Ralph McClintock wrote:
Hello all, I have discovered that the 20 and 17 meter ouput power of
my K2/100 is running around 65-70 watts maximum. The other bands all
put out the normal 100 watts. (85-90 watts on 10 meters.) When you
try to go up to the 70-100 watt level on 20 or 17 meters the K2
flashes a Hi-Currect warning.
First check the current draw with the K2 set to 10 watts. If it puts
out 10 watts with reasonable current (less than 3A), the problem is in
the amplifier. In that case, there may be a problem with C80/81 and/or
R190/20. Elecraft has supplied replacements for these components --
some resistors were overly inductive, and some capacitors low in value.
If you can't get 10 watts with reasonable current from the driver, then
check the tuning of the bandpass filters on 20/17 meters. My early K2
had to have some extra capacitance added to the trimmers to hit resonance.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
