[Elecraft] RTTY and best IMD, cooling, etc

[Don Cunningham]

I have several amps I can use and intend to run a lot of RTTY with my K3.  I 
will sell off some of this "surplus", since the K3 is used more than the 
other rigs I have.  I would like the opinions of the group about which path 
I should take.  My Alpha 8410 requires VERY low drive to give 500w plus out, 
in the order of 5 to 7 watts in.  I have other amps, like the PW1, AL-1200, 
etc that require 15w or so to give the same 500w plus out.  Intuitively it 
seems to me that the K3 might like the 15w or so, since the KPA3 is at the 
bottom of its range and the fans can help with the cooling, even though it 
is nearly 3 times the power needed to drive the 8410.  Am I thinking right, 
or WAY off base (as usual, hi).  LS's post this morning got me to thinking 
if his rig gets very warm on the bottom running 5w PSK.  Any suggestions??
Thanks,
Don, WB5HAK