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CP5176 FET compressor / Re: Failed sidechain check

« on: September 24, 2022, 06:40:39 AM »

Spent some time checking all components, reflowing a few points and added some electrical tape on the underside of the case where the front panel sits.  Everything works fine now.  Must have been a short somewhere. Setup was a dream and it sounds great!

Thanks.

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CP5176 FET compressor / Failed sidechain check

« on: September 23, 2022, 06:43:29 AM »

Hello, I just got finished putting the CP5176 kit together.  When I tried the set up it failed to change the output upon adjusting P6.  Input voltages are +/- 15.6V as expected and -5.45 V is measured at TP7.  Upon further investigation, the DC voltages check out fine at the test points of A to G. However,  I am measuring about 40 mV DC on L1.  The output AC voltages from TP3 are much higher than expected with a 100 mV signal at 1KHz. 

Outputs are as follows:
Ratio 2, 2.8 V
Ratio 4,  5.7 V
Ratio 8, 9.8 V
Ratio 12, 11. 4V
Ratio 20, 12.78 V
Slam, 12.8 V

No AC voltage can be registered for any ratio on TP4 or pin 1 of JMP1.

Looking for some advice where to look next.