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[dtvmcdonald]

There are other tests you can do! First, get a .01 to .047 uF film cap (greater than 250 volts) and connect the 6.3 volt filament line to pin 2 of the CRT (point C on Sam's) with it. This should generate a substantial hum bar on the screen.

You could also try connecting the 6.3v through that cap to pin 1 of V6 (video amp) as that should product a really strong hum bar.

[Yamamaya42]

Originally Posted by dtvmcdonald

There are other tests you can do! First, get a .01 to .047 uF film cap (greater than 250 volts) and connect the 6.3 volt filament line to pin 2 of the CRT (point C on Sam's) with it. This should generate a substantial hum bar on the screen.

You could also try connecting the 6.3v through that cap to pin 1 of V6 (video amp) as that should product a really strong hum bar.

enter confused mode---

The heaters are series wired in this set, so which point in it would be a tie reference to give the 6.3v for a hum bar pattern to show on the screen?

[timmy]

Is there a way to differentiate between the ts 4j 4h 4d they all use the same ballast but there are slight changes between them is there any concrete tell tale that would identify any differences.