VHF Tuner Alignment: where is the overall oscillator adjustment?

[old_tv_nut]

I believe any tuning to make the oscillator and burst inputs to the phase detector *equal* amplitude is irrelevant. The important thing is that both the oscillator output coil and the burst input coil are tuned for maximum response at 3.58 MHz. Unlike the oscillator zero beat tuning, these two are relatively broad peaks of the resonances whose purpose is to get maximum input to the phase detector from both the burst and the oscillator.

[LukeSimon]

Originally Posted by old_tv_nut

I believe any tuning to make the oscillator and burst inputs to the phase detector *equal* amplitude is irrelevant. The important thing is that both the oscillator output coil and the burst input coil are tuned for maximum response at 3.58 MHz. Unlike the oscillator zero beat tuning, these two are relatively broad peaks of the resonances whose purpose is to get maximum input to the phase detector from both the burst and the oscillator.

I guess I just didn’t realize that burst and oscillator waves were entering the phase detector 180 degrees out of phase with each other. So I thought peaking the transformers would pull the test point voltage in the same direction for both, and therefore I am pretty sure I tuned the burst transformer for the minimum resonance.