Thank you for comments.
I suspected that voltage drop could be a problem. My power supply has a nominal
13.8 Volt output, and the voltage as indicated by the KXPA100 Utility drops to
around 13 volts (+ or - 0.1 Volts) during full power. However, there appears to
be no correlation between the
25, 2014 6:37 AM
Subject: Re: [Elecraft] Experience with KXPA100
Er... um... is such a large voltage drop typical? We don't see that
happening on Brand X amps using good power supplies. I understand the
voltage drop when going from, say, 10 to 100 watts should be minimal, like
no more than
Sent: Wednesday, June 25, 2014 6:37 AM
Subject: Re: [Elecraft] Experience with KXPA100
Er... um... is such a large voltage drop typical? We don't see that
happening on Brand X amps using good power supplies. I understand the
voltage drop when going from, say, 10 to 100 watts should
Hello,
My KXPA100 ser.nr. 00822 has now been on the air for several months and
produced several hundred QSO's. The performance however, is mixed.
The output power varies from one band to another with the output set on the KX3
to 110 Watts and using the KXPA100 utility for meetering and a dummy
*/Hi Hans
My kapa100 kit serial #360 is doing the same as yours I was under the
impression that there was a refinement to the firmware that was going to
fix this issue.
Regards
Art
ka9zap
/*
On 6/24/2014 2:11 PM, Hans J Rasmusen OZ7BQ wrote:
Hello,
My KXPA100 ser.nr. 00822 has now been on
Hi Hans,
The first thing to check for is insufficient power-supply voltage as measured
by KXPA Utility on key-down at full power. This is the usual reason for lower
power output. If it's too low, you might try any of the following: shorten the
supply cable, double up the cable (there are two
UA9CDC
- Original Message -
From: Hans J Rasmusen OZ7BQ oz...@yahoo.dk
To: elecraft@mailman.qth.net
Sent: Wednesday, June 25, 2014 1:11 AM
Subject: [Elecraft] Experience with KXPA100
Hello,
My KXPA100 ser.nr. 00822 has now been on the air for several months and
produced several
Er... um... is such a large voltage drop typical? We don't see that
happening on Brand X amps using good power supplies. I understand the
voltage drop when going from, say, 10 to 100 watts should be minimal,
like no more than .2 volts. I have also seen this sort of power output
weakness
Really depends on the gauge and length of wire you're using. Find your wire
data, for instance at http://www.powerstream.com/Wire_Size.htm. You'll be
shocked at how much voltage you can drop at 100 watts using a few feet of
what you thought was heavy gauge wire. Example: 12 gauge wire is 1.6
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