Re: [Elecraft] new firmware release

[Gary Gregory]

Hmmm, not sure why you need to switch off twice, once IS required as noted
in the K3 Manual and that has been the case with mine from day one.

Never had a FW download failure...yep, I got'em crossed now folks...:-)

73's
Gary

On Sun, Dec 12, 2010 at 10:07 AM, wf4o  wrote:

>
> Thanks,I haven't heard that before, but I will certainly do this from now
> on. It does seem to involve the MCU module etc. Thanks again.
> On Dec 11, 2010, at 4:00 PM, G4LNA [via Elecraft] wrote:
>
> > I used to get problems when I used to download the firmware and used the
> rig straight away and I found that if I switched the rig on and off twice in
> a row it functions perfectly after that, so I follow that procedure every
> time I load the firmware now and never get a problem.
> >
> > View message @
> http://elecraft.365791.n2.nabble.com/new-firmware-release-tp5813395p5826846.html
> > To unsubscribe from new firmware release, click here.
>
>
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/new-firmware-release-tp5813395p5827141.html
> Sent from the [K3] mailing list archive at Nabble.com.
> __
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-- 
Gary
VK4FD - Motorhome Mobile
http://www.qsl.net/vk4fd/
K3 #679, P3 #546
For everything else there's Mastercard!!!
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Re: [Elecraft] [K3] Yamaha CM500 and ANTIVOX setting

[Igor Kosvin]

I also recently replaced the Heil Proset for CM500, not because of hearing
issues but better comfort in the long contests. I am not a big fan of vox, I
use a foot pedal to PTT the rig. I turned on the vox just to see if I have
same problem as you with CM500. I currently use front panel microphone
connector with homebrew adaptor and I also currently don't use the K3 bias
for the microphone, I still use the AAA battery pack that came with the
headset for the bias. I played with the vox settings so the levels will be
right and sensitivity of vox is correct. It is not difficult to do because
the CM500 microphone is highly directional. Here are my settings at this
point:
MIC is 30
CMP is 20
In the Main menu:
VOX GN is 010
ANTIVOX is 025

With these settings the vox works as it should. Knocking on the desk,
dropping pen on the desk or normal breathing do not trip the vox. I don't
know how loud are the signals you are hearing, my AF gain is at about 9
o'clock position to hear normal signals on 10m. The headset is closing the
ears pretty tight, hard to believe that audio from the headphones is able to
trip the vox.

73,
Igor, N1YX

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike K2MK
Sent: Saturday, December 11, 2010 7:57 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Yamaha CM500 and ANTIVOX setting


I decided to try the CM500 headset in place of the Elecraft Heil Proset
headset. I'm always on a quest for increased volume due to age related
decreased hearing. To that end I can emphatically say that the CM500 solves
my low audio level problem. The CM500 in the rear headphone jack provides
greater audio output then the Proset in the rear speaker jack. So far, so
good.

I tried the CM500 on SSB today in the 10 meter contest and had occasional
VOX tripping when listening to loud signals or loud noise. I'm using the
headphones and there is no speaker output. (I even held my breath to be sure
my breathing wasn't tripping the VOX). I reduced the VOX GAIN to 17. Any
lower and I couldn't always trip it reliably. My ANTIVOX was set at 20 for
the Proset so I began to crank it up. It's up to 80 now for the CM500 and
appears to have solved the problem. 

My other settings are:
RP.L BIAS
MIC GAIN = 10 for 5 to 7 ALC bars
Comp = 20 for 10db CMP

Has anyone else experienced this problem?

73,
Mike K2MK
-- 
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199p5827199.html
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Re: [Elecraft] K3 PA IO TST Problem

[David Christ]

That was it.  I had tried it a second time per installation 
instructions.  Tried a third time and there it went.  Now I can 
continue the installation.  There is another small mystery which can 
be solved later.  When I go to fan 1 the fans jerk once but don't 
spin.  Going to 2 3 and 4 they spin fine.  If I go to e and then to 1 
they continue to spin.  Also if I start at 1 and flick the blades 
with my finger they run fine.  Ill have to get out my VOM and check 
the supply voltage.

Makes me think of that cell phone ad.  With Elecraft you are getting 
thousands of support people.

David K0LUM

At 5:57 PM -0800 12/11/10, Gary wrote:
>David,
>In my experience failure of the PAIO test on the first try is normal and is
>usually corrected by cycling power. If you haven't already try the test
>procedure again after cycling power to the K3 using its POWER switch. If the
>test fails on the second try then cycle power again and try a third time. If
>the test still fails then there is definitely a problem. Good luck.
>Gary
>
>-Original Message-
>From: elecraft-boun...@mailman.qth.net
>[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Christ
>Sent: Saturday, December 11, 2010 4:09 PM
>To: Elecraft@mailman.qth.net
>Subject: [Elecraft] K3 PA IO TST Problem
>
>Bad 24 hours.  Last night we hit a deer.  Tonight while installing a
>KPA3 in my K3 it fails the PAIO tst.  No relay click. No fan action.
>Can't contact Elecraft until Monday.
>
>Any suggestions to try over the weekend would be appreciated.
>
>David K0LUM
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Re: [Elecraft] XG2 Frequency Accuracy

[David Gilbert]

Yeah, I understand that.  I was just wondering how close they might be 
since I don't have a clue what the tolerance is of the crystals used by 
Elecraft.  Specifically, I was wondering if they would be close enough 
(typically) to use for in-band IMD tests as a function of AGC settings.  
Or at least close enough that whichever one was higher in frequency 
could be easily padded down to within a few tens of Hz or so of the other.

73,
Dave   AB7E



On 12/11/2010 7:22 PM, Don Wilhelm wrote:
>  Dave,
>
> The frequency accuracy of the XG2 will vary with the individual 
> crystals.  It is not specifically for frequency accuracy, but for 
> level accuracy.
>
> In other words, I would not depend on the XG2 for any sort of 
> frequency calibration unless you measured the output of a particular 
> one with a calibrated frequency meter.
>
> 73,
> Don W3FPR
>
> On 12/11/2010 9:00 PM, David Gilbert wrote:
>> Does anyone know the typical frequency accuracy of the XG2?  If I had
>> two XG2's, what would be the typical separation in frequency between the
>> two of them at the 14060 setting?
>>
>>
>
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[Elecraft] [Net] Elecraft CW Net Announcement

[Kevin Rock]

Good Evening,
It is raining.  It has been raining.  It will be raining.  I feel like  
I am conjugating a verb :)  The weather has gone from cold to medium.   
Soon it will be 50 degrees or better; but with rain.  Looks like my spate  
of winter has passed.  But the calendar has yet to say winter so I await  
more snow.
Propagation on twenty meters has been rather good while forty meters  
has been less than satisfactory.  I am unsure why forty meters has been so  
abysmal but maybe it is due for a change.

Please join us tomorrow afternoon and evening.

1) Hail signs  (first letter or two of the suffix of your call)
2) NCS help  (as well as QSP/QNP  help)

Sunday 2300z (Sunday 3 PM PST) 14050 kHz
Monday 0100z (Sunday 5 PM PST)  7045 kHz

  Stay well,
 Kevin.  KD5ONS

-
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[Elecraft] An AGC Story

[Bob Henderson]

Bottom posted for context.

