Re[2]: HV transformers

-----Original Message-----
From: Jess Askey <jess@magenta.com>
To: vectorlist@synthcom.com
Date: Sat, 16 Sep 2000 13:25:20 -0600
Subject: Re: VECTOR: HV transformers

> MKDUD@aol.com wrote:
>
> > In a message dated 9/15/00 11:33:17 AM Eastern Daylight Time,
> > rlboots@cedar-rapids.net writes:
> >
> > << No, the only difference was the lack of quality control when the
> > transformers were made. Has anyone had a Wintron transformer go bad?
> > >>
> >
> > Only ONE that I've ever heard of, I believe this was Jess' ??
>
> yep, that was mine(WinTron). I belive after getting a replacement one that the
> reason it went had to do with something else on the HV board since
> the new one was also running pretty warm. Im going to replace the
> red mystery can and see if it helps. But... on a sidenote... I took
> apart a 'mystery can' about a year ago and all it contained was air
> core inductors of about 18 turns each. With the way it is potted
> I can't see how anything could go 'bad' in them.
>
> >
> >
> > Jess if your on this, was it your Penn Trans that went or the later model
> > WinTron?? Wasn't it caused by a bad MCI?
> >
> > The modern WinTron HVT's are made VERY well. Aside from only one known one
> > failing, the WinTron people really do stand behind them. Save all your
> > paperwork..
>
> Yes, they are built very well. I took my bad one apart and documented
> everything inside
> including turns on the main transformer. It was pretty interesting.
>

In a raster monitor if you replace the LOPT you check the drive coupling capacitor.

look for any ceramic hi-voltage capacitors related to the HV drive transistor.

also be VERY suspicious of MYLAR capacitors.
DU-PONT dont like people saying this - but mylar can-never be made without defects. they where ok for there time, but i replace them with polyester now.

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Received on Sun Sep 17 16:50:19 2000