[sdiy] jörgens tri vco-bcv62

jorgen.bergfors at idg.se jorgen.bergfors at idg.se
Mon Jan 27 13:34:00 CET 2003







>know i wanted to know how i can change the frequency range, because with
the
>values shown on jörgens site it does not go under 1Hz and i also want to
use
>it as vclfo.

Hi Chriss. If it doesn't go below 1 Hz, the PNP transistors are
unfortunately not matched well enough. Mine goes down to at least 0,1 Hz
with hand-matched BC560C.
With some pairs that I tested, it would not even make 25 Hz though, so it
very much depend on the transistors.
If you only want the LFO range, you can change the 4n7 capacitor to
something bigger.

/Jörgen
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