The QEX article on his supply does
not seem to be available for download
on the ARRL site.
It's the February 1991 issue. Anyone know
where I can find it ?
Tnx, Dick, W1KSZ
On Thu, Feb 29, 2024 at 8:04 PM Steve Harrison <k0xp@k0xp.com> wrote:
> Tim Hulick, that's the W9 whose name I was trying to remember (still
> can't recall his call, though). He started with an article in QST IIRC
> around the early '90s that grew into a two- or three-part early or
> mid-90s QEX full-details article on the design of his switching power
> supply. I felt the loss keenly when he passed, as we corresponded
> extensively and he was always very helpful and kind. His stories of his
> exploding FETs and IGBTs were something to read 8-).
>
> Steve, K0XP
>
>
> On 2/29/2024 5:48 PM, jtml@losalamos.com wrote:
> > Yes, i remember the 2017 design. The earlier one, the 8877 amp with
> Watts Unlimited power supply, is likely not available anymore since Tim
> Hulick is SK.
> >
> > John
> > K5PRO
> >
> > On Feb 29, 2024, 3:39 PM, at 3:39 PM, Joe<nss@mwt.net> wrote:
> >> Nope the one I remember is Jan of 2017
> >>
> >> Joe WB9SBD
> >> .
> >>
> >> A Contest 40 Years in The Making!
> >> <https://w9et.com/home.html>
> >> MAIDENHEAD MAYHEM
> >> https://w9et.com/home.html <https://w9et.com/home.html>
> >> On 2/29/2024 4:07 PM, Paul Decker wrote:
> >>> John,
> >>> Is this what you are thinking of?
> >>>
> >>> https://www.arrl.org/files/file/Technology/6Mhanson8877.pdf
> >>>
> >>> Paul.
> >>> KG7HF
> >>>
> >>>
> >>>> Message: 1
> >>>> Date: Thu, 29 Feb 2024 11:00:56 -0700
> >>>> From:"jtml@losalamos.com" <jtml@losalamos.com>
> >>>> To:amps@contesting.com
> >>>> Subject: [Amps] High Voltage Switching Supply
> >>>> Message-ID:<081961a2-8f35-4c0d-8651-18f0560c6cca@losalamos.com>
> >>>> Content-Type: text/plain; charset=UTF-8
> >>>>
> >>>> I thought there was.a design on QEX at one time. But maybe it was
> >> QST?
> >>>> There are some consumer microwaves that use AC/DC converters in
> >> switchmode.
> >>>> We have commercial 10 kW Glassman switchers at work that put out
> >> 1500 VDC at 6 Amps but they are not cheap. They power screen grid on
> >> TH628L RF tube.
> >>>> John
> >>>> K5PRO
> >>> _______________________________________________
> >>> Amps mailing list
> >>> Amps@contesting.com
> >>> http://lists.contesting.com/mailman/listinfo/amps
> >>>
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> --
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