Re: [Elecraft] (K3) Updates and chatter

[Stewart Baker]

On Tue, 21 Jul 2009 09:29:18 -0700, Mike Scott wrote:
>>   What has happened to the frequent K3 beta updates and all the
>>chatter that accompanied them? I haven't kept up with the list very well
>>but have noticed that content seems to be missing these days.
>
>
> Wayne went on a 3-week vacation :)
>
> Mike Scott - AE6WA
> Tarzana, CA (DM04 / near LA)
> NAQCC 3535
> K3-100 #508 / KX1  #1311
>
I hope that he took his laptop with the K3 development software installed :-))

Stewart G3RXQ
>
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Re: [Elecraft] (K3) Updates and chatter

[Stewart Baker]

The Gurus must be working on some massive release of new firmware :-)

Stewart G3RXQ
On Mon, 20 Jul 2009 12:21:57 -0500, sr...@swbell.net wrote:
> What has happened to the frequent K3 beta updates and all the
> chatter that accompanied them? I haven't kept up with the list very well but
> have noticed that content seems to be missing these days.
>
>
> Stan Rife
> W5EWA
>
>
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Re: [Elecraft] K3 - TX gate issue

[Stewart Baker]

I have it on my K3. Slight, but noticeable.

Stewart G3RXQ 
On Sun, 12 Jul 2009 23:13:50 -0400, Terry Price wrote:
>
> Has anyone else noticed some distortion using the tx gate 
option? I heard it
> on a friends' K3 and tested it on mine, while listening on 
headphones and
> the monitor on, after each word or syllable, I hear some 
distortion or
> "crackling" noise. It seems to be when the setting is at 13 or 
above. I've
> heard it on 3 different K3's of different vintages but all 
running 3.19.
>
> Terry
>
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Re: [Elecraft] K3 double beep when not connected

[Stewart Baker]

My late parents spent an entire week looking for a trapped bird in their house.
A neighbour found the smoke alarm birdie :-)

73
Stewart G3RXQ
>
> The only beep-beeping I've come across has been laptop PCs left on standby
> warning that their batteries are about to run down. I think some mobile
> phones and VHF hand-helds might do that too.
>
> It's very hard to determine where an infrequent beeping sound is coming
> from. My wife and I were once woken in the night and spent about an hour
> searching for the source of a regular but infrequent beep, which turned out
> to be the (mains powered) smoke alarm telling us that the backup batteries
> (which I didn't even know existed, and which were 6 years old) were about to
> die.
>
> -
> Julian, G4ILO. K2 #392  K3 #222.
> * G4ILO's Shack - http://www.g4ilo.com
> * KComm - http://www.g4ilo.com/kcomm.html
> * KTune - http://www.g4ilo.com/ktune.html


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Re: [Elecraft] K3 Filter Question

[Stewart Baker]

I agree.
The cost of the K3 filters is now so high in the UK, that I want to
get away with the minimum number necessary.

73
Stewart G3RXQ
On Thu, 9 Jul 2009 10:00:42 -0400, Joe Subich, W4TV wrote:
>
>> I wonder if there is any possibility of allowing AM TX and/or
>> ESSB via the FM filter...
>
> It is theoretically possible to transmit AM and ESSB through
> the FM filter but the K3 is currently configured to prohibit
> AM and ESSB transmit unless the 6 KHz filter is used.  I have
> transmitted using the FM filter by setting the K3 as if the
> FM filter was an AM filter but then I can not transmit FM
> without resetting the filter set-up.
>
> Elecraft will argue that the 6 KHz filter is necessary to
> prevent transmitted images (the DSP IF is 15 KHz, the image
> is 30 KHz away from the transmit frequency).  However, I
> can not measure any image - to -120 dB from the CW level -
> when looking at the transmitter output with a directional
> coupler using the SDR-IQ as a spectrum analyzer.  This
> is as expected since the FM filter should be at least -60
> dB at +/-23 (2:1 shape factor) with an ultimate attenuation
> of at least -100 dB.
>
> It would certainly be nice if the "6 KHz" restriction was
> removed.
>
> 73,
>
>   ... Joe, W4TV
>
>
>> -Original Message-
>> From: elecraft-boun...@mailman.qth.net
>> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brett Howard
>> Sent: Thursday, July 09, 2009 2:21 AM
>> To: Bob Cunnings
>> Cc: elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] K3 Filter Question
>>
>>
>> I forgot to go back to that...  I was thrown off by the
>> comment on the order page that said you only need one of each
>> filter for transmit.  I know that doesn't fully say what I
>> was hoping for though
>>
>> I wonder if there is any possibility of allowing AM TX and/or
>> ESSB via the FM filter...  As I'd like to have maximum
>> flexibility but only have one slot left because of the way I
>> have setup the radio for what I spend most of my time doing.
>>
>> Thanks for the assistance gentlemen.
>>
>> ~Brett
>>
>> On Thu, 2009-07-09 at 00:13 -0600, Bob Cunnings wrote:
>> > Manual, pg 74:
>> >
>> > "Rule #1: If you plan to use a particular filter for both
>> transmitting
>> > and receiving (main receiver), you'll need to install it on the RF
>> > board. You can optionally install a filter of the same or similar
>> > bandwidth on the sub receiver for receive-only use. (This is
>> > recommended since it will keep the receivers identical.)"
>> >
>> > Bob NW8L
>> >
>> > On Wed, Jul 8, 2009 at 11:31 PM, Brett
>> Howard
>> > wrote:
>> > > Ok so I'm curious if I'll be able to do what I'd like.
>> I'd like to
>> > > setup my K3 for maximum flexibility.  At the moment I have these
>> > > filters.
>> > >
>> > > 2.8Khz
>> > > 1.8Khz
>> > > 1Khz
>> > > 250Hz
>> > >
>> > > These 4 filters are duplicated in the lower 4 slots of both
>> > > receivers. I'd like to have the ability to do AM and FM
>> both TX and
>> > > RX in this radio.  Can I add the AM filter and KBPF into
>> the main RX
>> > > and then put the FM filter into the KRX3?
>> > >
>> > > I'm hoping that I can then use the MainRX for broad frequency
>> > > coverage and AM broadcast receive.  Then if I ever want to do FM
>> > > work I simply have to use the sub receiver to do so.  Will TX
>> > > through the FM filter work with it in the sub RX...  To
>> the best of
>> > > my knowledge it appears that I can set the rig up in this fashion
>> > > but that doesn't always mean it will work how I expect it to.
>> > >
>> > > Am I all wet here?
>> > >
>> > > Thanks
>> > >
>> > > ~Brett
>> > >
>> > > __
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Re: [Elecraft] SPL N/A with everybody on CW?

