there is no reason not you couldnt
they are a bit heavier than you might think. yeah you could route it out to make it lighter but not sure how that would look unless you have some ideas of making it look right. they are awesome guitars I love mine too.
Randy Schartiger Yea-I couldn't believe for $299 on sale, it's an awesome Tele. I love playing it. I was going to rout some material from the back of it, & just make some plastic pickguard material & screw it into a recessed lip. What ya think? BTW - I have the "Blonde" version, which I think has Alnico 2's in it. I think the Butterscotch has hotter pickups. Is that true? I like my pickups. I was originally going to replace them, but I like them as is.
Good video Randy!!!!!)))🎸🎸🎸👍🏼👍🏼👍🏼😊
thanks Steve! this amp rocks!
If I am going to use only Channel 1, can I take off v2? or it only works the other way? Thanks!
I just leave them in there and know I have an extra one with me if the first one goes bad. thanks for checking out my videos!
135 watt twin use only 6l6 gc tubes only it will kill the others the amp has high plate voltage
Hello! How many watts Rms does each speaker have?
Those amps are loud and heavy! Good stuff at the end too. Lol! Rock on brother!
unbelievably heavy! now that it has all 4 power tubes and matched this thing is wicked loud! thanks for having a look brother! that end part was for a very special troubled individual lol a DMF lol rock on!
Do you happen to know if all these tips would also work with the '65 reissue twin reverb?
yes same tips apply, thanks for checking out my videos!
reverb cables at the panel reversed?
Any speaker change recommendations for more low end and mids?
not other than making sure you keep the right ohm load on the amp, more speaker always sound better but don't change the ohm load. thanks for viewing!
Cool video, but one thing that is a myth is the whole skin oils being dangerous for tubes thing, it's actually perfectly fine and safe to touch tubes with bare hands/dirty hands, whatever.
I dunno mate, I've heard it argued both ways, they get pretty hot. anyways thanks for viewing!
I have an original 69 twin with the master volume. Will pulling the preamp tube hurt anything?
No....must try it!
Hello Randy, I did something pretty stupid today and I think I killed my Twin reverb reissue... I plugged the footswitch into the external speaker jack and practiced with it like that until it died. There was a lot of heat, but the amp was on the other side of the room so I dIdn't notice until it was too late.
I notice that it was not nearly as loud as usual but thought something else in the chain was causing the volume drop. It is dead now and wont turn on. Have I really killed my amp?
Thanks for any help you can provide!
ouch! wow! that would really suck! you might have got lucky and only blown a fuse? plugging the foot switch into the output jack would almost be like a dead ground depending on the impedance of the foot switch. I would check the fuse and pray that;s all that happened, if not, it probably cooked your quads and possibly the transformer. good luck!
Any Info on your amp that blow up . My buddy did the same too his amp but he played it for a bit before noticing the switch wasnt working and shut his amp off . And after he corrected the connections and put power to it again .but it didnt came back on
The footswitch doesn't have an impedence like the one guy said. It is basically a make or break switch that shorts the tip or the ring to ground or both. It is a very bad thing to plug in the external speaker jack as you will be shorting out the output transformer possibly burning it up. That's not good. Your Amp is dead and maybe your speakers.
@@cacornett58 I got lucky, it was just the output transformer. It cost me about $100 to fix and I learned an important lesson; Don't rush when setting up!
Otherwise the amp is fine.
Would it be possible too use the reverb in and out as an effects loop to connect delay pedals?
yes, but the effects would be controlled by the reverb pot on the front of the amp and driven thru a 12ax7 tube, not sure how the quality of the pedals would be maintained.
thanks for the info
Bend over I almost choked on my beer😂😂😂😂😂😂😂
lmao don't spill the beer haha!
great intro, I suscribed jzjz
Thanks buddy! That was a great help!
Fellow Hill Billy mtn man Randy be like hot picker diy-er of all coolness wooden flattop tone boxes, now amps, teles 👍✝️☝️🇺🇸🎸🎹🥁👊🔥🤙🎶🎵👀😱👍🎸🇺🇸🔥👊
Great vid Randy,I had a Vox AC30 back in the day with the treble boost,was awesome but fckn heavy!!!! Sweet amp you got there,cheeers mate!! \m/
thanks mate! yeah this one is heavy as hell too! beefy transformers inside. rock on! :)
Sorry ,but what a hack , he don't know what his talking about. 1. chaining output tubes without checking bias is big no no, Shure it can work if you are lucky but noting to recommend. 2. pulling out V1 have noting to do with "bleed over" there is no bleed over in a twin! But what is going on is : V1 and V2 share a cathode resistor and when you pull V1 , V2 will see a lower value (820 ohm instead of 1640 ohm in standard ) this will give V2 a little more gain, and that is what u will hear if u pull V1.
wow haha i have an idea how loud it is now
someone is trying to sell me a 1975 that was just reserviced for 400 bucks. Worth it?
yes and a lot more! especially if it works! these amps cost big bucks now if they work!
Would you say playing with 2 tubes out and a speaker removed has a noticeable change? I just got one of the reissues and it sounds great, but unfortunately for my neighbours it is loud as hell!
Great video though, can tell you’d be great to have a smoke with, peace!
definitely noticeable difference, this amp only had two tubes when I got it and it still rocked, but when I added two more and had all four new it made a major difference in volume. yeah man pass it over here :) cheers!
it was raining when you do the video - was it ?
yes it rains here almost all the time lol
Who the hell is Ben Dover and why you so mad at Him?
He's a director
Demo that sucker on 10!!
I saw a guy doing that here on youtube, I don't know how he stood it lol thanks for watching!
@@RandySchartiger isntlop