Can I use this Chassis with this Tube?

Mike Washington

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I have a spare 27" RCA tube # A68AEG25X03 which is from a Neotec 2702 and I have a Wells Gardner 27K7502 chassis.
Can these two be combined to make a working Med-Res Monitor?

Thanks
Mike Washington
 
Maybe. The tube is a possible match for the chassis, but do you have a yoke with the WG chassis? I am not familiar with the Neotec yoke, so I don't know if it is compatable with the WG chassis. Can you take a couple of resistance readings of the Neotec yoke horizontal and vertical coils and post the results here?


Also, many of the newer monitors came with bonded yokes, so if you need to swap yokes you will need to break the adhesive bond in order to remove the old yoke. Arcadecup posted a video a while back on how to do this.
 
Maybe. The tube is a possible match for the chassis, but do you have a yoke with the WG chassis? I am not familiar with the Neotec yoke, so I don't know if it is compatable with the WG chassis. Can you take a couple of resistance readings of the Neotec yoke horizontal and vertical coils and post the results here?


Also, many of the newer monitors came with bonded yokes, so if you need to swap yokes you will need to break the adhesive bond in order to remove the old yoke. Arcadecup posted a video a while back on how to do this.

I am a newb with this stuff. I purchased a monitor complete and am having a problem shipping it.....Hence, the chassis question.
How would I take resistance reading. I have a Multi- meter.

Thanks
Mike Washington
 
Set your meter to read resistance (may be labeled ohms or with an omega symbol). Find the yoke wiring connector(s) and test from one wire to the next, usually they are grouped together red with blue and green with yellow but sometimes the color combos are different. You should get two different readings that will be somewhere between 0.5 ohms and 80 ohms.

If you test across the wrong pair of wires you shouldn't get a reading at all and it will not damage anything doing this so don't worry too much about that. Also, since you are measuring resistance you don't need to worry about which lead goes to which wire.
 
Yoke

Here is a picture of the yoke:


Thanks
Mike
 

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Yoke

The values fluctuate a bit.

Red-Blue is about .6-.8

Green-Yellow is about 8.0-9.0

Thanks
 
I haven't been able to find the info on the K7500 yoke yet. I thought the data was on Orion3311's page but I can't access it, I don't know if it is down or company restricted. Here is the link, maybe you'll have better luck: http://www.junknet.net/donor-tvs


If you can get there look for the data on the U5000 (or U2000, K7400). I know the U5000 was not compatable with the 7500, so if your numbers match the U5000 then they will not work with the 7500.
 
What is wrong with the Neotec chassis that is on it? chirp chirp chirp? Cap kit, hot, flyback and c423 and you should be able to get it running.

Then you can sell me the 7500.
 
Neotec

What is wrong with the Neotec chassis that is on it? chirp chirp chirp? Cap kit, hot, flyback and c423 and you should be able to get it running.

Then you can sell me the 7500.

The Neotec is a VGA Monitor and I need a Med-Res Monitor..........

Mike
 
I just checked my U2000 and U5000 monitors and here are the results I got:

U2000 - 5ohms and 10ohms*
U5000 - 4ohms and 12ohms*


This doesn't help you much, but it does show that the yoke you have is not compatable with the U2000 and U5000, which are also not compataboe with the K7500. You should try to contact Chad at The Arcade Cup. I believe he repairs the K7500 and should be able to get the measurements you need.





*These measurements were taken with an analog meter with a fairly vague scale therefore these numbers should be used as a reference only.
 
Not sure about your neotec tube, but both of mine have the yoke cemented to the tube with a red epoxy like glue. Not removable without possibly breaking the tube.
 
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