Paul,
Once you get it working, it would be straight forward to lay out a few
PC boards so others could do what amounts to a kit build. I would
suggest a primary module with a separate PWM controller board that
mounts to it with a single row Berg header and a secondary module to
handle the rectifiers and filter components. That's 3 easy to build
boards. I wonder how many folks would be interested in a build it
yourself kit based around pre wound transformers adn these boards and parts?
Tomm, KD7QAE
Paul Decker wrote:
> Hi Mike,
>
>
>
> Yes, Tim Hulick, W9QQ went SK in late 2007, he was the owner of
> wattsunlimited.
>
>
>
> Over the past few months, I have been building a HV switch mode power supply
> based on his February 1991 QEX article. I haven't quite gotten to the stage
> of actually powering it up with full voltage yet, but I am close (this
> weekend looks good!). A ll the components are wired up in their respective
> modules. If you do a search, you can probably dig up the article. If not,
> let me know.
>
>
>
> Not to talk you out of it, but to be honest, for me, if I were to do it
> again, which I hope I will, I would go for a linear power supply unless there
> is a dire need for weight control. The switcher I am implementing is very
> simple, but still far more complicated to build than the traditional power
> supplies.
>
>
>
> Regards,
>
> Paul, kg7hf
>
>
>
>
>
>
>
> Message: 3
> Date: Tue, 19 May 2009 15:40:43 -0500
> From: mikea < mikea@mikea.ath.cx >
> Subject: [Amps] Source wanted for HV switch-mode power supply
> To: amps@mikea.ath.cx
> Message-ID: < 20090519204043.GA897@mikea.ath.cx >
> Content-Type: text/plain; charset=us-ascii
>
> (maiden post here)
>
> I've just got a Burle 8791, socket, chimney, and whatnot, and am looking
> hard at building an amp. Does anyone know a good source for a suitable
> switch-mode power supply -- 2500 V DC at about 750 mA?
>
> I've talked with Ralph W5JGV, but he's going to be taking care of a
> medical disaster for some time and not able to do custom construction.
> I really want to avoid big iron if possible, to keep cost and weight
> down. If at all possible, I'd like one that can be turned on when I hit
> the mike switch or key the first DIT or DAH, rather than one that takes
> a few seconds to soft start. Watts Unlimited had precisely what I want,
> but the proprietor appears to have gone SK.
>
> I'll also be looking at 2 KV supplies at .5 and at .25 A for a VHF amp
> (2 x 4CX250B) and a UHF amp (single 4CX250K) later on.
>
>
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