[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 !

Okay, so it seems I didn't change the tripler. I remember now, after finding it in a box, that it didn't match what was in the set. The one in the set has an input, ground and output. The replacement has an input, ground, focus, CTL and output. I remember hearing a sizzling sound and it was coming from the plastic piece that is fed off the anode on the CRT and then it feeds the focus and???? Anyway, I found a new one of those and installed it and the noise was gone and I just assumed the tripler was working properly. So if NTE526A isn't the correct one, what is? Or, am I supposed to do away with that plastic piece with all the connections? I've attached a pic of the current setup, but note the plastic piece in the pic is the old one. I couldn't find a current pic. The tripler pic is one I found on the web, but it is the same.

Thanks