A thin white line across the raster Admiral TV 1948 model 17T12

[recepteur]

Originally Posted by old_coot88

I wouldn't want to advise you on using a scope considering the voltages present.

As an alternative, I would do this - take a cap of .1 uf or higher, and jump it from pin 5 to ground and see if it kills the blip. Then from pin 9 to ground and see. Try the cathode too for the heck of it (pin 2).

But as a precaution, first measure voltage on the pins to be sure it doesn't exceed the cap's voltage rating.

old_coot88,

Will do. !

Thanks

Cheers

[old_tv_nut]

Caution! I believe the CRT except for cathode and G1 are all floating on the high voltage (thousands? of volts).

If you have a spare replacement .005 cap for C54/C55, that could work to protect your scope, as it has the required voltage rating for whatever is on the CRT.

[old_tv_nut]

A similar Admiral schematic
https://www.earlytelevision.org/pdf/..._rider_tv3.pdf
lists C54/c55 as .005 mfd, 6000 volts.