Videokarma.org TV - Video - Vintage Television & Radio Forums

Videokarma.org TV - Video - Vintage Television & Radio Forums (http://www.videokarma.org/index.php)
-   Rectangular Screen Tube Televisions (http://www.videokarma.org/forumdisplay.php?f=45)
-   -   1968 RCA BW Sportabout 19" (http://www.videokarma.org/showthread.php?t=263581)

DavGoodlin 02-09-2015 03:38 PM

1968 RCA BW Sportabout 19"
 
I got this neat-O classic off Craigslist along with a 1985 Colortrak 19" and a rolling stand that was from something else.
TV Tim has dibs on the Colortrak (works fine- its a CTC120!) and stand which sort-of fits it. :D

https://farm8.staticflickr.com/7379/...f10659f1_z.jpg


Its a KCS 160E model AJ-080 - "The Heralder". The tubes all tested OK except for the 5KE8. Only the 15KY8 appears to be a replacement.

https://farm9.staticflickr.com/8609/...0f005977_z.jpg
[url=https://www.flickr.com/photos/100376096@N02/16297801150/]

https://farm8.staticflickr.com/7459/...ca6b5e4e_z.jpg


But... heres what I got after a long and slow power-up. :sigh: The signal stages are not working either, sound is just sweep-noise and static.
The brightness is at 50 % but blooms it away if turned up, so HV is likely very low.

https://farm8.staticflickr.com/7430/...abe60bbe_z.jpg


Im afraid its the yoke and I'll check it on my Sencore VA-48:smoke: but I figured Id post here in hopes of a better opinion:scratch2:

Eric H 02-09-2015 03:46 PM

Could someone have twiddled that horiz hold coil so far off it won't run right?

zeno 02-09-2015 04:51 PM

Sorry IMHO yoke or vert out transformer 95% yoke.

73 Zeno:smoke:

Findm-Keepm 02-09-2015 08:45 PM

Ditto on what Zeno says - classic shorted yoke, horizontal winding or one or both vertical windings. We used to see this quite often here in southeast Virginia - humidity in the summer would kill yokes. Our countermeasure was a good coat of Humiseal (kinda like spray polyurethane, but with acetate as the sealing agent). Lemme see if I have a yoke - KCS160 was a popular chassis, so finding one should be easy.

Boobtubeman 02-09-2015 11:15 PM

Wow havent seen one of those in years.... rescued one off a garage floor of an empty house in the early 80s, One H.OUT tube, and it was non responsive till i firmed up the yoke plug and it was a great set!! :)

SR

Marco-nix 02-10-2015 06:20 AM

Boobtubeman is right also... sometimes the connections are corroded after the set is off since longtime due to the humidity ...wouaaaa my bad english but i'm sur you'll understand what i write. :D

Kamakiri 02-11-2015 06:12 AM

Quote:

Originally Posted by DavGoodlin (Post 3126022)
I got this neat-O classic off Craigslist along with a 1985 Colortrak 19" and a rolling stand that was from something else.
TV Tim has dibs on the Colortrak (works fine- its a CTC120!) and stand which sort-of fits it. :D

Second dibs if he doesn't want the Colortrak :D

dieseljeep 02-11-2015 09:48 AM

Quote:

Originally Posted by Findm-Keepm (Post 3126048)
Ditto on what Zeno says - classic shorted yoke, horizontal winding or one or both vertical windings. We used to see this quite often here in southeast Virginia - humidity in the summer would kill yokes. Our countermeasure was a good coat of Humiseal (kinda like spray polyurethane, but with acetate as the sealing agent). Lemme see if I have a yoke - KCS160 was a popular chassis, so finding one should be easy.

Yokes of that era used some kind of a nasty type cement, that humidity would cause it to eat though the enamel on the wire. I looked like black crumbly stuff.
Just about every yoke failure was caused by this and not just the RCA yokes. Other makes, as well. :sigh:

Eric H 02-11-2015 10:38 AM

We had a 1970ish version of this set whan i was a kid, one (of many) failure(s) it had was a shorted Yoke.
Turned it on one day and it popped the fusible link.

They used Compactron tubes by that time.

DavGoodlin 02-11-2015 03:37 PM

Quote:

Originally Posted by dieseljeep (Post 3126126)
Yokes of that era used some kind of a nasty type cement, that humidity would cause it to eat though the enamel on the wire. I looked like black crumbly stuff.
Just about every yoke failure was caused by this and not just the RCA yokes. Other makes, as well. :sigh:

Right you are! And rarely is it so obvious..check this out. Both one horizontal winding and one vertical winding are open, which explains the wacky symptoms.

https://farm8.staticflickr.com/7419/...96564aa6_z.jpg

https://farm8.staticflickr.com/7307/...f13e02f9_z.jpg

If anyone wants to sell me a used one or trade for similar crap, here is the number.

https://farm9.staticflickr.com/8647/...380a7ca4_z.jpg

Otherwise, I'm hoping Moyers doesn't want a king's ransome for this.

Years ago, I scrapped many interesting sets including a slick 16" Emerson:tears: with yoke fails, because I knew the replacement would cost what the set was worth second hand - 40 years ago....:sigh:

zeno 02-11-2015 05:43 PM

Quote:

Originally Posted by dieseljeep (Post 3126126)
Yokes of that era used some kind of a nasty type cement, that humidity would cause it to eat though the enamel on the wire. I looked like black crumbly stuff.
Just about every yoke failure was caused by this and not just the RCA yokes. Other makes, as well. :sigh:

Yokes went in a lot of B&W's. I remember well the glue turning to
black crap. Zeniths & Admirals went often & damn near every
Philco with no raster was the yoke.
Often if a yoke is shorted its easier to pull it off & run the set.
Usually it would brew up so no need to pull a tester.

73 Zeno:smoke:

Eric H 02-11-2015 05:58 PM

I have a few NOS Yokes for 110 degree tubes, I'll look and see if I can come up with some numbers tonight.

Boobtubeman 02-12-2015 09:27 PM

Heck i was close....... Just the wrong end of the yoke :D

SR

El Predicta 02-16-2015 02:43 PM

I have a NOS Triad YT103-1 that will sub for the one you need.

One thing I need is a chassis (decent condition) for a Pilot TV 37. Or Predicta knobs or trim parts.

Maybe we could do some trading?

PM sent.

Eric H 02-16-2015 03:50 PM

I looked through mine and don't have anything close.


All times are GMT -5. The time now is 02:16 AM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.