TTSH, Arp2600 Clone - Calibration Procedure

Calibration, engage!

Hooked up my half-baked TTSH to a frequency counter (currently reading 440Hz), multimeter, laptop & my new Hameg scope (using a pair of custom 3.5mm audio-jack probes I DIYed and got ready to calibrate some serious shit today.

The procedure is pretty straight forward: First adjust the ring modulator. Then the three VCOs - V/Oct calibration was unexpectedly swift, calibration of the waveforms differs for all three VCOs, #2 is quite tricky...

Filter & Clock calibration were quite easy, but I think that I'll have to do some experimentation on the settings for the VCA, especially for the exponential gain circuit which tends to overdrive the machine quickly.