The Amp Garage

desertmouth90 wrote: ↑Fri Sep 18, 2026 9:46 pm I bought a tonne of that 20awg solid core wire and the coating is laquered. It doesnt bend and i cant push it back to wire up!

Sell it on eBay and get something better.

I have a 50w one I used single core cloth wire in that I feel is more stable somehow, im torn between silicone strand wire and single core! Solid wire is more likely to break with excessive flexing and this can include excessive movement due to vibration while using the amp. Stranded wire is typica...

Nice! I love it when folks build modern versions of classic gear like the Leslie. I - being the snob I am - would have used a 12" speaker and a 40 watt or more amp even knowing the cab would be bigger. FWIW, I also wondered about his idea to pair an 8" speaker with a 10W amp. He says it's for livin...

Just finished watching a minute ago and thought to come here to post it. Not surprised someone else got here before me. It's a very interesting video and I thought the last segment where several guitar players try it is a lot of fun. My general impression is that, while it might benefit from a few t...

Many thanks for taking the time needed to document your progress. Kinda plain for what I've seen you do but elegant nevertheless and your attention to detail is excellent. BTW, I am a big fan of people who know how to undrill a hole that's too big or in the wrong place

Russ, sometime you might look at trying pine stair treads, 11" wide, made from 4 pieces of glued up pine and covered with a pine veneer. They are true 1" thick. Come in 36" and 48" long. The ones I've seen look to be dead flat. At about $14 (36" or $17 (48") they are priced similar to Radiata pine ...

Russ, sometime you might look at trying pine stair treads, 11" wide, made from 4 pieces of glued up pine and covered with a pine veneer. They are true 1" thick. Come in 36" and 48" long. The ones I've seen look to be dead flat. At about $14 (36" or $17 (48") they are priced similar to Radiata pine a...

Nice wood. No pith. Looking forward to seeing the result.

Watch this...seems to be a similar situation.
https://www.youtube.com/watch?v=EW7hmGPvPH4

I believe the schematic shows 3 parts to the optocoupler. U5 is a 24 or 28V incandescent light bulb, unknown current rating but certainly not very high, maybe 40mA. 150 indicates there is a 150Ω resist0r between the U5 bulb and the LDR. There is no specification for the LDR (light dependent resistor...

It's a crappy design. This amp shares it's topology with other Gibson/Epi amps of the period. I suspect they were chasing clean tone, but the pubic rejected their idea of it. We know this from numbers manufactured and that they never were very sought after. Because the amp sounds like poo, I suggest...

Go browse eBay for a used electrophoresis power supply. Cheap as dirt, adjustable, regulated 0-500VDC power supply, plenty of current. Most are not particularly clean for powering an audio amplifier, but they are plenty good for testing capacitors at voltage and applying a re-forming voltage with v...

Thank you for the replies. I see the best course of action is to recap each amp, or, pull the caps and reform them out of circuit. I have a pile of NOS good quality caps that I could start to reform for the cap jobs. If these turn out bad, I can purchase what I need. I'm mostly retired at this point...

I've searched TAG on this subject but only found a partial answer. What I found is not new information -- that e-caps can be reformed, but the discussions all suggest this is done one cap at a time while the cap is not installed. Over a period of several years, I was actively building. After about 1...

I don't remember how I got subscribed to "All About Circuits" and most of what I see is way over my head. Once in a while, there is a nugget. This article is a retrospective on the LM386 chip, invented in the 19070's, any how/why it has endured. I think you'll enjoy it and it's a very quick read. ht...