Geoff GM4ESD wrote

"If I had a K3, before I changed the HAGC threshold my *first*
measurement would be to look at the output of the SA612 mixer (with a
spectrum analyser) while introducing two or more very close spaced
signals into the antenna port, so that these signals do get through
the roofer - as in a pileup.  The objective, of course, would be to
obtain an acceptably clean output from the mixer with non intrusive
products over a wide range of input levels.  IMHO the higher the
HAGC's threshold can be the better, provided its control is tight
enough when activated to protect all what follows."


I made within DSP b/w IMD measurements on my K3 and comparable
measurements on my K2. These were included in a post dated 5 December
but you may have missed it.

The following measurements relate to K3 S/N 4904 on 7MHz with 2.7kHz
roofing filter and 2.7kHz DSP b/w.  Default slow AGC was selected.
The table shows input level at the K3 antenna connector for
each of two carriers spaced 500Hz.  At each input level, the level of
the strongest IMD product observed at the AF output using an HP8568B is recorded
alongside.

-73dBm  Better than -55dBc  (Input S9)
-63dBm  -55dBc
-53dBm  -50dBc
-42dBm  -45dBc
-33dBm  -42dBc
-23dBm  -37dBc  (Input S9+50)

These figures are good and IMHO entirely acceptable.  Some older
transceivers would struggle to provide -35dBc at S9.

I made a similar set of measurements with my old K2 S/N 997

-73dBm  -50dBc
-63dBm  -48dBc
-53dBm  -45dBc
-43dBm  -48dBc
-33dBm  -45dBc
-23dBm  -15dBc

Broadly speaking the K3 is as good or better than the K2, which is
itself good. It is possible later mods to the K2 may have made it even
better.  The most recent mods to my K2 were carried out over 5 years ago.

73 Bob, 5B4AGN
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[Elecraft] [QRO] Re: KPA 500

[W5UXH]

I would be interested in knowing if the KPA-500 will work QRQ / QSK (to at
least 70 wpm) with the K3 in CW+ mode, where the KEY OUT to RF out timing is
fixed at approximately 4 to 5 msecs?  Also, does the KPA-500 QSK use all
solid state switching (no relays)?  Anyone have any information on these
details?

Chuck, W5UXH


wayne burdick wrote:
> 
> 
> We're shooting for February. The amps are working beautifully, but we  
> need to ramp up for production, and some parts have longer lead times.  
> We'll be announcing pricing, etc., well before then.
> 
> 73,
> Wayne
> N6KR
> 
> 
> 
> 
> 

-- 
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Re: [Elecraft] XG2 Frequency Accuracy

[Don Wilhelm]

  Dave,

The frequency accuracy of the XG2 will vary with the individual 
crystals.  It is not specifically for frequency accuracy, but for level 
accuracy.

In other words, I would not depend on the XG2 for any sort of frequency 
calibration unless you measured the output of a particular one with a 
calibrated frequency meter.

73,
Don W3FPR

On 12/11/2010 9:00 PM, David Gilbert wrote:
> Does anyone know the typical frequency accuracy of the XG2?  If I had
> two XG2's, what would be the typical separation in frequency between the
> two of them at the 14060 setting?
>
>
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[Elecraft] XG2 Frequency Accuracy

[David Gilbert]

Does anyone know the typical frequency accuracy of the XG2?  If I had 
two XG2's, what would be the typical separation in frequency between the 
two of them at the 14060 setting?

Thanks,
Dave   AB7E


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Re: [Elecraft] K3 PA IO TST Problem

[David Christ]

I posted it here just in case there was something 
obvious I overlooked.  I am too busy this weekend 
to do much more with it.  My intention is to call 
on Monday.

Thanks all.

David K0LUM

At 9:26 AM +0800 12/12/10, Johnny Siu wrote:
>Hi David,
>
>Well, I think it is now the time to send your 
>email to supp...@elecraft.com for assistance.
>
>They know the KPA3 inside out.
>
>
>cheers,
>
>Johnny VR2XMC
>
>
>--- 2010îN12åé12ì™ êØä™ì™ÅCDavid Christ  õçì¼:
>
>>  äÒåèêl: David Christ 
>>  éÂëË: Re: [Elecraft] K3 PA IO TST Problem
>>  ùæåèêl: "Johnny Siu" , Elecraft@mailman.qth.net
>>  ì™ä™: 2010îN12åé12ì™,êØä™ì™,è“åþ9:01
>>  This is during upgrading a K3/10 to a
>>  K3/100.
>>  The PAIO test is done before the PA3 is
>>  installed.  And yes I made sure the red wire was
>>  on the pin with the silk screened word red behind
>>  it.
>>
>>  I haven't taken time to study the schematics yet or take
>>  voltage readings.
>>
>>  David K0LUM
>>
>>
>>  At 8:16 AM +0800 12/12/10, Johnny Siu wrote:
>>  >Hello David,
>>  >
>>  >Could you take out the KPA3 module and just
>>  >leave the PAIO board?  Do the test again so that
>>  >we can determine whether the problem is solely
>>  >coming from the PAIO board.
>>  >
>>  >The PAIO board can work without the power module
>>  >and the K3 can function in QRP mode?
>>  >
>>  >BTW, do you install the fans connector in the
>>  >correct way (beware of the position of the red
>>  >wires)?
>>  >
>>  >
>>  >cheers,
>>  >
>>  >Johnny VR2XMC
>>  >
>>  >--- 2010îN12åé12ì êØäìÅCDavid Christ
>>  
>>  õçì1Ž4:
>>  >
>>  >
>>  >  > Bad 24 hours.  Last night we hit
>>  >>  a deer.  Tonight while installing a
>>  >>  KPA3 in my K3 it fails the PAIO tst. 
>>  No relay click.
>>  >>  No fan action.
>>  >>  Can't contact Elecraft until Monday.
>>  >>
>>  >>  Any suggestions to try over the weekend
>>  would be
>>  >>  appreciated.
>>  >>
>>  >>  David K0LUM
>>  >> 
>>  __
>>  >>  Elecraft mailing list
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>>  >>  Help: http://mailman.qth.net/mmfaq.htm
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>>  >>
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>>  >>
>>
>>

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[Elecraft] AGC story

[eric manning]

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[Elecraft] [K2] Microphonic 18.157.9 (+/-) ?

[Eugene Balinski]

Hi All,

  I ran across an interesting thing with my K2.  I have a
very pronounced microphonic at 18.157.9.  There is a
carrier (birdie?) on that frequency and when I tap on the
top of the radio, the tapping is clearly audible in the
speaker.   

  Has anyone else noticed this ?

Thanks in advance,

Gene K1NR

K2 6K
-
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Re: [Elecraft] Yamaha CM500 and ANTIVOX setting

[Jim Brown]

On 12/11/2010 4:56 PM, Mike K2MK wrote:
> My ANTIVOX was set at 20 for
> the Proset so I began to crank it up. It's up to 80 now for the CM500 and
> appears to have solved the problem.

The mic in the CM500 is a VERY hot mic -- that is, a lot of level. You 
may need to reduce both mic gain and level.

73, Jim K9YC
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Re: [Elecraft] K3 PA IO TST Problem

[Johnny Siu]

Hi David,

Well, I think it is now the time to send your email to supp...@elecraft.com for 
assistance.

