Unknown Ampeg Gemini modificationss

[Queen*Son]

Well I took the amp out anticipating a new tm1 for the tremolo and I wanted to look at some of the mods that were done.. of the 3 1/4" jacks 1 is for...

[clarisso11]

Hi everyone,

I've been attempting to convert a EHX LPB-2 power booster from the 70s to true bypass, and add a DC jack. I was hoping this would...

[clarisso11]

Hi everyone,

I've been repairing an Echoplex EP3, and after lots of help from this forum, I have identified a dead record/erase head as the...

[clarisso11]

Hi everyone,

I hope this will be a quick one for someone with experience working on tape echos:

I've been working for a while now...

[clarisso11]

Hi!

I've been working on building an amplifier head around a Blues Junior PCB I got for cheap some time ago. With the help of this forum and...

[gojirajesus]

Hi, I have a Session Rockette 30, a British solid state amp from a couple decades ago. In the last few months, I have noticed a consistent humming/crackling...

[clarisso11]

Hi everyone,

many months ago, I purchased an old Echoplex EP-3, in very bad condition. I took it apart and de-rusted/cleaned everything, exchanged...

[clarisso11]

Hi everyone!

I've been working on a Japanese made Boss DF-2 lately, and was hoping to get some insight from someone more experienced in electronics...

[clarisso11]

Hi all,

I've just come across this great forum, and was wondering if anyone could be of help with the project I'm working on.
I have done...

[simonflower]

Hello everyone, I’m Simon and I’m new here so I apologise if I do something “wrong”...
I just bought a Hot rod deluxe and it make a very loud noise...

[KM22]

Hi Folks,

Trying to fix up a WT-1000 with one noisy / blown channel. Can get signal through to speaker but no real gain and all distorted....

[ptaf]

Hi to all!

The above mentioned guitar amp was given to me for free. It is an old practice amp made by Fender in Mexico. Says model PR 241 on...

[Jesse Pearson]

Hey guys, I was given a blown up Ensoniq SQ2 synth to keep and fix. The SQ2 went out at a gig. I checked it out the next day and the screen still worked but...

[evil79]

Hey guys, been away for a while. So I have this Bedrock 1400 head on my bench. There's very little info on these amps, certainly no schematics that I can...

[Chodrick1]

I have a stock Mojotone 5E3 kit that I've assembled. It plays fine, but it's very, very clean. All headroom and no distortion. I can turn volumes and tone...

[nicksaysword]

Alright, so after testing out a bass guitar [an Ibanez] on this amp [Fender Champion 30] to make sure the bass guitar worked properly, the amp appeared to...

[Barnaby Jones]

Hello,
So I am attempting to repair an SVT-3 pro. I think the input jack was broken and just wanted to check it to see if the connection was intermittent....

[slidincharlie (Carlo P)]

G'day all
I have a '79 Fender Deluxe Reverb amp. The problem lies in the tremolo circuit (or so it seems).
The tremolo is on (optoisolator bulb...

[newlooper92]

I have just recently began to use the RC 300 loop station.

I had it working fine the first few times, now I have gone back to it, and the output...

[oldsmobuick]

I bought an older Fender Roc Pro at Goodwill that was blowing fuses and I have it apart now for troubleshooting. The C->E resistance on all 4 output transistors...

[ewd]

Looking for assistance for a KRK (Owned by Gibson Corp) Rockit 8 powered speaker. Trying to identify the two IC's (Amplifiers?) on the Main/Power Supply PCB,...