[Stewart Baker]

Yes, I too had the feeling that this used to work.

Stewart G3RXQ
On Fri, 19 Jun 2009 22:42:52 -0700, Brett Howard wrote:
> I should also state that I swear this was just working a minute 
ago and
> now I seem to always get SUB N/A unless both VFO's are on the 
same band.
>
> On Fri, 2009-06-19 at 22:20 -0700, Brett Howard wrote:
>> Right now I've got VFO A on 14.030.00 and VFO B on 7.027.00 and 
I'd like
>> to transmit on the VFO B freq.  Or I'm trying to setup N1MM so 
that when
>> I click on the VFO B log section that it switches on split so 
that I can
>> TX in the right band.  But I keep getting SPL N/A.  I even then 
tapped
>> A->B twice and then went back to those frequencies and still 
got SPL
>> N/A.  Seems like I'm unable to use the split and TX on VFO B if 
I'm on
>> independant bands?  And yes both are set to CW.
>>
>> Any ideas what I'm doing wrong?
>>
>
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Re: [Elecraft] K3 Noise Reduction..revisited

[Stewart Baker]

I agree, whatever algorithm BHI uses,  it really works.

73
Stewart G3RXQ
On Wed, 29 Apr 2009 16:05:07 -0500, Bill NY9H wrote:
> I have two "Hear-it" speakers from England's BHI company hooked 
thru
> my microham controller's headphone outputwhich is connected 
to
> the 7800 & the K3.
>
> With a low- mid aggressive setting they don't sound anything 
but
> quieter. (what a concept)...  leave them in line most all the 
time.
>
> No gurgling, whooshing... or D-Star audio emulations.
> (Much better than the NCT licensed stuff Clearspeech/Heil now 
West
> Mountain Radio).
>
> Granted if I was using a GrandioseSweetness18" 3 way, I might 
have a
> different outcome. Then again I could pipe it thru my UREI
> "time-aligned" monitors.
>
> 40 years in the audio business.tells me the BHI algorithm is 
a
> winner whatever they are doing ...I wish Lyle would do   ( 
if the
> DSP can handle it  )
> And I do know the existing design does it the other way .
>
> Seems we revisit this one about every 118 days..
>
> bill
>
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Re: [Elecraft] My K3's hissy and noisy audio

[Stewart Baker]

Audio response seems to be a difficult area for Elecraft.
SSB from the K2 often received poor reports because of the 
excessive LF response in the TX audio stages. 
It could be cured by reducing coupling capacitor values.
The K3 RX audio appears to need the opposite approach.

Stewart G3RXQ

On Mon, 6 Apr 2009 06:54:21 -0400, Paul Christensen wrote:
>> Perhaps the band noise is more obvious in the K3 because the 
low frequency
>> audio is restricted causing the noise to be distributed over a 
more narrow
>> range. This lack of bass tends to induce for ear fatigue.
>> Steve Ellington
>
> I agree with Steve on this one.  Once more low-end was rolled 
into my audio
> hardware changes, I noticed a significant reduction in my own 
listener
> fatigue.
>
> Others have noted the K3's audio frequency response variance 
across
> different headphone models, most notably the Heil product.  The 
K3's
> headphone circuit uses 10 uF of series capacitance from the 
headphone amp to
> each of the headphone coils.
>
> For the moment, assume that your headphones are 32-ohms (ref 
100Hz).  What
> is the best possible low-end response from the K3?  The answer 
is 500 Hz
> @ -3dB.  That part of the circuit needs some help.  With a 
headphone Z even
> lower toward 8-ohms, the attenuation of bass response is worse.
>
> Now upgrade the series caps to 330 uF and re-run the 
calculation.  With
> 32-ohm phones (ref 100 Hz), the frequency response improves to 
15 Hz.  Now
> that's t real Hi-Fi on par with what Icom delivers and the 
difference is
> immediately noticeable to anyone -- not just the folks with 
"golden ears."
>
> Finally, compare the result of the modified K3 with the Icom 
'7700 or '7800.
>
> Paul, W9AC
>
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[Elecraft] OT Relays with diodes built in (inductive kick)

[Stewart Baker]

A "catcha" to be aware of if you are building kit that uses DIL plugin relays.
Some of these relays have diodes already fitted internally across the coil.
I have built a couple of projects on PCB's, and wondered why the relay would 
not operate.
Reversing the coil connections got things working.

73
Stewart G3RXQ
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Re: [Elecraft] My K3's hissy and noisy audio

[Stewart Baker]

That's my view as well.

