G05-802. Has an 801 EHT and 802 deflection??

DJMN

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So I'm recapping a G05-802 from my Asteroids. Finished the deflection board (issue 2) and went to do the EHT and I notice it's an 801 issue 5 board. I thought 801 and 802s were not interchangeable?
Is this common/ok?
The monitor was technically "working" when I got it but had a vibrating picture problem (see pic). I thought I'd start with the caps and reflowing headers.
 

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There are methods for using an 802 HV cage in an 801 monitor. I haven't seen anything documented about going the other way, but that's not to say it may not be possible, with some modifications. I can neither confirm nor deny the possibility, but you might want to look closely to see if the HV cage has been modded at all.

Here's the link for going the other way:

http://forums.arcade-museum.com/showthread.php?t=262953


I haven't checked the schematics to see if/what would be needed to put an 801 HV in an 802 monitor, so I can't say offhand how different they are.
 
Hmmm, well as far as I can tell there has been no modifications to the 801 high voltage. (See pics) Makes me wonder if the previous owners 802 HV crapped out and they just thought they could slap in an 801s? I'm surprised it worked as well as it did.
If this can't be made to work, is it easier to obtain an 802s HV cage or go the other way and turn it into an 801?
Thanks
 

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It'll be easier to get an 802 cage. The 801 has three separate PCB's for power, deflection, and HV, thus a different monitor harness as well (and it requires a different brick in the cab, as it uses different supply voltages.) The frame is also different, to mount the 3 separate PCB's, plus a dedicated heatsink for the deflection transistors.

IMO, the 801 is a better-designed (and overdesigned, really) monitor. You also see far fewer of them failed, which I attribute to the design. Separating the power and deflection to two separate boards moves the heat-generating parts away from the sensitive deflection parts, which is a weakness of the 802, v2000, and 6100 (as many of the active components get cooked by hot resistors that are too close to them). They're all good solid monitors when rebuilt, but the 801 I think was overdesigned (as it was their first model), and they cut back in a few areas to save cost on the subsequent vector monitors.

Anyway, I digress... But you just want to get an 802 HV cage.

(I have them btw, for $125 shipped, with 6-month warranty. PM if interested.)
 
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