Hello everyone,

I’ve just repaired a vintage Standel Custom 30 Bass amp. There’s a disc-shaped component that was heat-epoxied to...

Hello All. Someone asked me to fix a Vox DA15. It only turns on power LED. No function beyond that. My conclusion is that the logic functions aren't functioning....

I have found a list of Peavey transistors with in house numbers, alternate in house numbers, field replacements, and notes
https://www.google.com/u...

To start I hope that a good amplifier tech can help me out here to eliminate any confusion I would love to go through the amplifier with you on the phone...

Greetings,

I have an old PA amp that uses 6SJ7 preamp tubes that I’m tweaking for guitar use. It has three essentially identical channels....

Hello,
I own a nice hiwatt sa112. It's a combo, with the same schematics than the head hiwatt dr504.

I was playing it fine, then suddenly...

So I have a Martin with a Fishman Classic 4 preamp module in it. When I plug the cord into it, the led flashes but then goes off again and the only sound...

This one has me puzzled. Currently I have all new tubes in the amp, 12ax7 and el34. The last time I worked on this amp was 5 years ago, and it's been good...

Can't find a clear or normal size BE 100 scem ...just fuzzy/tiny. Anyone got a clear one ??

Hey folks,

I managed to eliminate the hum by replacing the main filter caps, but now I'm getting heavily distorted output. Traced it down to...

All I have is a multimeter
https://photos.app.goo.gl/Z9d1CpHdqSWT4vTm8
Here is a data sheet for the part
https://www.google.com/url?sa=...

Does anyone have ideas on how to fill in the missing white paint on this faceplate?

...

Hot Rod DeVille. (This amp does not have heat damage of the low voltage circuit. Both supplies are fine. )
Came in with no reverb. Distorted output....

I need someone who can rewind a transformer for me.. I am down to ship internationally.

(To anyone else who needs one rewound, never assume your...

In the screenshot below I have two identical LTspice circuits that are basically a tubescreemer type drive stage.
The only difference is the first one...

Hello Everybody,
I'm attempting a fix on a preamp made by LR Baggs that is in a Godin Acousticaster guitar. It was brought to me with a noisy volume...

This is the 120 watt unit.

Got this JSX with audible hum and is showing 120 Hz hum on my phone spectrum analyzer. It is present with no input...

Hi all,

Was hoping to get some insight into what might be going on with this Marshall JCM2000 DSL100 I am working on. I took the necessary steps...

Working on a "77 Peavey Classic 212 that cuts out with a pop once in a while in both channels. It has only done it maybe 3 or 4 times, but I have confirmed...

Thankfully to X-pro I have found replacements for these parts.. I still don't know how to test them I really need help with that...

Looking for a 1Meg audio pot with rotary switch to use as an on / off power switch and volume control in a modified Blues Junior.
I found an Alpha with...