CT-100 -> TV tuner

[dtvmcdonald]

I tried the alternate tube yesterday. It worked in that nothing overheated and the
voltage generated was down nicely. Unfortunately it was down to 1/3 or thereabouts,
which surely generates sync/AGC/color killer pulses that are too small.

Another method, after looking at the tube curves, is to cut the screen voltage.
The waveforms I saw on both tubes were clearly "switch" action, i.e. Class C
operation. Thus, cutting the screen voltage is just like screen modulation
of a Class C AM radio transmitter and should work nicely. Only a modest cut is needed. The chassis has to be removed anyway to properly install a new fuseholder in the power supply area, so I'll add a power pot on a temporary bracket.

[jr_tech]

Could you wind a custom pulse transformer with no HV windings and a more favorable ratio for the pulses that you need?

jr