fdt-5bx5 Violently Exploding Capacitor

[old_tv_nut]

I presume you're talking about L503 and the label "MAGNET?"

This is the first time I've seen a magnetic core labeled "MAGNET," but presuming it's not a misnomer, maybe this is meant to be a saturable reactor?

I'm having trouble seeing how this sweep circuit works - what is connected off to the right?

[vol.2]

Originally Posted by old_tv_nut

I presume you're talking about L503 and the label "MAGNET?"

This is the first time I've seen a magnetic core labeled "MAGNET," but presuming it's not a misnomer, maybe this is meant to be a saturable reactor?

I'm having trouble seeing how this sweep circuit works - what is connected off to the right?

I looked up saturable reactor because I've never heard that term before. Honestly not sure what the deal is. If what you are suggesting is true, perhaps the core is saturating and that is the reason for the distortion. If so, maybe there's some way to limit the current to the coil?

I did a bunch more tests and checked voltages, and the only thing I found that wasn't as per the schematic is the 170Vpk sine wave on the horizontal is actually about 208Vpk as I measure it on my scope. I didn't think that was any issue though as I'm sure I've noticed that voltage be similarly high in other sets.

This is what's to the right: