noise of arrays
jocke at netcontrol.fi
Wed Jan 24 11:37:39 CET 1996
On Tue, 23 Jan 1996, Don Tillman wrote:
> substituting the 3086s for BC109s, but for some reason it didn't
> work very well. I'm not sure, but I probably used BC109Cs, which
> have a much higher beta than the 3086.
> Did you match the transistors? I can imagine that the sound of this
> circuit might be suboptimal if the transistor pairs weren't matched.
I don't remember the details, but I think I used only two stages
for testing the BC109s, and I seem to recall that I matched them
(for Vbe, not for hfe). The whole thing was hastily built on copper
strip board, so there's a great chance that something else went wrong.
More information about the Synth-diy