Hi everybody.

Recently I had the chance to buy a B&K 700 Dynamic Mutual Conductance Tube Tester in very nice shape (a nice addition to my...

Don't know if everyone but me already knew this, but I was struggling to do this and got a good tip and it works well, so thought I would share. I have been...

I just got a FB text and photos from a guy with two broken amps, a Crate and a Marshall. First question he asks me is do I have any idea what is wrong with...

I’ve been trying to work on and repair this amp for nearly a month, I had some help stating it’s usually the output stage and told to check the...

I have a Boss TU-2 that puts out a high pitched noise , not a buzz but more of a ring . It doesn't matter if it is off or on , plugged into bypass or output....

Friends....

I have another amp that I will be evaluating for my friends estate sale. This one is the Fender 75 tube amp. From afar, the amp...

This is an Atomic reactor FR amp that I have never heard of. The pre/PI stage puzzles me. I assume Q1 is a clean gain stage, and that it passes through C2,...

I'm relatively new to electronics and I'm trying to troubleshoot my Electro Harmonix Metal Muff. When the unit is on bypass, there's no sound. When it's...

I have this newish Laney on the bench with a blown HT fuse. Fuse doesn't look too bad with an open right in the middle, so I can tell it isn't defective and...

Hi chaps- got a reverb gremlin in my AC15 TB I wonder if anyone can shed some light.

I get the reverb happen 1 strum in 30 lets say. So its on,...

No power on this one. Wasn't able to locate a schematic. I believe I remember it had some voltage readings from transformer. Would appreciate some help getting...

Powers on, no output. Old project. Recall tracing voltage from input. Not able to find where it stops?

I did it again. A relapse. I picked up this Silvertone 1300. Apparently 1949, but I haven't looked close enough to verify the date. Here are some pics....

MEF members...

Anyone have a schematic for the Randall Switchmaster 150, AKA "RSM-150"?

This is a two channel amp. Both...

It's big. It's heavy. It has lots of tubes. It was cheap. I understand it's a 200 watt bass amp. Any love for these?...

Hello, I am new to making humbuckers. I've made maybe 5 or 6 so far. I just need some peace of mind that I'm wiring them correctly.
They aren't sounding...

https://elektrotanya.com/gallien-kru.../download.html

Hey y'all,

Got a GK RB1001MK II with no output, but also...

Hi chaps

the good news is that my rebuild of the BS ht-60 is virtually finished. Everything is working.

the only remaining issue...

Hello all,

I'm having an issue with a humming Vox AC30 6TB. It's one of the reissues from the 90s with a tube rectifier and vib-trem switch....

I'm working on a Peavey Bass 300 from the early 70s. It seems stable when turned on and no load is connected - on a bulb limiter, I've got a stable dim glow...

I have a Baldwin chassis with power and output transformer. It originally had four 12AX7, four 6BQ5 and a 5U4GB. It also had two output channels but I have...