I ve finished my builds. They are working pefectly.
Some things to mention:
-do not use IC Sockets for the two LM3914 VU ICs, it is to high at the end
-Calibration was not 100 Percent clear, so I did set the Thresholdset similar to a 1176 Calibration -> 0,86 V 1kHz SineSignal +1dBU on the Input, Max Ratio, Thresholdpot to 0dB, and set the Pot near the AD536 till on the Output was reached a 1dB Drop to 0,78V. Thats it. GR shows exactly halving the I/O Voltage 6dB GR on the Meter.
-Symmetry Pot - I did the adjustment with the the DAW Analyser, I matched the Spectrum between my two Units as similar and low Noise/Harmonics as possible by using also a 1kHz 0.78V Sinesignal. This Pot has a big impact on the sound in my Units. I also could lower the Outputlevel by to achieve nearly Unitygain between my replacement INA137 Input-Receiver (Instead of the That1246) and the original That 1646 Outputreceiver. The Window where this Symmetry Pot works perfectly is very narrow and can give enormously Stereoids to the Soundimage
Excellent Build, the Compressor sounds nice, the Gate is excellent - awesome musically....