Stewart G3RXQ
On Sun, 5 Apr 2009 17:09:08 -0400, Steve Ellington wrote:
> Perhaps the band noise is more obvious in the K3 because the low frequency
> audio is restricted causing the noise to be distributed over a more narrow
> range. This lack of bass tends to induce for ear fatigue.
> Steve Ellington
> n...@carolina.rr.com
> - Original Message -
> From: "ab2tc" 
> To: 
> Sent: Sunday, April 05, 2009 4:42 PM
> Subject: Re: [Elecraft] My K3's hissy and noisy audio
>>
>>
>> Hi all,
>>
>> In my view the only "problem" with the K3 being "hissy" is the AGC
>> threshold. On 20m and below even with AGC threshold set to the maximum
>> (008), just the atmospheric noise is at or above the threshold and this is
>> indeed tiring to listen to. I solve the problem by turning down the RF
>> gain; I notice many others instead turn the AGC slope way up (actually low
>> number), which has a similar effect for strong signals. Very high on my
>> wish list is for at least another 5dB increase in the AGC threshold. The
>> present range 002-008 is just not enough.
>>
>>
>>>Sorry to pop this balloon but I'm in Arizona, USA and I concur.
>>
>>
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>>
>> -
>> AB2TC - Knut
>> --
>> View this message in context:
>> http://n2.nabble.com/My-K3%27s-hissy-and-noisy-audio-tp2588008p2590003.html
>> Sent from the Elecraft mailing list archive at Nabble.com.
>>
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Re: [Elecraft] K3 Power levels

[Stewart Baker]

Hi Dave,
No it's not the spike problem. 
I think that it is close to the "tune then creep up in power" issue.
It only seems to be a problem when the KPA3 is selected.
The power output on either a whistle or using the 2 tone oscillator is low on 
SSB, and 
hitting the key puts the power back up. However, the increased/restored power 
level is
nowhere near as stable or repeatable as I would like. Bands above 40m seem 
unaffected.

73
Stewart G3RXQ
On Mon, 30 Mar 2009 17:53:19 +0100, Dave G4AON wrote:
> I am also using the latest beta (3.04) and don't find the power level on
> SSB swings much, it was also OK in that regard with the previous beta
> (3.03). The firmware between v2.38, which as fine, to the last two
> suffered badly from short duration spikes on SSB, these spikes could be
> readily produced by scratching a microphone grille or sibilants in speech.
>
> My drive levels are typically 23~25 Watts to an Acom 1000 linear.
>
> Is this the same "tune then creep up in power" issue as noted by others,
> or a general tendency to create high power spikes?
>
> 73 Dave, G4AON
> ===
> Spent a few hours in WPX SSB, but gave up as power levels from my K3
> were all over the place.
> My linear did not appreciate the wild input power swings. Back to the
> bad old days.
> Using the latest beta. Hope this problem gets fixed soon.
>
> 73
> Stewart G3RXQ


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[Elecraft] K3 Power levels

[Stewart Baker]

Spent a few hours in WPX SSB, but gave up as power levels from my K3 were all 
over the place.
My linear did not appreciate the wild input power swings. Back to the bad old 
days.
Using the latest beta. Hope this problem gets fixed soon.

73
Stewart G3RXQ
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Re: [Elecraft] Alaska Volcano pix

[Stewart Baker]

Ugh !
Just booked an Alaskan cruise...
Do we need to take hard hats ?

73
Stewart G3RXQ

On Sat, 28 Mar 2009 12:59:40 -0400, ron wrote:
> Jim Wiley wrote:
>> This is very OT, to be sure, but perhaps interesting to some of 
you:
>>
>>
>> For those of you who haven't  already discovered this, there 
are some
>> really awesome photos of the Mt. Redoubt volcano and it's 
surrounding
>> area on the Anchorage Daily News web site, including eruption 
photos and
>> pictures of ashfall.
>>
>> go to:  http://www.adn.com/ (The Anchorage Daily News 
web-site)
>>
>>

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Re: [Elecraft] K3 - Transverter/HF

[Stewart Baker]

On Sun, 8 Mar 2009 15:22:39 -0700, wayne burdick wrote:
>
> You would have to use the AUX RF input for the sub RX in this case
> (because the "MAIN" path is connected to the transverter IN jack on the
> KXV3). Hold BSET, then tap ANT to switch the sub from MAIN to AUX.
> "AUX" can be either the non-transmit KAT3 jack or the AUX RF BNC jack,
> depending on how your sub receiver is wired.
>
>That's what I was afraid you would say. I don't use the AUX RF input as I like 
>to 
maintain either the ANT1/ANT2 or RX ant path for both the MAIN and SUB RX's
on HF.
>
> If the main RX is listening on 80 m, then the KXV3's XVTR IN jack is
> not available to the sub. You would have to bring the transverter
> signal in to the sub's AUX RF BNC jack. You could use a "Y" cable to
> route the transverer signal to both XVTR IN and AUX RF.
>
>I don't suppose the Y cable would be a satisfactory solution if used with the 
>RX ANT.

>> Further, when I tune the Sub RX the display
>> changes from a 2m to the I/F frequency.
>
> I thought I had fixed that in the most recent code (2.99). Is that what
> you're using?

>I was using 2.94, however I now have 2.99, so will try that.

73
Stewart G3RXQ


> tnx
> Wayne
> N6KR
>
>>
>> What's going on ?
>>
>> 73
>> Stewart G3RXQ
>>
>>
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>
> ---
>
> http://www.elecraft.com


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[Elecraft] K3 - Transverter/HF

[Stewart Baker]

I don't know if I am trying to do the impossible, wanting to 
listen on 2m and 80m simultaneously.

I have a homebrew 2m transverter connected via the KXV3 with a 
28MHz I/F setting.

If I set up 2m on Main RX , then I cannot get anything out of the 
Sub RX when set to 80m.

If I set up 80m on Main RX , then I cannot get anything out of the 
Sub RX when set to 2m. Further, when I tune the Sub RX the display 
changes from a 2m to the I/F frequency.

What's going on ?

73
Stewart G3RXQ




 
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[Elecraft] K3 - scanning transverter frequencies

[Stewart Baker]

Having just completed a home brew 144MHz - 28MHz transverter, I 
thought that I would set the K3 scanning to monitor repeater 
output frequencies.

Although I have used scanning successfully on other bands, all I 
get is "Scan N/A".

What am I doing wrong ?

