The Amp Garage

Looking good Dan!

Thanks Martin!
I’m glad I’m not driving you guys nuts with my questions and happy to “help” in my own special way, lol.

Random update: tested the amp a few different times today and none of the strange behaviors have returned. Pilot light is bright and consistent; no cutting out with the sound, voltages are all good.

Great lesson for starting with the simple things first.

Ok folks, I think this post will close-out this build thread. Here’s some final observations: - After playing with the HRM quite a bit - I seem to have settled on these settings (for now): —bass: 185k, mid: 8.7k, treble: 115k - The EVM-12S is back in the cab. The “grunt” of the G12K-85 wasn’t enough...

Looks good jer-vic!
Always liked the idea of this design due to its simplicity and versatility. I’ll have to build one some day. Eager to hear your impressions of how it sounds when you are done.

Thanks pullshocks, but it turns out that wasn’t the end of it. The next day I went to play it and got absolutely no sound (but the pilot light was consistently bright). Out of the cab again, bring it up, check voltages, inspect important connections, everything normal. Plug in a guitar and get faint...

Understood Drew and Max, thanks for the replies! After posting this, I unscrewed the jewel and immediately noticed that the bulb was loose in the socket. Took it out and then saw that its contact surface was sort of lop-sided - which I thought would make it prone to poor seating. So I cleaned the co...

So I’m playing my 2nd gen ODS clone today and I hit an E flat at the 11th fret of the high E string and the note rings, then fizzes. At the same time - I notice the pilot light (regular socket type, not an LED) dimming. It’s like that note on that string is vibrating something and causing this behav...

Hey, didn’t even think of that Martin. Conditioned through the years to reverse the “power-up” process without a second thought. Sometimes the simplest answer isn’t obvious; but for me the obvious is usually the least simple, lol. Sounds like a fortune cookie :roll: Thanks for the advice Martin! I’l...

Small little detail I’m looking for advice on: When I switch stand-by to “stand-by” during power down, I sometimes get a “pop” through the speaker. Is this something that can be solved with a capacitor on the switch or is it indicative of a different problem I should be chasing? I’ve searched and se...

Thanks Martin! I figured a little over 2 was ok - as long as it was at least 2? Truthfully, the whole FET “sausage” still eludes me as far as understanding the second and third order effects of this part of the circuit. I do know that it definitely helps my single coils sound better through the amp ...

Still sounds great today (IMHO). Tried a Celestion G12K-85 with it. It’s a pretty full range and neutral speaker for a Celestion and I figured it might work well with this circuit. Turns out it definitely gives the OD channel more “bark” for lack of a better word; but the clean isn’t quite as full a...

Thanks Dan! As usual, I couldn’t have done it without you guys
Sounds like an exaggeration; but I learn a hundred new things every time I build one of these. This time was definitely educational.

My collection of random tubes is anything but matched, lol. I just try to get my power tubes closely matched and wing it with the rest. As for the choke thing - I hear you Martin. I’m always a bit skeptical of these types of things but I definitely heard a difference with this circuit. Over time I’l...

I had a feeling it was in my interpretation of the three references combined with the variables you mentioned - that’s why I kept reviewing and looking for possible misinterpretations. I remembered that I was confused by those connections initially, so I figured it warranted some digging before tear...