If having a "mild Q" available will allow it to be used full-time without
ringing, and reduce background noise, I would love to have that feature!
73,
Dick- K9OM
I just want a mild Q setting to imitate the shape I had with the MP all
those years. Those who hear it will get it, just li
On 10/31/2010 11:44 AM, Kok Chen wrote:
> The same SNR argument applies to how noisy his local RF environment is
> compared to your environment
This is often the dominant factor. When I lived in a Chicago
residential neighborhood, my S-meter rarely got below S7 on band noise
with narrow CW filt
On 10/30/2010 6:54 PM, Barry N1EU wrote:
> Main RX Width, Shift
> Sub RX Width, Shift, Ant
I can see some usefulness for this, although I'm pretty happy with what
I have for the MAIN RX. What I'm not at all satisfied with is display
for the SUB RX (nor with some of the operational functions rela
It makes sense to me Joe, (sorry Guy)
If you want a "milder shape" you don't really need APF.
Milder shape is the opposite of "peaking"
Bob
K6UJ
On Oct 31, 2010, at 4:33 PM, Guy Olinger K2AV wrote:
> You've brought that up several times, Joe, but that is not the sound,
> and how do you use
On Oct 31, 2010, at 7:54 PM, Paul Christensen wrote:
> Perhaps a quasi anti-LMS algorithm could be used to establish Auto APF.
> Does such an algorithm now exi[s]t by name?
(For those who are not familiar with "LMS," it was an algorithm created by Ted
Hoff for his dissertation, under the super
On 10/30/2010 2:13 PM, Ron W3ZV wrote:
> That leaves a couple of
> coax connectors, a balun and the ladder line feed. Sounds like the next
> step is a quick and dirty antenna to the RX antenna input.
Step #1 -- VERY IMPORTANT. Look at every coax adapter anywhere in your
station. If it does not s
Paul,
>> It seems that APF is really the inverse of the notch function.
>> Perhaps a quasi anti-LMS algorithm could be used to establish Auto
>> APF.
That's exactly the CW noise reduction algorithm. I've seen Lyle write
many times that the NR builds a low order filter around any coherent
signal
On the K3, that is the denoiser function.
73,
Lyle KK7P
> ...Consider an automatic DSP notch filter that uses the LMS
> algorithm. It seems that APF is really the inverse of the notch function.
> Perhaps a quasi anti-LMS algorithm could be used to establish Auto APF.
> Does such an algorithm no
Our thanks to the many Elecrafters who sought out the Mid-MO ARC
Halloween Special Event from Frankenstein, Missouri, this weekend. The
weather was gorgeous, the fields were harvested, the colors were
beautiful., and the witches were flying.
I can emphatically say that without the new Audio Pe
George,
The first thing to check is the setting of CAL tPA. If that does not
cure your problems, ask here again.
73,
Don W3FPR
On 10/31/2010 11:05 PM, George Winship, NC5G wrote:
> My shack is in a separate building from the house and is not heated or cooled
> unless I am in there. Twice, si
Good Evening,
I received the firmware for APF on Friday night, installed it on
Saturday, and tested it both then and today during both nets. Wow! It
works very nicely. Nothing like learning how to use something while under
fire ;) It was easy to tell there was someone outside the swee
My shack is in a separate building from the house and is not heated or cooled
unless I am in there. Twice, since the weather has finally cooled here in
Texas, I have had the following problem with my KPA 100. When I turn on the
K2/100, the cooling fan immediately goes to high speed. When keying th
> "In the RTTY world, "twin peak filters" available in many rigs often give
> better results only because many software demodulators do not come with
> matched filters. "
Chen,
So far, nobody has discussed the possibility of an "Auto APF" feature that
functions much like Auto Notch, but would
On Oct 31, 2010, at 6:13 PM, Jeff Cochrane - VK4BOF wrote:
> I know nothing of CW and it's esoterics but it seems to me that maybe this
> APF thingy maybe of some use to digital signals too, as in peaking up a
> (very) weak PSK31 signal or something of that nature.
