[Elecraft] Tripp Lite Power Supply

[Ron D'Eau Claire]

It's very likely the problem was NOT with the Power Supply, but with a
proper and effective RF ground on 80 meters. 

RF that doesn't find a good ground can do all sorts of odd things to the
mains circuits, especially on the longer wavelengths.

The Tripp Lite might have an extra bypass or two in there, or simply use a
slightly different wiring layout (not even a circuit change - just different
conductor placement) or a different power transformer that allows less RF to
feed through it.

The real "fix" when that happens is to improve the RF ground. Not only will
the problem go away, you'll get out better too <G>.  

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Steve & Anne Ray
Sent: Tuesday, May 18, 2004 11:39 AM
To: Elecraft
Subject: [Elecraft] Tripp Lite Power Supply


I had used a Astron 10A power supply with my K2, and it worked great on all
bands except 80 meters where rf was getting in and it would result in the K2
putting out a very rough signal on 80 meters.  Note, the power supply was
below the desk, so it was not the magnetic field affecting the K2.

I just picked up a Tripp Lite PR10b at Dayton, and it seems to work great
including 80 meters.  Both power supplies use LM323 regulators, what I am
interested in is finding the differences between the Astron and the Tripp
Lite.  I have the schematic of the Astron power supply, but need one for the
Tripp Lite.  Does anyone out there have a copy of the Tripp Lite schematic.
The manual, without a schematic is available on Tripp Lite web page.

Thanks

Steve Ray K4JPN ex K1VKW
EM82ep Warner Robins GA
Elecraft K2 1422 & KPA-100
Heath Fan HW-101, HW-8