Re: [Elecraft] KX3 Field Ant. for 80/40/30

[Erik Basilier]

Don, please see my comments below:

>About all you can conclude from the WSPR readings is the relative difference 
>between antennas.  If you want to compare two horizontal antennas, place them 
>end to end.  >The radiation at the end is at a minimum and the antenna will 
>not interact.

Years ago I was under the naïve impression that if you buy a perfectly 
symmetrical GP, put it in a vertical position high up in the air, with no 
nearby metal objects, and run the coax perfectly vertically to a transmitter 
where the feeder hits the ground, you will get a nice pattern that is well 
predicted by a model. After all, the antenna manufacturer probably showed us 
that pattern in their catalog, and we have seen that pattern before in our 
antenna book. Well, not too long ago QST published an article that said 
(paraphrasing): "Not so fast. Sometimes you will get a very different pattern, 
and it may be terrible at the low elevation angles that you want." The reason: 
the feedline has current on the outside. How much will depend on its length. 
Putting a common mode choke at the feedpoint won't save you if the feedline is 
long; you may have to break up the current by several chokes along the line." 
The author supported this by theory as well as measurement. And why not? The 
feedline is a nearby metallic object, so why should it not affect the 
performance of the antenna? With that in mind, I have been expecting 
interaction also between two horizontal dipoles installed in line. I just went 
to EZNEC to check it. For the GP with a vertical, non-connected halfwave wire 
hanging under it, the center current in that wire came to about 1/4 of the GP 
drive current. The pattern was changed but not too badly. Then I modelled a 
horizontal dipole with another one mounted close off the end, in line. The 
center current in the non-driven dipole came to about 38% of the drive current 
in the driven dipole. The azimuth pattern was now a 4-clover similar to that of 
a full-wave dipole. In comparison tests where patterns are important, that is a 
lot of interaction between the two dipoles arranged end-to-end. I also modelled 
two horizontal dipoles mounted at right angles (one driven dipole end close to 
one end of non-driven dipole). Now the current in the undriven dipole got as 
high as about 58%. The azimuth pattern was now bidirectional with no difference 
front to back, but with a wider lobe on one of the sides. It seems that 
interaction is very significant regardless of orientation as long as the wires 
are close.

>As for comparing a vertical with a horizontal antenna, or two verticals, the 
>only thing one can say is at that particular time and distance for 
>propagation, one antenna is better >than the other.  That may not be true for 
>other propagation conditions, so be careful when generalizing.
>As far as two horizonal antennas oriented in different directions, you would 
>expect greater signal strength in directions broadside to the antenna.  That 
>directivity may be >useful in actual use, but is not a valid comparison 
>between the two antennas.

Granted, but since I drank the WSPRLite antenna comparison coolaid, I view the 
ralated capability through a certain mental filter, which says, on the one 
hand, that it is a significant advancement in the art to using WSPR for antenna 
testing (the two WSPR transmitters combined with some special software 
proprietary to SOTABeams is more than just a combination of the transmitters), 
and on the other hand that the technique is based on certain assumptions that 
need to be examined if one tries to determine the limits of what is doable and 
what is not. 

For those readers that have not looked closely at what this new approach 
involves, even if they are familiar with WSPR by iteslf, I will summarize my 
understanding here. If you run a WSPR transmitter (or two) you can go to the 
free website and get a list of stations that heard you and see the s/n ratio 
for each. You quickly get overwhelmed by all the data, The distance to the 
receiving stations that heard you is probably a positive to you, and so is the 
number of stations that heard you. Maybe you like a contest that gives you more 
points for greater distane, so you like to see dx stations in the list of 
stations that heard you. Maybe you do Field Day, and you get the same points 
regardless of distance. In either case, trying to evaluate the data presented 
to you as an antenna comparison is time-consuming and confusing. Enter 
SOTABeams. They set out to create software that takes data off the WSPR 
website, for each of the repeating WSPR transmissions, and combines it into one 
performance number for each transmission, for each of the two transmitters. The 
algorithm is proprietaty, so you don't know if a high number is high mostly 
because of good distances or because of many stations hearing you. I think we 
can assume that both distance and number of receiving stations play a role. The 
numbers we g

Re: [Elecraft] [K3] DUAL PB and Diversity

[Gary Smith]

Al,

Nice read. I agree wholeheartedly with 
you. I had never used the APF/DUAL PB 
until Wayne, I believe it was, mentioned 
it some time back. I'd tried it in the 
beginning but wasn't skilled using the 
radio then and it was left by the wayside. 

