RCA CTC...Something? poor HV output.

[Arcanine]

I'm starting to think my HV probe is lying to me.



I swapped a couple tubes tonight with the CTC20 just to see, and I swapped in my NOS 1V2 focus rectifier and this is what I saw when I went around to the front of the set. A little tweak to the focus adjustment, the picture is razor sharp, my camera won't even catch how sharp it actually is.

This is the first time it's ever given me a color image.

It's also very bright and clear. I let let it run for 10 minutes on the dot and shut it off, and checked the fly, and it wasn't even warm.

I'm starting to think it's not the fly and more dead caps. It refuses to fill the screen vertically, and when no color is present, the image still looks yellowish. As soon as color pops, it looks good. It has full horizontal and locks on with out much fuss.

[rca2000]

I TOLD you...you were NOT that low on HV...now I am SURE of it !! That pix looks like at LEAST 24KV to me--maybe MORE.

Was one of the tubes you changed the H-osc tube or damper? A weak osc tube WILL allow way too much current through the fly, lower HV and overheating. As others have said--you DO need to check the H-drive current level now--to make SURE it is under 220 MA. Cool fly tire and core or NOT...you NEED to KNOW.

[Arcanine]

Originally Posted by rca2000

I TOLD you...you were NOT that low on HV...now I am SURE of it !! That pix looks like at LEAST 24KV to me--maybe MORE.

Was one of the tubes you changed the H-osc tube or damper? A weak osc tube WILL allow way too much current through the fly, lower HV and overheating. As others have said--you DO need to check the H-drive current level now--to make SURE it is under 220 MA. Cool fly tire and core or NOT...you NEED to KNOW.

Yes. I had one Damper crap out on me, so I've switched it. Same thing for the H-Osc tube. I swapped it as well.

I'm going to tug the chassis out tomorrow and add in the two needed wires and the cap so I can check the current. I want to make sure it's below 220 so I can baby this fly. I ran the set again for a few minutes, and it's stable and very bright.

I'm gonna get together with Electronic M soon hopefully, and I think we can hammer out the last of the sets issues and make it work fully again.