Quote:
Originally Posted by miniman82
Yes, fun... that is, if you like long nights slaving over a hot soldering iron as I do! 
Wayne: unfortunately, the CRT has a little air in it. I borrowed Mark's CR-70, and though the filaments light up without burning, the gun gets a blue/purple glow when HV is applied (I powered it with my CTC-9 chassis for a test). This means it will likely need to be sent off to RACS for the frit treatment, which means big bucks. In the meantime, I put a 21FJP22 in it. That might have to come back out though, because I noticed the HV button fouls the CRT support (possible arcing issue). A 21CYP22 would make a better fit, so I'll probably swap it out later on.
Here's what the 21AXP22 looks like. |
Yep, sad to look at the thing and know it doesn't work. I have 2 like it, one which may have taken many years to develop a low level of air, and the other (in Bob's posession for now) that Scotty tried to rebuild, but showed air within a few days.
I am using the "rubber" shield from the 21AX to shield the HV button on the 21FB - can you slip that between your tube and your mounting hardware? Doesn't look elegant, but works, and can still be re-used if I get a good 21AX.