1971 Philco color Tube Hybrid

[old_tv_nut]

Does the service info give an adjustment procedure? It looks to me like there is a tuned output transformer that may or may not have much effect on the oscillator frequency depending on wha the internal IC output circuit is. Is that coil mentioned in the procedure?

[Lain94]

Originally Posted by old_tv_nut

Does the service info give an adjustment procedure? It looks to me like there is a tuned output transformer that may or may not have much effect on the oscillator frequency depending on wha the internal IC output circuit is. Is that coil mentioned in the procedure?

From what I have been able to deduce there is a varactor that is controlling and automatically adjusting the oscillator frequency in parallel with the oscillator itself.