73
Stewart G3RXQ
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Re: [Elecraft] K3 -> SteppIR comm problem

[Stewart Baker]

Jim,
I have mine hard connected the way you describe and it
communicates OK with my K3 at 38.4kB with KENW mode.
As has been said before AUTO INF=1 and SteppIR in General Mode.

73
Stewart G3RXQ
On Mon, 9 Feb 2009 12:37:42 -0500, Jim Spears wrote:
> I should have pointed out that the specific problem I am trying
to solve now is a hard connect from K3 RS232 port to SteppIR Data
In port.  No Y cable, no PC based software involved.  I am not
convinced that the SteppIR is “listening”.
>
>
>
> Jim
>
> N1NK


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Re: [Elecraft] K3 - AFSK A

[Stewart Baker]

Hi Lyle,
Thanks for your reply. A bit more investigation shows that 
switching between AFSK A, DATA A, USB or LSB makes no difference 
as far as the frequency offset is concerned.

What does make a difference is switching between Digital mode and 
CW/SSB in N1MM...
In non Digital Modes the K3 VFO frequency display corresponds 
exactly with the Bandmap for any K3 mode selected.

However, it appears that in the Digital modes N1MM offsets the K3 
carrier frequency whilst showing the correct Mark frequency on the  
Bandmap and MMVARI cursor.

Or, I think that is what is happening... My brain hurts !

73
Stewart G3RXQ
On Mon, 09 Feb 2009 07:11:25 -0800, Lyle Johnson wrote:
> Hello Stewart!
>
> Be sure you use the PITCH control to select the tone pair you 
desire to
> use. The K3 will then display the RF frequency corresponding to 
the RTTY
> Mark tone.  As you change pitches, the frequency display won't 
alter but
> the offset of the radios suppressed carrier will move in 
accordance with
> the selected PITCH.
>
> If you engage the dual tone RTTY filter, it will be set up for 
the
> selected PITCH.
>
> Be sure the RTTY program is set to the same pitch.  Some 
programmes are
> waterfall-based and change the Tx tones to match the Rx tones. 
 If you
> are using such a program, you may be better off with DATA A, and 
if you
> want LSB then hold ALT to change sidebands for DATA A so that 
you see
> the LSB icon. IN thie case of using DATA A, the radio will 
display the
> suppressed carrier frequency rather than the MARK frequency.
>
> 73,
>
> Lyle KK7P


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[Elecraft] K3 - AFSK A

[Stewart Baker]

I have been busy setting up MMVARI together with N1MM to use in 
RTTY contests. I have not encountered any real problems, however I 
am a little confused when it comes to using the K3 in the AFSK A 
mode.

I am using this mode because it always has the RTTY LSB selected 
as default. The audio tones are fed into the K3 via the LINE IN.

In the Data Mode section of the K3 Owners Manual it says:-
AFSK A also uses Audio-shift transmit, but is optimized for RTTY.

The VFO displays the RTTY Mark frequency, and LSB is "normal".

I am not seeing the Mark frequency displayed on the VFO, but one 
which seems to represent the suppressed carrier. The displayed 
frequency is offset from the Mark frequency by about 1.3 kHz. 
This would correspond with the middle of the K3 filter passband.

It would be nice to display the real (yes I know it's audio) Mark 
frequency as this seems to be a standard.

a) Am I missing something in my K3 setup ?
or
b) The manual is wrong ?
or
c) Something else ?

73
Stewart G3RXQ
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Re: [Elecraft] K3-EZ Software

[Stewart Baker]

Does it for me as well.
A very useful program.

Stewart G3RXQ
On Fri, 6 Feb 2009 06:18:36 -0800 (PST), Lee Buller wrote:
> While exploring the Elecraft site, I discovered K3-EZ Software 
by Bill Coleman.  See it at:
>
> http://home.roadrunner.com/~n2bc/SW.htm
>
> Now, I have no vested interest in the program, but I found it to 
be quite useful and highly recommend it.  I spend some time 
adjusting the RX equalizer and found that it is quite effective to 
my hearing loss.  It is quite amazing how you can bring up the 
highs and cut out the lows.  I have yet to deal with the TX 
equalizer.  The program seems to give me all the information about 
the K3 I need and allows me to make changes without digging 
through the menus.  Also, it will allow you to load the memories.  
Other programs are good too, but it seems that Bill's program goes 
into the depth of the rig more than others.
>
> One thing I would recommend to the user is to use a high baud 
rate than 4800.  The program goes out and changes settings and at 
4800 baud it can be quite slow.
>
> Let me also say, I have about three or four programs on my 
computer which talks with the K3 and they are all good...Bill's 
seems to go (as I said) into the "soul" of the K3
>
> Lee - K0WA
>
>
> In our day and age it seems that Common Sense is in short 
supply. If you don't have any Common Sense - get some Common Sense 
and use it. If you can't find any Common Sense, ask for help from 
somebody who has some Common Sense. Is Common Sense divine?


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[Elecraft] Elecraft Web Site - Speed

[Stewart Baker]

I am now able to get fast access the Elecraft site.
Back up to Warp Factor 10...
Don't know why this is, must be the snow melting !

73
Stewart G3RXQ
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Re: [Elecraft] Elecraft Web Site - speed

[Stewart Baker]

Thanks to all who replied.
I have now tried it with 3 PC's here, and get the same result.
So unless they all have the same virus etc the problem looks ISP'ish.

The strange thing is that other US based sites such as Telepost and NASA
load at full speed.

I will get a friend who is with another ISP to try.

73
Stewart G3RXQ

On Tue, 3 Feb 2009 17:54:28 GMT, Stewart Baker wrote:
> Is it me, or is the Elecraft site very slow to load.
> At present it is a bit like kick starting a Snail.
>
> Stewart G3RXQ
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[Elecraft] Elecraft Web Site - speed

[Stewart Baker]

Is it me, or is the Elecraft site very slow to load. 
At present it is a bit like kick starting a Snail.