They know the KPA3 inside out.


cheers,

Johnny VR2XMC


--- 2010年12月12日 星期日，David Christ  寫道﹕

> 寄件人: David Christ 
> 主題: Re: [Elecraft] K3 PA IO TST Problem
> 收件人: "Johnny Siu" , Elecraft@mailman.qth.net
> 日期: 2010年12月12日,星期日,上午9:01
> This is during upgrading a K3/10 to a
> K3/100. 
> The PAIO test is done before the PA3 is 
> installed.  And yes I made sure the red wire was 
> on the pin with the silk screened word red behind 
> it.
> 
> I haven't taken time to study the schematics yet or take
> voltage readings.
> 
> David K0LUM
> 
> 
> At 8:16 AM +0800 12/12/10, Johnny Siu wrote:
> >Hello David,
> >
> >Could you take out the KPA3 module and just 
> >leave the PAIO board?  Do the test again so that 
> >we can determine whether the problem is solely 
> >coming from the PAIO board.
> >
> >The PAIO board can work without the power module 
> >and the K3 can function in QRP mode?
> >
> >BTW, do you install the fans connector in the 
> >correct way (beware of the position of the red 
> >wires)?
> >
> >
> >cheers,
> >
> >Johnny VR2XMC
> >
> >--- 2010îN12åé12ì™ êØä™ì™ÅCDavid Christ
> 
> õçì¼:
> >
> >
> >  > Bad 24 hours.  Last night we hit
> >>  a deer.  Tonight while installing a
> >>  KPA3 in my K3 it fails the PAIO tst. 
> No relay click.
> >>  No fan action.
> >>  Can't contact Elecraft until Monday.
> >>
> >>  Any suggestions to try over the weekend
> would be
> >>  appreciated.
> >>
> >>  David K0LUM
> >> 
> __
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> >>
> 
> 


  
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Re: [Elecraft] K3 PA IO TST Problem

[Mark Bayern]

> Can't contact Elecraft until Monday.

Your message on the reflector will probably get you some unofficial
help. Did you also send an email to k3supp...@elecraft.com? I think
telephone might be the only communications method that is limited to
business hours at Elecraft.

Mark  AD5SS




On Sat, Dec 11, 2010 at 6:08 PM, David Christ  wrote:
> Bad 24 hours.  Last night we hit a deer.  Tonight while installing a
> KPA3 in my K3 it fails the PAIO tst.  No relay click. No fan action.
> Can't contact Elecraft until Monday.
>
> Any suggestions to try over the weekend would be appreciated.
>
> David K0LUM
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Re: [Elecraft] K3 PA IO TST Problem

[David Christ]

This is during upgrading a K3/10 to a K3/100. 
The PAIO test is done before the PA3 is 
installed.  And yes I made sure the red wire was 
on the pin with the silk screened word red behind 
it.

I haven't taken time to study the schematics yet or take voltage readings.

David K0LUM


At 8:16 AM +0800 12/12/10, Johnny Siu wrote:
>Hello David,
>
>Could you take out the KPA3 module and just 
>leave the PAIO board?  Do the test again so that 
>we can determine whether the problem is solely 
>coming from the PAIO board.
>
>The PAIO board can work without the power module 
>and the K3 can function in QRP mode?
>
>BTW, do you install the fans connector in the 
>correct way (beware of the position of the red 
>wires)?
>
>
>cheers,
>
>Johnny VR2XMC
>
>--- 2010îN12åé12ì™ êØä™ì™ÅCDavid Christ  õçì¼:
>
>
>  > Bad 24 hours.  Last night we hit
>>  a deer.  Tonight while installing a
>>  KPA3 in my K3 it fails the PAIO tst.  No relay click.
>>  No fan action.
>>  Can't contact Elecraft until Monday.
>>
>>  Any suggestions to try over the weekend would be
>>  appreciated.
>>
>>  David K0LUM
>>  __
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[Elecraft] Yamaha CM500 and ANTIVOX setting

[Mike K2MK]

I decided to try the CM500 headset in place of the Elecraft Heil Proset
headset. I'm always on a quest for increased volume due to age related
decreased hearing. To that end I can emphatically say that the CM500 solves
my low audio level problem. The CM500 in the rear headphone jack provides
greater audio output then the Proset in the rear speaker jack. So far, so
good.

I tried the CM500 on SSB today in the 10 meter contest and had occasional
VOX tripping when listening to loud signals or loud noise. I'm using the
headphones and there is no speaker output. (I even held my breath to be sure
my breathing wasn't tripping the VOX). I reduced the VOX GAIN to 17. Any
lower and I couldn't always trip it reliably. My ANTIVOX was set at 20 for
the Proset so I began to crank it up. It's up to 80 now for the CM500 and
appears to have solved the problem. 

My other settings are:
RP.L BIAS
MIC GAIN = 10 for 5 to 7 ALC bars
Comp = 20 for 10db CMP

Has anyone else experienced this problem?

73,
Mike K2MK
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[Elecraft] [P3] Display of K3 parameters

[Al Lorona]

Months ago I had heard a rumor that the P3 could eventually function as a 
read-only display that could inform the operator of these various settings.

Al  W6LX

(Subject: line changed to reflect the current topic.)

> 
There's a great need for some simple utilities for the K3
that will run with LP-Bridge or other CAT port sharing schemes:  AGC/EQ
management, expanded rig display, subrx control (avoid BSET), etc

Barry N1EU
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Re: [Elecraft] K3 PA IO TST Problem

[Johnny Siu]

Hello David,

Could you take out the KPA3 module and just leave the PAIO board?  Do the test 
again so that we can determine whether the problem is solely coming from the 
PAIO board.

The PAIO board can work without the power module and the K3 can function in QRP 
mode?

BTW, do you install the fans connector in the correct way (beware of the 
position of the red wires)?


cheers,

Johnny VR2XMC


--- 2010年12月12日 星期日，David Christ  寫道﹕

> 寄件人: David Christ 
> 主題: [Elecraft] K3 PA IO TST Problem
> 收件人: Elecraft@mailman.qth.net
> 日期: 2010年12月12日,星期日,上午8:08
> Bad 24 hours.  Last night we hit
> a deer.  Tonight while installing a 
> KPA3 in my K3 it fails the PAIO tst.  No relay click.
> No fan action. 
> Can't contact Elecraft until Monday.
> 
> Any suggestions to try over the weekend would be
> appreciated.
> 
> David K0LUM
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[Elecraft] K3 PA IO TST Problem

[David Christ]

Bad 24 hours.  Last night we hit a deer.  Tonight while installing a 
KPA3 in my K3 it fails the PAIO tst.  No relay click. No fan action. 
Can't contact Elecraft until Monday.

Any suggestions to try over the weekend would be appreciated.

David K0LUM
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Re: [Elecraft] new firmware release

[wf4o]

Thanks,I haven't heard that before, but I will certainly do this from now on. 
It does seem to involve the MCU module etc. Thanks again.
On Dec 11, 2010, at 4:00 PM, G4LNA [via Elecraft] wrote:

> I used to get problems when I used to download the firmware and used the rig 
> straight away and I found that if I switched the rig on and off twice in a 
> row it functions perfectly after that, so I follow that procedure every time 
> I load the firmware now and never get a problem. 
> 
> View message @ 
> http://elecraft.365791.n2.nabble.com/new-firmware-release-tp5813395p5826846.html
> To unsubscribe from new firmware release, click here.


