[Elecraft] K3 - SWR Fold-back

[AJSOENKE at aol.com]

In a message dated 12/11/2007 11:40:11 A.M.  Pacific Standard Time, 
k9ztv at socket.net writes:
You don't suppose trying to  use an 80-meter dipole on 160 had anything to do 
with it, do  you?

K9ZTV



AJSOENKE at aol.com wrote:

I don't know if  this will help, but I've had two experiences with my K3 
regarding power  reduction. While attempting to participate in the 160M 
contest, I 
connected  to my 80M dipole and hit tune in the ATU active mode. I 
immediately 
got a  high SWR and retune cycle which reduced the SWR at the rig to ~ 10:1.  
Checking the power output, which had been set at 106W, it was indicating  
79W.  
During a second subsequent tune (same ant and same settings ) the  rig 
initiated 
a tune cycle and immediately shut down. No overpower/high  current 
indication. 
I turned the rig on again, and everything was the same  as before.  I suspect 
maybe the tune was marginal and that at that SWR  the rig is between a 
'continue 
or shutdown' logic process. No residual  effects were noted.

Al WA6VNN K3 #31

Of course it had everything to do with it -  but an experiment is an  
experiment - I like to see what a well designed radio can really do. Besides I  made 
a few dozen contacts on the 160M contest and they were the first contacts  
I've made on 160 in 46 years of hamming.  I rather enjoyed it! I hope the  info 
was helpful in answering the question about SWR and rollback. Yes it does  roll 
back, and very gracefully I'd say.
 
Al WA6VNN



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