WTB: K7000 (or other 19") monitor (NorCal)

Your ms pac monitor is a k4900. That neck board won't work. It has to be one from k7000. Very few k7000 19 chassis's came with 10 pin neck boards, every k7000 25 inch chassis that I've seen has the 10 pin neck board. If you can't find one local, I can probably part with one of mine. How ever you mentioned that you picked up a few TV's. Have you checked the others to see is there's an 8 pin neck one?
 
Ok I see. I get that the K7000 may need a K7000 25in 10 pin neck board for that one - but the pic I just sent is the K4900 chassis and neck board - everything, and then the new monitor. Do you think this new monitor dropped into the K4900 setup will work? So I've got 2 monitor swaps on the go here.

And yes, I'll dig around and see about a k7000 25in neck board - if you can part with one, that would be awesome.

Also, all 6 19" tvs are the exact same model - apparently pretty much new and seemingly good candidates...

thx for the help!
 
Your going to have to figure out how to measure the yokes for ohms, that's how you match them for tube swaps. Regarding the k4900, your chances are slim to none that you will find a direct swap. You can use the yoke from the k4900 on your donor tube but then your getting into aligning the yoke and convergence. These things are not easy at all. This is why the K7000's are so easy to swap, most 19 inch tv's have almost the same yoke measuments so no need to swap the yoke or worry about convergance.
 
I see - ok, great to know. So for the K4900, what tube should I look for as a replacement? Are there known monitors that work, or am I best to find an original, and what would that be?

Or would it be best to just find a K7000 chassis and board and just swap that out with another tube?

cheers
 
If your going to try to find a tube to direct swap the k4900, you need to look for really old 1980's type tv's and even then maybe 1 out of 100 might be the one you need. You would have better luck trying to learn how to converge one after swapping the yoke. Again, its not easy. It requires alot of patience and time. There should be videos showing how to converge tubes, look some up and you will see what I mean.
 
Ok, I see - well if it's that tough, I won't bother. If I can get these tubes that I picked up to work with a K7000 25in 10pin board maybe I would just pick up some of those...
 
The K7000 is definatly a good monitor to start learning the process. Once you master swapping K7000's, you can apply that knowledge to other types of monitors.
 
You should try measuring the HZ and the vert on your k7000 yoke and then the yoke on your replacment tube.

Put your meter on the ohms setting. Positive and negative do not matter for this. On the connector that comes off of the yoke, put your probes in the connector in the 2 on the right, then the 2 on the left, write down those measuments and then do the same on the replacement tube. They should be pretty close to a match. Then try the k4900 and you will see how different that yoke is. Once you know how to do this, you can easily check any tube you come across.
 
I see. Cool. I came across this online doing research, so kinda understood what was going on.

For the replacement, assuming it's a tv - can I get the right ohm reading with it still in it's case, with the back out and it powered through a wall socket connection?

Unfortunately I canned the one I necked, and the old ms pacman is unconnected. But I will definitely make a note to check these out - thanks for the info!
 
@Kevsarcade - I didn't remove the yoke, but snipped the connectors that remained. Would I need something on the yoke itself?

@acbluden2 - I would be interested. I have a number of games that I've restored and I'm looking to swap out some burned tubes. Is your K4900 with the tube, etc?

thx
 
If the replacment tube doesn't have the same yoke connector, you'll need to splice the old one on it which is usually the case. In the future always save original arcade tube yokes.
 
@acbluden2 - I would be interested. I have a number of games that I've restored and I'm looking to swap out some burned tubes. Is your K4900 with the tube, etc?

thx

Comes complete. Came off a Moon Patrol cab. Let me get it on a test bench in the next week or so so you can see snaps of it in action. Do you ever make down south a bit from where you are? Asking just in case we work something out.
 
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