-- 
View this message in context: 
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[Elecraft] Re： Raves about the K3

[Johnny Siu]

Hello Ed,

I am also using IC7700.  Could you please share your comments in the IC7700 
yahoo mail reflector group?  I don't want to cross post your message in that 
group without your permission.


 cheers, 


Johnny VR2XMC 



- 郵件原件 
寄件人﹕ Ed Cienki 
收件人﹕ elecraft@mailman.qth.net
傳送日期﹕ 2010/12/12 (日) 1:42:55 AM
主題： [Elecraft] Raves about the K3

This is my first post to this reflector and would like to share some of my 
observations.

First. I have a 4xxx series K3, built by Elecraft that is fully outfitted and 
filtered running LP-Pan, an EMU-0202 and a MicroHam Station Master.

Second, I have been operating an IC-7700 for the past 2 yrs.

That being said I have run both rigs side-by-side into a IC-PW1 and Palstar 
AT-Auto.

I must say that each radio has its own benefits and is outstanding to operate, 
but here is where the K3 shines:

1. True dual VFO/dual receive;
2. Easy MARS modification (yes, I am a licensed AF MARS Operator);
3. IF out. LP-Pan and PowerSDR are outstanding;
4. ESSB - of course with the proper filtering being installed;
5. Tx Eq and Noise Gate - No out-board W2IHY EQ is needed (sorry Julius);
6. Light weight;
7. Unbelievable receive audio with the appropriate filtering; 
8. Menu flexibility;and
9. Easy updating of firmware.

Candidly, I still love and use the IC-7700, but more and more I am utilizing 
the 
K3.  The K3 is an outstanding value and robust transceiver.

As a separate matter (a bit of a rant here), and for example having seen the 
ARRL and Sherwood engineering reports regarding the FTDX-5000.  We as hams are 
always in search of "nirvana".  While I have heard the issues regarding the 
FTDX-5000 design that have not made the mainstream press, the issue here is not 
to bash Yaesu, but to congratulate and thank Wayne and Eric for the OUTSTANDING 
job, not only with the design and operation of the K3, but their support of the 
user group to identify issues and improvements  and their outstanding customer 
support when you call them for assistance. Kudos to Elecraft.

Best, 73, Ed, N2EAC

Sent on the Sprint® Now Network from my BlackBerry®
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Re: [Elecraft] Apple MacBook Pro Audio for PSK-31 with K2?

[James Sarte (K2QI)]

Alan, what MBP do you own?

I have a 2010 15" MBP, and it has separate stereo input and output
jacks.  I am able to input anything the K3 spits out with nothing more
than a regular stereo cable.

73,
James K2QI

On Thu, Dec 9, 2010 at 9:27 PM, Alan D. Wilcox
 wrote:
> Hello,
>
> The MacBook Pro has a single 1/8" audio connection for both mic in and
> external-speaker output. Unfortunately, that disables the internal speakers,
> preventing their use for monitoring. Also, the single "special" plug needs a
> homebrew Y-cable to get the input and output on separate connectors.
>
> Before I over-complicate what should be a simple interface to the K2, does
> anyone have a success story with the MacBook Pro?
>
> Cheers, Alan
>
> Alan D. Wilcox, W3DVX
> 570-321-1516
> http://WilcoxEngineering.com
> https://www.smashwords.com/books/view/28062
> Williamsport, PA 17701
>
>
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-- 
73 de James K2QI
President UNARC/4U1UN
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[Elecraft] Audio mixer request: A - A and B - B

[Barry N1EU]

Frank, I have made the exact same request for the exact same reason.

73, Barry N1EU


PA4N wrote:
"I have noticed that the CONFIG:L-MIX-R configuration setting
currently has six options:

A - B
A - AB
AB - B
AB - AB
A - B
A - AB

The keen reader will notice that option  5 equals option 1, and
option 6 equals option 2. This is probably a (cosmetic) bug.

Instead of correcting this flaw by removing options 5 and 6, I would
love to have the following settings for options 5 and 6:
A - A
B - B

This would enable me to implement an elegant AutoHotHey mono/stereo
toggle for my SO2V K3 (people doing SO2R with N1MM may know the
mono/stereo toggle as that what happens when you push the back-quote (`)
key)."
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[Elecraft] Audio mixer request: A - A and B - B

[Frank R. Oppedijk]

Hello,

I have noticed that the CONFIG:L-MIX-R configuration setting 
currently has six options:

A - B
A - AB
AB - B
AB - AB
A - B
A - AB

The keen reader will notice that option  5 equals option 1, and 
option 6 equals option 2. This is probably a (cosmetic) bug.

Instead of correcting this flaw by removing options 5 and 6, I would 
love to have the following settings for options 5 and 6:
A - A
B - B

This would enable me to implement an elegant AutoHotHey mono/stereo 
toggle for my SO2V K3 (people doing SO2R with N1MM may know the 
mono/stereo toggle as that what happens when you push the back-quote (`) key).

(Currently, I must use an ugly workaround in my AutoHotKey script in 
order to achieve the mono/stereo toggle: in mono mode, I set 
CONFIG:L-MIX-R= AB - AB and then set the RF gain of the receiver that 
must be muted to 0 and the other RF gain to max. While this does 
work, using the script I cannot use the RF gain front panel controls 
in their intended manner, thus reducing the number of options that I 
have to combat strong signals at the upper range of the K3's dynamic range...)

73,

Frank PA4N




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Re: [Elecraft] An AGC story

[Geoffrey Mackenzie-Kennedy]

Hi John,

The NPR test is, I agree, certainly a very useful method to expose IMD
problems, but I think that when used as a *diagnostic* tool the requirements
placed on the notch filter's bandwidth limits this method's versatility -
unless one is prepared to build a set of band reject filters (probably
crystal) that may be required, whose IMD contribution is much less that that
of the receiver, device or sub-system being tested.

To obtain low phase noise from my IMD test arrangement I have been using low
noise crystal oscillators followed by +40dbm output amplifiers, which is I
admit a cumbersome approach, but it did provide useful results until I
damaged the equipment while measuring the IMD generated by some types of RF
transformer - a sad story!

If Santa gave me a K3 I could stop speculating about its multi signal
performance :-)

73,
Geoff
GM4ESD


"juergen"  wrote on Saturday, December 11, 2010, at
6:18 PM:

> Hi Geoff

> The noise power ratio test(NPR) might show more clearly any mixer IMD
> problems. The NPR test might also better characterize any roofing filter 
> IMD
> as well.

> The noise power ratio test  better characterizes dynamic receiver
> performance. The NPR test  also does not require expensive low phase noise
> signal generators.

> 73
> John




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Re: [Elecraft] new firmware release

[G4LNA]

I used to get problems when I used to download the firmware and used the rig
straight away and I found that if I switched the rig on and off twice in a
row it functions perfectly after that, so I follow that procedure every time
I load the firmware now and never get a problem.
-- 
View this message in context: 
http://elecraft.365791.n2.nabble.com/new-firmware-release-tp5813395p5826846.html
Sent from the [K3] mailing list archive at Nabble.com.
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Re: [Elecraft] Noise Blanker Problems

[Gary Gregory]

Yes Geoff, 4.22 appears effect the DSP NB more here with me also.

