[sdiy] Dual Vactrol matching

[Paul Perry]

I'd be astonished if they were better than 10%.
Because there is variation in BOTH the diode, and the LDR pairs.
I think you might be able to tweak them to match within a few percent using
level and gain changes, as the shape of the transfer function would be very
similar.


Paul perry Melbourne Australia

-----Original Message-----
How well do the two units in a dual vactrol like VTL5C3/2 match?
Is it feasible to use the second half in a feedback loop to force the 
first half to known resistance?