WG K8304, is it CGA/EGA?

bryan95502

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I have one of these and it looks to be dual res

I cant find any info on it. Never had any of the K8000 series

I tried it in a test and it synced a CGA game fine.

It has two leads from the anode cup and a complete separate power board..

Any info on this monitor would help!!
 
Sorry for bumping an old thread but it looks like I've ended up with this monitor somehow. It's got a beautiful burn free tube and looks to be almost new. Still no information can be found except on KLOV which isn't much. If you know something please chime in.

Mike
 

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the K8000 wasn't dual res like the U5000 that came after it, as in, you can't just switch the resolution at the monitor. they did however come in either standard or medium resolution; at the time, it was the only "large" monitor Wells-Gardner made (33"), and it was the only 25" monitor in medium resolution.

they offloaded all the power supply circuitry to a separate board in the hopes that if anything went wrong in the power section, you could just swap out that board. it was an ambitious design for its time, but it was plagued with a lot of problems. it was replaced by the U5000 a couple years later, and WG effectively denied the K8000's existence afterwards; it wasn't listed in their support section at all.

what truly sets the K8000 apart from everything else was the isolation transformer it required. I call it a dual isolation transformer, but more accurately, it's just an iso with multiple taps for 120V and 24-27V. the 24-27V is used in the horizontal deflection circuitry. the bottlecap transistor on the power supply frame is the voltage regulator, and it seems to fail a lot. if you ever have a loss of sync you can't adjust out, I would check there.

it used .156 headers for the yoke wiring, and the horizontal (red/blue) part very commonly will burn up eventually and it will cause all kinds of chaos in the power supply. the voltage regulator pops when this happens. I try to replace the headers with the black kind that take more heat.

the last note is that the K8000 was directly succeeded by the U3000, another multi non-switching resolution debacle, albeit powered by a switching power supply board that took wall voltage instead.
 
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