[AMRadio] High Voltage Power Supplies


Rev. Don Sanders innatehealing at bigplanet.com
Sun Oct 30 10:24:35 EST 2005


OK Bry, You got my interest. What is the part number and are they from
Mouser? I know I need several for my boatanchors and my 2 Astrons(20 and 35
amp).

Healthfully yours,
                          DON W4BWS
----- Original Message ----- 
From: <bcarling at cfl.rr.com>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Sunday, October 30, 2005 7:27 AM
Subject: Re: [AMRadio] High Voltage Power Supplies


> On 30 Oct 2005 at 9:08, Ed Swynar wrote:
>
> > Is this the reult of transients / voltage spikes somehow "overwhelming"
> > the diodes...?
>
> Probably - why not try one of those transient suppressors (varistor I
think)
> on the primary side of your power tranny?
> I just put one in my Astron 35M and it eliminated the "THUNK!"
> at power-on.
>
> A number of guys have put them into Johnson xmtrs with similar
improvement.
> Maybe it could save your diode strings.
>
> Do you have a capacitor-input filter on the p.s.u.?
> Choke input filters tend to be a bit kinder to the rectifiers.
>
> 73 de AF4K, Bry
>
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