[Elecraft] K2/100 and MFSK?

Ron D'Eau Claire [email protected]
Fri Feb 7 01:26:01 2003


The KPA100 manual specifies 40 watts for data modes in general with a
note in the errata suggesting 25 watts for high duty cycle modes like
MFSK. 

The system is VERY robust. Eric wrote about the KPA100 final transistors
recently:

We designed them to handle way more than you will normally hit them with
in a 
processed SSB conversation. In the case of the K2/100 the finals can
handle a 
significantly higher temperature than we let them go to in firmware. The

heatsink and PAs are Ok even when the heatsink is almost too hot to
touch. At 
that point we still have a 50 degree safety overhead on the transistors
and 
will reduce power automatically before we get much closer to that point.
I've 
never seen that happen in normal or contest operation.
-----------------------------------------------------------------

I have done some testing with my K2/100 that raised the internal air
temperature well above 50C (120F) and left the heat sink too hot for me
to hold my hand on for any period of time with no ill effects. 

Ron AC7AC
K2 # 1289