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Still needing a amp repair shop for 1956 GA-6

GuitarDean

Active member
Joined
Aug 5, 2002
Messages
3,678
Still needing a amp repair shop for 1956 GA-6, hopefully in the midwest. Pretty much everything in the chassis is shot. I have bought all new tubes for it and the Jensen speaker is fine, but I'm guessing just about everything else is shot. So needing all new components
 

zacknorton

Member
Joined
Aug 26, 2011
Messages
524
where in the midwest? Casey Gooby in Mpls is TOP notch. and extremely reasonable.
I would trust him with any of my vintage amps. no question.

Kris at twin town is also a deep diver into vintage amp repair and reconstruction.
 

MapleFlame

Active member
Joined
Jul 3, 2005
Messages
14,011
Still needing a amp repair shop for 1956 GA-6, hopefully in the midwest. Pretty much everything in the chassis is shot. I have bought all new tubes for it and the Jensen speaker is fine, but I'm guessing just about everything else is shot. So needing all new components
What does it need work on? I'm pretty sure you can do all of the work yourself. There are so many videos on how to repair these amps. I've replaced many caps and resistors on my GA amps. Many guys as well as myself on this forum could help you out. All you need is a simple soldering iron, needle nose plyers, solder, sponge and some deoxit pretty much. We can walk you through where to order the parts
 

AA00475Bassman

Well-known member
Joined
Apr 26, 2016
Messages
3,247
My 57 GA9 is one of my favorite amps, I would never consider attempting a repair .

If you have to be coached to do the repair that should be enough incentive to find a PRO ,
 

El Gringo

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Joined
Apr 8, 2015
Messages
4,094
My 57 GA9 is one of my favorite amps, I would never consider attempting a repair .

If you have to be coached to do the repair that should be enough incentive to find a PRO ,
Way back in the late 90's I got a wild hair on my fanny and thought I was going to do a re tube and re bias on my old Pro Sonic and after I read up a bit I decided against that . Tricky part for me would be to make sure to "drain " everything then that way I wouldn't get zapped or electrocuted . Scary stuff !
 

Wally

Well-known member
Joined
Feb 27, 2003
Messages
3,287
Way back in the late 90's I got a wild hair on my fanny and thought I was going to do a re tube and re bias on my old Pro Sonic and after I read up a bit I decided against that . Tricky part for me would be to make sure to "drain " everything then that way I wouldn't get zapped or electrocuted . Scary stuff !
The ‘trick’ there would have been that in order to bias the amp, the amp would have to be in operational mode....live circuit...electrons flowing. Draining the electrolytics would have nothing to do with retubing and/or rebiasing that or any other amp. (;^)
and....with the Pro Sonic, one could simply run it in cathode biased mode until one got the amp to someone who could bias the amp in the other two modes which are fixed biased and act differently. One has to take measurements and make the bias adjustment with both of those circuits in mind Since one mode runs at a higher plate dissipation than does the other at whatever bias voltage one sets the adjustment.
 
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MapleFlame

Active member
Joined
Jul 3, 2005
Messages
14,011
My 57 GA9 is one of my favorite amps, I would never consider attempting a repair .

If you have to be coached to do the repair that should be enough incentive to find a PRO ,
A 56 GA-6 is about the simplest amp you could ever work on. I currently own a 55 GA-6 and 56 GA-20. Did all the work on both of them. If we had a picture of his amps innards, obviously that would be a start. Not Rocket science. I'd even offer a Zoom call and show on my amp everything to look out for. If your Talking Vibrolux Reverb, 59 Bassman or the like, yes an experienced amp guy for sure. The electrolytic caps usually are the culprit in these amps and some resistors will drift.
 
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