Necessary no, but I am eager for my K3 to have a long and productive life, and
cooler
semiconductors are always better. I put some plastic press on feet on the
bottom of the
fan I use, and a screen on the top to keep fingers out so no changes to the K3
cover.
Feeling good is not a bad reason to do things.....
73,
Mark
----- Original Message -----
From: Guy Olinger K2AV
To: Mark n2qt
Cc: elecraft@mailman.qth.net
Sent: Thursday, September 23, 2010 4:03 PM
Subject: Re: [Elecraft] FSK power
The K3 has the best heat dissipation scheme I have ever seen in a 100W
transceiver. Though Wayne and co. don't want to hear about us doing it, some
of us have done the brick on key thing at 110 watts for a long time, and
watched the temp level out in the 50's. Fan comes on, goes to high, and blows
a lot of reasonably warm air out.
Yes, you CAN muck up the top cover and blow more air in if that makes you
feel good. But the prevailing opinion will be that's unnecessary. It would
not be accurate to tell anyone that a top fan is necessary.
73, Guy.
On Thu, Sep 23, 2010 at 3:10 PM, Mark n2qt <n...@verizon.net> wrote:
I've become a firm believer in air flow during rtty contests. I use a 24
volt 5 inch muffin fan
blowing air down into the K3 across the PA fins. I run the fan with about
12 volts which
cuts the noise down somewhat. Looking at the PA temp while doing this, it's
hard to get
it up much over 35C during a contest.
Mark n2qt
>
> NR4C wrote:
>
>> Now, one more. How much power can I safely use with FSK? I have made
>> several contacts so far at about 50 watts. Can I use more? there is a
>> RTTY contest this weekend, and I don't want to damage the radio, but
>> don't want to start off with a weak signal if I can do better.
>
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