[Elecraft] FSK power

[Mark n2qt]

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 at 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 <n2qt at 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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