[Dave A]

I did the test tonight with mixed results. If you go by the pinout and connect the leads (all K leads go to one pin and all done with a clip lead adaptor) to connector #1 on the Beltron, it showed good emission but a bad life test connected as if it was a full RGB CRT test at 13.8v

Using the G1 cleaning only #2 connector on the Beltron I got a very bright light on the R gun but nothing on the B/G lamps.. The R seemed to have a good life test after this first all-gun cleaning. The others were as before cleaning.

I then tried to isolate the guns via the filament taps available on various pins. The filament is series at 13.8v for all guns but there are pin taps for each gun. That would make each one 4.8v or so. I then tested the B/G guns one at a time as if they were a BW tube with only the proper B or G connections to the pins and the Beltron and did the cleaning again on those two to match what I thought was a good R attempt. It seemed sucessful as the life test now was in the 20 second range. More that fine.

But assembled, the set acted funny. The B/G guns came right up to the usual miserable Portacolor-DC restoration lacking-pic. The R lagged behind by about two minutes to get up to speed.

I am wondering if my first full attempt at 13.8v really did nothing for the R gun despite the bright lamp indication and I need to do the BW version on that gun. The end result is that this tube can be done one gun at a time via clips in the BW mode. H/G1/K.

Most GE tubes show a date code of 188-5. Probably original. No suspicion of bad caps yet. Time to re-tube and find the focus pins next.