I haven't been following this thread closely, but it sounds like what
has been going on with my K3X with KXPA100 and internal ATU on FT8.
Transmitting with 100w, the relays click rapidly while the power meter
on the KXPA100 jumps up and down. Seems to be trying to find a match
that's not there. I've been trying different settings and the problem
goes away when I increase the "power" (audio output) slider on WSJT-X.
Increasing MIC GAIN and reducing the WSJT-X "power" slider seems to fix
it too. Does this make sense to anybody?
73, David, KC1DNY
On 7/1/2019 9:26 PM, Fred wrote:
Hi Ken,
It only happens when running digital mode FT8. And it doesn’t happen all the
time when running digital mode. Ken I’ll send the video I made. I just looked
at it and it has an *.
Thanks,
Fred
248-613-4086
Sent from my iPhone
On Jul 1, 2019, at 9:22 PM, Ken Winterling <[email protected]> wrote:
Fred,
Does this condition also happen on SSB, RTTY, CW or only while running digital
mode?
Is it possible the PTT/key line is being dropped? When the power drops is
there an asterisk (*) on the left side of the KPA500 display? An asterisk will
appear on the left side of the LCD display if there is a valid PA KEY/PTT
signal is being received from the transceiver. If there is no asterisk the amp
isn't receiving a valid PA KEY/PTT signal from the transceiver. If there is an
underscore instead of an asterisk it means that the amplifier keying is being
inhibited by a low signal on pin 11 of the AUX connector.
Ken
WA2LBI
On Mon, Jul 1, 2019 at 9:06 PM Fred <[email protected]> wrote:
Hi,
I have a K3, P3, KPA500, KAT500 and a SignaLink for sound. Sometimes when
I transmit on FT8 running full power on the KPA500, the KPA500 will click
on/off. The power doesn't turn on/off, it seems like a relay inside. The
power meter will go to about 500 watts, then down to 0, then to abut 500
watts...and down to 0 maybe once a second. I have a short video I can send
if someone would like to see it. When I bypass the KPA500 and use 50 watts
or so just on the K3, no issues.
Please let me know if you have any questions.
73, Fred
KD8ZYD
--
Thanks,
Fred
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