How to check if a yoke is U5000 compatible?

Teknotoyz

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I found some WG 25" EGA tubes and I am looking to install a U5000 chassis.
I am reading that the K7500 yoke cannot be used.

The question becomes:
How do I know if I have a U5000 yoke vs a K7500?
Is it a matter of measuring the resistance or is there something else?

I need a quick answer as I have never done a yoke swap and am a bit shy on doing one. I may be driving to get the tubes this evening if it looks good.
 
you ohm out the coils on the yoke and compare it to the one you want to swap. if it is close you might not need to swap yokes, but i have never been close and always had to swap.
 
Does anyone have the values measured for the yokes? Are they wildly different, or somewhat close? I may be picking up a K8000 tube so it may be moot anyway on the K7500. Course it's all dependent on wether the tube has the right pins and neck size.
 
The K7400, U2000, and U5000 all use the same yoke, which would have a label on it of 009A2988-001. The K7500 uses a different yoke...
 
ohm out the green and yellow wires on both, compare. ohm out the red and blue wires, compare. use the lowest ohm setting, it's only going to be a few ohms.

while it's true that all those Zenith tubes were all roughly the same, the resolution difference is where the yokes are going to be different I guess. which is very confusing, cause people say the U5000 and K7500 don't have the same yoke, yet there was some models between the U2000 (standard res only), U5000 (dual res), K7400 (standard res only) and K7500 (medium res only).

you'll just have to see. the K7500 came on either Zenith or Samsung tubes... with the Samsung being the better of the two. by that point in Zenith's production cycle, their tubes were absolute garbage, they almost always need rejuvenation.
 
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