This really looks like a data latency of a stale data issue, as I discussed in
an earlier posting and Don expanded on in his post. To me, this is a minor
curiosity, but I am sure that there will be a few who will say their radio is
worthless because of it. MarkKE6BB
Firstly thanks to everyone for your input on potential causes of SWR
reading instability with my KX3. Since there were so many possibilities
(antenna, heating, radio, etc.) I knew I needed to go back to basics and
initially test the radio with a dummy load on the bench. Well, I
managed to
I have noticed the same thing on my KX3 as well.
Can you redo the 1-2-1-2 test with FM?
You did the SSB test only with 1-2-1-2 but the FM test with XMIT full power
and no variation in power with speech.
--
VaibhaV
On Thu, Apr 10, 2014 at 11:06 AM, Gary Hawkins g...@hawkins-zhu.com wrote:
I never watch SWR in SSB, but CMP and ALC.
73, Phil W7OX
On 4/10/14, 11:51 AM, VaibhaV Sharma wrote:
I have noticed the same thing on my KX3 as well.
Can you redo the 1-2-1-2 test with FM?
You did the SSB test only with 1-2-1-2 but the FM test with XMIT full power
and no variation in power
Re: Can you redo the 1-2-1-2 test with FM?
I just duplicated the original test with my KX3 (FW 1.94/1.28) and got the same
results. I repeated the 1-2-1-2 voice test and the SWR remained stable as it
did in AM as well.
It looks almost like the KX3 is calculating the SWR using a good current
The second sentence, first paragraph should have read:
I repeated the 1-2-1-2 voice test ON FM and the SWR remained stable as it
did in AM as well.
Mark
KE6BB
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Thanks for repeating the tests.
I started paying close attention to the SWR meter after I got the Alex
Loop. The antenna has a very narrow window where the SWR is low (receive
noise high). I try not to use the ATU with the loop. Even touching the loop
capacitor dial changes its behavior and it is
I suspect that VSWR tests should be done with constant carrier CW, and not with
a fluctuating signal as SSB.
Sent from my iPhone
...nr4c. bill
On Apr 10, 2014, at 4:26 PM, Mark Petiford rv6am...@yahoo.com wrote:
Re: Can you redo the 1-2-1-2 test with FM?
I just duplicated the original
With magnetic loops becoming more popular, it probably bears commenting:
The AlexLoop [and clones] is a resonant transformer and *must* be at
resonance to work. This means No ATU's, ever. At resonance, the
coupling between primary and secondary is very high and mine works very
well. Off
Mark's analysis was 'right on'. Due to the varying nature of the SSB RF
waveform and the workings of digital sampling, it is impossible for the
forward power and reverse power to be sampled at exactly the same
instant (one of the limitations of digital sampling intervals).
So, if the reverse
My only question here is WHY?
I think Mark is on the right track. It could also be that between
syllables, and during quieter times in speech we're simply not seeing
enough RF to get off the bottom bits of the A/D converter.
Either way, looking at a wildly varying transmitter output and
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