TV tube swap results with pix

[Robran68]

I have a bunch of these 19" TVs that were going to get recycled and decided to show my results using a new chassis with them. I was very impressed with the picture although it was not perfect but at a time of CRTs getting scarce this is kinda promising and not very expensive. This is a low impedance Wei-ya 1220 series chassis with a built in ISO an ran me about $65 shipped from Alva Amusements. The horz coil is maxed out and I was wondering if anybody would know how to hack the board to get the picture a tad smaller. Anywho here it is with the stock yoke and rings in place.

 

[SpartyMAC]

That looks great for $65 bucks.

 

[warmachine]

I have the same chassis connected to a 20" tube from a zenith space command.

You will need an iso transformer for that chassis. Trust me, I had to buy a replacement
after I toasted my first one.

 

[Deadly]

You will need an iso transformer for that chassis. Trust me, I had to buy a replacement
after I toasted my first one.

That's not necessarily true. Depends on what chassis you buy .. and most chassis these days don't need the ISO. In fact every Wei-ya I've purchased does not require an ISO but for convenience factor I removed the power chord and soldered in a regular two pin molex connector to utilize the current connector in the cab. He also stated his model doen't need an ISO.

 

[alexcc]

So what TV did you use? I keep seeing these old 90s model TVs at Goodwill and get tempted to pick one up.

 

[keithsarcade]

Nice. Wish my tube swap went that smooth.

 

[Deadly]

So what TV did you use? I keep seeing these old 90s model TVs at Goodwill and get tempted to pick one up.

Has nothing to do with tube part numbers. You can use practically any tube, measure the vertical impedance on the yoke (usually green/yellow, yellow/white, yellow/black) and order a chassis accordingly.
http://www.8liners.com/datatech/monitor.html <-- alvaamusements.com is cheaper.
Technically this isn't a "tube swap" as usually people find a matching tube for an existing chassis
Be forwarned - if you find a yoke that is low impedance but actually falls beneath the figures used in the above info you'll end up with a slightly imperfect picture. Usually can't get one side adjusted full width.

 

[KenLayton]

The Wei-ya 1220 series definitely REQUIRES operation from an isolation transformer.

As to the width problem there is a width range jumper wire on the main board to select (N) narrower or (W) wider.

 

[Robran68]

The Wei-ya 1220 series definitely REQUIRES operation from an isolation transformer.

As to the width problem there is a width range jumper wire on the main board to select (N) narrower or (W) wider.

My bad, it's a 2620S model! Yes Ken is correct the 1220 does need an ISO. The TV I used is a 1988 Magnavox but I also have a bunch of 1993 Crowley's also. I believe they all have Phillips tubes in them. The yokes in both TV models have a IMP of 14ohms on the vert and 5ohms on the horz which is damn close to a WG7000 yoke but still will not work with a 7000 for some reason.

 

[djw90]

Very Very Cool!!!

 

[cdjump]

i have 2 of these that i bought from 8liners. I'm very happy with the results. Next time i buy one, it'll be from alva since they're cheaper. And, the one's that i bought do require an iso.

 

[Robran68]

Very Very Cool!!!

These are the TV tubes I'm giving away in my other thread.

 

[WadeLanham]

Damn, I need to do this as a replacement for the exact same game - my Moon Patrol!

Wade

 

[Leinhit]

someone should do a video of this if not done already..

complete w/ the test of the ohm test of the yoke...

 

[descrentl]

Good job Rob. Looks great. I have an old 19" TV ive been meaning to try this on.

 

[Robran68]

Good job Rob. Looks great. I have an old 19" TV ive been meaning to try this on.

I might have a few extra TVs if you want one with this exact tube.

LMK