26-09-2016, 09:06 PM
Photo would be useful to help us identify what's going on. Doesn't sound like the classic Dave Looser or JB type of design which use 2x 1496 balanced modulator chips. One each for sound and vision. I wonder if it could be close to Darius's circuit which I've attached.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv







