date:20090215


Is there such a list?  If not it might be a great resource for new K3
owners.

I will start.

Keying the K3 in QSK requires the radio also have VOX enabled and set to
full break in.

Default RTTY is AFSK if you are going to run FSK you need to change it for
each band.

Make sure your mark is set to 2125.  Data mode, pitch button.  

Hit the display button to see VFO B.

W0MU


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Re: [Elecraft] K3 Help with KRX3 Installation PL2 Error?

2009-02-15 Thread Allan Bacon


Problem solved, my lack of a detailed reading of the calibration steps was the 
culprit, when I Looked Up "Calibration" and did those steps on the main and 
sub, working great.
73,
Al
W6GBG



- Original Message 
From: Allan Bacon 
To: Elecraft@mailman.qth.net
Cc: Allan Bacon 
Sent: Sunday, February 15, 2009 9:17:44 PM
Subject: [Elecraft] K3 Help with KRX3 Installation PL2 Error?


K3 #2252 Factory built, now adding KRX3. Do not want an exotic setup, just want 
to listen on one frequency and transmit on another - same band, same antenna.

Completed installation with no problem, Used good static mat and wrist strap. 
Uploaded latest firmware. Unsed Config Menu to initialize as ANT-BMC (seemed 
like the default I wanted to use) . Do not have a TMP cable plugged in to J92, 
as I believe this is how to keep it simple for what I want to do.

Per troubleshooting chart on a PL2 Error, I tried recalibrating the VCO with 
VCO (CONGIG:VCO:MD), taped SBU, screen showed 255, and SUB starts flashing 
slowly. Rebooted, Still get PL2 Error.

VFO A and B seem to work fine

Looking for help please - 
73,
Al
W6GBG 
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Re: [Elecraft] Feature request

2009-02-15 Thread W0FK


Having a "quick split" feature would be great! My IC-7800 has that, and I
miss it on the K3. Hold split, enter the "up" split frequency (up 1, up 5,
etc.) and the seconnd VFO is there. No counting or adding.

Lou, W0FK 


W0MU Mike Fatchett wrote:
> 
> 
> <>
> 
> Yaesu has a feature called quick split that put the radio in split mode up
> 5
> or 10.  It was pretty handy.
> 
> <>
> 
> 


-
St. Louis, MO
K3 #2513
-- 
View this message in context: 
http://n2.nabble.com/Feature-request-tp2331196p2332968.html
Sent from the Elecraft mailing list archive at Nabble.com.

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[Elecraft] Elecraft SSB Net results (2/15/09)

2009-02-15 Thread Phil and Christina

We had another good SSB net today (1800Z) on 14.316 MHz.  We had 24
participants today, and there were a
number of good questions and comments.  The topics discussed included
compression settings and voice quality,
optimized RX EQ settings, ATU functions and other issues.  Several stations
got real time feedback on voice quality
that helped them set their compression levels.  Conditions were not great,
with many stations being weaker to net control than usual; and several
stations reported hearing few participants.
On the other hand, we had two check-ins from Alaska this week (one was even
mobile).

We started a few minutes early and ran about 45 minutes today.  Here is a
list of the participants:

Station NameQTH Rig S/N

KM5QWindy   NM  K3  764
W1TFTy  GA  K3  696
AB1KC   Bruce   RI  K3  2674
KL1JJim AK  K3  542
KB0YH   Gus CO  K3  441
N9YKE   Don WI  K3  2505
VE3MV   DougON  K3  2432
W1AIU   Joe CT  K3  269
K8DJC   Nelson  OH  K3  560
N7EDK   Ed  AZ  FT817   (K2 6576 being built)
W6VYBob CA  K3  1590
KE4WY   Jim KY  K3  2165
VE3QF   TonyON  K3  137
AC7SB   Peter   WA  K2  3016
K7SJRoger   WA  K3  75
N1LQDavid   MA  K3  371
KB1HCC/MHaggi   CT  FT857
W8FUBruce   OH  K3  2516
W0ZPT   ZaneMN  IC718
AI4TO/MMJohnFL  K2  5087
KE5POM  Frank   NM
KL7CWN/MLeonard AK  Icom
WD7ZJohnNM
NS7PPhilOR  K3  1826

Thanks to everybody who checked in.

73,

Phil, NS7P

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[Elecraft] SSB Mode

2009-02-15 Thread David Robertson

Graham and Everyone.

Every since I started using my K3 I never was comfirtable using data A mode for 
sound card digital communications. I have had lots of success using SSB mode.

73
Dave KD1NAJulian
Before you do anything drastic like looking for another radio, can I ask a
silly question or 2?
If the output power is flat across the AF spectrum when using ssb mode, why
doesn't everyone use it rather than DATA-A?
And since the output power is apparently so poorly controlled in DATA-A,
(with much higher power than called for) doesn't this actually give higher
rather than lower IMD?

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[Elecraft] K3 Help with KRX3 Installation PL2 Error?

2009-02-15 Thread Allan Bacon


K3 #2252 Factory built, now adding KRX3. Do not want an exotic setup, just want 
to listen on one frequency and transmit on another - same band, same antenna.

Completed installation with no problem, Used good static mat and wrist strap. 
Uploaded latest firmware. Unsed Config Menu to initialize as ANT-BMC (seemed 
like the default I wanted to use) . Do not have a TMP cable plugged in to J92, 
as I believe this is how to keep it simple for what I want to do.

Per troubleshooting chart on a PL2 Error, I tried recalibrating the VCO with 
VCO (CONGIG:VCO:MD), taped SBU, screen showed 255, and SUB starts flashing 
slowly. Rebooted, Still get PL2 Error.

VFO A and B seem to work fine

Looking for help please - 
73,
Al
W6GBG 
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Re: [Elecraft] K3: Configuring N1MM to send CW

2009-02-15 Thread Glenn Anderson

 Had this same problem. I am not using a USB- just a regular COM port. I
finally had to switch to the Kenwood TS 940 driver in n1mm. The K3 driver
would go into transmit as soon as I would try to select the DTR function.

Glenn

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Feidt
Sent: Sunday, February 15, 2009 4:28 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3: Configuring N1MM to send CW

I'm trying to set up N1MM to send CW to my K3 for ARRL DX CW next weekend.
I'm 
using the USB to Serial cable supplied by Elecraft.  The computer radio
control 
is working fine and I'm able to get spots, change bands, QSY to spots, etc.
I'm 
set up for SO1V. I've checked "CW" box on the same port (COM4) as is used
for 
radio control. The N1MM K3 "SupportedRadios" page 
(http://pages.cthome.net/n1mm/html/English/SupportedRadios.htm) says,

   The K3 accepts CW on DTR (pin 4) of the same COM port
   you're using to control the K3. Set N1MM to send CW on
   that port (Ports setup), and set PTT-KEY (second K3
   CONFIG menu) to OFF-DTR, and set the K3 for QSK. In
   other words, you don't need that transistor adapter unless
   you want to do SO2R.

However, when I set PTT-KEY to OFF-DTR, the K3 goes into "Test" output mode
and 
the transmitted in keyed continuously until I take it out of OFF-DTR.  The
K3 is 
set for QSK.

What am I doing wrong?

Any insight will be very much appreciated.

73,

Bill/NG3K





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Re: [Elecraft] Feature request

Merv,

As the ads for a popular brand sauce mix say "its already in there".
Check your CONFIG menu setting for SPLIT SV.  When set to NO, the split 
is lost when changing bands, but if set to YES, the settings for SPLIT, 
RIT, and XIT are saved on a per-band basis.
Per-band means that the settings are retained for any one band - it does 
not mean that the state is "sticky".  Set split ON for one band, and go 
to another band and see that split is off - when you return to the first 
band, it will still have split active if you have SPLIT SV set to ON.

73,
Don W3FPR

Merv Schweigert wrote:
>> Having the actual transmit freq PROMINENTLY displayed when you transmit on
>> CW with the decoder working would be a nice confirmation that you are indeed
>> xmitting where you think you are (split or not) - just listen to the K5D
>> xmit freq - looks like lots of folks need lots of reminders of just where
>> they are xmitting!  Perhaps it's just a human condition!
>>   
>> 
> Not sure what the answer here is,  but I have been caught a couple times
> now calling K5D on his freq,  and its the result of split dropping out when
> a band change is made.   If I am trying to work him on one band and have
> split set,  if I go to another band to check propagation and come back
> split is off again. 
> Either I have a setting incorrect for split or there needs to be some change
> in software to retain a band setting when jumping from band to band. 
> Please advise me if there is a setting to retain band freq and modes etc.
> It could be operator dumb thumbs on this end.
> Merv KH7C
>   
>
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Re: [Elecraft] K3/100 Assembly - Roofing Filter Loss Compensation (initial setup)

Walter,

The manual is updated periodically, but the information in the K3 
Utility is usually more recent.
Even using the most recent data, remember that even that information is 
only an average. Filters of the same width can vary in their actual 
loss.  So use the most recent data as a good starting point and then if 
you have a constant signal source, you can use the internal dBV meter in 
the K3 to determine exactly the gain settings for your particular set of 
filters.  Start from the widest and work toward the next most narrow 
filter when doing the 'fine adjustment'.

73,
Don W3FPR

Walter V. Gilles wrote:
> Greetings,
>  
> I'm performing initial configuration/filter loss compensation.  I have 
> the following filters (slot #) - BW:
>  
> (1) 13.0 kHz (FM)
> (2) 2.8kHz
> (3) 1.8 kHz
> (4) 0.40 kHz
> (5) n/a
>  
> I noticed that in the Owner's Manual, for Configuration/Filter Loss 
> Compensation, it suggests using 1-2 dB gain on the 0.40 kHz filter, 
> doesn't mention the 1.8 kHz filter. (No compensation for the others I 
> have is needed)
>  
> In the K3 Utility Help info, same subject, it suggests 2 db for the 
> 1.8 kHz and 7 dB for the 0.40 kHz filter, which it says Elecraft uses 
> for the factory assembled units.
>  
> I'm assuming that since there is a range of 0-8 dB gain defined for 
> filter insertion loss, overcompensating the gain on setup would not be 
> physically damaging to the K3, but perhaps it might not be 
> operationally optimum.  And per some traffic on the reflector on this, 
> it appears what is needed is just enough gain so as not to notice any 
> degradation (nor unnecessary gain perhaps) when a narrower BW filter 
> is switched in with its associated gain compensation.
>  
> I suppose I could start low and adjust upward if it seemed to need a 
> bit more boost, but 1-2 dB vs. 7 dB is a bit of a difference between 
> the Owner's Manual and the K3 Utility guidance.  As long as I can't 
> damage the K3 by maximizing the settings (?), then trial-and-error 
> might be the surest way, given individual K3 build deviations.  Any 
> words of wisdom appreciated on these different suggested settings 
> would be appreciated.  Thanks much.  73
>  
> Walter, N0DZJ
>
>
> 
>
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>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.0.237 / Virus Database: 270.10.23/1953 - Release Date: 02/14/09 
> 18:01:00
>
>   
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Re: [Elecraft] Feature request

2009-02-15 Thread Merv Schweigert


> Having the actual transmit freq PROMINENTLY displayed when you transmit on
> CW with the decoder working would be a nice confirmation that you are indeed
> xmitting where you think you are (split or not) - just listen to the K5D
> xmit freq - looks like lots of folks need lots of reminders of just where
> they are xmitting!  Perhaps it's just a human condition!
>   
Not sure what the answer here is,  but I have been caught a couple times
now calling K5D on his freq,  and its the result of split dropping out when
a band change is made.   If I am trying to work him on one band and have
split set,  if I go to another band to check propagation and come back
split is off again. 
Either I have a setting incorrect for split or there needs to be some change
in software to retain a band setting when jumping from band to band. 
Please advise me if there is a setting to retain band freq and modes etc.
It could be operator dumb thumbs on this end.
Merv KH7C
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Re: [Elecraft] K3/100 Assembly - Roofing Filter Loss Compensation (initial setup)

2009-02-15 Thread Lyle Johnson

Hello Walter!

