Ctc 15 clone/Curtis Mathes C20 Horz output grid not negative.

[ZenithNut]

Hello guys,

I have this ctc 15 curtis mathes clone. It fires up with B+ and sound but the first grid of the horizontal output tube is not being driven negative. I checked the voltages on the horz oscillator (half a 6fq7) . The grid needs to be -100v.

When I got the set the horz waveform coil was snapped off so I bought one from Moyers and installed it. Would the new coil be throwing the horizontal off frequency to cause this or would this be something else?