Lights are on, but nobody's home....Crosley 307TA

[DaveWM]

a few things to try.

do you have a neon bulb? if so tape to a plastic stick a few inches long and hold near fly, look for the bulb to light.

is there an ion trap? of so make sure its adjusted properly

check pin voltages at CRT, often a problem there will cut off the CRT

[Kamakiri]

Originally Posted by DaveWM

a few things to try.

do you have a neon bulb? if so tape to a plastic stick a few inches long and hold near fly, look for the bulb to light.

is there an ion trap? of so make sure its adjusted properly

check pin voltages at CRT, often a problem there will cut off the CRT

Got a neon bulb at Radio Shack, and tested for HV. The bulb lit up!

Okay, so we have HV. The ion trap on this set is a weird kind of electromagnet, with wires going underneath the chassis. Never seen one like this before.

Just start rotating it around?

[Einar72]

You could try holding a compass near it to see if there's any field present, but, then I just realized there may be a PM centering setup, which can also aggrivate a misplaced ion trap...

[old_coot88]

Originally Posted by Kamakiri

Got a neon bulb at Radio Shack, and tested for HV. The bulb lit up!

So.. is this at the anode of the HV rectifier? How much actual DC high voltage are you getting at the "second anode", ie., the anode of the CRT itself? It should be around 8 - 10 KV or so.

The ion trap on this set is a weird kind of electromagnet, with wires going underneath the chassis. Never seen one like this before.

Disconnect one end of the coil and check it for continuity. What resistance does it show?

[DaveWM]

the neon light is just a start, as old coot said, I use it to make sure the HO tube and damper and at least the primary of the fly are working. I use a HV prob myself to check for HV DC at the CRT anode (not big on the arc trick, but then again I have a probe). see if you can see any glow in the HV rectifier (gassy). you need to look at it when the room is dark. Better yet start looking for an HV probe.