I had used Diversity often and with great 
success, it always was a plus for me and 
any insertion loss was certainly either 
made up for by adding the preamp or at the 
least by the increased quality of the 
signal received. In my case I have the 
200Hz filters in the main & Sub Rx board 
and often run the width down as tightly as 
possible and if I must, adjust the RF gain 
to compensate for band conditions and I 
don't find any ringing.  If the RF 
adjustment is causing a loss with band 
conditions, I open up the width a little 
and still use the RF, but not as 
aggressively.

With that, I miss nothing in there and 
have as tight a width as possible with 
excellent tone from my received signals. 
Add to that the magnificence of the SubRx 
and It's genius. I would never be without 
the Sub Receiver, it's to me, absolutely 
essential for me to copy as best is 
possible.

Happy Thanksgiving to all who celebrate 
it.  

73,

Gary
KA1J

> As has been the case for the past several years the only K3 control I
> touched during the CW SS was the tuning knob because there was never
> any reason to futz with anything else. Whatever settings I had simply
> worked for every condition during the weekend, and besides, I always
> seemed to be focused on signals and never on the rig itself, thanks to
> this ability of the K3 to vanish while you're using it. This year I
> operated with DUAL PB for the entire contest. With the context
> bandwidth set to 500 Hz it sounded tight and open at the same time...
> really interesting... and I found it to be free of ringing. The K3 is
> so highly configurable and DUAL PB is just one more way to make it
> sound consistently fresh. 
> 
> Tonight I started thinking about the next contest -- the best contest
> of the year, may I say-- which is the 160 meter contest in less than
> two weeks, and so I set up the N6RK receiving loop and diversity
> reception. In so doing, I reminded myself of the major reason why I
> got the K3 all those years ago. As I type this I'm listening to 80 in
> diversity and it's almost spooky hearing signals swim around in the
> soundstage of my headphones. What would have been a deep fade turns
> into the gentle movement of the signal from left (main receiver on the
> horizontal) to right (sub on the loop) and back again. Amazing. If you
> haven't tried diversity, it's worth the effort. There's KI6BZT in
> Oakland, slightly biased toward the left headphone, occasionally
> leaking right of center, talking to K6UIP in Encinitas slammed to the
> right. And sure enough, Neil says he's on a vertical antenna. And
> further down the band, at 3508, an HK0 calling CQ, who I don't think I
> could have had a chance of hearing without diversity.
> 
> I'm sure I'll hear you on the 160, thanks to DUAL PB and diversity,
> but you probably won't hear me (but that's not the K3's fault;
> unfortunately, I'm on a very small city lot). I'll make my 50
> contacts, and I hope you're one of them.
> 
> Al  W6LX
> 
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Re: [Elecraft] Digitized IF over IP?

[Karin Johnson]

Hello:

I have done exactly this using an SDR-IQ as a downconverter to process the
IF output from a K2 and then Send the resulting time domain sampled
waveforms via a UDP connection from a remote site.  I have a highly modified
Version of POWERSDR that I use to display the Spectrum of the received UDP
stream.  I can select any of the Bandwidths supported by the SDR-IQ device
from a 6 kHz span up to 190 KHz span.  The bandwidth used by the UDP stream
is proportional to the span selected.  I use this with a remote radio
client/server software suite that I designed and coded myself.  

 

Karin Anne Johnson  P.E.  K3UU

Palm Harbor, FL 34685

 



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Re: [Elecraft] KX3 Field Ant. for 80/40/30

[donovanf]

Hi Eric, 


Don't give up on WSPRlite, with experience you'll learn that its an 
exceptionally powerful antenna evaluation tool. 


