Hey all. I have a Vox Tonelab SE pedal board thingy for repair. A lot of the switches are no longer working.

I found the reference for the main...

Hello there,

Im building a little Vox treble Booster clone.

The pedal is working fine when activated BUT the Bypass signal is non...

Newbie here and to pickup building. I teach high school physics and engineering and I've got my kids making automated pickup winding machines. I've been sourcing...

My brother gave me a JVC-B99 radio he bought years agp. The vol and subwoofer vol are encoders. When an encoder gets touchy what options are there before...

So I have this old Marshall 100 power trans that I thought was bad, the filament center tap was shorted to the the mounting bells.
All the other taps...

I am having a heck of a time removing the heatsink screws from the Ampeg SVT 4 Pro that I am working on. The screw is black oxide with a tiny button head...

Hi folks !

Simple question, maybe already answered but can't find it...
How To calculate the Bias of a Transistor amplifier ?
...

Not sure if Peavey does this in other models, some of you may have dealt with it before.
Peavey flips the wiring on one of the (two) amp outputs. That...

Can anyone tell me why the electrolytic capacitor (10uf / 35v) on the drive opamp output is wired backwards.
I was under the assumption that the + should...

Hello, I would like to invite you to watch the music video P.O.R.A. Maksym Teper Aeris - Cosmix Album. Link in description video. ​
...

This amp has an odd issue. Owner said it is cutting in and out and also signal strength drops. Issues on both channels.

I plugged a 1K signal...

I'm leaning towards this being a R-12-R, apparently there are different output versions​, this one being a 6V6. Odd that there is no model number under...

I've got a metcal solder station fot sale . I'm askin 300 new wand and stand and 3 barely used tips.
I am open to reasonable offers.
nosaj

Considering Rod Elliott's diagram regarding mixed-mode feedback: When applying this to an existing amp, what's the calculation in order to maintain roughly...

Ive been searching for a long time for this pot....Mouser, ebay , google, etc.... i just need something pretty close or I will have to mod the pcb,,etc..They...

Hi, love this forum and the helpful information - hoping for some pointers for my DDX3216 audio issue.

I bought the unit very cheap about 12...

Has anyone done any tweaking to the overdrive channel of this amp to make it usable?

I want less shrill highend,more lows,and less gain....All...

Thanks, guys, for all the help imagining the Eric Barbour one-tube 6BM8 reverb.

Here's the reverb circuit inserted into a Champ 5F1 circuit....