Had a similar problem when working for Motorola. Couldn't get the SWR
down with the antenna connected. Even changed antennas. Dummy load OK.
Finally looked at the signal on a spectrum analyzer and 80% of the power
wasn't even close to the crystal frequency.
Did you try driving the amp with
Wow. That was a great job of problem solving. In my case, I get the KPA fault
with just 8 watts of drive from the K3S. So I doubt that’s my issue.
Carl Yaffey K8NU
Recording studio.
cyaffeyno_s...@gmail.com
614 268 6353, Columbus OH
http://www.carl-yaffey.com
http://www.grassahol.com
Last summer a friend of mine got a new K3s and had problems with it on
just six meters. As soon as he raised power above about 10 watts, the
SWR reading went crazy and the rig gave high VSWR warnings. He checked
his six meter yagi with another SWR analyzer and the antenna checked
good. After
Low pass filter in line?
On 12/4/2016 6:30 AM, Mike va3mw wrote:
As quoted
If the amp works on a dummy load, then look beyond the amp at this time until
you have eliminated everything else.
Somewhere else you are getting a voltage breakdown that is arcing and tripping
off the amp due to
As quoted
If the amp works on a dummy load, then look beyond the amp at this time until
you have eliminated everything else.
Somewhere else you are getting a voltage breakdown that is arcing and tripping
off the amp due to high swr. An MFJ analyzer will not show that.
Mike va3mw
> On Dec
On Sat,12/3/2016 9:41 PM, Vic Rosenthal wrote:
Look at any cables, switches and connectors that are common to the various
antennas.
Yes. Lots of "off-brand" coax is junk. So are most un-branded
connectors. If the PL29-style connector doesn't say Amphenol 83-1SP,
it's probably junk. How well
Look at any cables, switches and connectors that are common to the various
antennas. If it is OK with the dummy load, that points to it not being the KPA.
Vic 4X6GP
> On 3 Dec 2016, at 23:57, Carl Yaffey wrote:
>
> Bottom line: I can’t get more than 200 watts out of my new
Are you sure its only putting out 200 watts on 6 ??? MIne started acting that
way a few weeks after I assembled it , was perfect whenI first ran thru the
tests but later started doing exactly waht you describe . With an external
Array Solutions Powermaster wattmeter and good dummy load it was
-05:00) To: Elecraft List <elecraft@mailman.qth.net>
Subject: [Elecraft] Strange KPA500 problem on 6M
Bottom line: I can’t get more than 200 watts out of my new KPA500 on 6M. It
faults (HI SWR FAULT) when I try to increase the drive in order to get more
output.
But I get full power on 6 with a dumm
Bottom line: I can’t get more than 200 watts out of my new KPA500 on 6M. It
faults (HI SWR FAULT) when I try to increase the drive in order to get more
output.
But I get full power on 6 with a dummy load.
Bad antenna? Don’t think so. Here’s my setup:
3 element M2 6M beam fed with high cost, low
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