The "simultaneous spots" comparison tool on DXplorer.net allows you 
to select the maximum distance for the WSPR reports being evaluated. 
It also computes the mean and standard deviations in dB between the 
two WSPRlite transmitters (and antennas) being compared. There's 
no magic here. 


Because the ionosphere and your antennas are the media connecting 
your WSPRlite transmitters to WSPR receivers all over the world, 
its very important that you take steps to reduce interaction 
among the antennas being compared and to reduce the ionospheric 
variability affecting usefulness the reported data. The important 
necessary steps are: 


1. The antennas should transmit the same polarization. 


2. The antennas should be as close as possible but not so close that 
they interact with each other (EZNEC helps you reduce interactions) 


This discussion needs to move off of the Elecraft reflector, it has little 
to do with the purpose of this reflector or Elecraft products The 
WSPRlite page on Facebook is a better choice. 


73 
Frank 
W3LPL 

- Original Message -

From: "Erik Basilier"  
To: donw...@embarqmail.com, donov...@starpower.net, elecraft@mailman.qth.net 
Sent: Wednesday, November 22, 2017 8:43:57 AM 
Subject: RE: [Elecraft] KX3 Field Ant. for 80/40/30 

Don, please see my comments below: 

>About all you can conclude from the WSPR readings is the relative difference 
>between antennas. If you want to compare two horizontal antennas, place them 
>end to end. >The radiation at the end is at a minimum and the antenna will not 
>interact. 

Years ago I was under the naïve impression that if you buy a perfectly 
symmetrical GP, put it in a vertical position high up in the air, with no 
nearby metal objects, and run the coax perfectly vertically to a transmitter 
where the feeder hits the ground, you will get a nice pattern that is well 
predicted by a model. After all, the antenna manufacturer probably showed us 
that pattern in their catalog, and we have seen that pattern before in our 
antenna book. Well, not too long ago QST published an article that said 
(paraphrasing): "Not so fast. Sometimes you will get a very different pattern, 
and it may be terrible at the low elevation angles that you want." The reason: 
the feedline has current on the outside. How much will depend on its length. 
Putting a common mode choke at the feedpoint won't save you if the feedline is 
long; you may have to break up the current by several chokes along the line." 
The author supported this by theory as well as measurement. And why not? The 
feedline is a nearby metallic object, so why should it not affect the 
performance of the antenna? With that in mind, I have been expecting 
interaction also between two horizontal dipoles installed in line. I just went 
to EZNEC to check it. For the GP with a vertical, non-connected halfwave wire 
hanging under it, the center current in that wire came to about 1/4 of the GP 
drive current. The pattern was changed but not too badly. Then I modelled a 
horizontal dipole with another one mounted close off the end, in line. The 
center current in the non-driven dipole came to about 38% of the drive current 
in the driven dipole. The azimuth pattern was now a 4-clover similar to that of 
a full-wave dipole. In comparison tests where patterns are important, that is a 
lot of interaction between the two dipoles arranged end-to-end. I also modelled 
two horizontal dipoles mounted at right angles (one driven dipole end close to 
one end of non-driven dipole). Now the current in the undriven dipole got as 
high as about 58%. The azimuth pattern was now bidirectional with no difference 
front to back, but with a wider lobe on one of the sides. It seems that 
interaction is very significant regardless of orientation as long as the wires 
are close. 

>As for comparing a vertical with a horizontal antenna, or two verticals, the 
>only thing one can say is at that particular time and distance for 
>propagation, one antenna is better >than the other. That may not be true for 
>other propagation conditions, so be careful when generalizing. 
>As far as two horizonal antennas oriented in different directions, you would 
>expect greater signal strength in directions broadside to the antenna. That 
>directivity may be >useful in actual use, but is not a valid comparison 
>between the two antennas. 

