U5000 and K7000 compatibility?

jimbodeanny

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Fired up my newly acquired T-MEK tonight and it appears that the monitors are both Wells; one is a U5000 (2550) and the other is a K7191. Both monitors work just fine and both produce decent pictures, but side by side the image of the U5000 looks much nicer (sharper) than the K7191. I'm assuming this is because the U5000 is a dual res (medium/standard) whereas the K7191 is standard res only?

I was planning on capping both monitors, but my question is can I buy another U5000 chassis and through it on the K7191 tube? (I'm trying to get these two pictures to look as much the same as possible.)

My other question is, where's the best place to buy FULL cap kits for these monitors? I've always ordered from Bob Roberts in the past, but I've heard there are some sources out there that contain higher quality caps and every replaceable cap the monitor chassis has on it.

Thanks

-Jim
 
No, you can't throw a U5000 on a K7000 yoke.

And it shouldn't matter that the U5000 is dual res, because both monitors are running in the same resolution.

If anything, you probably just need to adjust them to balance them out, or even rejuv the one that looks "worse" to brighten it up. The K7000 may need a new flyback also if it has cracks around the focus/screen knobs...
 
And it shouldn't matter that the U5000 is dual res, because both monitors are running in the same resolution.
It's a pretty well known fact that a tri-res chassis doesn't look as good in 15khz as a 15khz-only chassis. I have no idea if this applies to dual-res chassis or not.
 
It's a pretty well known fact that a tri-res chassis doesn't look as good in 15khz as a 15khz-only chassis. I have no idea if this applies to dual-res chassis or not.

Not that I've seen. Since the same tube/yoke was used for the standard-res U2000 and K7400, it shouldn't be a problem here.

And on a side note, I've had a dual-monitor cab with the exact same monitor in both sides and had issues with one looking better than the other, even with both fully rebuilt and rejuved. it just seems that it always happens, and the best you can do is adjust them both to get them as close to matching as possible, even if that means downgrading your "good" one a bit to match the "bad" one...
 
Gotchya. That's what I figured.

Well, I'm going to start with a cap kit and go from there.

So where's a good place to buy FULL cap kits for these monitors? I've always ordered from Bob Roberts in the past, but I've heard there are some sources out there that contain higher quality caps and every replaceable cap the monitor chassis has on it.
 
The Bob Roberts kit will have everything you need and be just fine. It doesn't have the filter cap and the NP caps, but you most likely don't need them - and most (all?) places don't include them. Pick up a flyback at the same time if you need one...
 
The Bob Roberts kit will have everything you need and be just fine. It doesn't have the filter cap and the NP caps, but you most likely don't need them - and most (all?) places don't include them. Pick up a flyback at the same time if you need one...

Ok sounds good. One more question...

The K7191 picture seems to have a very slight problem with the vertical hold. The picture makes a very small and very slight "bounce/jump" vertically about a quarter inch every so often (sometimes a time or two every couple seconds, sometimes once every 10-20 seconds.) I tried playing with the vertical hold, but couldn't fix it. So I'm thinking about ordering the K7000 repair kit from Bob Roberts hoping something in the kit will fix that. Is this a good measure to take or does this sound like something the kit won't fix?

Thanks again

-Jim
 
It might fix it if it's related to a cap or solder issue (you have to go over the chassis for solder/trace repairs too). If it's related to a bad pot or video processing IC, then it won't fix that particular issue...
 
dont forget to check that chassis for cold solder joints on the header pins, and make sure the edge connector of the mainboard is clean/good contact.

the rest is adjust, adjust, adjust lol.. Oh one more tip, clean the face of the tube and the bezel. You would be amazed at the krap that gets built up there over the years.
 
Just one last thought: The U5000, being dual res, likely has a finer dot pitch in its shadow mask. That'll make it look pretty different, especially up close.
 
Just one last thought: The U5000, being dual res, likely has a finer dot pitch in its shadow mask. That'll make it look pretty different, especially up close.

Since the shadow mask is in the tube, and the K7400/U2000/U5000 all used the same tube and yoke, I don't think that has anything to do with it. if that were the case, then the standard-res setting on the U5000 would look like shit...
 
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