[Elecraft] Max Watts KPA100 RTTY

[Bill Coleman]

On Apr 23, 2006, at 11:32 AM, Steven Pituch wrote:

> What is the maximum safe operating power out for AFSK RTTY using  
> the KPA100
> in the EC2 case? The manual says 40 Watts for BPSK, and 25 Watts MFSK.

My KPA100 is in the K2 case, but I'll relate my experience.

I've run my K2/100 very hard in contests, SSB, CW and RTTY. I can run  
100 watts SSB or CW, no problem. CW ends up being a lot hotter than SSB.

If I run 40 watt RTTY, the heat sink will get even hotter than the  
hottest on CW. I would recommend 25-30 watts only.

If you add a supplemental cooling fan to the heat sink, you can run  
50 watts or so.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901