I'd use the latest guidance.  The Utility is being updated to match.  It 
is possible to measure the loss directly suing a stable signal source, 
but it isn't critical.

For 1.8 kHz filter, I suggest 0 dB.

73,

Lyle KK7P
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[Elecraft] K3/100 Assembly - Roofing Filter Loss Compensation (initial setup)

2009-02-15 Thread Walter V. Gilles

Greetings,
 
I'm performing initial configuration/filter loss compensation.  I have the 
following filters (slot #) - BW: 
 
(1) 13.0 kHz (FM)
(2) 2.8kHz
(3) 1.8 kHz
(4) 0.40 kHz
(5) n/a
 
I noticed that in the Owner's Manual, for Configuration/Filter Loss 
Compensation, it suggests using 1-2 dB gain on the 0.40 kHz filter, doesn't 
mention the 1.8 kHz filter. (No compensation for the others I have is needed)
 
In the K3 Utility Help info, same subject, it suggests 2 db for the 1.8 kHz and 
7 dB for the 0.40 kHz filter, which it says Elecraft uses for the factory 
assembled units.
 
I'm assuming that since there is a range of 0-8 dB gain defined for filter 
insertion loss, overcompensating the gain on setup would not be physically 
damaging to the K3, but perhaps it might not be operationally optimum.  And per 
some traffic on the reflector on this, it appears what is needed is just enough 
gain so as not to notice any degradation (nor unnecessary gain perhaps) when a 
narrower BW filter is switched in with its associated gain compensation.
 
I suppose I could start low and adjust upward if it seemed to need a bit more 
boost, but 1-2 dB vs. 7 dB is a bit of a difference between the Owner's Manual 
and the K3 Utility guidance.  As long as I can't damage the K3 by maximizing 
the settings (?), then trial-and-error might be the surest way, given 
individual K3 build deviations.  Any words of wisdom appreciated on these 
different suggested settings would be appreciated.  Thanks much.  73
 
Walter, N0DZJ


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Re: [Elecraft] K3 Tap Power won't shut 'er down captin!

2009-02-15 Thread Joe Planisky

Hi Jeff,

Have you done the 12V Sense mod?

http://www.elecraft.com/K3/mods/KPA3_12V_Sense_Modification_Rev_A.pdf

73
--
Joe KB8AP

On Feb 15, 2009, at 4:46 PM, Jeff Wandling W7BRS wrote:

>
> Just started happening today.
>
> MCU 3.80.
>
> I tap power (to shut it off, just as I've always done)
>
> The LCD goes all-orange, no segments.  The Rx goes off.
>
> If I power cycle the power-supply the K3 comes back on in normal
> operation.
>
> Strange.
>
>
>
> --
> Jeff Wandling DE W7BRS K3 #2105 http://w7brs.com/k3
> j...@w7brs.com

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[Elecraft] K3 Tap Power won't shut 'er down captin!

2009-02-15 Thread Jeff Wandling W7BRS


Just started happening today.

MCU 3.80.

I tap power (to shut it off, just as I've always done)

The LCD goes all-orange, no segments.  The Rx goes off.

If I power cycle the power-supply the K3 comes back on in normal 
operation.

Strange.



--
Jeff Wandling DE W7BRS K3 #2105 http://w7brs.com/k3
j...@w7brs.com
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Re: [Elecraft] Feature request

Jim,

I don't worry about the negative comments.  Just because a couple people
don't like something does not mean that many others do. 

I have noticed that this list can be a bit on the harsh side especially with
new user type questions. 

Ideas and or thoughts are tossed out the Elecraft.  If they choose to make
changes great, if not great.

The goal is make the radio even better not just for one but for all.

Still learning and enjoying.

Mike W0MU



"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin
-Original Message-
From: JIM DAVIS [mailto:nn...@astound.net] 
Sent: Sunday, February 15, 2009 4:19 PM
To: W0MU Mike Fatchett; elecraft@mailman.qth.net
Subject: Re:Re: [Elecraft] Feature request

On Sun, 15 Feb 2009 12:56:47 -0700
  "W0MU Mike Fatchett"  wrote:
> If there is a way to do this already please excuse the request.
> 
> Radio without 2nd receiver
> 
> When working split it would be nice to display your transmit 
> frequency.  Say you have 21.295 for VFO A receiving K5D and VFO B at
21.305 for transmit.
> While I see the TX arrow on B it would be nice to see that you were 
> actually transmitting on 305 on the main display.
> 
> In split mode could it be possible to display the 2nd VFO frequency 
> and be able to change the vfo with the sub/rit knob.  In split I can't 
> recall ever needing to use the rit feature.
> 
> It would be nice to have immediate control over both vfo's if possible.
> 
> Yaesu has a feature called quick split that put the radio in split 
> mode up 5 or 10.  It was pretty handy.
> 
> 
> I guess it has been a while since I had a radio that did not have a 
> 2nd receiver or at least a radio that could listen two places on the same
band.
> 
> I have the 2nd receiver kit in the box.  It will be installed soon.  
> 
> Mike W0MU
> 
> "A slip of the foot you may soon recover, but a slip of the tongue you 
> may never get over." Ben Franklin
> 
> __
>Mike,

While you're right in your assumptioms that all of these other mis-steps can
be rectified via software revisions, you can, as I have experienced earlier,
that those questions are out here sometimes are MET with ridicule as I've
experienced!

Jim/nn6ee

PS,

When that happens obviously the "NEGATIVE COMMENTS" should be thrown in the
"GARBAGE!!!"

Jim/nn6ee
S/N 2406 (K3)


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Re: [Elecraft] Problem with Split Receive Audio?

I assume you have a stereo headset?
 
 
 

"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin 

 

  _  

From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tad Williamson
Sent: Sunday, February 15, 2009 4:52 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Problem with Split Receive Audio?


Sorry if this has been answered before, but I glanced through archives and
didn't really see this exact problem.
I just finished installing the KRX3 Subreceiver and as usual the
instructions were excellent!
Everything tested OK per the instructions and before I take the radio apart
and re-check my connections, I thought I'd pose the question here.
I can't seem to get the split-audio (hear the VFO-A audio in my left ear and
the VFO-B audio in my right ear).  I followed the steps in the manual but no
dice.
Anybody, got step-by-step instructions for making this happen?
Again, it may be a cabling problem or even a problem with the sub-receiver,
but I thought I'd see if anyone else had run accross this issue before.
Thanks, 73, Tad, WF4W



"What a long, strange trip it's been"
 
The Grateful Dead
 
Truckin'
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Re: [Elecraft] Problem with Split Receive Audio?

2009-02-15 Thread WILLIS COOKE

Do you have Sub AF Nor and Spkrs 2 set?

Willis 'Cookie' Cooke 
K5EWJ


--- On Sun, 2/15/09, Tad Williamson  wrote:

> From: Tad Williamson 
> Subject: [Elecraft] Problem with Split Receive Audio?
> To: elecraft@mailman.qth.net
> Date: Sunday, February 15, 2009, 3:51 PM
> Sorry if this has been answered before, but I glanced
> through archives and didn't really see this exact
> problem.
> I just finished installing the KRX3 Subreceiver and as
> usual the instructions were excellent!
> Everything tested OK per the instructions and before I take
> the radio apart and re-check my connections, I thought
> I'd pose the question here.
> I can't seem to get the split-audio (hear the VFO-A
> audio in my left ear and the VFO-B audio in my right ear). 
> I followed the steps in the manual but no dice.
> Anybody, got step-by-step instructions for making this
> happen?
> Again, it may be a cabling problem or even a problem with
> the sub-receiver, but I thought I'd see if anyone else
> had run accross this issue before.
> Thanks, 73, Tad, WF4W
> 
> 
> 
> "What a long, strange trip it's been"
>  
> The Grateful Dead
>  
> Truckin'__
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> 
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[Elecraft] Problem with Split Receive Audio?

2009-02-15 Thread Tad Williamson

Sorry if this has been answered before, but I glanced through archives and 
didn't really see this exact problem.
I just finished installing the KRX3 Subreceiver and as usual the instructions 
were excellent!
Everything tested OK per the instructions and before I take the radio apart and 
re-check my connections, I thought I'd pose the question here.
I can't seem to get the split-audio (hear the VFO-A audio in my left ear and 
the VFO-B audio in my right ear).  I followed the steps in the manual but no 
dice.
Anybody, got step-by-step instructions for making this happen?
Again, it may be a cabling problem or even a problem with the sub-receiver, but 
I thought I'd see if anyone else had run accross this issue before.
Thanks, 73, Tad, WF4W



"What a long, strange trip it's been"
 
The Grateful Dead
 
Truckin'__
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[Elecraft] Problem with Split Receive Audio?

2009-02-15 Thread Tad Williamson

Sorry if this has been answered before, but I glanced through archives and 
didn't really see this exact problem.
I just finished installing the KRX3 Subreceiver and as usual the instructions 
were excellent!
Everything tested OK per the instructions and before I take the radio apart and 
re-check my connections, I thought I'd pose the question here.
I can't seem to get the split-audio (hear the VFO-A audio in my left ear and 
the VFO-B audio in my right ear).  I followed the steps in the manual but no 
dice.
Anybody, got step-by-step instructions for making this happen?
Again, it may be a cabling problem or even a problem with the sub-receiver, but 
I thought I'd see if anyone else had run accross this issue before.
Thanks, 73, Tad, WF4W



"What a long, strange trip it's been"
 
The Grateful Dead
 
Truckin'__
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[Elecraft] K3-KRX3 Clarification

2009-02-15 Thread Terry Schieler

Got it now!  Thanks to all who responded directly and so quickly.  Finally
got through this think skull of mine!

 

73 de Terry, WØFM

 

___

 

I am completing the installation of my KRX3.  I am electing to share the
selected antenna (ANT-1 or ANT-2) with the sub receiver.  I have the KAT3
installed.  Do I still need to connect the 12 TMP cable between the KRX3
and J92 on the KAT3, or is this connection made somewhere else in the
circuitry?

 

On page 37 of my KRX3 installation manual (Rev. A) it states If installed,
attach the antenna cable connected to either the KAT3 or to the AUX RF BNC
jack on the rear panel to J92 at the end of the KRX3 as shown.  I DO have
the KAT3 installed, but am confused if this cable is REQUIRED for the sub
receiver to work at all, or if this step is referencing the option to
Installing the Auxiliary KRX3 Antenna Input Via the KAT3 which I have
elected to pass on. 

 

I dont see any other way of the signal getting from the ANT connection on
the back of the rig to the sub receiver, but, then again, there are a number
of multi-pin connections on the sub receiver.

 

Please respond direct as I am in digest mode and would like to wrap this up
this afternoon if possible.  My call AT swbell DOT net.

 

Many thanks.

73,

Terry, WØFM

K3/100 #474

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Re: [Elecraft] K3-KRX3 Clarification

2009-02-15 Thread Bill W4ZV




BigAlT wrote:
> 
>  You only need to connect a TMP cable to J92 on the KRX3 if you want to
> use an auxiliary input for the KRX3 ( either via the BNC connector that
> comes with the KRX3 or via the KAT3 antenna terminal that is not being
> used for the main RX and TX, you can use only one of these options ). If
> you don't want to use an auxiliary antenna at all you don't have to
> connect anything to J92 on the KRX3. See pages 24 thru 29 of the KRX3
> installation/operation Manual Revision C.
> 

You might want to wire up AUX RF BNC/TMP assembly even though you have no
immediate plans to use it.  You can route the TMP cable and tape it safely
out of the way.  This will save a LOT of work later if you ever decide you
need it.

73,  Bill

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Re: [Elecraft] Feature request

2009-02-15 Thread Bill W4ZV




W0MU Mike Fatchett wrote:
> 
> If there is a way to do this already please excuse the request.
> 
> Radio without 2nd receiver
> 
> When working split it would be nice to display your transmit frequency. 
> Say
> you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for transmit.
> While I see the TX arrow on B it would be nice to see that you were
> actually
> transmitting on 305 on the main display.
> 

TAP DISP.  You must have DISP set to read one of the other options like
TIME, etc.

73,  Bill

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http://n2.nabble.com/Feature-request-tp2331196p2331993.html
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Re: [Elecraft] Feature request

2009-02-15 Thread JIM DAVIS

On Sun, 15 Feb 2009 12:56:47 -0700
  "W0MU Mike Fatchett"  wrote:
> If there is a way to do this already please excuse the request.
> 
> Radio without 2nd receiver
> 
> When working split it would be nice to display your transmit frequency.  Say
> you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for transmit.
> While I see the TX arrow on B it would be nice to see that you were actually
> transmitting on 305 on the main display.
> 
> In split mode could it be possible to display the 2nd VFO frequency and be
> able to change the vfo with the sub/rit knob.  In split I can't recall ever
> needing to use the rit feature.
> 
> It would be nice to have immediate control over both vfo's if possible.
> 
> Yaesu has a feature called quick split that put the radio in split mode up 5
> or 10.  It was pretty handy.
> 
> 
> I guess it has been a while since I had a radio that did not have a 2nd
> receiver or at least a radio that could listen two places on the same band.
> 
> I have the 2nd receiver kit in the box.  It will be installed soon.  
> 
> Mike W0MU
> 
> "A slip of the foot you may soon recover, but a slip of the tongue you may
> never get over." Ben Franklin
> 
> __
>Mike,

While you're right in your assumptioms that all of these other mis-steps can be 
rectified via
software revisions, you can, as I have experienced earlier, that those 
questions are out here
sometimes are MET with ridicule as I've experienced!

Jim/nn6ee

PS,

When that happens obviously the "NEGATIVE COMMENTS" should be thrown in the 
"GARBAGE!!!"

Jim/nn6ee
S/N 2406 (K3)

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Re: [Elecraft] K3-KRX3 Clarification

2009-02-15 Thread BigAlT


Terry,
 You only need to connect a TMP cable to J92 on the KRX3 if you want to use
an auxiliary input for the KRX3 ( either via the BNC connector that comes
with the KRX3 or via the KAT3 antenna terminal that is not being used for
the main RX and TX, you can use only one of these options ). If you don't
want to use an auxiliary antenna at all you don't have to connect anything
to J92 on the KRX3. See pages 24 thru 29 of the KRX3 installation/operation
Manual Revision C.
 Al
 WB6HPF

Terry Schieler wrote:
> 
> I am completing the installation of my KRX3.  I am electing to share the
> selected antenna (ANT-1 or ANT-2) with the sub receiver.  I have the KAT3
> installed.  Do I still need to connect the 12 TMP cable between the KRX3
> and J92 on the KAT3, or is this connection made somewhere else in the
> circuitry?
> 
>  
> 
> On page 37 of my KRX3 installation manual (Rev. A) it states If
> installed,
> attach the antenna cable connected to either the KAT3 or to the AUX RF BNC
> jack on the rear panel to J92 at the end of the KRX3 as shown.  I DO have
> the KAT3 installed, but am confused if this cable is REQUIRED for the sub
> receiver to work at all, or if this step is referencing the option to
> Installing the Auxiliary KRX3 Antenna Input Via the KAT3 which I have
> elected to pass on. 
> 
>  
> 
> I dont see any other way of the signal getting from the ANT connection on
> the back of the rig to the sub receiver, but, then again, there are a
> number
> of multi-pin connections on the sub receiver.
> 
>  
> 
> Please respond direct as I am in digest mode and would like to wrap this
> up
> this afternoon if possible.  My call AT swbell DOT net.
> 
>  
> 
> Many thanks.
> 
> 73,
> 
> Terry, WØFM
> 
> K3/100 #474
> 
> 
> __
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> 

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http://n2.nabble.com/K3-KRX3-Clarification-tp2331790p2331953.html
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[Elecraft] k3 hrd 2 radios 1 pc

2009-02-15 Thread bill wade

Thanks, Dave, g4aon for the information. Guess I need to get a rs-232-to 
usb cable from Elecraft. The 232-to-232 cable wouldn't work. The 9 pin 
232 on the PC refused to be recognized. XP didn't even show a "new 
hardware found"  after it was installed between the PC & the K3. It's a 
pleasure to have such support.

Bill Wade Ai4PF
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Re: [Elecraft] Feature request

The key was that I was not seeing the VFO frequency on the display.  I guess
I need to hit the display key.

If I can tune both vfo's at the same time then life is grand.

Still learning the K3.  I'm not that old and I can learn new tricks.  A bit
of Yaesu unlearning is in process.

The reason for showing me where I am really transmitting is because you can
easily mess up and end up transmitting on A when you really meant B.  So
either you end up transmitting out of our band or you get an earful about up
up up lol.

The FT2000 had red and green lights that told you what was going on with
each vfo.  Red for transmit and green for receive.

Ken, you must have been down at KP5 with W0UN and KP2A?  Sounded like a
great place not to vacation. 


"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
Sent: Sunday, February 15, 2009 1:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Feature request


Hi Mike,

When working split it would be nice to display your transmit frequency.

While in SPLIT mode, I see the TX frequency (VFO B) displayed
in the VFO B window, with a TX-labeled arrow pointing at B.

Say you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for
transmit.  While I see the TX arrow on B it would be nice to see that you
were actually transmitting on 305 on the main display.

While in SPLIT mode where else -could- you be transmitting?
Why would you need to be shown this information in a second
place at the same time?

In split mode could it be possible to display the 2nd VFO frequency and be
able to change the vfo with the sub/rit knob.  In split I can't recall ever
needing to use the rit feature.

You can change the VFO B frequency with the VFO B knob,
either by turning the knob and reading the resulting change in the
VFO B window or by tapping A/B to swap the VFO's to put
yourself on the frequency of the calling station.  I think this is
what you want to do.

SUB is a button and RIT is a knob.  I don't follow what you're
suggesting.  I agree, I've never had occasion to either RIT or XIT
in SPLIT ... or in any situation, for that matter ... but the
results of
a change to either are displayed in the respective window if either
is enabled.  Actually, I -never- use either RIT or XIT, but that's
just a personal preference.

It would be nice to have immediate control over both vfo's if possible.

You do ... by turning each VFO's knob.

Heard you in a K5D pile-up today, BTW.  I operated from there
in the mid-90's ... a miserable place, too. (:-)

73! Ken Kopp - K0PP


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[Elecraft] K3-KRX3 Clarification

2009-02-15 Thread Terry Schieler

I am completing the installation of my KRX3.  I am electing to share the
selected antenna (ANT-1 or ANT-2) with the sub receiver.  I have the KAT3
installed.  Do I still need to connect the 12 TMP cable between the KRX3
and J92 on the KAT3, or is this connection made somewhere else in the
circuitry?

 

On page 37 of my KRX3 installation manual (Rev. A) it states If installed,
attach the antenna cable connected to either the KAT3 or to the AUX RF BNC
jack on the rear panel to J92 at the end of the KRX3 as shown.  I DO have
the KAT3 installed, but am confused if this cable is REQUIRED for the sub
receiver to work at all, or if this step is referencing the option to
Installing the Auxiliary KRX3 Antenna Input Via the KAT3 which I have
elected to pass on. 

 

I dont see any other way of the signal getting from the ANT connection on
the back of the rig to the sub receiver, but, then again, there are a number
of multi-pin connections on the sub receiver.

 

Please respond direct as I am in digest mode and would like to wrap this up
this afternoon if possible.  My call AT swbell DOT net.

 

Many thanks.

73,

Terry, WØFM

K3/100 #474

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[Elecraft] K3: Configuring N1MM to send CW

2009-02-15 Thread Bill Feidt

I'm trying to set up N1MM to send CW to my K3 for ARRL DX CW next weekend.  I'm 
using the USB to Serial cable supplied by Elecraft.  The computer radio control 
is working fine and I'm able to get spots, change bands, QSY to spots, etc. I'm 
set up for SO1V. I've checked "CW" box on the same port (COM4) as is used for 
radio control. The N1MM K3 "SupportedRadios" page 
(http://pages.cthome.net/n1mm/html/English/SupportedRadios.htm) says,

   The K3 accepts CW on DTR (pin 4) of the same COM port
   you're using to control the K3. Set N1MM to send CW on
   that port (Ports setup), and set PTT-KEY (second K3
   CONFIG menu) to OFF-DTR, and set the K3 for QSK. In
   other words, you don't need that transistor adapter unless
   you want to do SO2R.

However, when I set PTT-KEY to OFF-DTR, the K3 goes into "Test" output mode and 
the transmitted in keyed continuously until I take it out of OFF-DTR.  The K3 
is 
set for QSK.

What am I doing wrong?

Any insight will be very much appreciated.

73,

Bill/NG3K





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Re: [Elecraft] Feature request

2009-02-15 Thread rfenabled

I agree!
Gary
Vk4wt.
Sent via BlackBerry® from Telstra

-Original Message-
From: "Bob Serwy" 

Date: Sun, 15 Feb 2009 16:18:42 
To: 
Subject: Re: [Elecraft] Feature request

 I for one would not like this change.  I have this on my Icoms and never
liked it.

Bob Serwy - N9RS

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Nesbitt
Sent: Sunday, February 15, 2009 4:11 PM
To: 'Ken Kopp'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Feature request

Having the actual transmit freq PROMINENTLY displayed when you transmit on
CW with the decoder working would be a nice confirmation that you are indeed
xmitting where you think you are (split or not) - just listen to the K5D
xmit freq - looks like lots of folks need lots of reminders of just where
they are xmitting!  Perhaps it's just a human condition!

What I'd REALLY like to see is the actual xmit freq displayed on the top
line (VFO A display line where the readout is a larger size).  Then if you
are split it would display VFO A freq (rx freq as it does normally) until
you hit xmit and then would display VFO B freq (where you are xmitting) on
that line - sort of flip-flop the data. When you quit xmitting, VFO A would
again be displayed as usual and - if the text decode is turned on - the VFO
B line would again display the decoded text. 'Course with QSK this could be
quite dazzling! 

Of course there are lots of other scenarios where this extra little prodding
might be very useful - those are left as an exercise to the reader!

73 es gud dxing --Don N4HH K3/100 #83

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
Sent: Sunday, February 15, 2009 3:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Feature request

Hi Mike,

When working split it would be nice to display your transmit frequency.

While in SPLIT mode, I see the TX frequency (VFO B) displayed
in the VFO B window, with a TX-labeled arrow pointing at B.

Say you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for
transmit.  While I see the TX arrow on B it would be nice to see that you
were actually transmitting on 305 on the main display.

While in SPLIT mode where else -could- you be transmitting?
Why would you need to be shown this information in a second
place at the same time?

In split mode could it be possible to display the 2nd VFO frequency and be
able to change the vfo with the sub/rit knob.  In split I can't recall ever
needing to use the rit feature.

You can change the VFO B frequency with the VFO B knob,
either by turning the knob and reading the resulting change in the
VFO B window or by tapping A/B to swap the VFO's to put
yourself on the frequency of the calling station.  I think this is
what you want to do.

SUB is a button and RIT is a knob.  I don't follow what you're
suggesting.  I agree, I've never had occasion to either RIT or XIT
in SPLIT ... or in any situation, for that matter ... but the
results of
a change to either are displayed in the respective window if either
is enabled.  Actually, I -never- use either RIT or XIT, but that's
just a personal preference.

It would be nice to have immediate control over both vfo's if possible.

You do ... by turning each VFO's knob.