I rarely use it but in the last few days I have been trying it out and I am
noticing a lot more artifacts than before.

73's
Gary

On Sun, Dec 12, 2010 at 5:29 AM, Ron D'Eau Claire  wrote:

> Not here Geoff, but I can't really tell. I assume there will be distortion
> any time one goes "whacking great holes" in the spectrum of a signal to
> blank noise pulses, and that will vary widely based on the strength of the
> signal, presence of nearby signals and many other factors.
>
> IIRC the exact nature of the process based on the settings for the NB in
> the
> K3 has changed from firmware rev to firmware rev too.
>
> Ron AC7AC
>
> -Original Message-
>
> Dave,
>
> It's also my impression that the DSP noise blanker introduces more
> distortion on SSB signals in Firmware 4.22 than in previous firmware. I
> haven't rolled back to a previous version to check it out like you have but
> I will next week.
>
> Anyone else notice this?
>
> 73 to all
>
> Geoff
> G3UCK
>
>
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-- 
Gary
VK4FD - Motorhome Mobile
http://www.qsl.net/vk4fd/
K3 #679, P3 #546
For everything else there's Mastercard!!!
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[Elecraft] Elecraft SSB net announcement

[Phil Shepard]

The weekly SSB net is scheduled for tomorrow (Sunday, 12/12/10 at 1800z). We 
meet on 14.314 MHz, unless QRM is prohibitive. I will not be able to make it 
this week, but Ken, KO5N, in New Mexico will be handling the net control 
duties. Have a great week. 
73,
Phil, NS7P


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Re: [Elecraft] Noise Blanker Problems

[Ron D'Eau Claire]

Not here Geoff, but I can't really tell. I assume there will be distortion
any time one goes "whacking great holes" in the spectrum of a signal to
blank noise pulses, and that will vary widely based on the strength of the
signal, presence of nearby signals and many other factors. 

IIRC the exact nature of the process based on the settings for the NB in the
K3 has changed from firmware rev to firmware rev too. 

Ron AC7AC

-Original Message-

Dave,

It's also my impression that the DSP noise blanker introduces more 
distortion on SSB signals in Firmware 4.22 than in previous firmware. I 
haven't rolled back to a previous version to check it out like you have but 
I will next week.

Anyone else notice this?

73 to all

Geoff
G3UCK


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[Elecraft] Correction in SSB net

[Phil Shepard]

Sorry, I listed Ken's call wrong. It should read KO5Y. 

Phil

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Re: [Elecraft] Noise Blanker Problems

[Geoffrey Downs]

Dave,

It's also my impression that the DSP noise blanker introduces more 
distortion on SSB signals in Firmware 4.22 than in previous firmware. I 
haven't rolled back to a previous version to check it out like you have but 
I will next week.

Anyone else notice this?

73 to all

Geoff
G3UCK

- Original Message - 
From: "David" 
To: 
Sent: Saturday, December 04, 2010 3:03 PM
Subject: [Elecraft] Noise Blanker Problems


> Using the latest Beta Firmware I notice distortion on the audio when using 
> the noise blanker even on low settings.  This applies whether dsp or if or 
> both are used.  On reverting to Firmware 4.14 no such distortion occurs. 
> Anyone else have similar problems?
>
> Dave G0AIX

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Re: [Elecraft] Is the P3 Now Shipping From Stock or Backordered?

[Eric Swartz WA6HHQ - Elecraft]

>From stock for some time :-)

73,
Eric

www.elecraft.com
_..._



On Dec 11, 2010, at 11:09 AM, "Jeff Maass"  wrote:

> 
> I'm thinking about getting one before my next trip to PJ2T for CQWW 160 CW
> in late January.
> 
> 73,  Jeff  K8ND
> 
> 
> 
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[Elecraft] Is the P3 Now Shipping From Stock or Backordered?

[Jeff Maass]

I'm thinking about getting one before my next trip to PJ2T for CQWW 160 CW
in late January.

73,  Jeff  K8ND



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Re: [Elecraft] Raves about the K3

[don Swetzig]

Please share your RX settings for SSB and your method of determining them

Thx
Don
KD8NNU



-- Sent from my Palm Pre
On Dec 11, 2010 12:42 PM, Ed Cienki  wrote: 

This is my first post to this reflector and would like to share some of my 
observations.



First. I have a 4xxx series K3, built by Elecraft that is fully outfitted and 
filtered running LP-Pan, an EMU-0202 and a MicroHam Station Master.



Second, I have been operating an IC-7700 for the past 2 yrs.



That being said I have run both rigs side-by-side into a IC-PW1 and Palstar 
AT-Auto.



I must say that each radio has its own benefits and is outstanding to operate, 
but here is where the K3 shines:



1. True dual VFO/dual receive;

2. Easy MARS modification (yes, I am a licensed AF MARS Operator);

3. IF out. LP-Pan and PowerSDR are outstanding;

4. ESSB - of course with the proper filtering being installed;

5. Tx Eq and Noise Gate - No out-board W2IHY EQ is needed (sorry Julius);

6. Light weight;

7. Unbelievable receive audio with the appropriate filtering; 

8. Menu flexibility;and

9. Easy updating of firmware.



Candidly, I still love and use the IC-7700, but more and more I am utilizing 
the K3.  The K3 is an outstanding value and robust transceiver.



As a separate matter (a bit of a rant here), and for example having seen the 
ARRL and Sherwood engineering reports regarding the FTDX-5000.  We as hams are 
always in search of "nirvana".  While I have heard the issues regarding the 
FTDX-5000 design that have not made the mainstream press, the issue here is not 
to bash Yaesu, but to congratulate and thank Wayne and Eric for the OUTSTANDING 
job, not only with the design and operation of the K3, but their support of the 
user group to identify issues and improvements  and their outstanding customer 
support when you call them for assistance. Kudos to Elecraft.



Best, 73, Ed, N2EAC



Sent on the Sprint® Now Network from my BlackBerry®

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Re: [Elecraft] An AGC story

[juergen]

Hi Geoff

The noise power ratio test(NPR) might show more clearly any mixer IMD problems. 
The NPR test might also better characterize any roofing filter IMD as well. 

The noise power ratio test  better characterizes dynamic receiver performance. 
The NPR test  also does not require expensive low phase noise signal generators.