> Would that be the case?
IM
Thanks for the information Lyle, I appreciate it.
Like I said, I have no clue with CW and without a rhythmic bone in my body I
will probably never get this CW thing..nor any of it's finer points.
(Thank god they finally implemented codeless licences over here!) :-)
I didn't realise that th
Good point, Paul, but my experience with this sort of filter says that
variable Q also affects the peaking amplitude.
That is, the higher Q is obtained with more feedback which results in more
gain.
Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-bo
The APF has a rapid 180 degree phase shift as you pass through its
center frequency. This is fine fore CW, but would wreak havoc on a
PSK31 signal. The K3s narrow filters (nomianl 50 Hz) are very good for
local PSK31 decoding. In addition, most PC-based software includes
well-matched filters
Pardon my ignorance,
I know nothing of CW and it's esoterics but it seems to me that maybe this APF
thingy maybe of some use to digital signals too, as in peaking up a (very) weak
PSK31 signal or something of that nature.
Would that be the case?
What are the pro's and cons of implementing it for
As one who has had his ears pounded for hundred (thousands?) of hours by DX
contest stations whilst trying to listen to a deep weak layer among the
cacophony of strong stations, I am very excited by what I'm hearing
regarding the field test of APF.
While tinkering with the details, Elecraft, ple
Too bad I didn't get it installed in time for the QRP Zombie Shuffle --
lots of signals needing help there.
It's not easy to find just the right signal that might benefit when you
want to test one, but I've found several in the past couple days. I
think the APF is going to be a useful addition
I suspect the moment variable Q were to become available, soon thereafter,
the next request would be for variable peaking amplitude. At some point,
Elecraft must decide what they want from APF -- is it an emulation of a
filter used in a transceiver from twenty years ago? Or, is it something
mo
You've brought that up several times, Joe, but that is not the sound,
and how do you use it in CW with Shift increment at .01, particularly
with DUAL PB turning APF on and off? 73, Guy.
On Sun, Oct 31, 2010 at 4:47 PM, Joe Subich, W4TV wrote:
>
>>> What I have been trying to point out is that th
Setting up most any digital interface for use with the K2 is a similar
task - that is if you break it down into 3 pieces of communication with
the K2. The remainder is specific to getting the jumpers set correctly
in the interface box to direct the signals to the proper wires in the K2
to in
Joe
What you describe is not 'variable'.
N4LQ
Steve
- Original Message -
From: "Joe Subich, W4TV"
To: "Guy Olinger K2AV"
Cc:
Sent: Sunday, October 31, 2010 4:47 PM
Subject: Re: [Elecraft] K3 APF Adjustable Q
>
>>> What I have been trying to point out is that there is a general
>>> be
Barry,
For right now, you will only find it mentioned on this reflector. It is
a very recent implementation and at this point there are a few details
that are being worked out. You should consider it as being in "alpha
test" at the moment. In addition to the regular Firmware Field Test
te
>> What I have been trying to point out is that there is a general
>> benefit for a milder shape, that one MAY leave on all the time,
>> and tweak to tight as needed.
If you want a "milder" shape, use Dual PB filter with a 400 - 500 Hz
background and 100 Hz foreground. That can certainly be left
APF will be in a beta release very early next week. I'm sending the
field-test firmware out on request until then. So far we have about
two hundred thumb's-ups.
73,
Wayne
N6KR
On Oct 31, 2010, at 12:12 PM, Guy Olinger K2AV wrote:
> Still field test. Wayne wanted the basic APF function teste
So yes, there are a BUNCH of variables that determine whether the DX station
is going to hear your signal.
My approach -- though this has been confined to 6 meters up until recently,
when I got back on HF CW and digital modes with a VERY small footprint --
has always been to do whatever I can
Still field test. Wayne wanted the basic APF function tested, but was
not done in menu's or something before beta released. Soon I imagine,
for the CW contest season. 73, Guy.
