rca focus rectifier

[timmy]

does anyone know the rca focus rectifier part number for the ctc15 chassis. thanks

[StellarTV]

Focus rectifier on a CTC15 is a 1V2 tube.

[dieseljeep]

Originally Posted by StellarTV

Focus rectifier on a CTC15 is a 1V2 tube.

The CTC15 is the only RCA that used a selenium stick type focus rectifier.
Can't remember the part number, but they were available from, just about every semiconductor maker, such as GE, NTE, IR and Philips ECG.

[rick65]

From the RCA Service Data Book Dated 1963 T6
location CR102 Focus Rectifier
RCA #113397 Rectifier selenium

[dieseljeep]

Originally Posted by rick65

From the RCA Service Data Book Dated 1963 T6
location CR102 Focus Rectifier
RCA #113397 Rectifier selenium

Yah, that's the number!
I would buy at least three at a time. All the clones used them, as well.
Zenith used them, starting with the "X" chassis, for a few years.

[StellarTV]

Wow! Mustn't have worked out well since the CTC16 went back to the tube.

[marty59]

Originally Posted by StellarTV

Wow! Mustn't have worked out well since the CTC16 went back to the tube.

I always wondered that myself, but...

I do believe that the stick rectifier did it's job well, but maybe the fact of being able to quickly replace a tube (as opposed to) in the field had something to do with the decision.

[timmy]

ok guys great since thats the number i have and im sure this chassis needs the rectifier as well as the 6kv 130 cap and related resistors because upon turning it on the picture is a bit out of focus and after a few minutes its better but needs much more focus but cannot obtain it. so im sure something along the lines of those components are going bad.the fly is new so i might as well go ahead and change these items and hope it cures the problem.

[dieseljeep]

Originally Posted by timmy

ok guys great since thats the number i have and im sure this chassis needs the rectifier as well as the 6kv 130 cap and related resistors because upon turning it on the picture is a bit out of focus and after a few minutes its better but needs much more focus but cannot obtain it. so im sure something along the lines of those components are going bad.the fly is new so i might as well go ahead and change these items and hope it cures the problem.

I wouldn't replace the rest of the parts!
99% of the time, the rectifier cured the focus problem.

[Tim]

Here are 2 sources:

http://www.surplussalespa.com/catalo...4e5f31a9c65f07

http://www.ebay.com/itm/Solid-State-...-/111051659375

[Findm-Keepm]

Originally Posted by Tim

Here are 2 sources:

http://www.surplussalespa.com/catalo...4e5f31a9c65f07

http://www.ebay.com/itm/Solid-State-...-/111051659375

Also, talonix:

http://www.talonix.com/shop/item.aspx?itemid=15584

Surplus Sales of PA has a minimum order of 10 dollars, else a 5 dollar service fee.

Cheers,

[walterbeers]

I used to replace a lot of those selenium rectifier focus sticks. They were a very common problem of poor focus. Mainly I bought those made by Workman. Also there is a boost selenium rectifier that goes bad as well under the chassis that provides the boost voltage for the screen controls. When that goes bad, boost voltage drops, along with the brightness which is tied to one side of the color screen controls. Workman also made those as well. Both of those were very common to go bad.

[Electronic M]

Originally Posted by walterbeers

n. Also there is a boost selenium rectifier that goes bad as well under the chassis that provides the boost voltage for the screen controls. When that goes bad, boost voltage drops, along with the brightness which is tied to one side of the color screen controls. Workman also made those as well. Both of those were very common to go bad.

A good recommendation. I had one fail on me, and the set would not display a raster except for a a split second after turning it off. The boost was designed to be under 2KV on my set so I used two 1KV diodes that radio shack sells in series to replace it...~Four years later it is still holding up just fine.

[dieseljeep]

Originally Posted by Electronic M

A good recommendation. I had one fail on me, and the set would not display a raster except for a a split second after turning it off. The boost was designed to be under 2KV on my set so I used two 1KV diodes that radio shack sells in series to replace it...~Four years later it is still holding up just fine.

I was thinking of doing that very same thing, only with the focus stick, maybe several more in series.
There used to be solid state plug-in replacements for 1V2, 2AV2, 3AT2, 3A3 and 6DW4. I only used the 3A3 replacements, when the filament winding arced through. I cut the leads from the HV rectifier socket and used the replacement.

[walterbeers]

ECG also has them, it's ECG118. Just do a google search for selenium focus rectifier. There are several on there for sale.