[Elecraft] New Output Power Issue

[Twan at pa0kv.nl]

Bad regulated power supply.
I use a MANSON EP-925 (also known with other brand names).
This handles 25 amps easy with just a few 0.1 of voltage drop.
After some successful mods it is stable within 0.05 V RX/TX 100 Watt at 13.80 Volt.
(If interested see my mods at http://pa0fri.home.xs4all.nl/Diversen/EP925/ep925eng.htm)

Merry X-mass and a happy new year to you all.

Twan - PA0KV

K3 -1770
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Date: Mon, 24 Dec 2012 10:18:27 -0500
From: Ian Kahn - Ham<km4ik.ian at gmail.com>
To:elecraft at mailman.qth.net
Subject: Re: [Elecraft] New Output Power Issue
Message-ID:<50D87243.5030509 at gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Update on my low output issue:

I ran the TX Gain Calibration this morning, and everything passed with
flying colors.

I am seeing about a 4-4.5V drop across the radio when going from rx to
tx.  Rx voltage sits at 13.8V, but when I transmit, voltage across the
rig drops to between 9 and 9.5V.

All tests performed while tuned into a 300W dummy load.

Before I tear into my rig and start looking for corroded tin pins on the
PA board (K3 #281, so unlikely the board was replaced/mod performed), is
there anything else I should test while my station is still all together
in one piece?

Thanks to everyone for the assistance, and Merry Christmas!

73,

--Ian

Ian Kahn, KM4IK