73
John

--- On Sat, 12/11/10, Geoffrey Mackenzie-Kennedy  wrote:

> From: Geoffrey Mackenzie-Kennedy 
> Subject: Re: [Elecraft] An AGC story
> To: "Kok Chen" 
> Cc: "Elecraft Discussion List" 
> Date: Saturday, December 11, 2010, 5:26 AM
> Chen,
> 
> It is not really my place to comment on this subject not
> having a K3 to
> measure, but I would like to offer the following thoughts
> related to the
> "naughty things" you mention.
> 
> Whereas measuring the receiver's audio output level vs.the
> level of a single
> signal injected into the antenna input port will obviously
> provide some good
> information about the AGC's control characteristics,
> unfortunately this
> measurement does not provide any hard data as to whether or
> not
> intermodulation generated in the IF stages will become or
> is an issue when
> two or more strong signals get through the roofer in use.
> 
> Given that the 1db compression point of a typical SA612
> mixer is reached
> when the *composite* power of all signals reaching its
> input is
> approximately minus 25dbm, and given that positive gain
> exists between the
> antenna port and the SA612's input when both the Preamp and
> Attenuator are
> OFF, in the region of 6db I believe when a 400 Hz roofer is
> in place, then
> in the *absence* of any HAGC action the SA612 would enter
> compression when
> the *composite* power of all signals at the antenna port
> that eventually get
> through the roofer is only minus 31dbm. At this level
> *without* HAGC applied
> there would be, of course, a large number of of strong odd
> order intermod
> products appearing at the SA612's output should multiple
> signals get through
> the roofer.
> 
> Now bring in the HAGC.
> 
> Because part of the method used to control IF gain by the
> HAGC involves
> current starvation of the J309 IF amplifier, it is
> *possible* that with HAGC
> applied the Output Intercept (OIP3) of this amplifier might
> decrease,
> thereby increasing the level of IMD products generated by
> this amplifier.
> 
> So, even though the HAGC might prevent the SA612 from
> approaching
> compression, much of the HAGC's protective work in terms of
> reducing
> unwanted IMD products *might* be undone by the J309 when it
> is starved of
> current. Please understand that this is pure speculation on
> my part.
> 
> If I had a K3, before I changed the HAGC threshold my
> *first* measurement
> would be to look at the output of the SA612 mixer (with a
> spectrum analyser)
> while introducing two or more very close spaced signals
> into the antenna
> port, so that these signals do get through the roofer - as
> in a pileup. The
> objective, of course, would be to obtain an acceptably
> clean output from the
> mixer with non intrusive products over a wide range of
> antenna input levels.
> IMHO the higher the HAGC's threshold can be the better,
> provided that its
> control is tight enough when activated to protect all what
> follows.
> 
> 73,
> Geoff
> GM4ESD
> 
> 
> Kok Chen wrote on Thursday, December 09, 2010, at 7:05 PM:
> 
> > We know that the S9+ signals have to be kept from
> saturating the A/D
> > converter (or even kept in check so the large signal
> doesn't do
> > naughty things to the IF amplifier and the SA612
> second mixer -- I
> > don't know which of these three is the wimpiest in the
> chain).  So
> > some AGC is neccessary.
> 
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> 


  
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Re: [Elecraft] W2 Bug

[K5WA]

Jacques,

Is it possible that you have accidentally put the W2 into the auto-sensor
mode that monitors BOTH S1 and S2?  That is one reason the S1/S2 lights
blink alternately.  I use my W2 in an SO2R station and I prefer it this way
but if you are using a single sensor, it will not give you the result you
want.  Also, I had a lightning strike at my station and saw VERY sporadic
readings from the W2 before I replaced the sensors.  Once I replaced the
sensors and the W2, everything worked as expected.  Is it possible you had a
lightning surge?

Good luck figuring it out.  Mine is working very well and I am happy with
it.

A+

Bob K5WA


Message: 2
Date: Sat, 11 Dec 2010 13:36:22 -
From: "f9oj" 
Subject: [Elecraft] W2  bug
To: 
Message-ID: <369af250e63349b4952b8dd8e520c...@proprietairepc>
Content-Type: text/plain;   charset="iso-8859-1"

My W2 wattmeter refuses to display power and swr values...only the S1 and S2
led fliker altenatively, and the auto led on the range line is continuously
lit up !
Nothing can change this abnormal set up.
So far, it had been working normally, as well as the PC extension. 
Has anyone any idea ?
Thanks for any info !
Best 73
Jacques de F9OJ

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Re: [Elecraft] K144XV Manual (corrected)

[Ron D'Eau Claire]

TRN0 identifies the transverter as being the internal unit that switches
crystals. From the K144XV manual:

"2) Setting ADR to Int. Trn0 tells the K3 the internal 2 meter module is
being used rather than an external
transceiver. This sets up the KXV3A correctly and enables automatic K144XV
crystal switching at the146
MHz boundary. Any value from Int. Trn0 through Int. Trn9 may be used, but
Int. Trn0 is the default for 144
MHz operation. Int. Trn1 through Int. Trn9 provide unique band data signals
at the KRX3 output that may
be used to control external higher-frequency transverters connected to the
K144XV. See Band Data in the
K3 Owner's manual for details about the data signals." 

At one time, TRN1 was used for this, but it the firmware was changed last
September and the manual was updated accordingly. 

Ron AC7AC

-Original Message-

  John,

It seems that any of the "Int Trn x" can be used - the difference is in 
the band decoder output.  See page 19 of the K3 manual.

73,
Don W3FPR

On 12/11/2010 7:29 AM, John Ragle wrote:
> I presume that the statement in the K144XV manual on P. 19, Step 2
> should read*Int Trn 0* not*Int Trn 1*?
>
> John Ragle -- W1ZI
>


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[Elecraft] K3: Voice Fast Monitor

[Tom Boucher]

As the person, or one of them, who asked for the Voice Tx Fast Monitor facility 
which has been included in V.4.22, can I say 'thanks' to Wayne & Lyle for this 
new feature? It allows sidetone monitoring of transmitted audio without the 
somewhat disconcerting delay, albeit without hearing any compression. If you 
want to hear the level of compression, a touch of one of the mic controls while 
you are transmitting changes the sidetone over to monitoring the true 
transmitted audio.

Also the APF is going to be great for pulling out those weak topband signals. 
All I need now is a fix so the K3 will operate at temperatures below 15C, then 
I can get rid of the 100 watt tubular heater which burns continually underneath 
it!

73
Tom G3OLB
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[Elecraft] Raves about the K3

[Ed Cienki]

This is my first post to this reflector and would like to share some of my 
observations.

First. I have a 4xxx series K3, built by Elecraft that is fully outfitted and 
filtered running LP-Pan, an EMU-0202 and a MicroHam Station Master.

Second, I have been operating an IC-7700 for the past 2 yrs.

That being said I have run both rigs side-by-side into a IC-PW1 and Palstar 
AT-Auto.

I must say that each radio has its own benefits and is outstanding to operate, 
but here is where the K3 shines:

1. True dual VFO/dual receive;
2. Easy MARS modification (yes, I am a licensed AF MARS Operator);
3. IF out. LP-Pan and PowerSDR are outstanding;
4. ESSB - of course with the proper filtering being installed;
5. Tx Eq and Noise Gate - No out-board W2IHY EQ is needed (sorry Julius);
6. Light weight;
7. Unbelievable receive audio with the appropriate filtering; 
8. Menu flexibility;and
9. Easy updating of firmware.

Candidly, I still love and use the IC-7700, but more and more I am utilizing 
the K3.  The K3 is an outstanding value and robust transceiver.

As a separate matter (a bit of a rant here), and for example having seen the 
ARRL and Sherwood engineering reports regarding the FTDX-5000.  We as hams are 
always in search of "nirvana".  While I have heard the issues regarding the 
FTDX-5000 design that have not made the mainstream press, the issue here is not 
to bash Yaesu, but to congratulate and thank Wayne and Eric for the OUTSTANDING 
job, not only with the design and operation of the K3, but their support of the 
user group to identify issues and improvements  and their outstanding customer 
support when you call them for assistance. Kudos to Elecraft.

