[Elecraft] KPA100 -- Hi Curr @60W All Bands

Thu Jul 4 16:52:01 2002

Hi

It is critical to set R26 properly. Try turning R26 a little clockwise an=
d see if the power comes up. You may want to set R26 at 50 watts out to f=
ind the best setting. You must go out of tune and back into tune then mov=
e the power pot after making any adjustment of R26 so the adjustment is v=
alid. If your external wattmeter is not accurate (many are not) it is dif=
ficult to get the right setting on R26. Use a scope, if you have one with=
 at least twice the bandwidth of the measured frequency. You should read =
141 volts pk to pk at 50 watts across the 50 ohm load or 200 volts pk to =
pk at 100 watts Set the current limit in the cal current menu to 3 to 3.5=
 amps.

Don Brown
KD5NDB

----- Original Message -----
From: Michael E Dobson
Sent: Thursday, July 04, 2002 2:59 PM
To: [email protected]
Subject: [Elecraft] KPA100 -- Hi Curr @60W All Bands

I'm at the point in construction where you begin testing the transmit
output.  I cannot get more than about 60W on any band without getting a
Hi Curr warning.  I think I have the bias set correctly but it drifts up
for a bit so it may not be set correctly.  Any suggestions?

73,
Mike WA3KYY K2 #2221

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