Re(1): [sdiy] Crumar Performer - TDA1008 (was Keyboard assembly)

[jhaible at debitel.net]

I remember I've seen this some years ago.
VCAs may just be single transistors - emitter followers that cut off
the collector voltage of common emitter amps - but it's too long to
be certain. If you send out a pdf, add me to the list, too!

JH.



> Mike,
> It's a combination  keyer-divider chip - one is used for each note of 
> the upper octave - it divides down to get the lower footages for each 
> note and provides a VCA for each footage - a simple RC envelope 
> generator is connected to each control input to interface with the 
> keyboard. I can email a pdf if you want. It was a commonly used chip in 
> the late 70's/early 80's stringers. 
> Cheers, Mike
> 
> 




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