Finally finished Dual G1176!

This thing sat around for months after being half built. Then after I got the first bee up my butt and nearly finished it, one of the FET's failed in one channel so it sat around for a few more months as I occasionally took it out and looked it over with a magnifying glass, gave up and put it away.

Finally with gswan's help, the gain reduction FET was determined to be the problem. Luckily I had a back up pair of FET's from my matching session. Those solved the problem and like a miracle it was actually very easy to calibrate both the Q bias and meter tracking. I must have done a pretty good job of matching.

It sounds awesome.
Thanks Jakob, Mnats and Gswan!

Here's some pics:
http://img14.imageshack.us/img14/2474/1176frontside.jpg
http://img530.imageshack.us/img530/9179/1176front.jpg
http://img530.imageshack.us/img530/8886/1176open.jpg
http://img12.imageshack.us/img12/2503/1176backopen.jpg


I used Nichicon PW's for the lytics, Wimas for the films, PM1000 meters, OEP in and out transformers, and par-metal case. The front panel was a bitch to drill, it's so crowded.  Took awhile to figure out how to measure so everything would fit.  I also added a switch to switch between the input transformer and the IC balanced input. Works quite well. It's a 4 pole switch, switching between both the input pot and input connector locations.

Looks awesome! Wish I had a dually.

Wow cool! Nice job. My next diy is a dual preamp and a dual 1176. Congrats on a great build!

John

That´s beautiful !

happy squishing!

congrats,
christoph

nice job
happy compresing
puc

That's totally fantastic!  This is on my short list for '09, any advice?

Great comp build. You will enjoy the process of processing audio so much when you feel the sense of pride in building the unit.