[sdiy] Transistor questions

[David G Dixon]

So, I just now tried to calibrate the VCOs, and they calibrate very nicely,
and it doesn't seem to matter whether I use the 3904/3906 pair or the
945/733 pair.  My frequency meter is on the fritz, so I just did it by ear,
and both VCOs were tracking octaves all across the audio range.  I was
listening to the lowest of the four octave outputs from the VCOs (the one
that has been divided down three octaves), and at the highest frequency, I
was hearing notes near the top of the piano range, and they were in perfect
tune (by my ear, anyway).  This means that the actual oscillator was
generating frequencies in the range that only dogs can hear, and it was
still tracking perfectly well.  When I feed the VCOs a lower CV to put them
in the proper range, then they should track even more perfectly.

I'm going to consign this whole episode to the "works perfectly, no need to
worry about it, proceed accordingly" file.