Mojotone Fender Princeton Reverb tube guitar amp kit build errors Initial inspection advice success
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- เผยแพร่เมื่อ 28 ส.ค. 2024
- Yes, another kit amp arrives the bay at the good ship D-Lab. Unfortunately full of build errors. My plan, gut it and start over. Yes, this will take time & expense. The owner understands. My message to all of you. If you buy a kit with good intensions, but then think, well I might not be up to this, send it to me. I will build it properly, give you a plug & go amp, save you time & money. I'm sure there are many unbuilt or failed projects out there. D-Lab accepts the danger. Contact me if you are in need. D-Lab-Out...
In the old Heathkit days, if a customer got stumped assembling a product, they could either work with a tech oveer the phone, or send the product back to the factory and have a tech repair or finish the kit. I imagine that service model would be prohibitively expensive today. Their motto was, "Never allow the customer to fail."
i bought a old 1958 heathkit pa and it came with the service manual and a letter back and fourth to the customer regarding values/ problem solving to fix the guys amp. cool notes and letter from 1958
great kit. I have been fortunate to build several MojoTone Kits including a Princeton reverb. i do want to add that an amp with 7 tubes, reverb, trem and then modifications it's not the easiest in the world. Especially if it is a first build attempt. If you are new to building slow down! One thing i did starting out was use a highlighter and mark each wire/component one at a time as I soldered them in. Just my .02 cents maybe that will help someone. D-lab will get it straightened out!
I'm going to attempting the Deluxe Reverb, i just ordered it today. I'll keep this advice in mind
@@richardcron2395 good luck, i have a blast building these things! Hope you have a great experience.
Using a permanent marker to draw lines along the lenght of wires, you can get more color codes than the typical rainbow wire kit. Yellow/black stripe, red/black stripe, etc.
Starting with a tweed champ, though I've done about 4 pedal kits first. Princeton next if the champ goes well.
@@michaelwbuncher7599 Great amp to start with and It will quickly become a favorite. If your not familiar playing thru one you are going to be shocked at how good that little circuit sounds. Good luck!
"There's no hope for this amp we'll nuke it from orbit and leave this Quadrant."
"Wait Mr. Spock, we have Mr. Dayton on board. He's willing to give it a try.
Spock's eyebrow raises....
Keptin, sensors have detected empty tube sockets. I suggest we raise shields as a precaution.
Dammit Jim! I'm a doctor, not a tube amplifier tech!
Terry, God Bless and Protect you for sharing your life and wisdom with your united in love community, well done CAPTAIN:)
Correct Yeoman, SCENARIO!
Check, Check, Check at every sage of building..Then recheck..!! Must have been a really inexperienced Builder., but D-Lab to the rescue...Look forward to next episode captain..Ed..uk.😁
Lol..."The Wrath of Mom" corrected you,...correctly. I love that movie, and the original episode.
Tube guitar kits . The final frontier. Thse are the voyages of the USS Dayton. To boldly go where someone else has gone
before and done , a very bad job. Danger Will Robinson ,danger. Whoops that's another show!
“Well, here's one thing you can be sure of, Mister. Leave any other show references in your quarters, there's no room for it on the bridge.” Kirk out.
You are brave and skilled to take this on. The builder was clearly in over his head from the start.
I must admit this very same path was one that I had very nearly embarked upon. Thanks to your videos I chose to pass on the DIY. It's nice to know I am not the only one, and your client has more cajones than I do!!
Terry, you are the right person for the job. That amp will sing like it never did before :) Good luck my friend.
First build should always be a simple Fender Champ. Play around with that circuit for a while. Perfect it. Know it in your sleep. After that circuit, it's all add ons. For me, the best sounding amps are the simplest circuits.
Terry, that was point on and lesson lead:) Great example of helping people see all the options and the best option to solve their problems:)
The people playing their amps are supposed to be feeling the freedom and creativity of the sound of an amazing amp gives them, not pain and suffering:)
Terry sounds PISSED! (and I don't mean 'drunk'!)
Love the trek stuff! Always boldly going! LLAP
this video left me "ENERGIZED"
So, you're saying don't buy a kit if you then have to have it fixed, better to buy one from a Marsh Amps Instead. Youre righty Terry!!!
These kit amps can be a real headache to troubleshoot because you can't assume anything on them is right. The Mojotone instructions say to use a ground tab for the high voltage center tap, but I would recommend soldering the center taps directly to the chassis. They probably assume that most people are not going to have a high wattage iron. Over time, that tab can become loose.
Well, whoever did that mess, should practice building low voltage battery powered equipment first, preferably for many years.
Connecting the plate and grid of the same triode of 12AT7 together surely gives quite a mojo to the tone but only when the amp is both fully working and fully cranked up first, before connecting that plate voltage to grid, and that mojo sound can last less than a second so be sure that your mother-in-law is near the loudspeaker at the very moment.
Awesome...I'll be following.
I like "Star Trek" toys! Beware of Klingon activity in those wires!
The added bias pot and screen grid resistors are a rob robinette mod. If they followed the rest of it there should also be a grid leak resistor on PI and 18k resistor, I think, on the cap can.
Live and learn...well, usually.
Nice :)
That's what I'm talkin about!
Can you name the episodes? Marcia dug up the famous 1 liners for me
@@d-labelectronics I gotta rewatch.
Your the best!! Lol. Big Trecky.
This one was built by the Klingon who is a fan of the Murphy Law. What ever could go wrong is wrong. Joke aside most probably first build for someone.