Heard you in a K5D pile-up today, BTW.  I operated from there
in the mid-90's ... a miserable place, too. (:-)

73! Ken Kopp - K0PP

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Checked by AVG - www.avg.com
Version: 8.0.237 / Virus Database: 270.10.23/1953 - Release Date: 02/14/09
18:01:00

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Re: [Elecraft] Feature request

2009-02-15 Thread Bob Serwy

 I for one would not like this change.  I have this on my Icoms and never
liked it.


Bob Serwy - N9RS

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Nesbitt
Sent: Sunday, February 15, 2009 4:11 PM
To: 'Ken Kopp'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Feature request

Having the actual transmit freq PROMINENTLY displayed when you transmit on
CW with the decoder working would be a nice confirmation that you are indeed
xmitting where you think you are (split or not) - just listen to the K5D
xmit freq - looks like lots of folks need lots of reminders of just where
they are xmitting!  Perhaps it's just a human condition!

What I'd REALLY like to see is the actual xmit freq displayed on the top
line (VFO A display line where the readout is a larger size).  Then if you
are split it would display VFO A freq (rx freq as it does normally) until
you hit xmit and then would display VFO B freq (where you are xmitting) on
that line - sort of flip-flop the data. When you quit xmitting, VFO A would
again be displayed as usual and - if the text decode is turned on - the VFO
B line would again display the decoded text. 'Course with QSK this could be
quite dazzling! 

Of course there are lots of other scenarios where this extra little prodding
might be very useful - those are left as an exercise to the reader!
  
73 es gud dxing --Don N4HH K3/100 #83

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
Sent: Sunday, February 15, 2009 3:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Feature request


Hi Mike,

When working split it would be nice to display your transmit frequency.

While in SPLIT mode, I see the TX frequency (VFO B) displayed
in the VFO B window, with a TX-labeled arrow pointing at B.

Say you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for
transmit.  While I see the TX arrow on B it would be nice to see that you
were actually transmitting on 305 on the main display.

While in SPLIT mode where else -could- you be transmitting?
Why would you need to be shown this information in a second
place at the same time?

In split mode could it be possible to display the 2nd VFO frequency and be
able to change the vfo with the sub/rit knob.  In split I can't recall ever
needing to use the rit feature.

You can change the VFO B frequency with the VFO B knob,
either by turning the knob and reading the resulting change in the
VFO B window or by tapping A/B to swap the VFO's to put
yourself on the frequency of the calling station.  I think this is
what you want to do.

SUB is a button and RIT is a knob.  I don't follow what you're
suggesting.  I agree, I've never had occasion to either RIT or XIT
in SPLIT ... or in any situation, for that matter ... but the
results of
a change to either are displayed in the respective window if either
is enabled.  Actually, I -never- use either RIT or XIT, but that's
just a personal preference.

It would be nice to have immediate control over both vfo's if possible.

You do ... by turning each VFO's knob.

Heard you in a K5D pile-up today, BTW.  I operated from there
in the mid-90's ... a miserable place, too. (:-)

73! Ken Kopp - K0PP


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Re: [Elecraft] Feature request

2009-02-15 Thread Don Nesbitt

Having the actual transmit freq PROMINENTLY displayed when you transmit on
CW with the decoder working would be a nice confirmation that you are indeed
xmitting where you think you are (split or not) - just listen to the K5D
xmit freq - looks like lots of folks need lots of reminders of just where
they are xmitting!  Perhaps it's just a human condition!

What I'd REALLY like to see is the actual xmit freq displayed on the top
line (VFO A display line where the readout is a larger size).  Then if you
are split it would display VFO A freq (rx freq as it does normally) until
you hit xmit and then would display VFO B freq (where you are xmitting) on
that line - sort of flip-flop the data. When you quit xmitting, VFO A would
again be displayed as usual and - if the text decode is turned on - the VFO
B line would again display the decoded text. 'Course with QSK this could be
quite dazzling! 

Of course there are lots of other scenarios where this extra little prodding
might be very useful - those are left as an exercise to the reader!
  
73 es gud dxing --Don N4HH K3/100 #83

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Kopp
Sent: Sunday, February 15, 2009 3:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Feature request


Hi Mike,

When working split it would be nice to display your transmit frequency.

While in SPLIT mode, I see the TX frequency (VFO B) displayed
in the VFO B window, with a TX-labeled arrow pointing at B.

Say you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for
transmit.  While I see the TX arrow on B it would be nice to see that 
you
were actually transmitting on 305 on the main display.

While in SPLIT mode where else -could- you be transmitting?
Why would you need to be shown this information in a second
place at the same time?

In split mode could it be possible to display the 2nd VFO frequency and 
be
able to change the vfo with the sub/rit knob.  In split I can't recall 
ever
needing to use the rit feature.

You can change the VFO B frequency with the VFO B knob,
either by turning the knob and reading the resulting change in 
the
VFO B window or by tapping A/B to swap the VFO's to put
yourself on the frequency of the calling station.  I think this 
is
what you want to do.

SUB is a button and RIT is a knob.  I don't follow what you're
suggesting.  I agree, I've never had occasion to either RIT or 
XIT
in SPLIT ... or in any situation, for that matter ... but the 
results of
a change to either are displayed in the respective window if 
either
is enabled.  Actually, I -never- use either RIT or XIT, but 
that's
just a personal preference.

It would be nice to have immediate control over both vfo's if possible.

You do ... by turning each VFO's knob.

Heard you in a K5D pile-up today, BTW.  I operated from there
in the mid-90's ... a miserable place, too. (:-)

73! Ken Kopp - K0PP


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Re: [Elecraft] K3 power creep

2009-02-15 Thread Joe Planisky

Hi Ron,

I can't comment on whether this is normal or a problem, but I can  
confirm that I see the same thing in AFSK-A mode, so it's not just  
you :-) I believe it is ALC related.

73
--
Joe KB8AP



On Feb 15, 2009, at 1:25 PM, Ron W3ZV wrote:

> ...

> Typically
> when changing from 300 watts to 250, I would see 180 out on first
> transmission, which would creep toward 250 during the transmission.  
> This
> is what show on my amp PO meter, so it is somewhat less than a  
> precision
> measurement.
>
> ...
>
> Is this normal, perhaps ALC related, or a problem.
>
> Ron W3ZV

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[Elecraft] K3 power creep

2009-02-15 Thread Ron W3ZV

My normal RTTY contest mode is S&P. I am using AFSK A mode. When I am 
doing this with my K3 and FL-7000, I set my drive so I get about 300 
watts out of the amp. On the rare occasion that I try to hold a 
frequency long enough to run on it, I back off the power so that the amp 
runs 250 watts. Not much difference, but I feel better about it. I 
noticed during the CQ WPX that after each power change, the amp output 
is lower than expected and creeps up during the first transmission. All 
subsequent transmissions are where I want them and steady. Typically 
when changing from 300 watts to 250, I would see 180 out on first 
transmission, which would creep toward 250 during the transmission. This 
is what show on my amp PO meter, so it is somewhat less than a precision 
measurement.

I had been using FSK in the past ( and will again shortly) and don't 
remember seeing this before. However, like my amp's PO meter, my memory 
is not a precision instrument.

Is this normal, perhaps ALC related, or a problem.

Ron W3ZV


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Re: [Elecraft] K3 Beta firmware rev. 2.82




Graham Kimbell (G3TCT) wrote:
> 
> Julian
> Before you do anything drastic like looking for another radio, can I ask a
> silly question or 2?
> If the output power is flat across the AF spectrum when using ssb mode,
> why
> doesn't everyone use it rather than DATA-A?
> 
Well the main reason as I said in my post that I sent about the same time
you were writing yours is that it is a hassle changing all the EQ, switching
the input from MIC to LINE IN and remembering to turn off the compression.
Of course some people may work digi all the time and never use a mic, in
which case it would be the most sensible option. But I don't want to go
through all that when I hear someone on SSB that I would like to call. Plus,
many programs know what mode the K3 is in and won't do data if SSB is
selected.


> And since the output power is apparently so poorly controlled in DATA-A,
> (with much higher power than called for) doesn't this actually give higher
> rather than lower IMD?
> 
Yes, although as long as the power is below 100W the IMD should still be
within acceptable limits.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
-- 
View this message in context: 
http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvements-to-AFSK-A%2C-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2331424.html
Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread Guy Olinger, K2AV

My MP has those bumps also, and it's full of INRAD's.

With only a minor amount of Spectrogram investigation in my K3, I see a 2db 
variation across the passband in the 2.7 filter.  It is easily seen on RX, 
particularly if one lies about how wide it is to put the DSP out at 4.0 
whilst being confined only by the 2.7 roofing filter.  Further the 2.7 
filters on my 2 RX K3's have nearly identical response, and the order of the 
bumps reverses perfectly when I go from DATA to DATA REV.  Whether that 
would be more predictable with a 2.8 8 pole filter would depend.  I don't 
own one so cannot comment. (The shape of the two 2.7's are closer than the 
shapes on the two 1.8's.)

Therefore, without TX EQ set only for DATA mode, power will vary up and down 
depending on the filter when using a fixed segment audio width of the band 
and letting the PSK program pick the transmit audio tone.

I note that me ears cannot detect changes in the mid-passband.  What I hear 
when shifting RX passband is the drop or addition of lows and highs as the 
passband *skirts* move.  This is to enforce that for SSB, the passband 
ripple cannot be heard.

The data mode transmit exposes what the ear cannot hear only because 
operators apparently look for variability less than half a db.  Given the 
characteristics of some amplifier tubes and the sudden onset of grid 
saturation and high current, etc, the desire to control power is 
understandable.

Given the circumstances, would seem to be an interesting idea to have a data 
mode only TX eq that flattens out the filter *and properly flips* for data 
rev mode.  It would remain to be seen, though whether introduction of the 
equalization does anything negative to transmitted IMD.

Approaching it from the other direction, Wayne & Co seem reluctant to 
embrace any automatic leveling of data mode transmitted power. It would seem 
on the surface that data is far more predictable than SSB, that a quick 
attack, slow release and clamped-across-RX-state auto gain adjustment would 
work well. There may be a lot more to it than that, but this too seems a 
good idea.

73, Guy.

- Original Message - 
From: "Kok Chen" 
To: "elecraft list" 
Sent: Sunday, February 15, 2009 12:31 PM
Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82

> On Feb 15, 2009, at 2/158:58 AM, Guy Olinger, K2AV wrote:
>
>> Taking the DATA A readings below at face value, the more than 2 db
>> bump
>> around 1000 Hz is rather startling. I'm not sure what could cause
>> that, but
>> at least to me that seems to be screaming for an explanation.
>> There's an
>> old fireman's adage "never go past fire" to keep from being trapped
>> by fire
>> closing around behind.
>
> While I agree that a 2 dB bump is really, really bad for us guys who
> use frequency-agile digital transmission, this phenomenon is not
> restricted to just the K3.
>
> The FT-1000MP has a similar 3 dB peak when you select PKT (i.e.,
> AFSK); and, like the K3, the rig is flat when using voice SSB
> modes.   In the case of the FT-1000MP, it appears to be a
> deliberately designed peaking -- the peak is "centered" near the AFSK
> tone pair that you have selected to use.
>
> To see the FT-1000MP's variability, you can look at the following URL
>
> http://homepage.mac.com/chen/w7ay/cocoaModem/UsersManual/
> UsersManual.html#equalizer
>
> Scroll below the two control panels and you will see the graphical
> display of the variability.  (In this program, you enter the measured
> power in that second column on the left, and the program splines the
> "curve" to produce the power correction that is applied to the
> transmitted signal when you "click on the waterfall.")
>
> 73
> Chen, W7AY
>
> __
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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread Graham Kimbell (G3TCT)

Julian
Before you do anything drastic like looking for another radio, can I ask a
silly question or 2?
If the output power is flat across the AF spectrum when using ssb mode, why
doesn't everyone use it rather than DATA-A?
And since the output power is apparently so poorly controlled in DATA-A,
(with much higher power than called for) doesn't this actually give higher
rather than lower IMD?

Graham
- Original Message -
From: "Julian, G4ILO" 
To: 
Sent: Sunday, February 15, 2009 11:14 AM
Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82


>
> I have just run a set of tests across a range of audio frequencies as did
> Joe, KB8AP. The results were almost identical, so I am not going to
tabulate
> them here. In SSB I adjusted the input level to give sufficient drive and
> just enough ALC action to result in a flat output from 600Hz to 2600Hz.
>
> At the same time I checked the PSK31 IMD level across the spectrum using
the
> KK7UQ IMD meter. I observed no degradation of IMD resulting from the use
of
> minimum ALC to control the power to a flat level, compared to using DATA A
> mode where there is apparently no ALC feedback at all. Therefore it seems
to
> me that the solution that has apparently been adopted in DATA A mode for
the
> purpose of minimizing IMD is in fact producing no useful benefit at all,
> while at the same time depriving data users of a meaningful power control.
>
> I would much prefer the K3 to work the way other radios work, where you
can
> increase the drive level until the ALC just starts, and then you know that
> you are producing the requested power and no more. This is how I believe
it
> used to work in early versions of the firmware. DATA was just USB with a
> different input source option and compression automatically disabled.
>
> I will concede that the approach adopted by Elecraft is more foolproof in
> regard to avoiding IMD, but this is achieved at the cost of a loss of
> confidence in knowing the output power. However for me it is just too
> unsettling to not know how much power the radio is putting out,
particularly
> as I wish to operate remotely via the network and can't see for myself the
> power output. I have had to give this up for the last few months after I
> found myself transmitting nearly 100W when I was intending to use 40W.
>
> If the majority of other data mode users are happy with the K3 the way it
is
> and Elecraft can't or won't change it, then it's probably time for me to
> look for another radio.
>
> -
> Julian, G4ILO. K2 #392  K3 #222.
> http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html
G4ILO's
> Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3
> --
> View this message in context:
http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvements-to-AFSK-A%2C
-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2329434.html
> Sent from the Elecraft mailing list archive at Nabble.com.
>
>
>

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Re: [Elecraft] K3 Beta firmware rev. 2.82




Bob Cunnings wrote:
> 
> I'm not looking for another radio, as I've been doing what seems
> obvious (to me) - using USB mode for sound card digital operation, not
> DATA A. [snip]
> 

Yes, I can see the logic in that, which is what I had to do with the K2
before the v2 firmware was released. But I ordered the K3 mainly because it
promised to be a much superior radio than the K2 for data operation, so to
resort to such a workaround would seem like a major step backwards.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
-- 
View this message in context: 
http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvements-to-AFSK-A%2C-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2331384.html
Sent from the Elecraft mailing list archive at Nabble.com.

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[Elecraft] Feature request

2009-02-15 Thread Ken Kopp


Hi Mike,

When working split it would be nice to display your transmit frequency.

While in SPLIT mode, I see the TX frequency (VFO B) displayed
in the VFO B window, with a TX-labeled arrow pointing at B.

Say you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for
transmit.  While I see the TX arrow on B it would be nice to see that 
you
were actually transmitting on 305 on the main display.

While in SPLIT mode where else -could- you be transmitting?
Why would you need to be shown this information in a second
place at the same time?

In split mode could it be possible to display the 2nd VFO frequency and 
be
able to change the vfo with the sub/rit knob.  In split I can't recall 
ever
needing to use the rit feature.

You can change the VFO B frequency with the VFO B knob,
either by turning the knob and reading the resulting change in 
the
VFO B window or by tapping A/B to swap the VFO's to put
yourself on the frequency of the calling station.  I think this 
is
what you want to do.

SUB is a button and RIT is a knob.  I don't follow what you're
suggesting.  I agree, I've never had occasion to either RIT or 
XIT
in SPLIT ... or in any situation, for that matter ... but the 
results of
a change to either are displayed in the respective window if 
either
is enabled.  Actually, I -never- use either RIT or XIT, but 
that's
just a personal preference.

It would be nice to have immediate control over both vfo's if possible.

You do ... by turning each VFO's knob.

Heard you in a K5D pile-up today, BTW.  I operated from there
in the mid-90's ... a miserable place, too. (:-)

73! Ken Kopp - K0PP


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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread Joe Subich, W4TV



> So, neglecting the ~25 W vs 30 W error, it's clear that 
> something is keeping a tight rein on things in LSB, but 
> is not doing so in DATA-A.   
> Presumably, this is the ALC action, which we are told is 
> minimized in DATA-A mode.  

It looks like the ALC uses the wattmeter as an input in 
SSB but not in data mode.  I tried the same set of tests 
and found that the SSB power would increase (or decrease) 
over the course of 10 seconds or so to bring the power to 
the set point.  That same effect was not present in DATA. 

This would explain the differences between SSB and DATA 
and would - depending on the time constants in the ALC 
circuit - explain some of the IMD effects in SSB (and the 
recommendation against the use of amplifier ALC).  

Here are my power measurements in DATA and DATA-R modes. 
I have the 8-pole filters in both of my K3s but I have 
not checked the other one to see if there s any difference 
in "flatness" ... 

Set:  60   W 
Measured: 58.2 W (Tune)

   NOR  (USB) REV  (LSB)
---
 200   0.3 (-22.9)0.1 (-27.6)
 400  22.0  (-4.2)   15.2  (-5.8)
 600  46.4  (-1.0)   39.2  (-1.7)
 800  55.8  (-0.2)   50.5  (-0.6)
1000  57.0  (-0.1)   55.8  (-0.2)
1200  45.9  (-1.0)   49.0  (-0.7)
1400  43.8  (-1.2)   46.5  (-1.0)
1600  52.9  (-0.4)   50.8  (-0.6)
1800  64.5  ( 1.1)   61.5  ( 0.2)
2000  69.0  ( 1.2)   72.0  ( 0.9)
2200  59.0  ( 0.6)   68.2  ( 0.7)
2400  50.0  (-0.7)   63.0  ( 0.3)
2600  48.5  (-0.8)   64.9  ( 0.5) 
2800  15.4  (-5.8)   26.5  (-3.4)
3000   0.00.0

A sweep of the filter using K3FilterTools in the receive 
mode shows very close correlation with the USB power 
measurements including the broad peak at 1800-2000 Hz, 
the roughly 7 dB decline from peak to 2800 Hz and the 
2 dB slope between 500 and 2000 Hz.  The greater than 
expected roll off below 600 Hz is apparently due to the 
audio input response.






> -Original Message-
> From: Joe Planisky [mailto:jp...@jeffnet.org] 
> Sent: Saturday, February 14, 2009 7:46 PM
> To: li...@subich.com
> Cc: elecraft list
> Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
> 
> 
> Hi Joe,
> 
> > Further, single tone power calibration is only accurate for the 
> > specific frequency within the IF filter on which the calibration is 
> > performed.  If I calibrate power in CW mode that 
> calibration point is 
> > approximately 300 Hz from one "corner" of the 2.8 KHz 
> filter thanks to 
> > the way the K3 offsets the filters.
> 
> If I understand you correctly, you're essentially saying that 
> in DATA- 
> A (where, according to Elecraft, ALC action is intentionally 
> minimized  
> to minimize distortion), we're seeing more of the true shape of the  
> filter passband.  Whereas in a voice mode (USB or LSB, where ALC  
> action is more pronounced,) the ALC action will tend to make the  
> filter passband appear flat if the input is a single tone.
> 
> To test this, I used an audio signal generator to input single tones  
> of various frequencies into my K3 in both LSB and DATA-A 
> modes.  I set  
> the power control for 30W.  Here are my measurements:
> 
> AF input freq. Po-DATA-APo-LSB
> TUNE25.7 25.2
>  200 4.6  6.1
>  40027.0 24.8
>  60034.5 24.8
>  80045.6 24.8
> 100053.1 24.8
> 120047.5 24.8
> 140037.8 24.8
> 160032.3 24.8
> 180030.9 24.8
> 200031.9 24.8
> 220034.3 24.8
> 240037.9 24.8
> 260034.9 24.8
> 280013.9 24.8
> 3000 nil  nil
> 
> So, neglecting the ~25 W vs 30 W error, it's clear that something is  
> keeping a tight rein on things in LSB, but is not doing so in 
> DATA-A.   
> Presumably, this is the ALC action, which we are told is 
> minimized in  
> DATA-A mode.  The data also seem to corroborate your statement that  
> the calibration point is 300 Hz from the filter corner.
> 
> If I'm really wrong about something, please correct me.  If I'm NOT  
> wrong, I think I might finally understand why power output in DATA-A  
> doesn't seem to track the requested power closely.
> 
> 73
> --
> Joe KB8AP
> 
> On Feb 14, 2009, at 11:36 AM, Joe Subich, W4TV wrote:
> 
> >
> > You CAN NOT make those tests at 50 Watts!  The power calibration 
> > circuitry will be constantly changing the internal gain.  
> If the ATU 
> > is enabled and/or your dummy load is not flat the changes 
> invalidate 
> > the measurements.
> >
> > Further, single tone power calibration is only accurate for the 
> > specific frequency within the IF filter on which the calibration is 
> > performed.  If I calibrate power in CW mode that 
> calibration point is 
> > approximately 300 Hz from one "corner" of t

[Elecraft] Feature request

If there is a way to do this already please excuse the request.

Radio without 2nd receiver

When working split it would be nice to display your transmit frequency.  Say
you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for transmit.
While I see the TX arrow on B it would be nice to see that you were actually
transmitting on 305 on the main display.

In split mode could it be possible to display the 2nd VFO frequency and be
able to change the vfo with the sub/rit knob.  In split I can't recall ever
needing to use the rit feature.

It would be nice to have immediate control over both vfo's if possible.

Yaesu has a feature called quick split that put the radio in split mode up 5
or 10.  It was pretty handy.


I guess it has been a while since I had a radio that did not have a 2nd
receiver or at least a radio that could listen two places on the same band.

I have the 2nd receiver kit in the box.  It will be installed soon.  

Mike W0MU

"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin

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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread Bob Cunnings

I'm not looking for another radio, as I've been doing what seems
obvious (to me) - using USB mode for sound card digital operation, not
DATA A. Yes, I forgo the benefit of the management of compression
setting and mic selection that comes with using DATA A - but as things
stand now one must change TX EQ manually when switching back and forth
between SSB and data modes anyway, right? The compromise would be
greater if TX EQ settings become available on a per mode basis. Yes,
as you state the difference in quality of signal doesn't seem to be
significant, my PSK31 signal is uniformly reported as good when in USB
mode, just as in DATA A. I set input level for 4-5 bars ALC.

Yes, DATA A is a work in progress. Prior to firmware version 2.23 DATA
A power control seemed much like that of LSB/USB, but after that
version (which introduced the "LSB/USB TRANSMIT EQUALIZATION" change)
the behavior of DATA A and LSB/USB diverged. I've observed the DATA A
changes that have taken place since, and corresponded with K3 support
on this topic a couple of times as the firmware evolved. However, at
the moment I simply run with current firmware and use USB for data
modes. Yes, I have an external peak reading watt meter in line at all
times so I could use DATA A and tweak the power setting as I move
around in the waterfall, but it's convenient to be able to set (and
confirm) power once and forget it, as I can in CW.

Bob NW8L

On Sun, Feb 15, 2009 at 4:14 AM, Julian, G4ILO  wrote:

> If the majority of other data mode users are happy with the K3 the way it is
> and Elecraft can't or won't change it, then it's probably time for me to
> look for another radio.

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Re: [Elecraft] unlinking vfos

2009-02-15 Thread Bruce McLaughlin

OK.  I do thank you.  I never linked them before.  I must have held the
button too long when turning on the sub receiver/

Bruce-W8FU

-Original Message-
From: Doug Joyce [mailto:d_jo...@sympatico.ca] 
Sent: Sunday, February 15, 2009 12:43 AM
To: Bruce McLaughlin; elecraft@mailman.qth.net
Subject: Re: [Elecraft] unlinking vfos

Bruce:  Assuming that you have a Sub Receiver, see page 37 in the Owner's
Manual - Rev D1 under the section "Dedicated Sub Receiver Controls".
Holding "SUB" will link / unlink the VFOs.

73,

Doug,  VE3MV
K3/100 #2432

- Original Message - 
From: "Bruce McLaughlin" 
To: 
Sent: Sunday, February 15, 2009 12:15 AM
Subject: [Elecraft] unlinking vfos


> Somehow I managed to get my vfos linked in my K-3.  Can anyone tell me how
> to get them unlinked so that turning vfo A does not change vfo B?  I don't
> know how I managed to do that but I must have pressed the wrong button at
> the right time.  I haven't been able to find anything about it in the
> manual.
>
>
> Bruce-W8FU
>
> __
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>


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Re: [Elecraft] unlinking vfos

2009-02-15 Thread Bruce McLaughlin

Thanks, Joe.  Apparently I held the button too long when turning on the sub
receiver.  I learn something new each day about the radio!

Bruce-W8fu

-Original Message-
From: Joe Subich, W4TV [mailto:li...@subich.com] 
Sent: Sunday, February 15, 2009 12:39 AM
To: 'Bruce McLaughlin'; elecraft@mailman.qth.net
Subject: RE: [Elecraft] unlinking vfos



Hold Sub 


> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bruce 
> McLaughlin
> Sent: Sunday, February 15, 2009 12:15 AM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] unlinking vfos
> 
> 
> Somehow I managed to get my vfos linked in my K-3.  Can 
> anyone tell me how to get them unlinked so that turning vfo A 
> does not change vfo B?  I don't know how I managed to do that 
> but I must have pressed the wrong button at the right time.  
> I haven't been able to find anything about it in the manual.
> 
> 
> Bruce-W8FU
> 



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Re: [Elecraft] K3: audio drops at bandwidth .10 kHz

2009-02-15 Thread Windy Dankoff

YES!  Thanks for all the correct responses. This link from Stewart  
sums it up perfectly:

http://n2.nabble.com/K3-Narrow-CW-Filter-tp2258338p2258751.html


I had the RX EQ around my CW frequency set to +12. So, I reduced all  
settings in a linear manner, by 12. After changing Menu AF Gain range  
from LOW to HI, it sounds the same and the problem is solved.


73 de Windy
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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread Kok Chen

On Feb 15, 2009, at 2/158:58 AM, Guy Olinger, K2AV wrote:

> Taking the DATA A readings below at face value, the more than 2 db  
> bump
> around 1000 Hz is rather startling. I'm not sure what could cause  
> that, but
> at least to me that seems to be screaming for an explanation.   
> There's an
> old fireman's adage "never go past fire" to keep from being trapped  
> by fire
> closing around behind.

While I agree that a 2 dB bump is really, really bad for us guys who  
use frequency-agile digital transmission, this phenomenon is not  
restricted to just the K3.

The FT-1000MP has a similar 3 dB peak when you select PKT (i.e.,  
AFSK); and, like the K3, the rig is flat when using voice SSB  
modes.   In the case of the FT-1000MP, it appears to be a  
deliberately designed peaking -- the peak is "centered" near the AFSK  
tone pair that you have selected to use.

To see the FT-1000MP's variability, you can look at the following URL

http://homepage.mac.com/chen/w7ay/cocoaModem/UsersManual/ 
UsersManual.html#equalizer

Scroll below the two control panels and you will see the graphical  
display of the variability.  (In this program, you enter the measured  
power in that second column on the left, and the program splines the  
"curve" to produce the power correction that is applied to the  
transmitted signal when you "click on the waterfall.")

73
Chen, W7AY

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Re: [Elecraft] K3 Beta firmware rev. 2.82




Guy, K2AV wrote:
> 
> Taking the DATA A readings below at face value, the more than 2 db bump 
> around 1000 Hz is rather startling. I'm not sure what could cause that,
> but 
> at least to me that seems to be screaming for an explanation.  There's an 
> old fireman's adage "never go past fire" to keep from being trapped by
> fire 
> closing around behind.
> 
> Is there any point at discussing any more subtle issues until we know why 
> there's a 2 db bump in the middle of an expected flat DATA A bandpass? 
> Everything from test equipment to meters would be in play until ruled out.
> 

I'm glad you asked that because I've been thinking about the same question.
I have the 5-pole 2.7KHz filter and I observed the same peaks at 1000Hz and
2400Hz as Joe, who made those measurements. I guess he has the 5-pole filter
too. It would be extremely interesting if someone with an 8-pole filter
could run the same test and post the results to see whether there is less
variation across the passband.

I would not be overjoyed to have to splash $125 to solve the problem, but it
might be better than the alternatives.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
-- 
View this message in context: 
http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvements-to-AFSK-A%2C-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2330557.html
Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3 Beta firmware rev. 2.82




Richard Ferch wrote:
> 
> It seems as if part of the problem with the power control in DATA A mode
> may
> be that the power calibration appears to be done at an audio frequency
> which
> is sub-optimal for this mode. Ideally, the power calibration would be done
> at the point in the filter bandpass where the transmit filter's
> attenuation
> is least. 
> 

I agree, this would be an improvement.



> As it happens, there is another anomaly in DATA A which has some
> similarities to the above, although this may be coincidental. The SPOT
> button in other digital modes produces an audio tone at an optimal
> frequency
> (the selected mark tone in AFSK A and FSK D and the transmitted tone in
> PSK
> D), but in DATA A the SPOT button produces a tone at the CW sidetone
> pitch.
> The CW sidetone has nothing to do with DATA A mode, and it is far from the
> optimal point in the filter bandpass in DATA A. Just as it would be better
> to do power calibration at an optimal audio frequency, it would be better
> if
> the SPOT button produced an optimal tone. Good candidates for an optimal
> tone in DATA A would be either the current filter Fc or the default
> ("NORM")
> Fc for DATA A (1500 Hz).
> 

I suspect this might actually be a bug. The trouble with DATA A is that the
K3 doesn't know what center frequency the user is using (though it could
possibly guess from the filter SHIFT setting.) Personally I prefer 1KHz
because I like to hear what is going on and I find higher pitched tones
irritating.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
-- 
View this message in context: 
http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvements-to-AFSK-A%2C-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2330542.html
Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] Listen to both VFO A and B at the same time

2009-02-15 Thread Barry N1EU




W0MU Mike Fatchett wrote:
> 
> Is this possible without the 2nd receiver?
> 
No

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View this message in context: 
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Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread Guy Olinger, K2AV

Taking the DATA A readings below at face value, the more than 2 db bump 
around 1000 Hz is rather startling. I'm not sure what could cause that, but 
at least to me that seems to be screaming for an explanation.  There's an 
old fireman's adage "never go past fire" to keep from being trapped by fire 
closing around behind.

Is there any point at discussing any more subtle issues until we know why 
there's a 2 db bump in the middle of an expected flat DATA A bandpass? 
Everything from test equipment to meters would be in play until ruled out.

73, Guy.

- Original Message - 
From: "Joe Planisky" 
To: 
Cc: "elecraft list" 
Sent: Saturday, February 14, 2009 7:45 PM
Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82


> Hi Joe,
>
>> Further, single tone power calibration is only accurate for
>> the specific frequency within the IF filter on which the
>> calibration is performed.  If I calibrate power in CW mode
>> that calibration point is approximately 300 Hz from one
>> "corner" of the 2.8 KHz filter thanks to the way the K3
>> offsets the filters.
>
> If I understand you correctly, you're essentially saying that in DATA-
> A (where, according to Elecraft, ALC action is intentionally minimized
> to minimize distortion), we're seeing more of the true shape of the
> filter passband.  Whereas in a voice mode (USB or LSB, where ALC
> action is more pronounced,) the ALC action will tend to make the
> filter passband appear flat if the input is a single tone.
>
> To test this, I used an audio signal generator to input single tones
> of various frequencies into my K3 in both LSB and DATA-A modes.  I set
> the power control for 30W.  Here are my measurements:
>
> AF input freq. Po-DATA-APo-LSB
> TUNE25.7 25.2
>  200 4.6  6.1
>  40027.0 24.8
>  60034.5 24.8
>  80045.6 24.8
> 100053.1 24.8
> 120047.5 24.8
> 140037.8 24.8
> 160032.3 24.8
> 180030.9 24.8
> 200031.9 24.8
> 220034.3 24.8
> 240037.9 24.8
> 260034.9 24.8
> 280013.9 24.8
> 3000 nil  nil
>
> So, neglecting the ~25 W vs 30 W error, it's clear that something is
> keeping a tight rein on things in LSB, but is not doing so in DATA-A.
> Presumably, this is the ALC action, which we are told is minimized in
> DATA-A mode.  The data also seem to corroborate your statement that
> the calibration point is 300 Hz from the filter corner.
>
> If I'm really wrong about something, please correct me.  If I'm NOT
> wrong, I think I might finally understand why power output in DATA-A
> doesn't seem to track the requested power closely.
>
> 73
> --
> Joe KB8AP
>
> On Feb 14, 2009, at 11:36 AM, Joe Subich, W4TV wrote:
>
>>
>> You CAN NOT make those tests at 50 Watts!  The power calibration
>> circuitry will be constantly changing the internal gain.  If
>> the ATU is enabled and/or your dummy load is not flat the changes
>> invalidate the measurements.
>>
>> Further, single tone power calibration is only accurate for
>> the specific frequency within the IF filter on which the
>> calibration is performed.  If I calibrate power in CW mode
>> that calibration point is approximately 300 Hz from one
>> "corner" of the 2.8 KHz filter thanks to the way the K3
>> offsets the filters.  When I switch to DATA A, and try to
>> test the power level with a 1500 Hz tone, I can see 2 dB more
>> power simply because my 2.8 KHz filter has a 4 dB slope across
>> the passband and the K3 gain calculation includes compensation
>> for the loss at the calibration frequency.  If I check the
>> power with a 1 KHz tone, the difference may be 3 dB (DATA A
>> is USB, CW calibration is LSB so the slope changes direction
>> with tone).  If I switch to AFSK A (REV to stay with USB)
>> and check power with a 2295 Hz (USB Mark) tone, the difference
>> may be down to one dB or so.
>>
>> There are too many uncompensated variables to expect the K3
>> to maintain absolute control over the power output with
>> changing antennas, power levels, modes, (relative) frequency
>> within the IF passband and possibly even different filters.
>> ALC controls the audio level into, and the RF level out of
>> the DSP (modulator) process - it is an ALC (automatic LEVEL
>> control) NOT an APC (automatic POWER control).
>>
>> The ALC is an open loop system - the loop gain is calibrated
>> once at the 5 watt level and once at the 50 watt level for
>> one specific frequency in the IF passband.  Once that is
>> done, ALC simply controls the DSP gain.  If you change the
>> system gain following the DSP, the output power level WILL
>> CHANGE.  I'm sure it would be theoretically possible to
>> calibrate the system gain from 100 Hz to 2900 Hz offsets
>> from the carrier (for both the USB and LSB cases) and apply
>>

[Elecraft] Listen to both VFO A and B at the same time

Is this possible without the 2nd receiver?

"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin

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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread Richard Ferch

It seems as if part of the problem with the power control in DATA A mode may
be that the power calibration appears to be done at an audio frequency which
is sub-optimal for this mode. Ideally, the power calibration would be done
at the point in the filter bandpass where the transmit filter's attenuation
is least. If this were the case, the delivered power would be equal to the
requested power at the optimal frequency, and equal or less at other points
in the filter bandpass. Delivered powers exceeding the requested power would
not happen. Lower output powers would be possible, especially towards the
edges of the bandpass, but this is normal and happens with every radio, not
just the K3.

