[Elecraft] Underside of K3 getting very hot when transmitting

[Kevin]

Jens Køster wrote:
> My K3 100W ser. 1343 gets VERY hot on the underside where the PA transistors
> are connected to the chassis. I´m testing at 100W FM into a dummyload for
> about 3-5 minutes.
>
> Is that normal?
The K3 isn't rated for 100W on FM or any other continuous duty mode, 
according to the latest manual.

"*CW and SSB modes,* 100% 10-min. 100W key-down at 25 C ambient"

You must turn the power down on FM and AM or you will burn the finals up.

-- 
R. Kevin Stover, AC0H

K2/100 #4684
ARRL
SKCC #215
FISTS #11993