[sdiy] Octave Cat modulation weirdness

[Travis Thatcher]

I didn't do a lot of soldering however I did clean my work with the
rubbing alcohol. The odd thing is that VCO 1 has everything working as
expected. The modulation switch works as well for VCO 2 - changing the
modulation from sine to square to s&h.

On Wed, Sep 30, 2015 at 2:04 PM,  <rsdio at audiobanshee.com> wrote:
> 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.
>



-- 
http://www.travisthatcher.com
http://www.soundcloud.com/thevoiceofsaturn