Performing power calibration at the transmit filter's optimal frequency
might be sub-optimal for CW, though, because of the way the filter bandpass
is adjusted during CW. If this is the case, perhaps there should be separate
power calibrations for CW and for data modes.

As it happens, there is another anomaly in DATA A which has some
similarities to the above, although this may be coincidental. The SPOT
button in other digital modes produces an audio tone at an optimal frequency
(the selected mark tone in AFSK A and FSK D and the transmitted tone in PSK
D), but in DATA A the SPOT button produces a tone at the CW sidetone pitch.
The CW sidetone has nothing to do with DATA A mode, and it is far from the
optimal point in the filter bandpass in DATA A. Just as it would be better
to do power calibration at an optimal audio frequency, it would be better if
the SPOT button produced an optimal tone. Good candidates for an optimal
tone in DATA A would be either the current filter Fc or the default ("NORM")
Fc for DATA A (1500 Hz).

73,
Rich VE3KI
K3 #1595

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Re: [Elecraft] K3 Transmitter gain

2009-02-15 Thread Ken Kopp

John,

I've loaded all versions of the firmware as they've become
available, and I only have the following observation / complaint ...

Up until the current, or maybe the next-to-last version, the 
output power of my K3 as displayed agreed with my several
Birds and was -well- within the 5 - 6% accuracy range of the 
Birds.  I've also made the dummy load / voltmeter / 'scope
measurements, with the same results.  (Please guys, I -do-
know the "traps" here, so no tutorials are needed.)  Yes,
I -do- know the difference would not be measurable on the
"other end", too. 

I've repeatedly run the calibration procedures and still see
a 10 to 15 watt disparity on all bands, including 6M, where
there's another Bird in that band's antenna line.  This is one 
of those "it worked fine, and now it doesn't" things and I hope 
it gets fixed soon.

So John, if power display accuracy is important to you, I'd
maybe not make the firmware upgrade.

73! Ken Kopp - K0PP
 elecraftcov...@rfwave.net

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Re: [Elecraft] K3 external qro keying line

2009-02-15 Thread David Cutter

Agreed.  It's good to bring out these things so we are aware of ALL the 
ramifications of doing things, you never know who's monitoring this channel.

There are some fast, small, non-vacuum relays that can be speeded up with a 
little circuitry.

73

David
G3UNA

- Original Message - 
From: "Don Wilhelm" 
To: "David Cutter" 
Cc: 
Sent: Sunday, February 15, 2009 1:37 PM
Subject: Re: [Elecraft] K3 external qro keying line


> David,
>
> The back emf pulse from a relay occurs when the coil circuit is opened, 
> and its polarity is opposite that used to operate the relay.  A properly 
> connected diode should 'swallow' the back emf, and a capacitor in parallel 
> with the coil should reduce the amplitude of the pulse.
> Any delay introduced by the diode and capacitor will be on the trailing 
> edge and will not  normally introduce significant delay on the leading 
> edge.
>
> Anyone adopting this scheme would not be operating QSK, so any additional 
> delays introduced will not be significant.
> Those desiring QSK operation should consider fast relays (vacuum relays) 
> or solid state switching devices for their amplifier switching.
>
> 73,
> Don W3FPR
>
>
> David Cutter wrote:
>> That's a good thought and provides instant isolation, but have some 
>> thought about the back emf off the coil - it could exceed the rating of 
>> the keying transistor.  I measured 800V on a very fast scope many years 
>> ago from a reed relay.  Just sticking a diode across the coil will slow 
>> it down a lot, so, some experimentation with zeners and resistors will 
>> get the situation optimised.  I once used a separate keying transistor 
>> and relay and found that a small cap from the base to the collector did 
>> the job quite well by slowing the off rise time, so the transistor 
>> absorbed a bit more power but gave good control.
>>
>> 73
>>
>> David
>> G3UNA
>>
>>
>> - Original Message - 
>> From: "Don Wilhelm" 
>> To: 
>> Sent: Thursday, February 12, 2009 4:00 PM
>> Subject: Re: [Elecraft] K3 external qro keying line
>>
>>
>>
>>> Terry,
>>>
>>> For those who prefer not to touch the K3 with a soldering iron, an
>>> external 12 volt relay is a good solution.  Obtain the power from the
>>> K3  12VDC OUT jack and use KEYOUT  to key the relay.  It accomplishes
>>> the same thing and retains the ability to use QSK in the future without
>>> 'undoing' the internal relay.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> w...@comcast.net wrote:
>>>
 I've seen numerous posts about the PTT output line on the K3 and using
 older amps. Yaesu's, Kenwood's, Icom's all share the same issue.



 Unless you are running QSK and need instant keying, I would suggest
 adding a small 12v relay inside the K3 that the solid state device
 keys and presents the user with a set of dry, isolated contacts that
 can handle positive, negative and up to 250v DC or AC. I have added
 this to several K3's to protect the switching transistor from eventual
 destruction. Once again, if you are using QSK, solid state due to it's
 fast switching time is your only option.



 Yes, it means touching your K3 with a hot soldering iron, but it's a
 "pay me now or pay me later" thing, sooner or later it will blow the
 switch if you are hooking up older or HB amps that use other than low
 current positive keying voltages.



 Terry



>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 
>> 270.10.23/1953 - Release Date: 02/14/09 18:01:00
>>
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Re: [Elecraft] K3/100 Assembly - Initial test & Cals

2009-02-15 Thread Dick Dievendorff

If it were me, I'd follow the assembly instructions as closely as I could.
If the assembly instructions said "install latest firmware at this point"
I'd do that. 

 

The calibration procedures that were the most time-consuming and error-prone
are now automated.  Synthesizer cal was always done by the K3 internally,
and the Tx Gain calibration can be done with an assist from the K3 Utility
(it's on the Config tab).

 

But I think it would be fine if you updated firmware before calibration,
too.

 

Dick, K6KR

 

 

From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Walter V. Gilles
Sent: Saturday, February 14, 2009 9:33 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3/100 Assembly - Initial test & Cals

 


Greetings,

 

I am just starting the initial test and cals portion of assembly, prior KNB3
enable and KPA3 installation.  Power-up went fine with no errors.  Before I
start with Synthesizer Cal and move on, is now a good time to update the
firmware to latest release, then do all the cals?  I'm guessing so, but
confirmation appreciated.  Thanks much.

 

Walter, N0DZJ

 

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[Elecraft] K3 Feature Request - TEXT DEC

2009-02-15 Thread John Huffman

I like the CW text decode feature, but only use it on my transmissions 
(TX ONLY) to see how my sending is doing.  I like that when using TX 
ONLY the AGC doesn't go to AGC-S.  I don't like that the display keeps 
switching back to VFO B between words.  Very distracting.

If set to CW 5--40, the display momentarily goes to VFO B before going 
into receive decode mode.

Request -  In text decode mode TX ONLY, delay showing VFO B for 3 
seconds.  In text decode mode CW 5--40, omit showing VFO B after each 
transmitted word.

Thanks for listening,
73 de K1ESE
John
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Re: [Elecraft] MH2 mic for sale

2009-02-15 Thread SidShusterman


Thanks to all. The mic is sold.

SidShusterman wrote:

Brand new! Never used.  $40 includes shipping CONUS. Paypal no fee.
Reply directly to me please.
73,
Sid

 




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No virus found in this incoming message.
Checked by AVG. 
Version: 7.5.552 / Virus Database: 270.10.23/1950 - Release Date: 2/12/2009 6:46 PM
  
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Re: [Elecraft] K3 Beta firmware rev. 2.82

2009-02-15 Thread David Lankshear

 Ah!  I must have been on an exact 5W setting when I did it, then, Joe.
Thanks for clearing that up.

I still think that as it's a calibration feature, it would make better sense
by being protected by the ability to turn it off.  I'd really like to hear
why a calibration feature sits there awaiting to pounce on the unwary.

73  DaveL  G3TJP


I said:
> So, if I'm tuning up through, say, a Z-Match into a doublet
> and power output is set to "around" 5 or 50W and press "Tune"
> in order to tweak the Z-Match, the initial (off-tune) complex
> impedance the K3 may see could very well cause the K3's output
> power to change to 5 or 50W and because of that, power ..

Joe replied:
Not quite ... If you set the power level to exactly 5.0 or 50
watts and press the Tune button the K3 will recalibrate.  If
you set the power to 4.9, 5.1, 49 or 51 watts it will not
recalibrate.
 


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Re: [Elecraft] K3 external qro keying line

David,

The back emf pulse from a relay occurs when the coil circuit is opened, 
and its polarity is opposite that used to operate the relay.  A properly 
connected diode should 'swallow' the back emf, and a capacitor in 
parallel with the coil should reduce the amplitude of the pulse.
Any delay introduced by the diode and capacitor will be on the trailing 
edge and will not  normally introduce significant delay on the leading edge.

Anyone adopting this scheme would not be operating QSK, so any 
additional delays introduced will not be significant.
Those desiring QSK operation should consider fast relays (vacuum relays) 
or solid state switching devices for their amplifier switching.

73,
Don W3FPR
 

David Cutter wrote:
> That's a good thought and provides instant isolation, but have some thought 
> about the back emf off the coil - it could exceed the rating of the keying 
> transistor.  I measured 800V on a very fast scope many years ago from a reed 
> relay.  Just sticking a diode across the coil will slow it down a lot, so, 
> some experimentation with zeners and resistors will get the situation 
> optimised.  I once used a separate keying transistor and relay and found 
> that a small cap from the base to the collector did the job quite well by 
> slowing the off rise time, so the transistor absorbed a bit more power but 
> gave good control.
>
> 73
>
> David
> G3UNA
>
>
> - Original Message - 
> From: "Don Wilhelm" 
> To: 
> Sent: Thursday, February 12, 2009 4:00 PM
> Subject: Re: [Elecraft] K3 external qro keying line
>
>
>   
>> Terry,
>>
>> For those who prefer not to touch the K3 with a soldering iron, an
>> external 12 volt relay is a good solution.  Obtain the power from the
>> K3  12VDC OUT jack and use KEYOUT  to key the relay.  It accomplishes
>> the same thing and retains the ability to use QSK in the future without
>> 'undoing' the internal relay.
>>
>> 73,
>> Don W3FPR
>>
>> w...@comcast.net wrote:
>> 
>>> I've seen numerous posts about the PTT output line on the K3 and using
>>> older amps. Yaesu's, Kenwood's, Icom's all share the same issue.
>>>
>>>
>>>
>>> Unless you are running QSK and need instant keying, I would suggest
>>> adding a small 12v relay inside the K3 that the solid state device
>>> keys and presents the user with a set of dry, isolated contacts that
>>> can handle positive, negative and up to 250v DC or AC. I have added
>>> this to several K3's to protect the switching transistor from eventual
>>> destruction. Once again, if you are using QSK, solid state due to it's
>>> fast switching time is your only option.
>>>
>>>
>>>
>>> Yes, it means touching your K3 with a hot soldering iron, but it's a
>>> "pay me now or pay me later" thing, sooner or later it will blow the
>>> switch if you are hooking up older or HB amps that use other than low
>>> current positive keying voltages.
>>>
>>>
>>>
>>> Terry
>>>
>>>
>>>   
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>> 
>
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>
>
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> Checked by AVG - www.avg.com 
> Version: 8.0.237 / Virus Database: 270.10.23/1953 - Release Date: 02/14/09 
> 18:01:00
>
>   
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[Elecraft] UK Elecraft net report for Sunday 15th February

2009-02-15 Thread Dave G4AON

This week we had a little QRM with some stations struggling to hear
those running at the 10 Watt power level.

Subject matter was as always quite interesting in no particular order:

USB to serial adapters.

K3 2.82 firmware and "peaky" results on SSB, one net member was using
the built-in 6 dB attenuator in his Acom 1000 in order to be able to run
his K3 at 100W. I have reverted to 2.38 firmware in order to avoid the
poor ALC control in later versions although this can be a problem with
some 3rd party control programs and is also an issue for those with the
voice recorder and possibly those with the 2nd receiver.

