[TinCanAlley]

Originally Posted by zeno

The ABL runs off the reference pin of the tripler IIRC. Its the pin
with the big resistor & is just above ground to produce a small voltage
that varies with beam current.
With a good CRT as a rule G2 pots start to show a line at abt 1/3.
You need good boost IIRC between 800 & 1000 VDC. If thats OK
look back to to the G1 & K's. A bad boost filter will lower the boost
& leave unwanted crap on it.
I really suspect the tripler. Its the common link between the sets.
There are resistors, caps & diode stacks in them that may vary in
value from the OEM tripler.

enuf fer now, time for a beer. Or 2 or3............

73 Zeno
LFOD !

The way the tripler is in this unit seems a bit different than any I've seen before, but that could just be my limited exposure.

The trippler has an input and an output. The red output goes to the suction style cup on the CRT. That connection at the CRT has a second pink lead that goes from there down to a plastic distribution block. It then breaks out to two more leads. Once goes to the focus and the other attaches somewhere around the flyback and I believe then routes to the CRT socket. I could be a little off here as I haven't opened the set for a year and I won't be for about a week or so.