roundie color sync

[DaveWM]

ah ha...

checking voltages (resistance looked good) and the screen is at or below 100 should be 125, then I check the 275v source (which is dropped to get the screen voltage) and its at 257v.

I know osc tube can be finicky about low voltages (at least in FM radios and I presume in TV that have 6gh8 tubes) so I will need to check this out.

the voltage starts out at 290 but drops fast.

Tube grid should be -5 but its more like -.2

I guess there maybe too much of a load somewhere dragging down voltage on the 275v source.

[DaveWM]

I do have a variac, that will allow me to up the line voltage somewhat, I think I will give that a try as a quick fix.

[DaveWM]

no help with the variac. gonna pull the chassis and check the B+ current draw to see if excessive. I may just go ahead and swap that crystal while its out. The sams did not give any wave forms to check on the osc tube, just the chroma sync pulse that goes to it, so I can check that before pulling.