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  #1  
Old 10-15-2017, 05:27 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Rca 21D641 HV issue.

So I have replaced the filters to start off and that is all the work I have done so far just so I can get a baseline. With no yoke plugged in I pull about maybe 7 kv (I have a shorting bar in the socket so hv will come up.), but when i plug in the yoke and power up the set the hv droops to 100v with brightness at max and 2.8kv with brightness at minimum. I have a bad feeling my yoke may be bad. I ohmed out the yoke and the results were inconclusive. The vertical section reads normal, but when i measure the horizontal winding I get maybe 6.9k wit the target being 29 ohms(provided I am measuring the right pins). Not sure if my yoke may be bad or not. Here is a picture of the yoke from what I gather vertical winding is from pins 1 and 2 and the horizontal is from pins 8 and 4. Your thoughts?
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File Type: png YOKE.png (47.0 KB, 28 views)
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Last edited by SwizzyMan; 10-15-2017 at 06:26 PM.
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Old 10-15-2017, 07:55 PM
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Restoring an admiral c322
 
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oops. I posted in the wrong fourm. Wasn't paying attention when I wrote this up. Could someone move this to early B&W?
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Old 10-16-2017, 10:02 AM
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SwizzyMan SwizzyMan is offline
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I think the ETF may have a new yoke for this set. Can anyone verify if my yoke may be bad before I buy the new one? From what I gathered, my yoke is bad.
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Old 10-16-2017, 10:55 AM
Tom9589 Tom9589 is offline
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Measure between pins 4 and 5 and then from pins 5 and 8. They both should read the same and about half of the total spec of 29 ohms.
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Old 10-16-2017, 11:14 AM
dieseljeep dieseljeep is offline
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Quote:
Originally Posted by SwizzyMan View Post
oops. I posted in the wrong fourm. Wasn't paying attention when I wrote this up. Could someone move this to early B&W?
Always use chassis numbers! Model numbers don't mean squat to us old timers.
I'll look up the model number in Riders. I might have a good used yoke.
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Old 10-16-2017, 11:26 AM
dieseljeep dieseljeep is offline
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Always use chassis numbers! Model numbers don't mean squat to us old timers.
I'll look up the model number in Riders. I might have a good used yoke.
According to Riders, it's a KCS97 chassis. With a good CRT and a recap, it's an excellent performing set!
It's a 90 deg yoke, don't have one I can spare! Dave.
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Old 10-16-2017, 11:39 AM
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SwizzyMan SwizzyMan is offline
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Quote:
Originally Posted by Tom9589 View Post
Measure between pins 4 and 5 and then from pins 5 and 8. They both should read the same and about half of the total spec of 29 ohms.
5 and 8 read 9k and 4 and 5 read 700 ohms. Now I am pretty sure the yoke is bad.
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Old 10-16-2017, 12:48 PM
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Eric H Eric H is offline
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I may have one. Got some. NOS stuff in a box, can anyone come up with a part number, Stancor, Merit, Triad?
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Old 10-16-2017, 01:00 PM
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SwizzyMan SwizzyMan is offline
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Quote:
Originally Posted by Eric H View Post
I may have one. Got some. NOS stuff in a box, can anyone come up with a part number, Stancor, Merit, Triad?
Stancor DY-16A Merit MDF-92 Triad Y-41-1

If you can find one eric, I'll take it.
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Old 10-16-2017, 01:13 PM
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Y41 sounds familiar, I’ll check when I get home this evening.
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Old 10-16-2017, 02:36 PM
Tom9589 Tom9589 is offline
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Where are you reading the yoke resistance? On the octal plug or on the yoke terminals where the wires attach? Try reading on the yoke itself - the person soldering the octal socket might have been having a bad day.
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Old 10-16-2017, 04:49 PM
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SwizzyMan SwizzyMan is offline
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Testing the yoke from the actual yoke terminals with the ring tester reveals it is BAD. I need a new yoke ASAP, this project has to be finished before November. Eric, if you have it consider it sold.
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Old 10-16-2017, 07:59 PM
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miniman82 miniman82 is offline
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Before you assume your current yoke is beyond repair, how about trying to repair it first? Iíve seen yokes before that had some corrosion on the copper wires near where they join to the solder lugs, and a cold solder joint isnít outside the realm of possibility either. Poke around, not like you have anything to lose at this point.
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Old 10-16-2017, 08:50 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Quote:
Originally Posted by miniman82 View Post
Before you assume your current yoke is beyond repair, how about trying to repair it first? Iíve seen yokes before that had some corrosion on the copper wires near where they join to the solder lugs, and a cold solder joint isnít outside the realm of possibility either. Poke around, not like you have anything to lose at this point.
The windings that fit on the tube neck have an area of corrosion and I believe i see a broken wire and almost all the varnish on those windings are gone so its shorting too. Its dead.
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Old 10-16-2017, 09:05 PM
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Eric H Eric H is offline
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Okay, I found one, a Triad Y-41 (no -1 suffix) assuming it's in the right box (check pictures) it's a 90 deg yoke, 24 Ohm horiz 39 Ohm Vert.

It looks new although some of the soldering on the inside looks a little rough, possibly someone installed the Network components since they seem to be there. There is a small chip in the Bakelite that won't affect anything, there is no cover because they never came with one.

It's yours for shipping.

Due to my work schedule I won't be able to ship until Thursday.
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File Type: jpg yoke1.jpg (38.7 KB, 26 views)
File Type: jpg yoke2.jpg (34.1 KB, 18 views)
File Type: jpg yoke3.jpg (45.3 KB, 18 views)
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