I'm no TV guy, but I picked up a "roundie"

[radiolee]

RCA 9-T-246

Supposedly it works. Besides bringing it up slowly on a variac, and staying away from the high voltage, what else do I need to know to try it?

That's a piece of the plastic molding hanging in front of the tube.

Thanks!
Lee

[radiolee]

Or does "roundie" usually refer to color sets?

[Tubejunke]

I never heard the term "roundie" till I got on the net so I doubt there is any kind of rule for the use of the term.

[Eric H]

I've heard "roundie" more in conjunction with color sets but hey, if the tube is round...

Nice set, is that the T-100?

Just make sure everything's in place and bring it up slowly. It will probably still need to be recapped but it's fun to see if you can get anything out of it.

Eric

[polaraman]

Nice find The bman is happy!

polaraman

[Chad Hauris]

There are some precautions re: variac:
1. is that in a set w/tube rectifier, you have to have a fair amount of input voltage to light up the rectifier so you can get any DC out at all...by that time, the DC output is likely to be high. To re-form the electrolytics, it is probably better to use a 0-400 volt dc supply connected to the electrolytics, with the rectifier tube removed, and TV set unplugged, bringing the voltage slowly up to the recommended b+ voltage of the set...watching the current meter for excessive current draw.

2. is that if you operate the set at a reduced B+ voltage on a variac, you can overload the flyback/horizontal output tube by not providing it with enough drive signal to produce proper bias.

What I do is to use a series light bulb if I suspect a short in a set...use about a 100 watt lightbulb in series with the power cord. If the bulb instantly glows bright, there is a short...if it goes bright initally and then dims, it is most likely O.K. to go ahead and just plug it in. If the set doesn't have one, install a fuse in the powerline to help protect it.

[radiolee]

Well, I juiced it up and results are:


No picture. No sound.

Audio amplifier seems to be functioning.



Too many projects to go any further with it. If anybody would like the set and can pick it up in SE Minnesota, drop me a PM.


Thanks for the replies!

Lee