Granted, but since I drank the WSPRLite antenna comparison coolaid, I view the 
ralated capability through a certain mental filter, which says, on the one 
hand, that it is a significant advancement in the art to using WSPR for antenna 
testing (the two WSPR transmitters combined with some special software 
proprietary to SOTABeams is more than just a combination of the transmitters), 
and on the other hand that the technique is based on certain assumptions that 
need to b

Re: [Elecraft] FLDIGI on Raspberry Pi PTT issue with the K2

[James Bennett]

Jim -

For what it’s worth……… I run a KX3 with an RPI3. I have FLDIGI and WSJT-X. I 
use HAMLIB. I’m also using the same Elecraft USB—>Serial cable. It “used” to 
work quite well - both could receive/transmit/and control the radio. I use VOX 
to make the radio squeal. Somewhere along the line, something broke. I have NOT 
upgraded anything in FLDIGI, but I have gotten the RPI3 to a pretty current 
version of the OS. WSJT-X continues to work pretty much perfectly. But FLDIGI - 
not so. 

My very uneducated Linux guess is that something in the OS has clobbered 
FLDIGI’s ability to work nicely with the radio. Unfortunately, my use of FLDIGI 
was quite infrequent in the past, and when it completely broke, I didn’t spend 
a whole lot of time working on a solution.

Anyway, while our two setups are a bit different, there may be an underlying 
“thing” in Raspian that has crippled FLDIGI. Should be interesting to see if 
anyone else has the same issue, and if they’ve found a cure.

73, Jim / W6JHB


> On Nov 21, 2017, at 6:54 PM, Elmore's  wrote:
> 
> Please carefully read everything that follows to avoid repetition of the 
> steps followed. What I have summarized here is the result of MANY hours of 
> work and extensive troubleshooting time via email with 2 incredibly helpful 
> and patient hams.
> 
> I have an RPi 3 with FLDIGI and WSJT-X installed.
> 
> After MUCH effort over the past 6 months I have WSJT-X working. My problem 
> now is that the PTT on the FLDIGI does not work.
> 
> The PTT on the WSJT-X does work. It's underlying rig control is Hamlib. I am 
> using the Elecraft USB to serial adapter connected to the proprietary K2 
> serial cable.
> 
> Note that I have successfully used the K2 with a Windows PC running FLDIGI 
> and WSJT-X for some time.
> 
> I have configured FLDIGI for RigCAT. It communicates with the K2 (frequency, 
> mode, filter selection) but no PTT.
> 
> I have also tried Hamlib but it will not initialize.
> 
> During an extensive troubleshooting process over the past 3 weeks with a ham 
> on the Yahoo FLDIGI RPi group I tried FLRIG. It is fully functional with the 
> K2 but when I try using it with FLDIGI nothing works – no frequency control, 
> no PTT, nothing! By this I mean that I am trying to use FLDIGI for the 
> control. I have verified that I have all the correct settings in both FLDIGI 
> and FLRIG with the ham that has been helping me. As a sanity check I 
> installed FLRIG on my Windows machine and successfully ran FLDIGI there.
> 
> Has anyone had similar issues?
> 
> Thanks for any help.
> 
> 73,
> Jim WA4YWM
> 
> ---
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Re: [Elecraft] KX3 Field Ant. for 80/40/30

[Erik Basilier]

Hi Frank,

 

I am not giving up on WSPRLite, but after I used EZNEC to look at  interactions 
last night, I will probably have to find a roomier antenna range than my own 
back yard.

 

I agree that it would be nice to move discussion about WSPRLite to somewhere 
else. I do sometimes look at the WSPRLite Facebook group, but I don’t like it, 
partly because I dislike the whole concept of Facebook, and partly because I 
don’t like the cluttery interface that makes it slow to use. I like yahoo 
groups better, even though there is a lot to criticize about the interface for 
those.

 

To those following this discussion in the Elecraft list, I want to apologize 
for the lack of formatting of my latest, very long post (and some earlier 
posts). I just haven’t learnt how to write a post in a proper editor and then 
transfer the content to a post while preserving the formatting. Any suggestions 
would be appreciated. Maybe there is some generic advice somewhere for all 
Nabble lists? In this short post I am separating paragraphs by return 
characters so that I see a single blank line between paragraphs. I am afraid 
that when you receive this, you will see too much space between paragraphs.

