Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: nateflanigan on February 07, 2016, 06:04:28 pm

Title: Bad Opto on Ampeg G-S-12-R Reverb Rocket
Post by: nateflanigan on February 07, 2016, 06:04:28 pm

Hello, I'm tuning up a vintage Ampeg G-S-12-R Reverb Rocket.  Aside from the usual maintenance the tremolo doesn't work.  I suspect the optoisolator has gone bad.  As with all things from this era of ampeg, it's a totally funky looking part.  Would I be able to replace this with the standard fender roach?


http://el34world.com/charts/Schematics/files/ampeg/Ampeg_GS12R_.pdf (http://el34world.com/charts/Schematics/files/ampeg/Ampeg_GS12R_.pdf)

Title: Re: Bad Opto on Ampeg G-S-12-R Reverb Rocket
Post by: DummyLoad on February 07, 2016, 08:20:58 pm

try this site.

http://www.fliptops.net/catalog/p-100087/tm1m1-r-tremolo-module-for-vintage-ampegs (http://www.fliptops.net/catalog/p-100087/tm1m1-r-tremolo-module-for-vintage-ampegs)


--pete

Title: Re: Bad Opto on Ampeg G-S-12-R Reverb Rocket
Post by: nateflanigan on February 07, 2016, 08:29:17 pm

Oh, cool!  That seems like the right track.