Stewart G3RXQ
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Re: [Elecraft] [K3] K3 owner in spe

[Stewart Baker]

In which case you will also require the AM & FM filters.

73
Stewart G3RXQ
On Mon, 2 Feb 2009 17:24:22 +0100, Kjeld Holm wrote:
> Dear Stewart
>
> Would like to be ready for any mode that the DX will be running 
when the
> band is open and I am QRV.
>
> Vy 73
> OZ1CCM Kjeld
>
>
> -Original Message-
> From: Stewart Baker [mailto:stew...@baker.nildram.co.uk]
> Sent: 2. februar 2009 17:16
> To: Kjeld Holm; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [K3] K3 owner in spe
>
> Dear Kjeld,
> You don't say what modes you are intending to operate.
>
> I have removed all the extra filters from the list as I have 
found the
> standard filter offering from Elecraft to be up to the job on 
both SSB and
> CW. However, you might consider adding a 400Hz filter for CW if 
that is your
> main interest.
>
> The frequency stability of the K3 is excellent, so no need for 
the high spec
> oscillator.
>
> I have added a Heil headset, as although I have a love/hate 
relationship
> with mine with regard to comfort, and it is way too expensive, 
it does work
> well.
>
> So this is my list...
> K3/100-F (100 W Transceiver
> KPA3-F (ATU 100W)
> KRX3 (Subreceiver)
> KUSB (USB)
> KDVR3 (Digital Voice Recorder)
> KXV3 RX Ant
> Heil Pro Headset
>
> Hope that this helps.
>
> 73
> Stewart G3RXQ


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Re: [Elecraft] [K3] K3 owner in spe

[Stewart Baker]

Dear Kjeld,
You don't say what modes you are intending to operate.

I have removed all the extra filters from the list as I have found 
the standard filter offering from Elecraft to be up to the job on 
both SSB and CW. However, you might consider adding a 400Hz filter 
for CW if that is your main interest.

The frequency stability of the K3 is excellent, so no need for the 
high spec oscillator.

I have added a Heil headset, as although I have a love/hate 
relationship with mine with regard to comfort, and it is way too 
expensive, it does work well.

So this is my list...
K3/100-F (100 W Transceiver
KPA3-F (ATU 100W)
KRX3 (Subreceiver)
KUSB (USB)
KDVR3 (Digital Voice Recorder)
KXV3 RX Ant
Heil Pro Headset

Hope that this helps.

73
Stewart G3RXQ

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[Elecraft] K3_EZ Software

[Stewart Baker]

Hi,
Recently I have been trialing K3_EZ software from Bill N2BC.

Its features include: Band stack Registers, Frequency Memories, an 
Equalizer Manager and a Configuration Helper.

Great software, well worth a look..

73
Stewart G3RXQ
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Re: [Elecraft] K3 KRX3

[Stewart Baker]

Hi Barry,
Do make sure that BOTH connectors between the Front Panel and DSP
boards are mated. If you have the connector with the single row of
pins out of it's socket then the Front Panel mic socket will not
work.

So far, I have managed to achieve this TWICE !

73
Stewart G3RXQ

On Thu, 22 Jan 2009 09:46:19 -, Barry Simpson wrote:
> I have just completed the installation of a  KRX3 into my K3. I
found the installation process difficult but after a minor hiccup
with the synthesiser calibration – I had to reload the firmware –
it is working fine and appears to perform exactly the same as the
main receiver.
>
>
>
> However the bad news is that the front panel microphone socket
is no longer operative although the rear microphone connector
works fine. And yes I have tried the various menu settings but to
no avail.
>
>
>
> It would seem that all the plugging and unplugging has disturbed
or broken one of the microphone socket connections. Before I start
delving into the rig again has anyone any suggestion where the
problem might lie. I seem to recall someone else having a similar
problem after installing the KRX3.
>
>
>
> Any input would be appreciated.
>
>
>
> Barry Simpson  VK2BJ


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[Elecraft] K3 Sub RX Independence

[Stewart Baker]

We're getting closer !
I see that the latest Errata for the KRX3 manual (12/1/09) 
includes operating instructions for when the Main and Sub 
receivers become fully independent .

Maybe there should be a day named after the event... :-)

73
Stewart G3RXQ

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Re: [Elecraft] [K3] front mic not working after subRx install

[Stewart Baker]

Mike,
Make sure that BOTH connectors between the front panel  and DSP 
boards are mated. If you leave the one with the single row of pins 
unmated you will get the problem of the front mic socket not 
working.

Trust me - I have done this TWICE !!!

73
Stewart G3RXQ
On Mon, 12 Jan 2009 15:18:38 -0800, Mike Scott wrote:
> I installed the second receiver in my K3 and at the same time 
made the
> prescribed audio and line out modifications.
>
> After checking out the receiver my microphone is now dead using 
the front
> panel. Rear connection works okay. I have been using the front 
panel
> microphone connector without a hitch up until the time I went 
off line to
> make the above modifications.
>
> So has this happened to anyone else and is there something 
obvious before I
> start taking covers off?
>
> One thing to note, I did have a problem with the SubRx install. 
The Sub-In
> and Sub-Out board connections to the SubRx are very difficult to 
tell when
> they are mated correctly as most of the pins are not visible. I 
apparently
> ended up with an improper mating and smoked the sub-out board. A 
quick call
> to Elecraft identified the problem and a new sub-out board put 
me on the air
> after a very careful inspection of the connectors this time. I 
am wondering
> if the sub-out is the only thing that I smoked now. The 
microphone-audio
> path seems quite remote from all this activity but I don't know 
what sneak
> paths I might have created with a misconnected sub-out 
connection.
>
> I checked microphone gain (it is set at 30 with front 
panel-high, no bias),
> just as it was before this problem arose. Those mic settings 
work well for
> the rear connector using the same microphone. I use one of those 
Kenwood
> adapters to audio plugs that came with a microphone and the 
microphone has a
> dynamic element.
>
> Mike Scott - AE6WA
> Tarzana, CA (DM04 / near LA)
> K3-100 #508/ KX1  #1311
>
>
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Re: [Elecraft] Re: k3 SWR readings seem generous

