I built an amp!

Here’s the final photos of the finished amp. This is the Stewmac Deluxe Reverb kit (which is a rebranded Mojotone kit). I got a repro faceplate but I decided not to get a “Fender” corner grille badge as a tribute to the “no logo” 1964 Deluxe Reverb (since the faceplate has the pre CBS “Fender Elect Inst Co”). Plus then it doesn’t look like every other DRRI out there. Speaker is a Weber 12A125a. Sure it’s not the archetypal DR speaker but wow does it sound great in here! Also pictured is my 1967 Mustang.

The amp's tone? Awesome! I'm not one to argue hand wiring makes any difference in tone, but there's definitely a difference between this and a production DRRI. I'd always been turned off of the Deluxe Reverb from the DRRI's I've played through. They sound "nice" but always flubby in the low end and the reverb is so splashy that it gets out of hand above 3. Not so here. Rich, full bass response. No harshness whatsoever in any of the frequency ranges. Reverb is gorgeous! Even turned up to 5 or 6 it's deep and lush. Tremolo sounds great with no ticking or any other oddities too. I've got a bit of 60 cycle hum in it at idle and from everything I've seen online that's probably one of the tubes so I have a bit of tube rolling to do to see if I can run that down. It's not intrusive though. It came with a full set of brand new EHX tubes and I've yet to try anything else in it. I used it at band practice last night and it was AWESOME!

This is the third amp I've built and the first Stewmac kit I've tried. The instructions were very thorough, however at times I didn't follow their method of doing something or the order because I knew from experience I'd rather have it a different way (for example I did a ground bus bar across the pots and grounded to the input jacks rather than just run all the ground leads to the backs of the pots). It was certainly different being told what to do and where to do it as opposed to the Mojotone kits where you get a layout diagram and a schematic and that's it. There were times I appreciated the instructions but also I did somewhat miss the "puzzle" aspect of figuring it out for yourself. I have to say that Stewmac customer service was outstanding. I had a couple issues with the kit as a few parts arrived damaged and they immediately had replacements sent to me and paid for the return shipping for the unsatisfactory parts. They took care of it 100% with no questions asked.

Pictured with my 1967 Mustang.

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Wow! That looks fantastic! Was it a hard build? I've built pedals before, but don't think I have the skills for an amp.
 
Wow! That looks fantastic! Was it a hard build? I've built pedals before, but don't think I have the skills for an amp.

It wasn't bad. But not without hiccups. The Stewmac instruction booklet is VERY detailed. The only complaint I'd have is that Stewmac's version of the kit uses yellow wire for almost the entire build. Mojotone's version uses different colours for various leads. Only reason that matters is when you go to start hooking everything up, with the Stewmac kit I had to use a multimeter to check which lead was which - especially when you twist wrap two together. A Mojo kit itself is basically, here's the parts, and here's a layout diagram. Go. So you have to be willing to work from that level when you do their kits.

I have seen some guys compare these to Lego sets - but then Mojotone themselves actually says "these are not Lego sets". I would agree with Mojo on that one.

It's all great if everything goes together and you have zero issues. Troubleshooting is when it gets complex. On this build it seemed all good. Used the amp for days. And then one day I was playing it and there was a sudden "POP" and then the amp was buzzing really loudly. Volume controls didn't affect it at all. Then I gave it a whack on top and it stopped and went back to normal. Gave it a few more whacks and it seemed to crackle a bit. I had to open it back up and then it was time to go through the entire thing while it was plugged in and switched on and start poking around with a chopstick. Eventually I found one lead to V3 that snapped and popped when I touched it. Resoldered both ends of that lead and tried it again and then it was completely quiet. Seems that was the culprit because it's been operating fine every since.

If you were going to try a kit, I would say start with something less complex. My first build was a 5E3. Another popular first build is a 5F1 Champ. Anything with reverb and/or tremolo is going to make the circuit way more complex.
 
Been thinking about a project like this, I've hot-rodded a Fender BDRI, basically, replaced 80% of the original components, but have never attempted to build one from scratch, this looks like fun!
 
It wasn't bad. But not without hiccups. The Stewmac instruction booklet is VERY detailed. The only complaint I'd have is that Stewmac's version of the kit uses yellow wire for almost the entire build. Mojotone's version uses different colours for various leads. Only reason that matters is when you go to start hooking everything up, with the Stewmac kit I had to use a multimeter to check which lead was which - especially when you twist wrap two together. A Mojo kit itself is basically, here's the parts, and here's a layout diagram. Go. So you have to be willing to work from that level when you do their kits.

I have seen some guys compare these to Lego sets - but then Mojotone themselves actually says "these are not Lego sets". I would agree with Mojo on that one.

It's all great if everything goes together and you have zero issues. Troubleshooting is when it gets complex. On this build it seemed all good. Used the amp for days. And then one day I was playing it and there was a sudden "POP" and then the amp was buzzing really loudly. Volume controls didn't affect it at all. Then I gave it a whack on top and it stopped and went back to normal. Gave it a few more whacks and it seemed to crackle a bit. I had to open it back up and then it was time to go through the entire thing while it was plugged in and switched on and start poking around with a chopstick. Eventually I found one lead to V3 that snapped and popped when I touched it. Resoldered both ends of that lead and tried it again and then it was completely quiet. Seems that was the culprit because it's been operating fine every since.

If you were going to try a kit, I would say start with something less complex. My first build was a 5E3. Another popular first build is a 5F1 Champ. Anything with reverb and/or tremolo is going to make the circuit way more complex.

This is great info, and I appreciate it. I am pretty sure I can follow instructions well, but it is the troubleshooting that I am apprehensive about.

How many amps did you build before this one?
 
This is great info, and I appreciate it. I am pretty sure I can follow instructions well, but it is the troubleshooting that I am apprehensive about.

How many amps did you build before this one?

I've built three so far.
1st: Mission 5E3 (Mission no longer sells his kits but they were really good when he did).
2nd: Mojotone 6G16 63 Vibroverb
3rd: Stewmac 66 "D Reverb" (AB763 Deluxe Reverb).

The 6G16 VV and the Deluxe Reverb were about the same in terms of complexity. Once you get into a Fender circuit with both reverb and tremolo on them the build and layouts are very similar. The only differences are with the circuit itself. Mojotone has a bunch of videos up on Youtube on "how to" build their 5E3 kit and their Deluxe Reverb kit. They're not exactly step-by-step but they do provide a ton of great info on how to approach different aspects of the build. Like I mentioned before, Stewmac sells rebranded Mojotone kits but they have a few tweaks to their own specs and they provide an extremely detailed step-by-step booklet. Not joking, the thing is literally broken down into like 166 individual steps. If you're a first timer, I would say don't go with a kit that doesn't include an instruction guide like Stewmac. Also, just wait for the next 10% off everything sale there and grab one then.
 
Yeah, that is really excellent work -Ive built, wired and soldered so much stuff professionally -and this really is top shelf work.

Only problem is, when it looks that perfect -can it possibly have any Mojo? (I kid I kid)

Im building a 50W JMP style this winter and putting it in a smaller cabinet for sitting on top of a 2x12
 
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