Source of Altoids tins to build Softrock panoramic adapters into (my
village newsagent stocks them, supermarkets apparently don't).

Whether it is necessary to use a buffer amplifier with a Softrock IF and
the K3.

Adding an IF output to a K3 without having to purchase the KXV3 (see the
KXV3 installation instructions and circuit, you will see there is only a
cable and BNC socket required).

Microphone ground modifications and how good the low cost Kenwood MC-43S
microphone sounds on a K3. Several net members were either using that
microphone or were swapping to one for a demonstration.

The net was recorded by Dave, GM4EVS. A 15 MB MP3 file of the net can be
downloaded from http://www.t9cw.com/k3net/

Stations this week were:

G0VGS, Ian
G4DQP, Vince
G0MJW, Mike
M3WCK, Colin
GM0ELP, Doug
M1PAF, Paul
M1KAZ, Andrew

73 until next week
Dave, G4AON
K3/100 #80, Acom 1000, dipole






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Re: [Elecraft] K3 external qro keying line

2009-02-15 Thread David Cutter

That's a good thought and provides instant isolation, but have some thought 
about the back emf off the coil - it could exceed the rating of the keying 
transistor.  I measured 800V on a very fast scope many years ago from a reed 
relay.  Just sticking a diode across the coil will slow it down a lot, so, 
some experimentation with zeners and resistors will get the situation 
optimised.  I once used a separate keying transistor and relay and found 
that a small cap from the base to the collector did the job quite well by 
slowing the off rise time, so the transistor absorbed a bit more power but 
gave good control.

73

David
G3UNA


- Original Message - 
From: "Don Wilhelm" 
To: 
Sent: Thursday, February 12, 2009 4:00 PM
Subject: Re: [Elecraft] K3 external qro keying line


> Terry,
>
> For those who prefer not to touch the K3 with a soldering iron, an
> external 12 volt relay is a good solution.  Obtain the power from the
> K3  12VDC OUT jack and use KEYOUT  to key the relay.  It accomplishes
> the same thing and retains the ability to use QSK in the future without
> 'undoing' the internal relay.
>
> 73,
> Don W3FPR
>
> w...@comcast.net wrote:
>>
>> I've seen numerous posts about the PTT output line on the K3 and using
>> older amps. Yaesu's, Kenwood's, Icom's all share the same issue.
>>
>>
>>
>> Unless you are running QSK and need instant keying, I would suggest
>> adding a small 12v relay inside the K3 that the solid state device
>> keys and presents the user with a set of dry, isolated contacts that
>> can handle positive, negative and up to 250v DC or AC. I have added
>> this to several K3's to protect the switching transistor from eventual
>> destruction. Once again, if you are using QSK, solid state due to it's
>> fast switching time is your only option.
>>
>>
>>
>> Yes, it means touching your K3 with a hot soldering iron, but it's a
>> "pay me now or pay me later" thing, sooner or later it will blow the
>> switch if you are hooking up older or HB amps that use other than low
>> current positive keying voltages.
>>
>>
>>
>> Terry
>>
>>
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Re: [Elecraft] K3: send RTTY using KEY IN?

2009-02-15 Thread Robert Naumann

While such a capability would be nice to have in an emergency, there are
much better tools to allow one to operate RTTY... like MMTTY which is free
to download.

I would suggest a review of AA5AU's excellent RTTY tutorial web site for
details:  http://www.aa5au.com/rtty.html

73,

Bob W5OV 
(NJ5DX in WPX RTTY)

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Julian, G4ILO
Sent: Sunday, February 15, 2009 7:00 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3: send RTTY using KEY IN?




Val-12 wrote:
> 
> Julian, the paddle generates only dots and dashes, so the decoding is 
> necessary anyway. But this is not a problem, after K3 has decoding 
> capability.
> 
Yes, but it can quickly work out what the character is from the dots and
dashes. With hand-sent morse it has to figure out what is a dot and what is
a dash. This is the hard part, the reason why decoders don't work so well on
hand sent morse.

Yes, the K3 has decoding capability that works on audio from the receiver.
Wiring that up (or the software equivalent) so it works from input from the
key socket as well is not as trivial as it may seem to someone who is not
the rig designer.

Believe me. I asked pretty much the same question a while ago when I
wondered why the K3 decoder could not display the code I was sending from
the straight key, as it does with the paddle, and that was what I was told.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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View this message in context:
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Re: [Elecraft] K3: send RTTY using KEY IN?

Val-12 wrote:
> 
> Julian, the paddle generates only dots and dashes, so the decoding is 
> necessary anyway. But this is not a problem, after K3 has decoding 
> capability.
> 
Yes, but it can quickly work out what the character is from the dots and
dashes. With hand-sent morse it has to figure out what is a dot and what is
a dash. This is the hard part, the reason why decoders don't work so well on
hand sent morse.

Yes, the K3 has decoding capability that works on audio from the receiver.
Wiring that up (or the software equivalent) so it works from input from the
key socket as well is not as trivial as it may seem to someone who is not
the rig designer.

Believe me. I asked pretty much the same question a while ago when I
wondered why the K3 decoder could not display the code I was sending from
the straight key, as it does with the paddle, and that was what I was told.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3 external ALC to phono

James,

The answer is yes. However, until recently the K3 did not use the 
negative going ALC like is provided by most amplifiers. Be certain your 
K3 contains the External ALC mod if you are using an amplifier that 
provided negative going ALC.

By the way -- Elecraft strongly recommends that external ALC *not* be 
used to control the amplifier power level because it produces excessive 
IMD products.

73,
Don W3FPR

James Sarte wrote:
>
> Dear group,
>
> If I wanted to make an external ALC cable for use with a linear, do I 
> just need to solder pin 15 to phono center, and pin 12 to the screen 
> beneath the phono cable’s sheath for common?
>
> 73,
>
> James KC2UEE
>
>
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Re: [Elecraft] K3/100 Assembly - Initial test & Cals

2009-02-15 Thread Doug Joyce

Walter- I'd go ahead and use the firmware that the unit was shipped with to do 
all the calibration following the build.  You can always do an update after and 
it is very easy using the instructions on the web site and the K3 utility.

I built mine in early Jan and have done 4 upgrades without a hitch.

73

Doug,  VE3MV
K3/100 S/N 2432
  - Original Message -
  From: Walter V. Gilles
  To: elecraft@mailman.qth.net
  Sent: Sunday, February 15, 2009 12:32 AM
  Subject: [Elecraft] K3/100 Assembly - Initial test & Cals


Greetings,

I am just starting the initial test and cals portion of assembly, prior 
KNB3 enable and KPA3 installation.  Power-up went fine with no errors.  Before 
I start with Synthesizer Cal and move on, is now a good time to update the 
firmware to latest release, then do all the cals?  I'm guessing so, but 
confirmation appreciated.  Thanks much.

Walter, N0DZJ




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Re: [Elecraft] K3: send RTTY using KEY IN?

2009-02-15 Thread Val

> It was never implemented and I doubt if it has ever been "on the list". In
> order for this to work, the K3 would have to decode your manual sending.
> When sending with a paddle, it generates the text itself from paddle
> closures so no decoding is necessary.
>
> -
> Julian, G4ILO. K2 #392  K3 #222.

Julian, the paddle generates only dots and dashes, so the decoding is 
necessary anyway. But this is not a problem, after K3 has decoding 
capability.

73 Val, LZ1VB 

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Re: [Elecraft] K3 Beta firmware rev. 2.82

I have just run a set of tests across a range of audio frequencies as did
Joe, KB8AP. The results were almost identical, so I am not going to tabulate
them here. In SSB I adjusted the input level to give sufficient drive and
just enough ALC action to result in a flat output from 600Hz to 2600Hz.

At the same time I checked the PSK31 IMD level across the spectrum using the
KK7UQ IMD meter. I observed no degradation of IMD resulting from the use of
minimum ALC to control the power to a flat level, compared to using DATA A
mode where there is apparently no ALC feedback at all. Therefore it seems to
me that the solution that has apparently been adopted in DATA A mode for the
purpose of minimizing IMD is in fact producing no useful benefit at all,
while at the same time depriving data users of a meaningful power control.

I would much prefer the K3 to work the way other radios work, where you can
increase the drive level until the ALC just starts, and then you know that
you are producing the requested power and no more. This is how I believe it
used to work in early versions of the firmware. DATA was just USB with a
different input source option and compression automatically disabled.

I will concede that the approach adopted by Elecraft is more foolproof in
regard to avoiding IMD, but this is achieved at the cost of a loss of
confidence in knowing the output power. However for me it is just too
unsettling to not know how much power the radio is putting out, particularly
as I wish to operate remotely via the network and can't see for myself the
power output. I have had to give this up for the last few months after I
found myself transmitting nearly 100W when I was intending to use 40W.

If the majority of other data mode users are happy with the K3 the way it is
and Elecraft can't or won't change it, then it's probably time for me to
look for another radio.

-
Julian, G4ILO. K2 #392 K3 #222.
http://www.g4ilo.com/ G4ILO's Shack http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3
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Re: [Elecraft] K3: send RTTY using KEY IN?




DOUGLAS ZWIEBEL wrote:
> 
> OK...so we can send RTTY using the paddle in.  What about sending RTTY
> using the KEY IN (as in, use an outboard contest program to send CW
> and have the K3 convert it to RY).
> 
> I know that this was supposed to be "on the list" but was this ever
> implemented?
> 
> 
It was never implemented and I doubt if it has ever been "on the list". In
order for this to work, the K3 would have to decode your manual sending.
When sending with a paddle, it generates the text itself from paddle
closures so no decoding is necessary.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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Re: [Elecraft] K3 Transmitter gain




John Lemay wrote:
> 
> Hello all
> 
> It's several months since I assembled my K3. There have been half a dozen
> software revisions in that time, all of which I have loaded. Some of the
> revisions have been aimed at improving power control.
> 
> Should I run through the TX gain calibration process again to get the most
> benefit from the revised software ?
> 
> 
I run the TX gain calibration process as a matter of principle after
installing any firmware update. It can't do any harm and it may - due to
internal changes within the firmware - make a difference. If you use the
wizard in the latest Elecraft Utility it takes next to no time.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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Re: [Elecraft] K3 Beta firmware rev. 2.82




Joe Planisky wrote:
> 
> 
> To test this, I used an audio signal generator to input single tones  
> of various frequencies into my K3 in both LSB and DATA-A modes.  I set  
> the power control for 30W.  Here are my measurements:
> 
> AF input freq. Po-DATA-APo-LSB
> TUNE25.7 25.2
>   200 4.6  6.1
>   40027.0 24.8
>   60034.5 24.8
>   80045.6 24.8
> 100053.1 24.8
> 120047.5 24.8
> 140037.8 24.8
> 160032.3 24.8
> 180030.9 24.8
> 200031.9 24.8
> 220034.3 24.8
> 240037.9 24.8
> 260034.9 24.8
> 280013.9 24.8
> 3000 nil  nil
> 
> So, neglecting the ~25 W vs 30 W error, it's clear that something is  
> keeping a tight rein on things in LSB, but is not doing so in DATA-A.   
> Presumably, this is the ALC action, which we are told is minimized in  
> DATA-A mode.  The data also seem to corroborate your statement that  
> the calibration point is 300 Hz from the filter corner.
> 
> 

That amount of variability is alarming. I'm really not happy with it. But to
me, that's not a 25W vs 30W error, it's a 30W vs 53W error. Because the
output at 1KHz, which is the center frequency I use for PSK31, is 53W when
30W is requested. This is exactly what I am complaining about.

If the power output at 1KHz matched the power level requested then I would
be a lot happier, though it is quite disappointing to see that the power
would be little more than half that level over most of the range that a
Digipan user would operate in.

-
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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Re: [Elecraft] K3 Beta firmware rev. 2.82