Sound Skulptor forums
Build help and troubleshooting => CP554 Diode bridge compressor => Topic started by: AcdNrg on January 06, 2023, 06:08:41 PM
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So on my 2nd instance, the assembly worked a lot easier already :)
However, it seems I can´t get the 0dB trimming (setup step 7) done: Output won´t get below 1.2x VAC on an input of 1.0 VAC.
Best I can get is 1.0005 VAC bypassed to 1.1224 VAC active
Yes, Gain is at 0dB and I can identify different outputs as per gain stage. However, maximum output is lower than expected, ie 6.480 VAC @20dB and 6.707 @22dB compared to the 12.5 to 13 VAC given in the setup docs.
What are the things to look at?
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So after careful inspection of all soldering joints, I found the black transformer cable to look fishy. Did a reflow, everything is golden now.
What bugs me a little is that my chassis (WES Audio Supercarrier II) does not seem to carry the stereo link signal. I may swap all sorts of modules to move my CP554 pair to the Neve R10, but this messes with the functional layout I had in mind.
I wonder is a switchable stereo link can be done by simply getting a 1 slot frontplate, drill a hole for a switch and connect both pin6 to it?
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It must be possible to link the 6th pins of 2 adjacent slots by soldering a wire on the lunchbox motherboard. The API lunchbox has special pads for that. No need for an additional switch because the compressors have one already.