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 the
Andy,
That appears to be a TS-590/HDSDR problem and not a KPA500 problem.
You can likely get more support from th TS-590 and HDSDR forums than
from us on the Elecraft reflector.
73,
Don W3FPR
On 7/2/2019 10:19 PM, Andy Durbin wrote:
"In my case HDSDR sound output had spontaneously changed to
Does this happen without the amp?
Sent from my iPhone
...nr4c. bill
> On Jul 2, 2019, at 8:13 PM, Fred wrote:
>
> I’m going to try and answer all the questions that have shown up in this
> thread. I really appreciate all the ideas and things to check. I do have
> a day job (7 years to go)
"In my case HDSDR sound output had spontaneously changed to TS-590 TX CODEC
creating a feedback loop through
the PC. Break the loop and all is normal.
– Question, how do you break the loop?"
In my case I simply changed HDSDR sound output back to the Virtual Audio Cable
it was intended to be
I’m going to try and answer all the questions that have shown up in this
thread. I really appreciate all the ideas and things to check. I do have
a day job (7 years to go) so I only have time to play with this at night
and try and debug.
I drive my KPA 500 with somewhere between 20 and 25 watt
Does it happen at 200 W? Sometimes RF in the shack shows up only at higher
power levels.
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On Jul 1, 2019, at 9:39 PM, Mark Goldberg wrote:
>
> I'm going to take these two postings and suggest the possibility of RF
I'm going to take these two postings and suggest the possibility of RF
getting into the USB link to the PC causing it to drop samples.
Check the grounds and make sure there is a good ground connection between
the PC, Signalink and the radio equipment. Try ferrite beads (Mix 31) on
the USB line or
A clue. at 500 watts with the KPA500 there is an issue. At 50 watts
using just the K3 there is no reported issue. What's the difference?
RF field strength. Sounds like it might be and RFI issue.
Check all PL-259's and make sure they are VERY TIGHT. Check jumper
cables, between each
"That leads me to believe that the K3 output is rapidly changing on and off"
I have not looked at the video but this sounds very similar to a problem I have
seen. In my case HDSDR sound output had spontaneously changed to TS-590 TX
CODEC creating a feedback loop through the PC. Break the loop
Good to send the video
It sounds like the Sound card is dropping audio frames then and can he test
with WSJTx in their TUNE mode. Does the same thing happen.
If it was me, I would review the sound card settings for the sound card
device. Make sure it IS the one you think it is.
Could the compu
Fred sent me the video, which is actually very revealing. First the change rate
is very rapid, higher than I initially expected. The asterisk is on constantly,
and the power off time is not long enough for power to drop to zero. But what I
found very interesting is that the output power indicati
Sounds like the power from the K3 is too high. Should be about 25 or
so watts. Actually, 20 watts drives my KPA500 to 500 watts output on
all bands. I trust the SWR as seen by the amplifier is 1.5:1 or less.
Do you get any FAULT LED indications on the KPA500? You can use the
KPA500 Utility
Can you watch the SWR when this happens? If the antenna is hard to tune,
the tuner may find a match, but it may actually be fairly lossy, with power
being dissipated in the tuner. As the tuner inductors heat up, they change
value, and the SWR goes up, triggering a retune. You should be able to see
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 wrote:
>
> F
Fred,
Is the KAT500 trying to do a TUNE? It sounds like it may be.
If left in AUTO mode, the KAT500 can occasionally detect a false SWR
result. When that happens, the KAT500 will break the keying line to the
KPA500 while it tunes.
With the KAT500 in AUTO - train the tuner for all band segme
How are you setting power out? The K3 power out should be set to about
25W to get full power. What SWR do the KPA500 indicate and KAT500
indicate?
73, Jim K9YC
On 7/1/2019 6:05 PM, Fred wrote:
Hi,
I have a K3, P3, KPA500, KAT500 and a SignaLink for sound. Sometimes when
I transmit on FT8
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
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 5
18 matches
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