sry, i should have specified "h hold"
turning that control will vary the frequency of the horizontal oscilator .
just for "fun" ....
another way to get the frequency close is to remove the sync input and allowing the horiz/vert sections to free run .
then adjust h and v hold controls for pic to roll as slowly as possible .
reconnecting sync at this point should cause immediate sync lock.
tnx for posting your results

qrz