TV tube A48AAB37X - useable?

Spunkmeyer

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I have a 19" TV (Sanyo AVM-1906) with the tube number A48AAB37X inside. I looked on the Donor TV page and did not see a mention of it.

I have a 19K4901 monitor (current tube 19VLTP22) that needs a cap kit, and has severe burn-in, so it seems like this would be a great opportunity to have both done at one time.

Can anybody help? I'm in over my head on this. If not, the TV will make its way into a yard sale in a few weeks... thanks in advance.

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Well, for starters 'A48' equals 19" tube, so far so good. Next we look at the pinout, it appears to be a CR23 / 6.3v compatable tube, that is good also. Now you need to do some work...

Pull the yoke connector(s) off of the monitor chassis and test the windings with a multimeter. Test for resistance, and you should get two sets of readings. Report back with those readings...
 
Now you need to do some work...

Pull the yoke connector(s) off of the monitor chassis and test the windings with a multimeter. Test for resistance, and you should get two sets of readings. Report back with those readings...

Get the readings off of both the TV set and the 4901? And do I need to discharge each before doing these readings?

I have never worked on a monitor before, so please excuse the stupid questions. I want to learn how to do this, and I want to do it the right way.
 
Well, I just meant the TV set but if you do both it will make things slightly easier for me.

You do not need to discharge anything. You are not touching the high voltage area of the monitor/TV. However, both should be off...
 
Thanks for being patient with me on this and answering my rudimentary questions.

On the TV tube:
Horizontal (Red/Blue): 4.8
Vertical (Yellow/Green): 15.4

My arcade monitor is buried behind a wall of stuff right now so I probably won't be able to get to it today. But, I did find this info on the http://www.junknet.net/donor-tvs site:

19" Wells-Gardner K4900
tube: 19VLTP22
Horizontal: 2.6
Vertical: 34.6
 
Well, good news and bad news. The tube is useable but it will not be a drop in replacement.

You will have to swap yokes in order to transplant the tube. This is not overly difficult but it is time consuming and requires you to be able to generate certain test patterns the procedure(s) for static convergence and centering the yoke are in the WG manuals if you'd like to look it over.
 
Well, good news and bad news. The tube is useable but it will not be a drop in replacement.

You will have to swap yokes in order to transplant the tube. This is not overly difficult but it is time consuming and requires you to be able to generate certain test patterns the procedure(s) for static convergence and centering the yoke are in the WG manuals if you'd like to look it over.

Thanks for the confirmation... I was afraid that was going to be the case given the disparity between the two tubes. I do have the 4901 manual PDF, so I know what you're referring to for the convergence adjustments.

I might see if any local KLOVer who's done this before may want to walk me through/help me tackle this, or I might decide to just put it back together and in the yard sale. :)

EDIT: I'll probably pull out the other monitor and test its readings firsthand, if nothing else it's another round of practice on a monitor for me...

Thanks again for your help!
 
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