 

Also for the Elecrafters that don’t already know the WSPRLite concepts, I want 
to explain that when Frank refers to DXPlorer, that is the actual trade name 
for the proprietary software that takes the free WSPR data and creates from it 
a single performance number for each transmission. (That is also the number 
graphed together with the number from the other transmitter/antenna used for 
comparison.  In my previous posts I wanted to limit the post length by not 
mentioning the DXPlorer name. 

 

73,

Erik K7TV

 

From: donov...@starpower.net [mailto:donov...@starpower.net] 
Sent: Wednesday, November 22, 2017 10:42 AM
To: elecraft@mailman.qth.net
Cc: donw...@embarqmail.com; Erik Basilier 
Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30

 

Hi Eric,

 

Don't give up on WSPRlite, with experience you'll learn that its an

exceptionally powerful antenna evaluation tool.

 

The "simultaneous spots" comparison tool on DXplorer.net allows you

to select the maximum distance for the WSPR reports being evaluated. 

It also computes the mean and standard deviations in dB between the

two WSPRlite transmitters (and antennas) being compared.   There's

no magic here.

 

Because the ionosphere and your antennas are the media connecting

your WSPRlite transmitters to WSPR receivers all over the world,

its very important that you take steps to reduce interaction

among the antennas being compared and to reduce the ionospheric

variability affecting usefulness the reported data.  The important

necessary steps are:

 

1. The antennas should transmit the same polarization.

 

2. The antennas should be as close as possible but not so close that

they interact with each other (EZNEC helps you reduce interactions)

 

This discussion needs to move off of the Elecraft reflector, it has little

to do with the purpose of this reflector or Elecraft products  The

WSPRlite page on Facebook is a better choice.

 

73

Frank

W3LPL

 

  _  

From: "Erik Basilier" mailto:ebasil...@cox.net> >
To: donw...@embarqmail.com  , 
donov...@starpower.net  , 
elecraft@mailman.qth.net  
Sent: Wednesday, November 22, 2017 8:43:57 AM
Subject: RE: [Elecraft] KX3 Field Ant. for 80/40/30

Don, please see my comments below:

>About all you can conclude from the WSPR readings is the relative difference 
>between antennas.  If you want to compare two horizontal antennas, place them 
>end to end.  >The radiation at the end is at a minimum and the antenna will 
>not interact.

Years ago I was under the naïve impression that if you buy a perfectly 
symmetrical GP, put it in a vertical position high up in the air, with no 
nearby metal objects, and run the coax perfectly vertically to a transmitter 
where the feeder hits the ground, you will get a nice pattern that is well 
predicted by a model. After all, the antenna manufacturer probably showed us 
that pattern in their catalog, and we have seen that pattern before in our 
antenna book. Well, not too long ago QST published an article that said 
(paraphrasing): "Not so fast. Sometimes you will get a very different pattern, 
and it may be terrible at the low elevation angles that you want." The reason: 
the feedline has current on the outside. How much will depend on its length. 
Putting a common mode choke at the feedpoint won't save you if the feedline is 
long; you may have to break up the current by several chokes along the line." 
The author supported this by theory as well as measurement. And why not? The 
feedline is a nearby metallic object, so why should it not affect the 
performance of the antenna? With that in mind, I have been expecting 
interaction also between two horizontal dipoles installed in l

Re: [Elecraft] [K3] DUAL PB and Diversity

[Bill Johnson]

Gary, well stated.  The diversity of the K3(S) is amazing.  It has eliminated 
use of all other rigs in my shack except for the occasional KX3/X2 updates when 
not in portable.  Love the mode.  I use a vertical and horizontal loop as the 
two antennas.  I use the loop for transmitting.