Best, 73, Ed, N2EAC

Sent on the Sprint® Now Network from my BlackBerry®
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Re: [Elecraft] VFO A & B tracking?

[Ron D'Eau Claire]

Load the PDF of the manual in your Acrobat reader, enter "link" in the
search window then click on the right arrow multiple times to find all the
places discussing the linking of the VFO's. 

Ron AC7AC

-Original Message-

I have got to read the manual again.  I did not know you could do this.

Nice!

Lee K0WA


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Re: [Elecraft] VFO A & B tracking?

[Lee Buller]

I have got to read the manual again.  I did not know you could do this.  
Nice!

Lee K0WA



Your VFOs may be linked.  Try holding the SUB button (to the right of the
VFO A knob and down) until the VFO B display area shows "unlined".

73 de Dick, K6KR
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[Elecraft] XG1

[Mike Harris]

G'day,

A cautionary tale.

I decided to check the total receive signal loss through my system
from the coax termination in the wall to the K3, via the amp and
antenna switching having had a hot switching event.

I first plugged the XG1 directly into the K3 and with the agc off
set the dBV reading to 0.0 with 50uV.  Next moved the XG1 right to
the end of the last internal coax cable.  -1.7dBV!

Whilst moving the XG1 I noticed that the reading returned to the set
point 0.0 dBV when I picked it up.

I turned out that placing the XG1 on its rubber feet on a metallic
surface (the case of the linear) resulted in this signal loss.
Holding the XG1 in the air by the cable that connected it to the K3
removed this loss.  I didn't check the effect of placing it on the
wooden desk surface.

When connected to the K3 I simply use a BNC to PL259 adapter and it
sticks out the back self supported.

Just an observation.

Regards,

Mike VP8NO

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[Elecraft] N2CQ QRP Contest Calendar: Dec 11, 2010 - Jan 14, 2011

[Ken Newman]

~
N2CQ QRP CONTEST CALENDAR
December 11, 2010 - January 14, 2011
~
80 METER FOXHUNT (CW) *** QRP Contest ***
Each Tuesday Thru Mar 15
9 PM to 10:29 PM Eastern Time USA
Info: http://www.qrpfoxhunt.org/
~
40 METER FOXHUNT (CW) *** QRP Contest ***
Each Thursday Thru March 17
9 PM to 10:29 PM Eastern Time USA
Info: http://www.qrpfoxhunt.org/
~
Feld Hell Club Sprint (Feld Hell) ... QRP Category
Dec 11, z to 2400z
Rules: http://sites.google.com/site/feldhellclub/Home
~
ARRL 10 Meter Contest (CW/SSB) ... QRP Category
Dec 11, z to Dec 12, 2359z
Rules: http://www.arrl.org/10-meter
~
MDXA PSK-31/63 DeathMatch  ... QRP Category
Dec 11, z to Dec 12, 2400z
Rules: http://www.mdxa1.org/deathmatch.html
~
UBA Low Band Winter Contest (CW/SSB/RTTY/PSK) .. QRP Category
Dec 11, 1700z to 2100z and
Dec 12, 0600z to 1000z 
Rules: 
http://www.uba.be/sites/default/files/uploads/hf_contests/uba_winter_en.pdf
~
SKCC Weekend Sprintathon (Straight Key CW) ... QRP Category
Dec 12, z to 2359z
Rules: http://www.skccgroup.com/sprint/wes/
~
The Great Colorado Snowshoe Run (20M CW) *** QRP Contest ***
MST: Dec 12, 1400 to 1559
UTC: Dec 12, 2100z to 2259z
Rules: http://www.cqc.org/contests/snow2010.htm
~
NAQCC Straight Key/Bug Sprint (CW) *** QRP Contest ***
EST: Dec 14, 8:30 PM to 10:30 PM
UTC: Dec 15, 0130Z to 0330Z
Rules: http://home.windstream.net/yoel/contests.html
~
OK DX RTTY Contest
Dec 18, z to 2400z
Rules: http://www.crk.cz/ENG/DXCONTE
~
RAC Canada Winter Contest (All) ... QRP Category
Dec 18, z to  2359z 
Rules: http://www.rac.ca/service/contesting/
~
Croatian CW Contest (CW) ... QRP Category
Dec 18, 1400z to Dec 19, 1400z
Rules: http://www.9acw.org
~
Stew Perry (W1BB) 
Topband Distance Challenge (CW) ... QRP Category
Dec 18, 1500z to Dec 19, 1500z
Rules: http://web.jzap.com/k7rat/stew.html
~
Holiday Spirits Homebrew Sprint (CW) *** QRP Contest ***
Dec 19, 2000z to 2359z  
Rules: http://www.qrparci.org
~
Rookie Roundup (CW) 100W Max
Dec 19, 1800z to 2359z
Rules: http://www.arrl.org/rookie-roundup
~
RUN FOR THE BACON (CW) *** QRP CONTEST ***
EST: Dec 19, 9 PM to 11 PM
UTC: Dec 20, 0200z 0400z
Rules: http://www.fpqrp.com/
~
SKCC Sprint (Straight Key CW)  ... QRP Awards
Dec 22, z to 0200z
Rules: http://www.skccgroup.com/sprint/sks/
~
R A E M Contest (CW) .. Low Power category
Dec 26, z to 1159z
Rules: http://www.srr.ru/CONTEST/cup_raem_engl_10.php
~
NACC Straight Key/Bug Sprint (CW mw Special) ***QRPp Contest***
Dec 30, 0130z to 0330z 
Rules: http://home.windstream.net/yoel/contests.html
~
~
Straight Key Night (CW) 
UTC: Jan 1, z to 2400z 
Info: http://www.arrl.org/straight-key-night
~
AGB "New Year SnowBall" Contest (80M CW/SSB) ...QRP Category
Jan 1, z to 0100z 
Rules: http://www.ev5agb.com/contest/agb_nysb.htm
~
AGCW Happy New Year Contest (CW)...QRP Category
Jan 1, 0900z to 1200z
Rules: http://www.agcw.org/en/?Contests:Happy_New_Year_Contest
~
AGCW VHF/UHF CW Contest ... QRP Category
Jan 1, 1400z to 1659z (144 Mhz)
Jan 1, 1700z to 1759z (432 Mhz)
Rules: http://www.agcw.org/en/?Contests:VHF-UHF_Contest
~
Original QRP Contest ... QRP Category
Jan 1, 1500z to Jan 2, 1500z
Rules: http://www.qrpcc.de/contestrules/oqrpr.html
~
QRPARCI Pet Rock Celebration (CW) *** QRP Contest ***
Jan 1, 1500z to 1800z
(Bonus points for rockbound equipment)
Rules: http://www.qrparci.org/
~~

Re: [Elecraft] Elecraft website down

[Gary]

Nevermind. It seems to be working now.
Gary

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary
Sent: Saturday, December 11, 2010 6:43 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Elecraft website down

It seems the Elecraft website is down this morning.
Gary

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[Elecraft] Elecraft website down

[Gary]

It seems the Elecraft website is down this morning.
Gary

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[Elecraft] W2 bug

[f9oj]

My W2 wattmeter refuses to display power and swr values...only the S1 and S2 
led fliker altenatively, and the auto led on the range line is continuously
lit up !
Nothing can change this abnormal set up.
So far, it had been working normally, as well as the PC extension. 
Has anyone any idea ?
Thanks for any info !
Best 73
Jacques de F9OJ
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Re: [Elecraft] An AGC story

[Geoffrey Mackenzie-Kennedy]

Chen,

It is not really my place to comment on this subject not having a K3 to
measure, but I would like to offer the following thoughts related to the
"naughty things" you mention.

