Help testing a 15GP22 from RCA CT-100

[Radioman237]

I need to test a 15GP22. I have a B & K 455 tester. I'm going to make sure the tester works first. Then I suppose I'll have to make an adapter with alligator clips. There is no data on this tube in the chart. There are three settings for for G2. So if anyone is familiar with this tester and can offer any advice or detailed instructions that would be a great help. I have already been told not to attempt any rejuvenation.

Robert Ramirez

[dtvmcdonald]

Each gun of any roundie P22 is the same as a gun of a standard 21 inch B&W of the same era. This includes the 15GP22. But you have to check and be careful that the tester generates the correct filament voltage with the tripled current. Even if the red gun tests 1/2 of the others it will produce an accurate if dim picture.

Do note that with these old color crts its best to run the heaters at least 30 minutes before starting testing the emissions, and watch each gun for 15 minutes under test
to see if it wakes up. If the red gun wakes up in 15 minutes its a winner.

[Electronic M]

My B&K 466 uses the same settings for most guns (including the 10BP4, 15GP22 and 21AXP22). On my 15Gs I have used standard settings and a home made single gun adapter with clip leads leads for heater, K, G1, and G2 and tested one gun at a time successfully.