[sdiy] Octave Cat modulation weirdness

[rsdio at audiobanshee.com]

Your description implies that you did some soldering. Did you clean the flux off the board afterwards? I'm not sure that flux could absorb humidity, but perhaps.

Brian


On Sep 30, 2015, at 10:58 AM, Travis Thatcher <recompas at gmail.com> wrote:
> I recently restored an Octave Cat SRM and it was working pretty well.
> I replaced nearly all the CMOS and recapped somethings. The only thing
> I couldn't perfect was the scaling when you switched from mono to poly
> mode but that didn't bother me - just meant I had to adjust the tuning
> of osc1 by a step.
> 
> The weather here in central VA as well the rest of the Eastern US has
> been a bit humid to say the least. Yesterday I fired it up only to
> find that osc 2 is constantly getting an amount of modulation from the
> LFO, even with the modulation pot turned completely off. I checked and
> leg 1 of the pot still has continuity with ground. I'm guessing a cap
> some where finally bit the dust, maybe egged on a bit by the humidity
> in the house. Just curious if anyone has seen anything like this. I'm
> going to open it up tonight to investigate.