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Old 04-10-2017, 10:42 PM
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Wanted: yoke for rectangular color set

I've got a Hitatchi CNA-25T tube color set with a bad vertical winding (I learn this after spending a lot of time recapping it and going through the vert ).

Hitatchi part# is353017(2440164) Sams says it crosses to Merrit MDF-145C, Stancor DY95-AC , Thordarson Y-109, and Triad YC-312-2
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Old 04-11-2017, 11:55 AM
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Did some searching on my own the only one I've seen out there is the Triad part and the places that claim to have it want ~$250 for it! Anyone have one for a sane price?
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Old 04-11-2017, 01:06 PM
dieseljeep dieseljeep is offline
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Did some searching on my own the only one I've seen out there is the Triad part and the places that claim to have it want ~$250 for it! Anyone have one for a sane price?
Is the chassis Japanese made or made by some USA firm?
I take it, that the set is a 23V type set.
Do you think the yoke pulled from an Admiral or Philco would work?
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Old 04-11-2017, 02:06 PM
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It is definitely a Japanese made chassis. It is likely some of the circuits were licensed from RCA (who else would put 5-6 6GH8s on a chroma board? ), and the one-piece convergence yoke/ mount for the deflection yoke is the same as in most rect RCAs I've seen.

It is a ~17" metal cabinet table top.

I'd guess there were American sets with compatible yokes since so many subs exist. I can get you the specs off the sam's tonight. The vert is two plain windings the horiz has one plain and another with two taps mid winding.

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Last edited by Electronic M; 04-11-2017 at 02:11 PM.
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Old 04-11-2017, 11:25 PM
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Here are the specs listed in the sam's. The winding with the thermistor is open...I checked the leads to the plug and the thermistor too and those are still good it is definitely the winding that died. I have 1-3 tube era rect color yokes laying around I may try and check compatibility on, but I don't place much hope in what I've got.
Another crazy idea I've got is to put increasingly high voltage across the winding terminals until the open bridges, arcs (so I can find and fix it), or the winding shorts (no loss there).
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Old 04-12-2017, 02:22 AM
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Tubejunke Tubejunke is offline
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Quote:
Originally Posted by Electronic M View Post
Did some searching on my own the only one I've seen out there is the Triad part and the places that claim to have it want ~$250 for it! Anyone have one for a sane price?
I will have to look in my box of NOS flys and yokes and see if I have that one. The Thordarson number sounds familiar. As for price, I wish someone would give me what those idiots are asking for my entire lot! Geez! I have two crates of 50s-60s flys and yokes. Mostly Thordardson and Merit with some factory stuff mixed in if memory serves me correctly. No, there's not any "roundie" yokes or 40s RCA flys left. That stuff got grabbed up early on.

Anyway, if I have it I wouldn't want much for it. Mostly shipping....
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Old 04-12-2017, 09:38 AM
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Quote:
Originally Posted by Tubejunke View Post
I will have to look in my box of NOS flys and yokes and see if I have that one. The Thordarson number sounds familiar. As for price, I wish someone would give me what those idiots are asking for my entire lot! Geez! I have two crates of 50s-60s flys and yokes. Mostly Thordardson and Merit with some factory stuff mixed in if memory serves me correctly. No, there's not any "roundie" yokes or 40s RCA flys left. That stuff got grabbed up early on.

Anyway, if I have it I wouldn't want much for it. Mostly shipping....
Thanks. let me know if you find it.
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Old 04-12-2017, 11:28 PM
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Quote:
Originally Posted by dieseljeep View Post
Do you think the yoke pulled from an Admiral or Philco would work?
Don't know, but I decided to look at some of the yokes I have and see if anything was in the ballpark. I took my chinese ESR/RLC/transistor tester and measured the inductance and resistance of the original, and some others I had on hand. A Zenith yoke out of a 20BC50 while lacking the taps on the H winding was pretty darn close (~%10 diff at worst), so I tried it out. Seems like it may be a decent temporary solution. I got the H windings reversed, the mount needs to be redone, and there are a LOT of issues in the chassis, but it looks like it can be made to work.

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Old 04-13-2017, 11:05 AM
dieseljeep dieseljeep is offline
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Quote:
Originally Posted by Electronic M View Post
It is definitely a Japanese made chassis. It is likely some of the circuits were licensed from RCA (who else would put 5-6 6GH8s on a chroma board? ), and the one-piece convergence yoke/ mount for the deflection yoke is the same as in most rect RCAs I've seen.

It is a ~17" metal cabinet table top.

I'd guess there were American sets with compatible yokes since so many subs exist. I can get you the specs off the sam's tonight. The vert is two plain windings the horiz has one plain and another with two taps mid winding.

We had two of those sets in the family. Both badged AMC, from Boston Store.
They both had the same problem. The color would be washed out, when cold. After a short while it would be OK. If you cranked the color control up, when cold, it would be OK, but then when it warmed up, the color would be too intense. They just left the color control in the normal setting and it was fine, after a few minutes. Changed all the 6GH8's, but no difference. I've seen the same set, badged as Emerson and Coronado.
A heavy beast. It had more metal in it than a Toyota.
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  #10  
Old 04-14-2017, 09:49 PM
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I think I may not 'need' a yoke anymore (would not mind having the correct replacement though). Yesterday I improved my mounting of the Zenith yoke kludge and dialed in the adjustments better. Now, onto getting the color circuits to work!

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  #11  
Old 04-15-2017, 11:22 AM
El Predicta El Predicta is offline
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My inventory lists a Y-109. If you're still interested,
let me know.
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  #12  
Old 04-16-2017, 11:23 AM
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Great work, Tom! I like that set a lot, ever since I first saw it's picture when you got it! Looks like it was enjoyed a lot.😀
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