View Full Version : 1968 RCA BW Sportabout 19"


DavGoodlin
02-09-2015, 03:38 PM
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/7379/16299338827_e0f10659f1_z.jpg (https://www.flickr.com/photos/100376096@N02/16299338827/)


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/8609/16297801150_9e0f005977_z.jpg (https://www.flickr.com/photos/100376096@N02/16297801150/)


[url=https://www.flickr.com/photos/100376096@N02/16297518538/]https://farm8.staticflickr.com/7459/16297518538_2cca6b5e4e_z.jpg (https://www.flickr.com/photos/100376096@N02/16297801150/)


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/7430/16484253692_3cabe60bbe_z.jpg (https://www.flickr.com/photos/100376096@N02/16484253692/)


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
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
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
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/7419/15884345513_7496564aa6_z.jpg (https://www.flickr.com/photos/100376096@N02/15884345513/)

https://farm8.staticflickr.com/7307/16316755098_86f13e02f9_z.jpg (https://www.flickr.com/photos/100376096@N02/16316755098/)

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

https://farm9.staticflickr.com/8647/16504502845_e5380a7ca4_z.jpg (https://www.flickr.com/photos/100376096@N02/16504502845/)

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
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.

DavGoodlin
02-17-2015, 10:14 AM
Thanks for checking Eric. I purged alot of excess stuff back in '88 when I gave this up, now I regret it.

dieseljeep
02-17-2015, 10:34 AM
Thanks for checking Eric. I purged alot of excess stuff back in '88 when I gave this up, now I regret it.

I have the same set. Some klutz tried soldering the antenna lead with some solid rain gutter solder and dripped a big blob on the yoke winding. I used a heat gun, instead of a soldering iron, to minimize damage to the winding. It doesn't look too positive.
I too, scrapped a lot of parts for the old sets, now I'm paying through the nose for the same items. :thumbsdn:

DavGoodlin
02-17-2015, 01:05 PM
If this set wasn't in such good condition complete with hang tags, schematic and operators manual, I would not go through the trouble of ordering a yoke.

But, Moyer's Electronics had 4 of them in Thordarson and I just bought one for $25 plus tax and shipping. That must have been from the 1985 list price - LOL

I moved the set to the attic, thinking it would be hard to find the part. Probably what the last owner did when it crapped out originally. Usually when a set works perfect and suddenly quits, it is likely to reappear at the estate sale. Otherwise when there are a ton of hours on it before it quits, it just goes to the curb.

Many Zeniths met this fate because the owner often said, "that played fine for years and then poof - that set owes me nothing". Stay tuned, this isnt over yet.

TVTim
02-20-2015, 05:45 PM
The ColorTrak is playing in my living room right now. I love it.

DavGoodlin
03-26-2015, 07:21 PM
The new old stock RCA yoke came from Moyers. It did not have the evil black epoxy on it - good to know this may have been addressed as this yoke is dated 1976.

It plugged right in and worked as hoped. $35 including shipping was not too much to spend for a new part:) 'specially with such a good CRT and cabinet.

DavGoodlin
04-02-2015, 03:02 PM
How appropriate to get an OEM part.
https://farm8.staticflickr.com/7630/17010962102_34cb3931ce_z.jpg (https://www.flickr.com/photos/100376096@N02/17010962102/)

Even better when it works. I find when replacing a big-ticket item, that is usually it. Otherwise one cap, one resistor, one tube rarely is the extent of the problem.
https://farm9.staticflickr.com/8701/17011541071_c650b2bf1e_z.jpg (https://www.flickr.com/photos/100376096@N02/17011541071/)

The brightness is only at 60% here, this set has a lot of life in it. Needs a bit of work on the vertical linearity but that may be it.
https://farm9.staticflickr.com/8727/16392286293_d090d7f1b7_z.jpg (https://www.flickr.com/photos/100376096@N02/16392286293/)

Boobtubeman
04-03-2015, 12:04 AM
Ah, that brings back fond memories of the one i fixed up in the 80s... :)

SR

JB5pro
04-03-2015, 06:20 PM
I hope i am not repeat'n someth'n another wrote but i think that model was offered in solid state too. If not that cabinet one close to it mmaybe with that sweeping plastic handle on top came in tube or ss.

sorry, i guess i am try'n too hard again:yes:

DavGoodlin
04-03-2015, 09:52 PM
I hope i am not repeat'n someth'n another wrote but i think that model was offered in solid state too. If not that cabinet one close to it mmaybe with that sweeping plastic handle on top came in tube or ss.

sorry, i guess i am try'n too hard again:yes:

The only solid state RCA I recall from the 60s is the 9" KCS 153, which is mentioned in another forum recently.

rca2000
04-03-2015, 10:27 PM
The only solid state RCA I recall from the 60s is the 9" KCS 153, which is mentioned in another forum recently.

That one--and the KCS-157, which is a 10" or so portable--AC/DC set--with the pop-up controls. 1967 I think. Have one somewhere.

I THINK for 1969 or so....they came out with the KCS 184 or such another SS AC/DC set.

Then of course--in 1968...there was the CTC 40 SS COLOR set--but it could NOT be called portable...

BigDavesTV
04-04-2015, 08:31 AM
Great picture, and a positive rescue of a classic larger portable! I sure hope Moyers stays around, they are a valuable resource for parts. Last week I ordered an Horizontal Oscillator / Horizontal Waveform Coil, that got the H. Osc. running again in my 1965 Magnavox roundie color tv, I'm very pleased, part and shipping just under $20, can't beat that. Until the early to mid-80's, I had two local electronic parts suppliers, within 10 miles of my house, Electronic Supply Co., and Joe Coombes Dist., both in Pontiac, MI, I sure do miss them, great resources, long since gone.