Brent Sutphin WB4X wrote:
I recently built and installed a KPA100 on my K2. It works great but
today on twenty meters I got a high current message and the amp shut
down. I have the driver current set for 4 amps. Any suggestions?
First check the current at 10 watts (amp off). If it's reasonable, then
you have the 'hard to drive on 20-30 meters' problem. The last thing I
heard was that C81 and C82 in the KPA100 can be increased to 5600 pf to
help. However, I don't fully understand this, so I suggest you ask Gary
<[EMAIL PROTECTED]>.
If the current is high-ish at 10 watts, make sure the 20 meter bandpass
filter trimmers are not at maximum capacity. I had to parallel some
small capacitors with them to get the adjustment within range.
What's 'normal' current? I'm drawing about 3.2 amps on 20 meters now,
less on other bands. This of course is with the KPA100 running 100
watts, measured by tappinf DISPLAY.
--
73
Vic, K2VCO
Fresno, CA
http://www.qsl.net/k2vco
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