[Elecraft] Re: k3 SWR readings seem generous

Phil & Debbie Salas dpsalas at tx.rr.com
Sat Jan 3 08:34:13 EST 2009


"I always use 5W, ... when I tune up my external ATU."

Actually, I use 15 watts for tuning both the internal K3 tuner, as well as 
my external MFJ-998 tuner.  I do this for two reasons:

1)  I get much better SWR agreement between 15 watts and full power than I 
do with 5 watts and full power, especially on the external tuner.

2)  I figure that using a switching-type tuner stresses the 10-watt output 
circuitry of the K3 at 5-watts tune power (all that hot-switching).  But at 
15 watts, the K3 100 watt PA should have plenty of margin.

It might be interesting to know what power levels Elecraft recommends 
regarding radio stress during tuning.

Phil - AD5X 



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