Predicta Holiday - First power up attempt

[madlabs]

OC, without the CRT connected it makes no difference. With the CRT connected, IIRC, there is a high pitch whine at either end but not sure what the hum does. I can reconnect the CRT and and see if needed.

[old_coot88]

The idea was just to see if the hum might be vert sweep bleeding into the audio. But since the pitch doesn't change with varying the vert sweep rate, that's not the source of the hum.