On Sun, Oct 31, 2010 at 3:03 PM, wrote:
>
> Hi all,
>
> Interesting to read all the comments about the new APF featu
Hi all,
Interesting to read all the comments about the new APF feature. Did I miss
something about how to download the "early" version? Seems like a lot of
traffic on the reflector indicating a lot of guys have it. I still don't see it
available on the Beta download FTP site.
73,
Art KZ5D
Hello,
I have worked CQWW SSB this weekend and noted that kat3 don't tune
correctly.
Many times after tuning SWR is 1.2 or 1.3 even there is no more swr on
antenna.
I have dipole on 160 meter and swr is under 3 to1 on band, but kat3 try and
try long time and leave it 1.8 if at all.
My K2 with
On Oct 31, 2010, at 10/3110:05 AM, Byron Servies wrote:
> Naieve newbie question, because im missing something here: if the
> signal you want is that hard to receive, what are the chances the
> other station will be able to hear your reply?
Since I use simple antennas, and even though I a
Hello again Don,
After completing your suggested settings on my K3, I was able to work 3 new
countries during the contest with NO RFI issues when using my linear! I've
also made some minor changes to the TX EQ settings with the assistance of a
local ham, K6RBS, to bring up the "highs" a bit. Th
There is too much contest activity to make the net work. Let's skip the net
this week and come back next week.
73,
Phil, NS7P
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net]on Behalf Of Phillip Shepard
Sent: Saturday, October 30, 2010
* On 2010 31 Oct 11:18 -0500, paolo gramigna wrote:
> Hi all,
>
> I have been using MixW with my K3 for a long while, and I wonder if some of
> the new breed programs are worth the try.
>
> My K3 is connected to MixW via a RigExpert plus interface. I work mainly CW,
> and I like to point-and-clic
Thanks, Gary. Finding Wayne's 24-October "APF Progress report" made ALL the
difference. From the other traffic I thought I had missed some new "general
release" feature.
73, Barry K6RM
From: Gary Hvizdak
To: barrypf...@sbcglobal.net
Sent: Sun, October 31, 2
Even domestic run-of-the mill contacts with people using a limited antenna
such as a short whip sitting on the patio or a random wire in the attic in
an antenna-restricted neighborhood often produce a much weaker than expected
signal.
Personally, I try to work the weakest signals I can read well.
On Sun, 31 Oct 2010 17:17:14 +0100, you wrote:
I've used HRD for several years and it has done everything I wanted it
to do, but it has become too large over the years.
Radio Amateur N5GE
>Hi all,
>
>I have been using MixW with my K3 for a long while, and I wonder if some of
>the new breed progr
If he's running 5 watts to a coat hanger antenna on a remote island, and you're
using a 1500-watt amplifier and 3-element beam to go with your beautiful K3,
the chances are quite good:-)
Besides...the APF feature will help us all be able to copy the "/QRP" at the
end of his call.
Bud, W2RU
Pretty good, if the other station is QRP and you are not, if the other station
is DX and
you are a high-power DXer, or if the other station has a K3 too!
On 10/31/2010 10:05 AM, Byron Servies wrote:
> On Saturday, October 30, 2010, Robert Harmon wrote:
>
>> It is a tool to be used in the real t
Folks,
Does anyone have experience installing a Rigblaster Plus II for use with a K2?
I would like to get into digital modes (my CW is way too poor). I am using a
fairly new computer running Win XP.
73 es THX
KE7UAE
__
Elecraft
I only pay attention to the Elecraft reflector intermittently but have noticed
lots of postings about APF lately. Is this described anywhere on the Elecraft
web site? I put APF in their search box and nothing comes back.
Thanks es 73, Barry K6RM
On Saturday, October 30, 2010, Robert Harmon wrote:
> It is a tool to be used in the real tough cases where the signal is right
> down in the noise and you need that extra help to pull him out.
Naieve newbie question, because im missing something here: if the
signal you want is that hard to rec
By "oscillate" I was thinking of my HQ-150's Q multiplier. It does remind me
of APF but of course is a totally different thing.
