[Elecraft] Power variation

[Dr. William J. Schmidt, II]

Well I have something odd going on. I was trying some new antenna tunings
today and noticed that the power out on the KPA500 would start at about 100
watts.ramp up to 500+ watts over about 10 seconds, and then drop back to 100
watts again.  It kept repeating this cycle as I was talking to someone on
SSB.  The SWR was perfect to the antenna the whole time (external
measurement).  It almost looked like the ALC was oscillating at a very slow
rate (10 seconds or more).  I have not dug into this yet but wonder if
anyone else has seen this?  Checked all the coax connectors already.

 

 

Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ

Owner - Operator

Big Signal Ranch

Staunton, Illinois

email:   <mailto:bill at wjschmidt.com> bill at wjschmidt.com