Saturday, September 4, 2010

Uncertainty - Buchla SOU Build

Lots of it unfortunately as I'm having some problems getting these working

I had these populated boards floating about in my studio for a few months before assembling the module. I hope that i havent zapped the CMOS IC while haphazardly moving them from pile to pile. I should be more careful with these things. Hopefully i can work out the problems reasonable quick

The 555 timers in the FRV dont seem to be responding to the manual control which uses a vactrol to vary the RC timing circuit. It seems to pulse about every 12 seconds with no variance.
Frustrating problem as i can't work out where the problem lies.

The QRV board is waiting on some 4006s. I had a 4066 installed accidentally. Luckily someone came to my rescue as they are really hard to find these days. Thanks Tom.

SRV is somewhat functioning but i question the output so it might need a few tweaks.

These are definitely the most involved boards that ive had to etch and populate so I guess that assuming that these would come together really easily was wishful thinking. The etch of the pcbs and population looks super clean so I can only assume that there is some component failures.

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