Wells Gardner 7302 Tube Swap.

Long Hair

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This is my second successful tube swap attempt. Here is some info that might help someone else in the future. First, the wells 7302 19" chassis I have has a 10 pin socket (cr-23) and needs a yoke reading of 2 ohms horizontal(red and blue) and 14 ohms Vertical(yellow and green). I have a Orion t.v. model no. tv1929 that has a yoke reading of 3.2 and 14.2. So this should be close enough, but it has a 8 pin socket (cr-31). I started looking at the wells neck board and noticed two different sets of solder points, one for 19" and one of 13".(19"= 10 pin and 13"=8 pin). I needed a 8-pin socket for the Orion tube, so I thought what the hell I desolded the 10 pin socket and replace with the Orion 8-pin. Hooked it all up and I got a blue screen, so I wired up Mortal Kombat and had a good pic, but no green. After farting around a little bit I switch the red and green input wires and now I have all the colors and the picture looks great. Something I noticed on the orion 1929 there is a wire that plugs-in to the neckboard from the yoke with the degaussing coil.Do not ground this wire, all you"ll get is clicking noise from the chassis. Hope this help's someone.
 

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That looks great, well done. Lucky no damage was done when you grounded that wire.

Thanks Hewitson, I was thinking that wire shouldn't be grounded, but on the original neck board it was grounded with the coil. Here's a pic of the monitor in my Galaxian. It looks 1000 times better than the original k4500 with an almost white burned-in screen.
 

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Point of clarification on this: the CR23 socket is the 10 pin, and the CR31 is the 8 pin.

CR 23 = fat neck (10)

CR 31 = skinny neck (8)
 
Just picked up an identical Orion TV, Model no. TV1929 and will be doing this soon. :)
 
Just picked up an identical Orion TV, Model no. TV1929 and will be doing this soon. :)
Good luck, I found a Orion 1925 and had to swap the yoke. The bad part is the yoke and rings are bonded together.I made it work,but it's a real hack job.
 
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I'll clarify this a little further, the tube and yoke assembly from a vision pro mtg 1901 is a direct swap with the 7302 chassis and vise versa. You may have to change neck boards but there's no yoke swapping required.

There, I've said it again for the millionth time
 
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