A new freebie!!!

[rca2000]

I would most definltely call that "potential". Tube looks to be good too !!

[Electronic M]

I'd say your deflection rail lytics are open.

[Kamakiri]

Kinda my thought too......

[BigDavesTV]

Definitely worth rebuilding! The "wave" disturbance in the picture looks like leaky electrolytic filter caps, to me. This should turn out NICE, congratulations!

[rcaman]

classic sign of a bad power supply filter. great score on the tv.

[Jon A.]

I would say this makes up for the color roundie whose CRT filaments wouldn't light.

Perfect emission with no cataract is a rarity in itself.

[Kamakiri]

Well, she's up on the bench . Good thing DavGoodlin told me about that tuner mounting trick on these sets!

Ordering up caps this morning. The set's definitely seen some love in its life, there's a brand new color crystal soldered in underneath, and the picture tube is an RCA Colorama that looks relatively new.

[rcaman]

classic sign of bad power supply caps. great set.

[DaveWM]

Originally Posted by rcaman

classic sign of bad power supply caps. great set.

ditto that PS caps. Sometimes if you have trouble not getting the vert to fill out (prob just the low power test in your case) the cathode bypass cap on the vert board may be bad, but most of the time its fine too. there are a couple HV caps in the vert feed back that can be problems like a .0082 2kv film.

that era has pretty good film caps so it should not take much to get it worked out. there is a sand resistor down by the choke mounted to a term strip, that strip gets real toasty, can break easy, just leave it be.

check the resistor in the boost supply to the vert, think its a 100k, often will drift high hurting vert height (the vert multivibrator uses boost voltage thru the height or lin pot, not sure about how rca lables those).

One thing you do not want to do is a shot gun replacement of film caps, just not needed, and the pcb's are often cooked, do not need the stress. oh and last thing watch out for the jumper wires on the top of the chroma board, they tend to corrode, when that happens the diff amps lose plate voltage.

[Kamakiri]

Agreed.....I don't plan on doing the film caps at this point, with the exception of two or three white ceramic Elemencos. Don't recall the values but the voltages were in the 1 kV plus range.

[DaveWM]

yea those are the .001 2KV caps one on the primaries of the audio out and vert out transformers. I do those as well since there is no good test for them.

fyi, you find them in mousers under snubber caps.

[Kamakiri]

Recap is underway, and I ran into a couple headscratchers.....

First, there's a wire coming from the main power transformer that was cut and had black tape around the end. Don't know why, don't know where it would go? The set was working as per previous posts, but I don't know what this could be?

Second, while doing the one filter can, I saw this rating on the first value in the can....160 uF @ 250 VDC 1.1 amp @ 60 ~ . Is this one of the caps like I've run into in Dumonts where the value has to be calculated per that spec, or is it just 160 uF @ 250?

I don't have the Sams for the set unfortunately.

[Username1]

You just missed a few on ebay.....
http://www.ebay.com/itm/RCA-CAPACITO...-/110777567412

I have seen that before, and all I can think of is that it may be the ac component
that it is expected to pass to ground..... Kind of a power dissipation ~ specific
reading on ESR ???

.

[DaveWM]

Tape wire off power trans is a hi volt primary tap. If you have high voltage (about say 123v all the time) it may be worth using it. Or just leave it be since you will prob not leave it on all day anyway.

to use t you have to find the other primary that is in use and switch them, taping off the unused. Just have to make sure its the right primary, you would not want to connect the power trans to the line using the low volt and the high volt taps, that would blow the transformer.

[DaveWM]

voltage doubler that cap, a good quality cap should be fine, I would go with a low ESR. Was the old can cap bad?