Tim,
I'm a QLF CW operator. Yes, that bad. :^)
What you described below is exactly what I go through during a contest.
Unless I switch back and forth between narrow and wide, I cannot listen
for very long on narrow.
For the wider Topband audience:
Set the BW to 3 kHz, this is how wide the
Hi Tim
You wrote < In VHF/UHF and EME weak-signal CW work, a lot of operators also
liked listening with wider RX filters too, often preferring Gaussian filter
shapes, and letting their ear pull the signal out of the noise.>
I may be just normal because my experience on EME CW is very different.
Jerry:
Clever way to evaluate FT8 SNR reports with your VFO 1 and 2 comparisons.
I often see positive numbers on FT8 160 meter signal reports for strong
stations on FT8. For example -- if a station is S9 + 10 dB audible, then it
reads a positive number
for the FT8 signal report.
At the risk
Correct me if im wrong:
A K3 owner could easily check this.
You need 2 computers, running WSJT on both. Don't know if you can run 2
instances of WSJT on a single computer. Feed the left channel from LINE
OUT (=mainRX) to one instance of FT-8 and the right channel (=sub-RX) to
the other
Hi,Narroving filter in WSJT-X digi modes will degrade decodes! Best performance
you'll get using wide open filters on you radio.I sugest you to look at the
WSJT-X archives and find the answer to your question by the author it self -
K1JT.As we are radio Amateurs i beleive its worth to
Speaking to the narrowness of filters for
CW; I recently had an issue with my K3s
which has the dual Rx and a full
compliment of filters with 200Hz the most
narrow in the main & Sub Rx receivers. I
sent it for repair and used my backup K3
which has been upgraded to essentially a
K3s with
On 2018-12-20 11:45 AM, K4SAV wrote:
> In the case of a crowded band it becomes obvious that CW is much
> superior to decoding a weak signal because all those strong signals
> limit the ability of FT8 to decode a weak signal.
That is only true if you leave AGC enabled and the strong signals
I broadly enjoy the digital modes, especially RTTY, and have been using
some FT8 outside of contests.
A signal power that FT8 reports as being at -15dB, is easily heard and
copied by ear by any decent CW operator. I think a really good CW operator
could pull (maybe with a few repeats) callsigns
Thanks to the folks commenting on how FT8 works.
VE3KI said:
"The noise floor the wsjt-x signal is referenced to is the noise within
the bandpass during the two-second period when no-one is transmitting,
not the signal level when people are transmitting."
That was what I originally thought
HI,
Thanks for sharing experience!
Question to FT8 and "noise" relations - In usual case everything in
passband is noise except signal of interest.
So with only one FT8 signal and white noise in passband S/N can be
increased narrowing passband till it matches signal width. EME guys know
that
Noise is signal spread over a large bandwidth, We tune our receivers to a
frequency to copy signals in a relatively narrow bandwidth. Nevertheless, there
is some of that noise in that same bandwidth. How does placing a resistor or
choke to ground reduce the noise while not reducing the
Hi Jamie,
I assume you are referring to short RX verticals similar to those used
in the Hi-Z and other arrays with a 20 to 25 ft vertical element.
I have extensive experience with these and have the HiZ-8 on 160, the
passive BSEF-8 array with 25 ft "umbrella" verticals on both 160 and 80
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