[Stewart Baker]

I need a little more RF tickling the spider's legs to get them to
move off the open wire feeder :-)

Stewart G3RXQ
On Sat, 03 Jan 2009 21:22:49 -0500, p...@n4lcd.com wrote:
>
>>"I always use 5W, ... when I tune up my external ATU."
>
> I have my K3 set to use 0.2 Watt for tuning my external LDG
tuner as
> it will theoretically tune with 0.1 Watt.
>
> Works great.
>
>
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Re: [Elecraft] Re: k3 SWR readings seem generous

[Stewart Baker]

On Sat, 3 Jan 2009 08:58:57 -0600, Phil & Debbie Salas wrote:
> "Hot switching RF in an external ATU is not to be recommended
for
> any radio at any level."
>
> BUT - you DO hot-switch your K3's RF output when using any
relay-based
> auto-tuner, including the internal K3 auto-tuner.  So my
reasoning is that
> I'd rather hot-switch the 100-watt PA at 15 watts rather than
the 10-watt PA
> at 5 watts.  And then, my MFJ-998 (which I use with my ALS-600)
reads SWR
> more accurately at 15 watts than it does at 5 watts, so when I
go to full
> power the tuned SWR is still minimum.  As Wayne stated earlier,
SWR readings
> at low power may be less accurate due to the detector diode
voltage drop at
> low power.
>
> Phil - AD5X
>
OK, to be strictly accurate..

"Hot switching RF in an external ATU (other than auto-tuners
designed to be operated that way) is not to be recommended for
 any radio at any level."

I am sure that the *internal* K3 ATU has been designed to perform
its tuning function at a safe power level, whatever output power
level the operator selects.

Using the LP-100A I am avoiding (for the present) the influence
detector diode volts drops vs power have on my SWR measurements.

Stewart G3RXQ

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Re: [Elecraft] Re: k3 SWR readings seem generous

[Stewart Baker]

On Sat, 3 Jan 2009 07:34:13 -0600, Phil & Debbie Salas wrote:
> "I always use 5W, ... when I tune up my external ATU."
>
> Actually, I use 15 watts for tuning both the internal K3 tuner,
as well as
> my external MFJ-998 tuner.  I do this for two reasons:
>
> 1)  I get much better SWR agreement between 15 watts and full
power than I
> do with 5 watts and full power, especially on the external
tuner.
>
> 2)  I figure that using a switching-type tuner stresses the
10-watt output
> circuitry of the K3 at 5-watts tune power (all that
hot-switching).  But at
> 15 watts, the K3 100 watt PA should have plenty of margin.
>
> It might be interesting to know what power levels Elecraft
recommends
> regarding radio stress during tuning.
>
> Phil - AD5X
>
With my setup.
a) I use 5W which gives an accurate VSWR reading on the LP-100A.

b) A power level of  5W keeps the potential QRM level to a
minimum. Of course radiating no tune up power would be best.

c) I am sure that the K3 10W PA would stand 5W for a 30 second
tune..

d) I pre-tune my homebrew fully balanced ATU prior to pressing the
TUNE button. No live RF switching is involved.

Hot switching RF in an external ATU is not to be recommended for
any radio at any level.

Stewart G3RXQ
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Re: AW: [Elecraft] Isolation between Ant 1 and 2??

[Stewart Baker]

I would consider that figure acceptable.

With my K3 the isolation between ANT1 and ANT2 is 42dB worst case,
56dB Max.

Moving the single wires around made no difference. I suspect that
the level of isolation is determined by the ATU PCB layout.

Given the size of that board I think that the isolation obtained
is reasonable.

73
Stewart G3RXQ

On Sat, 3 Jan 2009 13:43:21 +0100, Koppendorfer Klaus wrote:
> yes isolation between ant1 and ant2 is very bad...
> if I have time I try to change the silgle wires from the rs323
ports to the atu-board to koax wires, maybe this will help a
little
>
> 73
> OE6KYG
> KX1 244
> K2 1331
> K3 115
>> -Ursprüngliche Nachricht-
>> Von: elecraft-boun...@mailman.qth.net [mailto:elecraft-
>> boun...@mailman.qth.net] Im Auftrag von Dick Roth, KA1OZ
>> Gesendet: Samstag, 03. Jänner 2009 06:14
>> An: Elecraft Reflector
>> Betreff: [Elecraft] Isolation between Ant 1 and 2??
>>
>> Hello and Happy New Year!!
>>
>> Was doing some testing and discovered Ant 1 signal on Ant 2.
 Ant 1 is
>> my GAP Titan-DX and Ant 2 is a 100W dummy load.
>>
>> I was just reading the mail on 75 meters and switched to Ant 2
to test
>> power.  When key was off, I heard part of the QSO that was
going on.
>> While on my dummy load, I was receiving a station S3, which on
Ant 1 was
>> 20 over S9.
>>
>> Has anyone else seen this crosstalk?  If so, what is considered
>> "acceptable"?
>>
>> --
>> 73,
>> Dick ka1oz
>> Middleborough, MA
>>
>> Radio:  Elecraft K3/100(Kit) SN 859
>> Antenna:  Titan-DX
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[Elecraft] Re: k3 SWR readings seem generous

[Stewart Baker]

No problem Wayne.
I always use 5W, and the LP-100A when I tune up my external ATU.

