Well, that was easy.
With the help of Don w3fpr, of course.
Turns out that the internal wattmeter in the KPA100 was giving bad
info to the
K2. It was reporting about half the actual wattage. A quick tweak of
R26 ( and R27 to match ) fixed it up.
- Jerry KF6VB
On
So - I figured - if something on the KPA100 is drawing excess current,
and not
really doing anything with it, it must be making heat, right?
I powered up the radio through the barrel connector, left the KPA100
connected,
set it to "tune" at minimum power and just left it for a while. Then
Jerry,
Are you measuring the power output with an external wattmeter? Or are
you depending on the power setting in the base K2. Use an external
wattmeter while troubleshooting this problem and a dummy load (not an
antenna) connected to the wattmeter.
The K2 power will fold back when the
On 2021-08-08 09:49, Don Wilhelm wrote:
Jerry,
Replace diodes D16 and D17 in the KPA100 wattmeter, and things should
settle down.
*** The diodes came in from Mouser yesterday, and I replaced them.
Things
are still not right. I did get a good adjustment on C1, and it now
reads 1 to 1
on
Carter,
Check/replug and check again the RJ45 plug on the back of the KXPA100.
It must be locked in place. You should hear a light click as it is
fully seated in its socket.
73,
Don W3FPR
On 8/12/2021 12:42 PM, Carter Craigie wrote:
My problems all started when I moved my Elecraft KX3,
Please keep us informed about what you learn. Ed Tanton N4XY Sent from my
T-Mobile 4G LTE Device
Original message From: Carter Craigie
Date: 8/12/21 12:50 PM (GMT-05:00) To: Elecraft List Members
Subject: [Elecraft] Help Needed for KPA100 Amplifier
My problems all started
Have you checked the voltage at the lower set of PowerPoles with the amp turned
on?
I've seen issues with bad PowerPole connectors in the past. Maybe something
happened to them in the move.
73
Lyn, W0LEN
-Original Message-
From: elecraft-boun...@mailman.qth.net
My problems all started when I moved my Elecraft KX3, PX3, and the ASTRON
RS-35A PS from the garage upstairs to the second floor. At first I noticed
that my Amp would put out only about 70-80 Watts. Then the output went
lower and lower until the Amp would not turn on. See below.
Here follows
"I just bought one of these Chinese knock-offs on eBay. I haven't opened it
- it arrived today. Is someone willing to try it out and measure the phase
noise in their otherwise properly working K3s?"
I don't know if you are familiar with Mark, W7MLG's, measurements on the
Kenwood TS-590 TCXO.
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