73,
Bill
K9YEQ

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith
Sent: Wednesday, November 22, 2017 6:40 AM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] DUAL PB and Diversity

Al,

Nice read. I agree wholeheartedly with
you. I had never used the APF/DUAL PB
until Wayne, I believe it was, mentioned it some time back. I'd tried it in the 
beginning but wasn't skilled using the radio then and it was left by the 
wayside. 

I had used Diversity often and with great success, it always was a plus for me 
and any insertion loss was certainly either made up for by adding the preamp or 
at the least by the increased quality of the signal received. In my case I have 
the 200Hz filters in the main & Sub Rx board and often run the width down as 
tightly as possible and if I must, adjust the RF gain to compensate for band 
conditions and I don't find any ringing.  If the RF adjustment is causing a 
loss with band conditions, I open up the width a little and still use the RF, 
but not as aggressively.

With that, I miss nothing in there and
have as tight a width as possible with
excellent tone from my received signals. 
Add to that the magnificence of the SubRx and It's genius. I would never be 
without the Sub Receiver, it's to me, absolutely essential for me to copy as 
best is possible.

Happy Thanksgiving to all who celebrate it.  

73,

Gary
KA1J

> As has been the case for the past several years the only K3 control I 
> touched during the CW SS was the tuning knob because there was never 
> any reason to futz with anything else. Whatever settings I had simply 
> worked for every condition during the weekend, and besides, I always 
> seemed to be focused on signals and never on the rig itself, thanks to 
> this ability of the K3 to vanish while you're using it. This year I 
> operated with DUAL PB for the entire contest. With the context 
> bandwidth set to 500 Hz it sounded tight and open at the same time...
> really interesting... and I found it to be free of ringing. The K3 is 
> so highly configurable and DUAL PB is just one more way to make it 
> sound consistently fresh.
> 
> Tonight I started thinking about the next contest -- the best contest 
> of the year, may I say-- which is the 160 meter contest in less than 
> two weeks, and so I set up the N6RK receiving loop and diversity 
> reception. In so doing, I reminded myself of the major reason why I 
> got the K3 all those years ago. As I type this I'm listening to 80 in 
> diversity and it's almost spooky hearing signals swim around in the 
> soundstage of my headphones. What would have been a deep fade turns 
> into the gentle movement of the signal from left (main receiver on the
> horizontal) to right (sub on the loop) and back again. Amazing. If you 
> haven't tried diversity, it's worth the effort. There's KI6BZT in 
> Oakland, slightly biased toward the left headphone, occasionally 
> leaking right of center, talking to K6UIP in Encinitas slammed to the 
> right. And sure enough, Neil says he's on a vertical antenna. And 
> further down the band, at 3508, an HK0 calling CQ, who I don't think I 
> could have had a chance of hearing without diversity.
> 
> I'm sure I'll hear you on the 160, thanks to DUAL PB and diversity, 
> but you probably won't hear me (but that's not the K3's fault; 
> unfortunately, I'm on a very small city lot). I'll make my 50 
> contacts, and I hope you're one of them.
> 
> Al  W6LX
> 
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Re: [Elecraft] [K3] DUAL PB and Diversity

[lmarion]

You are so very correct. If you are not using the diversity  capability of 
the K3s, you are really missing out.


Leroy AB7CE

-Original Message- 
From: Bill Johnson

Sent: Wednesday, November 22, 2017 3:57 PM
To: g...@ka1j.com ; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] DUAL PB and Diversity

Gary, well stated.  The diversity of the K3(S) is amazing.  It has 
eliminated use of all other rigs in my shack except for the occasional 
KX3/X2 updates when not in portable.  Love the mode.  I use a vertical and 
horizontal loop as the two antennas.  I use the loop for transmitting.


73,
Bill
K9YEQ

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith

Sent: Wednesday, November 22, 2017 6:40 AM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] DUAL PB and Diversity

Al,

Nice read. I agree wholeheartedly with
you. I had never used the APF/DUAL PB
until Wayne, I believe it was, mentioned it some time back. I'd tried it in 
the beginning but wasn't skilled using the radio then and it was left by the 
wayside.