73
Stewart G3RXQ

On Fri, 2 Jan 2009 10:01:08 -0800, wayne burdick wrote:
> Stewart Baker wrote:
>
>> The K3 output was from ANT1 using the internal ATU. The ATU was
>> automatically tuned to 1:1 on all bands.
>> The results I got for 2:1 VSWR are as follows:-
>>
>>LP-100K3
>> 160 1.991.8
>> 80   1.991.8
>> 60   1.991.8
>> 40   1.951.8
>> 30   1.971.6
>> 20   1.971.4
>> 17   1.971.3
>> 15   1.961.2
>> 12   1.961.5
>> 10   1.961.4
>
> Much of this could be attributed to the different locations of
the two
> bridges (see my previous email). Strays will vary from band to
band.
>
> Also, the K3's bridge will be a little more accurate at 100 W
than at
> 10 W due to the bridge diode drops. I compensate for this to
some
> degree in firmware, and I'll review it when I get a chance.
>
> 73,
> Wayne
> N6KR
>
> ---
>
> http://www.elecraft.com


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Re: [Elecraft] k3 SWR readings seem generous

[Stewart Baker]

This thread came at the right time. I have just finished
re-calibrating my LP-100A. I did this after having used the unit
for 6 months, however the calibration was very close to the
original settings.

Then I thought that I would check my K3 SWR indication.
The results are not as good as I would expect.

I set the K3 with a tune power of 10W, representing  the level of
power one might use to adjust an ATU.

The measurements I made were using 2 x 8 inch lengths of RG8U from
the K3 into the LP-100A coupler, and then from the coupler into
the dummy load.

The dummy load is a precision 100W one which I measured with a VNA
and has a VSWR of <1.03 from 1 to 30 Mhz. To simulate a 2:1 VSWR
I used another dummy load (not quite as good) in parallel.

The K3 output was from ANT1 using the internal ATU. The ATU was
automatically tuned to 1:1 on all bands.
The results I got for 2:1 VSWR are as follows:-

LP-100  K3
160 1.991.8
80   1.991.8
60   1.991.8
40   1.951.8
30   1.971.6
20   1.971.4
17   1.971.3
15   1.961.2
12   1.961.5
10   1.961.4

As can be seen my K3 SWR indication constantly under reads.
However, it really gets bad on 20,17 & 15.

I will be interested in the results of others conducting similar
tests.

73
Stewart G3RXQ   

On Thu, 1 Jan 2009 17:47:04 -0800, Mike Scott wrote:
> I have been working on antennas today and have a puzzle. I am
finding that
> the K3 SWR indications are unbelievable generous.
>
> With my 40M inverted V fed with RG8X (50 ohm) coax I see that
the K3 seems
> generous in the SWR indication on tune with ATU bypassed. I have
noticed a
> slight change in SWR with K3 power setting so the following was
taken with
> K3 tune power set to 100 watts. If I set it to 10 watts the
discrepancy is
> greater...
>  SWR SWR SWR
> Freq. K3  VA1 Daiwa
> 7.00 MHz 1.3  1.922.0
> 7.05 MHz 1.2  1.921.9
> 7.1 MHz  1.2  1.981.95
> 7.15 MHz 1.3  2.262.1
> 7.2 MHz  1.9  2.602.3
> 7.25 MHz 1.5  2.882.6
> 7.3 MHz  1.6  3.322.7
>
> The Daiwa is the CN-101L cross needle meter. The VA1 is the
Autek Rx Vector
> antenna analyzer.  The VA1 does not have a tuned input so it is
possible
> that it can be fooled by local broadcast stations. I don't
suspect this
> issue here as there aren't any close by broadcast stations that
I am aware
> of. The Daiwa and the VA1 tend to agree pretty well anyway. The
K3
> measurements are the outliers. This antenna on a "Tenna Dipper"
shows
> minimal SWR at 7.040 MHz, just where I tuned it a few years ago.
The LED
> does not extinguish indicating higher than 1:1 SWR at the
minimum. If you
> look at the numbers, I guess I don't believe the K3, Do you
think my antenna
> is below 1.6 to 1 across the entire 40M band?
>
>
> So now on to 20M dipole fed with RG58 (50 Ohm Coax)...
> The Tenna Dipper fully extinguishes at 13.805 MHz indicating
that my antenna
> is bit too long but is close to 1:1 at that frequency.
>
> FreqK3 VA1 Daiwa
> 13.81   -- 1.12--
> 14.0 MHz1.11.241.31
> 14.1 MHz1.11.301.70
> 14.2 MHz1.11.551.85
> 14.3 MHz1.21.691.85
>
> RG58 may have some losses on this band so perhaps all of the SWR
indications
> are generous, some more than others. The dipole is a low one and
probably
> isn't 72 ohms at the feed point.
>
> Mike Scott - AE6WA
> Tarzana, CA (DM04 / near LA)
> K3-100 #508/ KX1  #1311
>
>
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Re: [Elecraft] K3 Firmware Rev. 2.76: No AF noise burst; PRE/ATTN independent for sub RX; etc.

[Stewart Baker]

On my K3 there is still quite a loud speaker 'pop' with Power On
and Off after loading firmware revision 2.76.

Looking at the NS data sheet for the audio amplifier IC shows that
it has click suppression built in. The length of the suppression
period is determined by the value of the capacitor on the Bypass
connection.The value of the bypass capacitor is related to the
input coupling capacitor.

 On the K3 cct diagram this is shown as a 0.47uF, which suggests a
10uF be fitted to the Bypass connection to give a click mute
period of 0.4S. However, the K3 cct diagram shows a 3.3uF fitted,
which gives only 0.12S.

Any benefit increasing the value to 10uF ?

