Re: Ampliphone HV-other options?!

Uh, what exactly are we building high voltage supplies for?
Keltron replacements? B&W? Color vector? Amplifone?

It would be helpful to know what to design FOR.

Zonn wrote:

> On Fri, 11 Jun 1999 13:04:48 -0500, "Keith, Brendan" <Brendan.Keith@wilcom.com>
> wrote:
>
> >Why not just create a stripped down version of the 4600 chassis with only
> >the Horiz Osc, HOT, associated stuff, and an inductor to simulate the yoke?
>
> That'd be quite an inductor!
>
> Now your talking about the John R. hack.
>
> Unfortunately you need just about everything on the chassis to run the HV.
> Everything is inter-twined, all part of the horz and vertical sync stuff.
>
> I'd like to use the parts on the newer K7000 series monitors, since they'll
> probably be supporting those for some time to come. The Focus/G2/HV_diode as
> all part of a single assembly is also nice for mounting this thing (you won't
> have to deal with arcing around the diode, etc.)
>
> If start with one monitor's components (K7000 series) I can use the same drive
> transistors (the one going into the horz drive xformer, and the horz output),
> the same horz drive xformer, and flyback, and know they're all rated to work
> with each other.
>
> On these monitors it'd be hard to unwind all the sync/raster stuff from just the
> basic HV generation stuff. I'd also like to raise the HV frequency to
> ultrasonic. The HV regulator IC looks like a specialty item and does more than
> just regulate the HV's low voltage supply. I'd like to keep the special order
> item count as low as possible. I'd like to float a LM723 with a hefty pass
> transistor to regulate the 123v supply. They're very easy to get.
>
> >Run it straight off the line voltage = less stress on the xfmr assembly.
>
> I'd definitely want to take the stress of the low voltage vector supply, but I'd
> like to run the HV through an isolation transformer, if for no other reason but
> safety.
>
> -Zonn
Received on Sat Jun 12 14:36:41 1999