Whereas measuring the receiver's audio output level vs.the level of a single
signal injected into the antenna input port will obviously provide some good
information about the AGC's control characteristics, unfortunately this
measurement does not provide any hard data as to whether or not
intermodulation generated in the IF stages will become or is an issue when
two or more strong signals get through the roofer in use.

Given that the 1db compression point of a typical SA612 mixer is reached
when the *composite* power of all signals reaching its input is
approximately minus 25dbm, and given that positive gain exists between the
antenna port and the SA612's input when both the Preamp and Attenuator are
OFF, in the region of 6db I believe when a 400 Hz roofer is in place, then
in the *absence* of any HAGC action the SA612 would enter compression when
the *composite* power of all signals at the antenna port that eventually get
through the roofer is only minus 31dbm. At this level *without* HAGC applied
there would be, of course, a large number of of strong odd order intermod
products appearing at the SA612's output should multiple signals get through
the roofer.

Now bring in the HAGC.

Because part of the method used to control IF gain by the HAGC involves
current starvation of the J309 IF amplifier, it is *possible* that with HAGC
applied the Output Intercept (OIP3) of this amplifier might decrease,
thereby increasing the level of IMD products generated by this amplifier.

So, even though the HAGC might prevent the SA612 from approaching
compression, much of the HAGC's protective work in terms of reducing
unwanted IMD products *might* be undone by the J309 when it is starved of
current. Please understand that this is pure speculation on my part.

If I had a K3, before I changed the HAGC threshold my *first* measurement
would be to look at the output of the SA612 mixer (with a spectrum analyser)
while introducing two or more very close spaced signals into the antenna
port, so that these signals do get through the roofer - as in a pileup. The
objective, of course, would be to obtain an acceptably clean output from the
mixer with non intrusive products over a wide range of antenna input levels.
IMHO the higher the HAGC's threshold can be the better, provided that its
control is tight enough when activated to protect all what follows.

73,
Geoff
GM4ESD


Kok Chen wrote on Thursday, December 09, 2010, at 7:05 PM:

> We know that the S9+ signals have to be kept from saturating the A/D
> converter (or even kept in check so the large signal doesn't do
> naughty things to the IF amplifier and the SA612 second mixer -- I
> don't know which of these three is the wimpiest in the chain).  So
> some AGC is neccessary.

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Re: [Elecraft] K144XV Manual (corrected)

[Don Wilhelm]

  John,

It seems that any of the "Int Trn x" can be used - the difference is in 
the band decoder output.  See page 19 of the K3 manual.

73,
Don W3FPR

On 12/11/2010 7:29 AM, John Ragle wrote:
> I presume that the statement in the K144XV manual on P. 19, Step 2
> should read*Int Trn 0* not*Int Trn 1*?
>
> John Ragle -- W1ZI
>
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Re: [Elecraft] unusual problem

[Lou Kolb]

Sam,

Not sure which accessory is the KXV3a.  I do have the internal tuner and a 
G5RV  and a tribander hooked to the A and B antenna jacks.  I have no amp 
and use the G5RV most of the time.  I should also mention that everytime 
this has happened, it's been right after turning the rig on after it has 
been sitting overnight in a chilly shack.  It'll arc for a few seconds, only 
while transmitting, and then settle down.  So far, I haven't noticed any 
other anomales in the operation of the rig.  Lou WA3MIX
- Original Message - 
From: "Sam Morgan" 
To: "Lou Kolb" 
Sent: Saturday, December 11, 2010 8:01 AM
Subject: Re: [Elecraft] unusual problem


> Do you have the KXV3A in your K3?
> I had the KXV3A in mine and added an antenna to the RX ANT IN
> Then I transmitted on another antenna.
> Everything was fine when running 100w.
> Then I turned on my Ameritron AL-811 amp.
> When I transmitted I heard a sizzling sound,
> and smelled something burning.
>
> It turns out my RX antenna was to close to my TX antenna.
> The result was the GAP 1 melted the solder holding it.
> It then dropped on the top of the relays on the KXVA3 board.
> Since the GAP 1 is ceramic,
> the heat from it melted the plastic case on the relays,
> causing the burnt electronics smell.
>
> The rig continued to work, but the RX antenna no longer worked.
> Perhaps this is your problem?
>
> GB & 73
> K5OAI
> Sam Morgan
>
> On 12/11/2010 6:36 AM, Lou Kolb wrote:
>> Recently, I started noticing a strange sound from my K3-4290.  When 
>> keying
>> the rig on CW I'll hear a crackling or almost a gurgling sound coming 
>> from
>> the radio itself.  It's only happened 2 or at most 3 times but this 
>> morning
>> I smelled something for the first time.  It started happening right after 
>> I
>> upgraded the firmware although I doubt there's a connection.  I'm 
>> guessing a
>> coil could be arcing, although as a person who is blind, I'm afraid I 
>> can't
>> offer any visual data.  Any thoughts?  Lou WA3MIX
>> 

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[Elecraft] unusual problem

[Lou Kolb]

Recently, I started noticing a strange sound from my K3-4290.  When keying 
the rig on CW I'll hear a crackling or almost a gurgling sound coming from 
the radio itself.  It's only happened 2 or at most 3 times but this morning 
I smelled something for the first time.  It started happening right after I 
upgraded the firmware although I doubt there's a connection.  I'm guessing a 
coil could be arcing, although as a person who is blind, I'm afraid I can't 
offer any visual data.  Any thoughts?  Lou WA3MIX 

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[Elecraft] K144XV Manual (corrected)

[John Ragle]

I presume that the statement in the K144XV manual on P. 19, Step 2 
should read*Int Trn 0* not*Int Trn 1*?

John Ragle -- W1ZI
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[Elecraft] UK Elecraft Net

[Ian Maude]

Hi all,
I will be running the Elecraft net as usual on 3658 +/- QRM at 09:00z
tomorrow (12/12/10).  I have had various questions regarding frequency and
time changes.  We have tried 40m in an attempt to see if we could cover more
of Europe but unfortunately at that time, it is almost impossible to hear
inter-G activity.  As for time, 09:00 is the time I have available to run
the net.  Signals are also quite good at that time now.  If anyone wants to
run a 40m net at another time, feel free :)

That said, if you have a K2 or K3 and you have some time tomorrow morning
between 09:00 and 10:00z, I would be very happy to hear you!

73 Ian
--
Ian J Maude, G0VGS
SysOp GB7MBC & HB9DRV-9 DX Clusters
Member RSGB, GQRP 9838, FISTS 14077 | K3 #455
http://www.m0scg.org.uk
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