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NAD - vintage Ampeg!

Posted: Sat Oct 23, 2010 3:34 pm
by nbabmf
http://sandiego.craigslist.org/esd/msg/2014757732.html

Vintage 1970's Ampeg GT-10 solid state guitar amp in need of repair. I bought it used to keep in my garage as a practice amp. It had buzzing which I thought was due to it having a 2-prong cable and old caps. I replaced the cable with a 3-prong and recapped the amp. I was still having problems and upon further inspection I noticed one of the two power transistors had failed. I was able to removed the transistor, but damaged the PCB trace slightly getting it out. I was able to find a replacement transistor online, but the few shops that carried them had a $200-500 minimum order...

The Cabinet is in good condition apart from some faded punk rock symbols the previous owner drew as a youngster and some discoloring on the grill cloth. Comes with the stock 10" speaker, and reverb tank. Before I took it apart I had the chance to test out the speaker and reverb and they are both functioning.

I am not an amp tech, and have little amp knowledge, but I believe it would be a pretty easy fix for someone who has better access to parts. I do not have the time nor resources to try to locate the part, so I am selling it as is in a project form. - $50

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I found this guy's thread on TDPRI and did my research before I had him bring it by.

http://www.tdpri.com/forum/shock-brothe ... -hiss.html

I printed out a data sheet for a bunch of those RCA power transistors, and there's a surplus electronics shop about 20 minutes away that has a lot of them. I should have it running very soon!

Re: NAD - vintage Ampeg!

Posted: Sat Oct 23, 2010 4:44 pm
by Jero
Badass! $50 is great for a simple fix amp like that. Even has a little crass logo drawn on the top :p

Re: NAD - vintage Ampeg!

Posted: Sat Oct 23, 2010 4:48 pm
by tuffteef
even if you couldnt get it to work at 50 bucks thats awesome

worst it could turn out to be
is like a piggy bank or
hollowed out weed stash

Re: NAD - vintage Ampeg!

Posted: Sat Oct 23, 2010 5:46 pm
by Mudfuzz
Killer, hope you like the thing. :thumb:

Funny thing was what though when I saw the thread title was I thought "Huh, Nad hates ampegs... ":lol:

Re: NAD - vintage Ampeg!

Posted: Sat Oct 23, 2010 7:04 pm
by metalmariachi
Great find.
Those little things rock.

MM

Re: NAD - vintage Ampeg!

Posted: Sat Oct 23, 2010 8:44 pm
by nad
Huh?

Re: NAD - vintage Ampeg!

Posted: Sat Oct 23, 2010 11:46 pm
by nbabmf
Holy. Shit.

Loud, 70's rock in a small box!

Re: NAD - vintage Ampeg!

Posted: Sun Oct 24, 2010 2:15 am
by Mudfuzz
And you have to wear bellbottoms :thumb:

Re: NAD - vintage Ampeg!

Posted: Sun Oct 24, 2010 3:09 am
by metalmariachi
Do I still have bellbottoms?
I still have my leather rock star pants.
I seem to have misplaced the rock star body some where though.

MM

Re: NAD - vintage Ampeg!

Posted: Sun Oct 24, 2010 11:55 pm
by nbabmf
The reverb driver was the transistor that had been yanked out, literally. I replaced it with one from the same RCA series, just a little more powerful (potentially). There was some white noise in the background that was only noticeable when not playing, so I went ahead and swapped the other one out (the one with the square heat sink). The amp is now louder, a little bit cleaner when dimed but still nicely saturated, and very quiet in terms of noise.

:rock: :rock: :rock:

Re: NAD - vintage Ampeg!

Posted: Mon Oct 25, 2010 1:08 am
by kosta
I like this story.