I had used Diversity often and with great success, it always was a plus for 
me and any insertion loss was certainly either made up for by adding the 
preamp or at the least by the increased quality of the signal received. In 
my case I have the 200Hz filters in the main & Sub Rx board and often run 
the width down as tightly as possible and if I must, adjust the RF gain to 
compensate for band conditions and I don't find any ringing.  If the RF 
adjustment is causing a loss with band conditions, I open up the width a 
little and still use the RF, but not as aggressively.


With that, I miss nothing in there and
have as tight a width as possible with
excellent tone from my received signals.
Add to that the magnificence of the SubRx and It's genius. I would never be 
without the Sub Receiver, it's to me, absolutely essential for me to copy as 
best is possible.


Happy Thanksgiving to all who celebrate it.

73,

Gary
KA1J


As has been the case for the past several years the only K3 control I
touched during the CW SS was the tuning knob because there was never
any reason to futz with anything else. Whatever settings I had simply
worked for every condition during the weekend, and besides, I always
seemed to be focused on signals and never on the rig itself, thanks to
this ability of the K3 to vanish while you're using it. This year I
operated with DUAL PB for the entire contest. With the context
bandwidth set to 500 Hz it sounded tight and open at the same time...
really interesting... and I found it to be free of ringing. The K3 is
so highly configurable and DUAL PB is just one more way to make it
sound consistently fresh.

Tonight I started thinking about the next contest -- the best contest
of the year, may I say-- which is the 160 meter contest in less than
two weeks, and so I set up the N6RK receiving loop and diversity
reception. In so doing, I reminded myself of the major reason why I
got the K3 all those years ago. As I type this I'm listening to 80 in
diversity and it's almost spooky hearing signals swim around in the
soundstage of my headphones. What would have been a deep fade turns
into the gentle movement of the signal from left (main receiver on the
horizontal) to right (sub on the loop) and back again. Amazing. If you
haven't tried diversity, it's worth the effort. There's KI6BZT in
Oakland, slightly biased toward the left headphone, occasionally
leaking right of center, talking to K6UIP in Encinitas slammed to the
right. And sure enough, Neil says he's on a vertical antenna. And
further down the band, at 3508, an HK0 calling CQ, who I don't think I
could have had a chance of hearing without diversity.

I'm sure I'll hear you on the 160, thanks to DUAL PB and diversity,
but you probably won't hear me (but that's not the K3's fault;
unfortunately, I'm on a very small city lot). I'll make my 50
contacts, and I hope you're one of them.

Al  W6LX

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This list hosted

[Elecraft] New KPA1500 feature: ATU TUNE integration with K3 and K3S transceivers

[Wayne Burdick]

If your KPA1500 is connected to a K3/K3S via the ACC cable, you’ll be able to 
tune the amplifier’s internal ATU without touching any controls on the 
transceiver.

For a manual tune, all that’s required is to tap the ATU TUNE switch on the 
amplifier. (Originally, three switch presses were required, because of the need 
to start and stop TUNE at the transceiver. This will now be handled 
automatically.)

For SWR-based re-tunes, the amplifier can now complete the ATU tuning cycle 
quickly even in SSB mode, with no operator intervention required.

Wayne


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Re: [Elecraft] . New KPA1500 feature

[William Stacy]

Wow! Now I am even more excited than I was before.

VY 73,
Bill, N5TU

Sent from Mail for Windows 10


Message: 16
Date: Wed, 22 Nov 2017 15:27:44 -0800
From: Wayne Burdick 
To: Elecraft Reflector 
Cc: elecraft...@yahoogroups.com
Subject: [Elecraft] New KPA1500 feature: ATU TUNE integration with K3
and K3S transceivers
Message-ID: 
Content-Type: text/plain; charset=utf-8

If your KPA1500 is connected to a K3/K3S via the ACC cable, you?ll be able to 
tune the amplifier?s internal ATU without touching any controls on the 
transceiver.

