That was me!
-Robby
VY2SS
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Hey Ralph Robby,
After all the contest activity on 160 yesterday, after I shut down I had
trouble getting to sleep because I was hearing all those phantom CW calls for
several hours before it subsided.
Seriously I was able to hear stations right on the noise that I would never
have been
Heck, I can hear thiose phantoms with the radio off (tinnitus).
Fortunately it subsides in the presence of other noise - just like with
the APF, which works FB for me on the low bands.
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse
Exactly my thoughts. I found the initial beta release with APF to be excellent.
After further improvements, more miss than hit, despite trying all the
tricks. Just my two cents worth...
Now back to the extensive QRP/QRO thread, and it's tenuous connection to the
KPA500...
Paul WB2ABD
K3 #129
...perhaps less gain and a little wider BW
or give the user the tools to do it ourselves.
I was thinking exactly that myself last night on 160m - no problem with the
bandwidth, but I'd gladly give up a db or two of APF gain to reduce the
ringing.
Because of the ringing, I can hear signals that
What you're describing (hear signals that aren't even there) sounds to me
like the APF is working just as intended. You're hearing faint ringing at
your sidetone frequency when no signal is present. When a signal is present
and tuned in, it will have precisely that same tone but will pop
Ralph,
You have heard that to reduce the ringing, increase the DSP bandwidth.
The 50 Hz filter width has a bit of ringing by itself, so add the APF
and the situation becomes more pronounced.
You can't have your cake and eat it too. The bit of ringing will bring
out weak signals just like
: Elecraft Reflector
Subject: Re: [Elecraft] K3 APF Effectiveness
5-Hz steps simply make it easier to tune the APF. This has absolutely no
effect on the filter passband, Q, etc. Going back to 10-Hz steps would just
make it harder to center signals when using SHIFT, as was the case with
4.17. Many
Hi All:
I have the same experience as Igor. There is an APF sweet spot that either
moved or
disappeared.
Would it be helpful if there was a GUI that let us save, load, share, and see
all of
the various K3 parameter settings that we are adjusting?
On Nov 17, 2010, at 11:53 PM, Igor Kosvin
John,
For me also.
K3 EZ gives you a lot of the parms. http://home.roadrunner.com/~n2bc/SW.htm
73, Mike NF4L
On 11/20/2010 3:16 PM, John Seney wrote:
Hi All:
I have the same experience as Igor. There is an APF sweet spot that either
moved or
disappeared.
Would it be helpful if there was
Message -
From: John Seney john.se...@gmail.com
To: Igor Kosvin k.i...@comcast.net
Cc: 'Elecraft Reflector' elecraft@mailman.qth.net
Sent: Saturday, November 20, 2010 2:16 PM
Subject: Re: [Elecraft] K3 APF Effectiveness
Hi All:
I have the same experience as Igor. There is an APF sweet spot
Just do two clicks at a time and you have 10 Hz steps, no? What am I missing?
David K0LUM
At 8:54 PM -0600 11/20/10, Dave Perry N4QS wrote:
I agree that the signal doesn't pop out anymore with 4.22, but I think it is
due to the change to 5 Hz tuning. It is harder to hear the peak in the
signal
] K3 APF Effectiveness
Hi All:
I have the same experience as Igor. There is an APF sweet spot that either
moved or
disappeared.
Would it be helpful if there was a GUI that let us save, load, share, and
see all of
the various K3 parameter settings that we are adjusting?
On Nov 17
Gentlemen,
I am not a CW operator (yet) as I have let my 1960's Navy training go to
pot, but might I suggest that something might be overlooked in this
situation with the APF seeming less effective?? The common thing mentioned
is that changes on one area often effect other areas in the
There are many variables at work with regard to judging the effectiveness of
the K3 APF. In addition to the discussions of noise and careful tuning, there
are user preferences to consider:
1) Headphones vs speakers
2) Enhancing a weak signal to pop up that would otherwise be copyable with
,
Igor, N1YX
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of wb6r...@mac.com
Sent: Wednesday, November 17, 2010 3:10 PM
To: Elecraft Reflector
Subject: [Elecraft] K3 APF Effectiveness
There are many variables at work
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