You beat the Kobayashi maru
Hey, I’m starting this same build just now. This is my first. I’ll try to do it right !
I will be posting a follow up vid showing some improvements & tricks for a better turn-out
Thanks Terry. I’ll check it out 😉. I’m still struggling with the Frontman 212R ... another story !
what would homer Simpson say?
one big concern is how dangerous could it be to your health if you don't understand how high some of the voltages are on somthing like this
DID I MISS IT, OR HAVE YOU DONE AN OVERVIEW OF YOUR WORKSPACE (THE FINAL FRONTIER) ? WE ARE COLLAPSING TWO HOUSES INTO ONE UP HERE IN PLANET CANADA, HAVING ABANDONED PLANET NASHVILLE. AS A RESULT, MY WORKSPACE HAS BEEN TOSSED LIKE A DRUNKEN SAILOR ON A SHIP IN A HURRICANE. IWOULD LIKE TO KNOW HOW TO ARRANGE MY SHOP TO MAX BENEFIT. OH, AND WHAT IS YOUR PREFERRED TIPPLE (NOT TALKING THAT FLYING DADDY LONGLEGS THAT EATS MOSQUITOES AND THE OCCASIONAL TRIBBLE). SORRY FOR THE CAPS, I'M NOT YELLING, JUST VISUALLY IMPAIRED.
The builder here decided to follow a schematic that he/she didn't understand. Don't make things before you have a conceptual idea of what goes where. This is not a math test where you just "remember the formula". If you don't understand it, this will fry you.
It seems like building a kit like this for a novice may be a bit much, but regardless, if the build is approached as a learning experience, and taken slowly and carefully it could be a great learning opportunity. Or you could die. Hopefully the former will apply, not the latter.
Off-topic captain
Is your yeoman telling you you're spending too much time on the bridge and get back down to engineering, and is the wine replicator keeping up with the increased warp speed?
Not trying to be a troll, but rather add to the jocularity as father Mulcahy would put it.
Probably best to start with a Fender champ circuit, or similar, if you want to learn something?
I have not seen their instructions. Are the instructions so sloppy that it makes it easy to create errors, or are the instructions actually well written and illustrated, and the mis-wire is the inability to follow directions??
I didn't look at their instruction booklet, but the wiring diagrams look good to my untrained eyeballs.
Their instructions are VERY complete, with many details. The kits are very nice...
Yes, No problem with the build sheets
Have you read mojotones build manual and found any mistakes.
If following the schematic, how could there be so many errors?
It’s dead Jim
Some mess!
Wow that was an expensive and complicated kit for a novice to attempt. At least learn to look up the tube pinouts first, and maybe build a Champ. With that reverb section, it's like building 3 champs on one chassis....
(I LOVE the Fender Champ by the way- genius😍)
didn't look like that there many mistakes.
I generally like your channel but you need to back off on ppl who make mistakes. Seriously, you only learn if you step outside your comfort zone and that’s where you’re most likely to make mistakes. Turning around to tell ppl don’t undertake this if your not qualified when they’ll never reach that point if they don’t try is dumb. I think the same thing about your “cobbler” skits. Explain why it’s a mistake. Explain why it won’t work. But stop kicking down on folks who’re clearly less experienced than you. They’ll never get to your level if you keep it up. You’d prefer there be someone capable and interested in this when you’re gone right? Maybe that guy won’t try electronics in the future bc he failed here and you shamed him about it. This could have been the tip of his proverbial iceberg that lead to a whole new passion after he’d learned from his mistakes. He knows already he made mistakes that’s why he sent it to you what he doesn’t need is a lecture on not biting off more than you can chew. My 2 cents. Cash it where it suits you.
Yes, I cleared this with the owner. Point is, to save people time & money.
I don't think Terry was being condescending at all. That is like a $700 kit, and a novice has no business with it. Wired incorrectly, that high voltage feed can kill, and it has.
Yes, Was just covering the problems with a Star Trek twist
Lighten up. Terry is making learning electronics fun with the cobbler skits. As noted in another comment, tube amps have enough voltage and current available that a simple mistake can be fatal. Point is if you are making simple mistake as shown here, it is very likely that this person does not understand electronics well and how to safely work in a live chassis...A Very Dangerous situation. This is not a knock on anyone it's just reality. Sure there were many Kits back in the day from Heathkit etc. and it was dangerous then...just like how there was a time before seatbelts and little awareness of the dangers of smoking cigarettes. I believe Terry is a good guy and doing a great job at providing entertaining teachings of electronics.
@@johnathandavis3693 have you priced non-functional tube gear lately? $700 is not a price point that should keep ppl from trying something new. Especially since it comes w way more instruction than learning by repairing/modding. If you wanted to take up welding as a hobby price a new mig welder for me. Or you wanna take up woodworking price a set of chisels and a plane for me. New hobbies cost either way so the implication that $700 is just too much and should be causing ppl to not step into this is patently ridiculous.
Advising ppl to be cautious is different than advising ppl not try unless they’re 100% they can do it w/o any mistakes.
I honestly don’t want to argue this out cuz that’s not going to help you or me. I already see your perspective, that you’re not intentionally discouraging ppl, now I’d like it if you could attempt to see my perspective that your approach might be discouraging ppl unintentionally. I’m not implying someone’s “bad” or that I’m “right” and by extension you’re “wrong” but attempting to elucidate a different perspective.
Someone spent a good chunk of money on a very nice kit' and F'ed it up'
Congratulations here's your sign 👏 '
That pesky cobbler...