Re: Bush TV22 with TC184 B3 converter.
Hi Peter,
The negative going pulse is the waveform that's always present at the anode of the blocking oscillator irrespective of there being a sync pulse or not.
The blocking oscillator requires a positive sync pulse at the valve grid to initiate the flyback. A negative sync pulse can be applied to the anode and the transformer will act as an inverter so that the valve grid receives the positive sync pulse.
DFWB.
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