Print Page - Vox Cambridge 15 Hybrid (Korg)

Title: Vox Cambridge 15 Hybrid (Korg)
Post by: Gomez63 on January 20, 2015, 04:01:45 PM

I just had a a (Korg) Vox Cambridge 15 roll into the shop, but do not have a schematic or service manual for this specific unit. It has very low output and the clean channel is pretty distorted....unless the tremolo trim pots are tweaked, then the amp comes alive for a few minutes and then back to crud it goes. I'm leaning on the thought that the vactrol is shoddy, but would love a schematic/service manual or input.

Title: Re: Vox Cambridge 15 Hybrid (Korg)
Post by: Enzo on January 20, 2015, 11:52:27 PM

My schematics are not near, but isn't the C15 like the C30 in most rgards?

In my experience with that series, I think you are right the opto is the problem.

Title: Re: Vox Cambridge 15 Hybrid (Korg)
Post by: Gomez63 on January 27, 2015, 03:11:46 PM

Thanks Enzo. I pulled a copy of the Cambridge 30, but didn't even bother with it. I traced the problem right to the opto isolator...which I replaced with a better unit and the amp is alive and kicking.

Title: Re: Vox Cambridge 15 Hybrid (Korg)
Post by: J M Fahey on January 27, 2015, 05:57:23 PM

Cool :) :dbtu:

Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Tubes and Hybrids => Topic started by: Gomez63 on January 20, 2015, 04:01:45 PM