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Moving along, here's what I'm going to do:
LM353 to LM6172
5534's to LT1357
VCA to THAT 2180
Replace coupling capacitor (C14? I'm 95% sure) with Wima 4.7uF MKS-2, bypass with MIT .01uF PPMFX
Increase size of power supply capacitors, bypass with WIMA MKS-2 .01uF 250V
With the new op-amps I'm sure I'll have to do some power supply decoupling caps for the op-amps (it looks like they are already installed by DBX) and a small cap across the feedback resistor of the opamps.
If anyone wants to explain changing the diodes to LEDs I'll give that a try.
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