Dear People,
I hope you are doing well.
a few days ago i finished puting a pair of CP554s together.
I enjoyed a lot the process; Thanks JPK for making this possible.
I think both units are doing well and I calibrated as mentioned in the guide.
A little Burn in time I started testing.
I realised that even at 0.5ms Attack my CP554s fail to catch a lot of peaks.
Out of curiosity I did a test.
The test I did is not "super" precise!
I recorded a Sine Wave with 10dB of gain Reduction at different Attack/Release settings and then by reading the waveform i decided where Attack and Release starts and ends.
This is what came out:
Gain Reduction 10 dB/Ratio 3:1
Attack 0.5ms: 10ms - Release 400: 360ms
Attack 1ms: 25ms - Release 400: 300ms
Attack 2ms: 31ms - Release 400: 260ms
Attack 4ms: 97ms - Release 400: 230ms
Attack 8ms: 142ms - Release 400: 300ms
Attack 16ms: 175ms - Release 400: 360ms
Attack 1ms: 15ms - Release 100: 150ms
Attack 1ms: 13ms - Release 400: 270ms
Attack 1ms: 25ms - Release 800: 585ms
Attack 1ms: 22ms - Release 1500: 2200ms
Attack 1ms: 35ms - Release A1: 550ms
Attack 1ms: 10ms - Release A2: 2900ms
The Attack Values I recorded are off by factor of 10-20 compared to the Values on the Faceplate.
This seems to be a lot and maybe I messed something up?
If this behavior is
normal; is there a way to speed up Attack times?
FYI: to spice things up and making the learning part a bit more fun i swaped out some components.
Resistors: Most replaced by Carbon Film Resistors (same Values but twice the wattage 0.5W instead of 0.25W/2W instead of 1W)
EL Caps: Most replaced by specs except for Voltage sometimes (example:1000u-35V replaced by 1000u-50V)
Tantulum: original
Ceramics: original
Film Caps: original
Opamps: Sparkos
Thanks a lot
Stay safe
