Started working on replacing the E-Caps tonight. I won't go into detail on how I make them up. BTW, these E-Caps all have cardboard covers so I left about 1/4 of the "donor" can to help align the PVC sleeve. Then the original can will be trimmed in length for the cardboard cover.

I want to get new E-Caps in so I could power it up and see where I am.

https://tvrestorerguy.com/wp-content.../100_9522a.jpg

But I wanted a pony!

I figured shape would affect it.

A later Crosley model, the 9-407, was a clone of the DuMont RA-103. Your 9-403 uses a continuous tuner a la DuMont, but the chassis layout is quite different than the RA-103. And the immediately preceding DuMont model (RA-102) was very, very different from this Crosley chassis (and the RA-103), so no obvious kinship there.

Was it DuMont-based? Maybe comparing schematics would tell you. Since Crosley eventually used a DuMont clone chassis, the two companies might have had some kind of earlier licensing or technology exchange agreement, short of full cloning.

As for replacing the gimmicks with mica caps, why replace them at all? They are just pieces of wire. What could go wrong with them?

Phil Nelson
Phil's Old Radios
https://antiqueradio.org/index.html

Phil,
Thanks for the insight. I have to admit, this TV will be a bear to recap. Lots of caps and resistors. Some jammed pretty tight.

I finished re-stuffing the E-Caps. Then I installed them.

https://tvrestorerguy.com/wp-content.../100_9523a.jpg

After carefully checking my work and a good look see. I powered it up. First without the LV rectifier tubes, then with them but no H. Osc tube. All went well. Then all the tubes and my test CRT.

I got a raster and clear but faint sound. I tried twiddling all the controls but I couldn't get the horizontal to lock.

Then I installed the CRT that came with the set. Works great! A little too much light in my shop to really check for that purple glow. I'll do that tonight.

I switched over to FM, then screen went blank but I couldn't get any signals.

Overall I'm happy so far. BTW, the sound was very quiet. No hum or hash.

Later on after I check the CRT again, I'll start on the recap.

https://tvrestorerguy.com/wp-content.../100_9524a.jpg

Oops. Duplicate post.

Very encouraging for an un-recapped set. I predict smooth sailing from here on out. It's fun to watch the picture shape up as you replace more and more old caps.

Phil Nelson
Phil's Old Radios
https://antiqueradio.org/index.html

Yeah, I'm looking forward to going through each section. I'm sure I'll have questions on the tuner.

BTW, I just finished checking the CRT in the dark. It still has that purple glow around the perimeter of the neck. Great bright raster though. We'll see as we go along.

I think I'll start with the HV section and work backward through the set.

After turning the chassis over to start recapping, I found this on my bench top.

https://tvrestorerguy.com/wp-content.../100_9549a.jpg

Wax drippings from a capacitor! A quick visual showed which one started dripping. It was C81. 1 of the Damper filter caps. L29 is the H. Linearity Coils.
Looks like I was pushing the limits when I powered it up.

Here are the before and after pictures along with the schematic.

https://tvrestorerguy.com/wp-content.../100_9494a.jpg

https://tvrestorerguy.com/wp-content.../100_9550a.jpg

https://tvrestorerguy.com/wp-content.../100_9551a.jpg

https://tvrestorerguy.com/wp-content.../100_9552a.jpg

Well you know what they say: if there ain't no wax under it, there ain't no wax in it.

Er... wait.

I have a question about a cap that is used in this TV. It is C63 and it is listed as a .00025uf 600V cap. The one in the chassis is indeed a .00025uf 600 paper cap. It is used as a Sync Coupling cap. Can I use a 250pf 500V mica cap instead? I can't find this value anywhere in a film capacitor. I've included the area of the schematic that it is used. I would think a mica cap would be better than using a ceramic disc cap.....right?

https://tvrestorerguy.com/wp-content.../100_9560a.jpg

I would think that a mica cap would work fine in that application.... surprised to see such a small value paper cap.

jr

Good!......Me too! Thanks.

OK, finished the Horizontal section tonight. Tomorrow I'll power it up and check my progress.

https://tvrestorerguy.com/wp-content.../100_9562a.jpg

https://tvrestorerguy.com/wp-content.../100_9564a.jpg