For a manual tune, all that?s required is to tap the ATU TUNE switch on the 
amplifier. (Originally, three switch presses were required, because of the need 
to start and stop TUNE at the transceiver. This will now be handled 
automatically.)

For SWR-based re-tunes, the amplifier can now complete the ATU tuning cycle 
quickly even in SSB mode, with no operator intervention required.

Wayne




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End of Elecraft Digest, Vol 163, Issue 27
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Re: [Elecraft] FLDIGI on Raspberry Pi PTT issue with the K2

[Brian Waterworth]

Hi Jim,

I don't think this is a serial port issue any more.  Why do I think that?
Because you said that fldigi does read the frequency, the mode, and the
filter width.  You also said that wsjtx, via hamlib, also controls the rig
(ptt as well) via the same hardware setup.  I assume you can change these
values (freq, etc.) in fldigi and the k2 changes in a commensurate
fashion.

Ok, what's next?  Hmmm... I assume you are using the K2.xml file from
https://sourceforge.net/projects/fldigi/files/xmls/elecraft/.  I wonder if
the ptt cat command is not correct in that file.  But you said fldigi on
windows works and I assume you are using the same rigcat file (k2.xml)??
Is that correct, are you using the same rigcat file I reference?

I had a quick look in that file (from fldigi rigs file download section on
sourceforge) and noticed a small error.  The following is incorrect from
the file on the site:

INIT
*3*
K22;


The highlighted 3 should be a 4.  The  is supposed to include the
semicolon in the  tag.  The effect of this error is that the K2
will likely not be placed in extended command mode.  The TX; and RX;
commands don't have extended modes.  But, perhaps other commands that need
extended mode might affect the TX and RX cat commands.  Not sure.  But,
certainly worth changing the k2.xml file in ~/.fldigi/rigs to correct the
error and then give it a try again.

Also, I noticed in Elecraft's documentation that the K2 must be in either
SSB or RTTY modes in order for TX; and RX; cat commands to function.  The
k2 won't respond when in CW to TX; and RX;.
http://www.elecraft.com/manual/KIO2%20Pgmrs%20Ref%20rev%20E.pdf.

I am not sure why Hamlib isn't working with Fldigi.  I haven't had much
luck with Hamlib and Fldigi and usually opted for rigcat.  Mostly because
it worked the first time (so I could start to operate and have fun) and I
was able to tinker with the cat commands to add more customized filter
widths and names than those provided in the kx3.xml rigcat file I use.

regards,
Brian
VE3IBW

On Tue, Nov 21, 2017 at 9:54 PM, Elmore's  wrote:

> Please carefully read everything that follows to avoid repetition of the
> steps followed. What I have summarized here is the result of MANY hours of
> work and extensive troubleshooting time via email with 2 incredibly helpful
> and patient hams.
>
> I have an RPi 3 with FLDIGI and WSJT-X installed.
>
> After MUCH effort over the past 6 months I have WSJT-X working. My problem
> now is that the PTT on the FLDIGI does not work.
>
> The PTT on the WSJT-X does work. It's underlying rig control is Hamlib. I
> am using the Elecraft USB to serial adapter connected to the proprietary K2
> serial cable.
>
> Note that I have successfully used the K2 with a Windows PC running FLDIGI
> and WSJT-X for some time.
>
> I have configured FLDIGI for RigCAT. It communicates with the K2
> (frequency, mode, filter selection) but no PTT.
>
> I have also tried Hamlib but it will not initialize.
>
> During an extensive troubleshooting process over the past 3 weeks with a
> ham on the Yahoo FLDIGI RPi group I tried FLRIG. It is fully functional
> with the K2 but when I try using it with FLDIGI nothing works – no
> frequency control, no PTT, nothing! By this I mean that I am trying to use
> FLDIGI for the control. I have verified that I have all the correct
> settings in both FLDIGI and FLRIG with the ham that has been helping me. As
> a sanity check I installed FLRIG on my Windows machine and successfully ran
> FLDIGI there.
>
> Has anyone had similar issues?
>
> Thanks for any help.
>
> 73,
> Jim WA4YWM
>
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