RCA Victor portable TV from the 1950s

[michaelz]

Originally Posted by vortalexfan

Cool, thanks for the link. So, mine doesn't power up when you turn on the power switch, and it does have all of its original RCA branded Tubes in it.

Also was this considered a high end set?

check filament of all the tubes.

[vortalexfan]

Originally Posted by michaelz

check filament of all the tubes.

This isn't a series string set, it has a power transformer in it, and I don't see any fuses in it.

The tube placement chart and chassis number is missing from the set so I don't know if I can find a service manual for this TV or not.

[vortalexfan]

Here's some pictures of the inside of the TV.

[Kevin Kuehn]

Very nice! Looks like it'll clean up real well, should be a fun project. Sams index says 513-2.

[vortalexfan]

Originally Posted by Kevin Kuehn

Very nice! Looks like it'll clean up real well, should be a fun project. Sams index says 513-2.

Unfortunately I don't have Sam's Folders going that high, my Sam's Folders only go up to 469 and they aren't even a complete set of Sam's Folders going that high.

[Eric H]

That looks like a Thermistor, I seem to recall replacing one in my set. If it is you could just jumper it and power it up with a variac or dim bulb tester.

[vortalexfan]

Originally Posted by Eric H

That looks like a Thermistor, I seem to recall replacing one in my set. If it is you could just jumper it and power it up with a variac or dim bulb tester.

You mean the mystery part?
If so what was the purpose of that thermistor in that spot, and how do I jump it?

[michaelz]

Originally Posted by vortalexfan

Unfortunately I don't have Sam's Folders going that high, my Sam's Folders only go up to 469 and they aren't even a complete set of Sam's Folders going that high.

Just found it, 1.7MB in PDF format, can you provide email address, I send it to you ASAP. see if you can use it.

[dieseljeep]

Originally Posted by michaelz

check filament of all the tubes.

IIRC, the set is considered to be a 1961 model.
RCA made about three years of that model. The 1959 model used a 5U4 rectifier, where the newer ones used the voltage doubler circuit.
A member of my family had a 1960 model that was the TOTL. It had a two-tone charcoal and white cabinet with all chromed metal knobs and a better looking front bezel.
The one you show is a lower priced version of basically the same set.
The TOTL 1961 models had a new-vistor tuner.

[vortalexfan]

Originally Posted by dieseljeep

IIRC, the set is considered to be a 1961 model.
RCA made about three years of that model. The 1959 model used a 5U4 rectifier, where the newer ones used the voltage doubler circuit.
A member of my family had a 1960 model that was the TOTL. It had a two-tone charcoal and white cabinet with all chromed metal knobs and a better looking front bezel.
The one you show is a lower priced version of basically the same set.
The TOTL 1961 models had a new-vistor tuner.

Yes, and apparently it also came with a remote in the Top of the line models...

My tv seems to have developed a vertical problem where the top of the screen isn't going all the way up to the top and it bounces around, and the vertical output/oscillator tube is still good yet, any ideas as to what could be causing the unstable vertical?

One theory I have is that the vertical section has about 3 paper caps in it which may have become leaky, but not sure if that's the problem or not.

[vortalexfan]

OK so I was looking in the Sam's Photofact for this TV and found that the specs given in the manual for the thermistor for this TV is 120 Ohms Cold, with that in mind what kind of thermistor should I get?

I know there are two different types of thermistors, ones start off high resistance when Cold then as they warm up they kick in at zero ohms and then there's ones that start off at zero ohms cold and as they warm up they get higher in resistance.

I'm assuming I'm going to need one that starts off high resistance cold and then goes to zero when its warm, if so would any of the thermistors in the Mouser link below work in this application?

https://www.mouser.com/Circuit-Prote...z0x6xbZ1z0z5h6

Thanks for your help!