RE: 19K6400

> When you say "modyfying", how drastic were you thinking? Since the
> operating voltage is different, you would need a new power isolation
> transformer. Plus the HV PCB is quite different since it only runs on
> positive.
>
I was thinking:

1) new transformer for 40-0-40 power (or whatever is needed)

2) double up transistors/Deflection board modifications + the LV2000
(maybe with another little regulator or zener to raise the adj leg to
allow regulation over the higher voltage)

3) HV supply. Got two ideas here. Plan "A"-- rework it for +48V
operation (Which didn't actually sound too bad from Dave's original
write-up). Plan "B" Just make a split voltage regulated supply and run
it off the "original" voltages. I haven't tested this theory yet, but
I'm thinking that since I don't need deflection current coming off this
guy I might get away with just some heat-sinked TO-220 regulators.
(~1.5amp) Anybody know what a HV cage draws?

> I am not convinced that mearly doubling up the deflection transistors
> (which was done on the 6400) will improve the monitor. However,
> increasing
> the supply voltage and thus the speed of the monitor could be
> interesting.
>
We've got a variable transformer here at work I'm kinda tempted to
borrow and mess around with once a "WG6399" has been put together. See
how "low" I can go and still get acceptable Sega XY performance.

-Clay
Received on Thu Jan 22 16:27:05 1998