Two more JH VCHADSR

[jorgen.bergfors at idg.se]

Hi DIYers!

I have just completed two more copies of JHs envelope generator, with my punch feature added.
I compared the minimum and maximum times, by connecting both to the oscilloscope channels. You will only see one curve on the screen! The maximum attack was 1:46 and differed only 4 seconds.
There was no visible difference on any of the minimum times. I triggered both from the same LFO, and watched the entire ADSR-curve on the screen.
When I controlled both attacks from the same CV, and varied it, there was some difference. Between 1 and 50 ms the maximum difference was 1 ms.
This was without any trimming whatsoever. I have replaced all trimmers with fixed resistors. I have matched the transistors, but not the capacitors or resistors.
Needless to say, I'm very satisfied with this circuit!

/Jorgen