[sdiy] Re: P5

[Oakley Sound]

Hi Harry,

Many thanks for your reply.

> I just put a bigger heatsink on my P5 ...

Oddly enough I never thought about that, I guess I was looking for a more
refined solution to the problem :-)

The rev 3 heatsink is quite sizable really and miles better than the rev
2 which has nothing of course. But you're right a bigger one will
certainly help get it cooler.

In theory it should be easier than putting a second transformer into the
unit.

Incidentally, does your Prophet 5 tune up correctly with the tune pot in
the middle position? Mine tunes up so that the pot always has to be set
at around 10 o'clock to get A440. The internal A440 is indeed 440Hz, and
keyboard tracks wonderfully. The circuit that disables the tune and pitch
bend pots is working correctly, ie. its output doesn't change when the
tune routine is initiated with the pitch bend and tune pots are set in
their middle positions.

Beats me how mine is offset in this way. Surely, if the only common
things to all VCOs are apparently negated I can't see why its auto-tune
doesn't pull all the VCOs in correctly. Its like something common to all
the VCOs is acting on them once the auto-tune routine is finished.

Many thanks,

Tony