As APF now exist in the K3, I choose to use it only when necessary. If it
had variable Q, it would be on constantly and I would adjust Q as needed.
One advantage to an e
I agree that we should not give up the tunable APF. For one thing, RIT is not
available if
QRQ CW is on. I like the option to set the DSP bandwidth to say, 1 kHz, and
then use the
APF tune to pick out the guy I want to copy. This might be useful when running
in a
contest: set the DSP to kill
Hi all,
I have been using MixW with my K3 for a long while, and I wonder if some of
the new breed programs are worth the try.
My K3 is connected to MixW via a RigExpert plus interface. I work mainly CW,
and I like to point-and-click on the waterfall, look at the decoder if I
miss something, and l
There are also other considerations. In QRQ mode, RIT is N/A. So
other than tuning VFO A to follow the peak, use SHIFT to do it. Also,
SHIFT uses a 10 Hz resolution independent from the VFO tuning rate.
This doesn't leave many of the overloaded controls on the UI for a
PEAK control.
Having a ch
I'd say for variable Q, the tightest setting should be just what is
there now. So no one is losing anything.
What I have been trying to point out is that there is a general
benefit for a milder shape, that one MAY leave on all the time, and
tweak to tight as needed. MP's EDSP, 450 Hz sidetone, N
We already have the peak sweep with the SHIFT control. It would be great to
have variable Q with the WIDTH control. Varying the amount of Q is desirable
so the peak can be adjusted to reduce any ringing that might be present. Roy
Morris W4WFB
If the caller is off frequency I would just use RIT to center him in my
passband as usual and let APF do it's thing.
Having used outboard APFs for years, the ability to adjust it's selectivity
is very important. If the band is quiet and the signal is very weak, I would
adjust the APF nearly to t
>> however the fixed Q has a bit of ring and at times I would like to
>> back it off (widen) it just a tad.
This is the same mistake Yaesu made in the FT-1000D; de-Qing the
original APF made it useless in later radios. This is the very
reason not to add adjustable Q or reduce the Q of the APF c
I've experienced the two-button press issue before on multiple KX1s, but in
every instance I just wasn't paying attention. You've got to press both
buttons simultaneously, or as close to simultaneous as you can get. Never
seen the tuning problem, I'll have to leave that one for greater minds.
73
Hello Group,
This 8 watt 50Mhz transverter was built some time ago to be used with K2.
However, I only used it for a few times and eventually went for XV50 and now K3.
It is now surplus to my requirement. It is still in excellent working and
cosmetic condition. Comes with original manual. M
If I had a choice between variable center frequency and adjustable Q, I
would choose adjustable Q.
My logic is: The center frequency automatically follows the sidetone
frequency so I have no need to adjust it however the fixed Q has a bit of
ring and at times I would like to back it off (widen)
Group,
My Sub receiver seems to have died. All firmware is up to date. I
have check the configuration and KRX3 is installed, the Sub RCVR is on ANT #1
along with the Main RCVR. What am I missing here? The Sub RCVR has always
worked beautifully. The P3 is connected.
Ignacy wrote:
>
> When I tune up, say from 14005, Kx1 reaches a limit, say at 14027, and
> refuses to tune higher. After powering down and up everything is fine, at
> least for some time. Any idea why?
> Ignacy, NO9E
>
Mine (and I'm sure all of them) will do the same thing. I'm still having a
I should have also had Subrx Pre, ATT, NB, NR in that list of parameters to
display:
Parameters:
Main RX Width, Shift
Sub RX Width, Shift, Ant, Pre, ATT, NB, NR
TX Mic Gain, CMP, PWR, Mon
73, Barry N1EU
Barry N1EU wrote:
>
> Yes, but I don't believe there ARE any applications that display th
Yaesu DMU unit can display everything, adjust settings, etc, etc etc.
Ken..G0ORH
CW4EVER
Sent from my iPhone
On 31 Oct 2010, at 01:30, Don Wilhelm wrote:
> Barry,
>
> I don't believe there is anything out there that only displays the
> parameters. Most applications that display t
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