73
Stewart G3RXQ
On Tue, 23 Dec 2008 10:37:46 -0800, wayne burdick wrote:
> K3 beta-test firmware revision 2.76 (with DSP rev 1.98) is now
> available. See release notes below.
>
> Please send any problem reports to k3supp...@elecraft.com. For
> instructions on how to load beta firmware, please see:
>
> http://www.elecraft.com/K3/k3_software.htm
>
> 73,
> Wayne
> N6KR
>
> * * *
>
> MCU 2.76 / DSP 1.98, 12-21-2008
>
> * POWER-ON AF NOISE BURST:  This should now be eliminated.
>
> * DIGIT 2 SWITCH TONE FEEDBACK RESTORED. The '2' key on the
numeric
> keypad now provides tone feedback when used for numeric entry or
within
> menu entries. There's no tone when it's used as "REV" (temporary
A/B VFO
> reverse).
>
> * SSB TX AFTER VFO A/B SWAP: Transmit filter settings are now
correct
> after any A/B swap, regardless of the modes of VFO A and B. This
had
> been
> noted by some customers as a problem on power-up, but it could
occur
> anytime the VFOs were in different modes at the time of an A/B
swap.
>
> * INDEPENDENT PREAMP AND ATTN FOR SUB RECEIVER: The preamp
> and attenuator settings for the receiver are now independent of
main.
> On each band, you can set up the sub's preamp/attenuator as
desired
> using BSET. The sub's preamp/attenuator are separate even in
diversity
> mode, where you'll often be using a lower-gain antenna for the
sub
> receiver.
> Note: A second tap of A>B within the 2-second window still
copies all
> main receiver settings to the sub, including preamp and
attenuator.
>
> For software developers:
>
> * "FR0" COMMAND (SPLIT CANCEL): Now correctly restores the VFO A
arrow
> icon.
>
> * CONFIG:KPA3 MENU ENTRY: The parameter for this menu entry is
now
> accessible via the "MP" command.
>
> * "FA"/"FB" commands and loss of PLL lock: Large FA/FB frequency
steps
> were, on rare occasion, causing loss of PLL lock. This has been
> corrected.
>
> * Added "PA$" (sub RX preamp) and "RA$" (sub RX attenuator)
commands.
> This is in conjunction with the sub preamp and attenuator
settings now
> being independent of main (see above). During BSET, both return
"?;"
> at present.
>
>
> ---
>
> http://www.elecraft.com
>
>
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[Elecraft] K3 - VCO Calibration temperature

[Stewart Baker]

Following the thread concerning PLL errors on the higher frequency
bands, I decided to run a check on my K3.

I found that at a FP temp of over 38deg, I got a PLL2 error
message.

I then implemented the mod that Wayne recently posted in which a
180k resistor shunts R10 to give 56k. This cured the problem, and
I have now implemented the mod on both Synth1 and Synth2.

Before  I re-ran the CAL for both VCO's,  I looked to see at what
approximate temperature this should be carried out. I could find
nothing in the manual.

My thought are, to get the best VCO temperature tracking that the
CAL should be carried out at the mid point of operating
temperature range.

Is this correct, or doesn't it matter ?

73
Stewart G3RXQ
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RE: [Elecraft] K3 VFO A tension

[Stewart Baker]

I got fed up with the felt hiss, so I made a couple of new washers
from a finer grade of felt. This was obtained from the wife's
sewing stock at little (YOU cook the meal tonight) cost..

73
Stewart G3RXQ
On Sun, 21 Dec 2008 20:50:14 -0800 (PST), VK5ABQ wrote:
>
> I was annoyed by the felt on felt hiss generated by rotation of
VFO A and
> took about six attempts to find a compromise between hiss and
rotation
> damping. Ideally I would prefer it to rotate less easily though.
>
>
> -
> Shane
> K3/10: S/N 2127, KBPF3, KFL3B-FM, KFL3A-6K, KFL3A-2.8K,
KFL3A-400, KTCXO3-1
> & KXV3.


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Re: [Elecraft] K3 - 2.73/1.98 Clicks on Power On

[Stewart Baker]

That should take care of it

T.I.A.

73
Stewart G3RXQ
On Fri, 12 Dec 2008 12:47:29 -0800, Eric Swartz - WA6HHQ, Elecraft
wrote:
> Hi Mike,
>
> It is. This is something that doesn't show up all the time so we
were
> not aware of it until it was noted here on the list recently.
>
> We're adding an additional power on mute time delay to the
firmware
> right now.
>
> 73, Eric
>
> Mike Scott wrote:
>> The power on rush of noise is almost earsplitting here in
headset and
>> external speakers, K3 serial 509. It lasts for about a quarter
of a second.
>> If I had the volume turned up it could cause damage to a
speaker or my ears,
>> it is that loud. For this reason alone it should be a high
priority fix.
>> Perhaps just blank the receiver in the turn on sequence for
enough time to
>> cover the transient.
>>
>> It has existed over the last several firmware updates. I notice
that it is
>> worse when the bandwidth is set wider such as 2.7 KHz SSB mode.
It does not
>> matter if a signal is present or not. I have high background
noise level
>> here (S-7) so I expect that might be equivalent to having a
signal present.
>>
>> When set for CW at 400 Hz the momentary noise is there but
much-much subdued
>> and not objectionable at all so CW operators may not notice the
effect. The
>> effect is there in SSB/Data/CW modes. I don't hear it in
AM/13KHz.
>>
>>
>> Mike Scott - AE6WA
>> Tarzana, CA (DM04 / near LA)
>> K3-100 #508/ KX1  #1311
>>
>>
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[Elecraft] K3 - 2.73/1.98 Clicks on Power On

[Stewart Baker]

Hi,
Since installing MCU 2.73. I have noticed that power on is
accompanied by a number of loud, rather unpleasant clicks/clunks
from the speaker.

73
Stewart G3RXQ
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Re: [Elecraft] Re: K3 Beta firmware rev. 2.72: updated DVR support, etc.

[Stewart Baker]

Lyle,
The high priority being given to the SUB IND is great news.
 I suspect that a number of K3 users are already tuned in :-)

73
Stewart G3RXQ
> Having the Sub Rx work on a different band than the Main is a
very high
> priority work in progress.  Stay tuned...
>
> 73,
>
> Lyle KK7P
>
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[Elecraft] K3 TX Audio from LINE OUT V2.72/V1.98

[Stewart Baker]

Nice firmware addition, works well.

Thanks Guys.

73
Stewart G3RXQ
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Re: [Elecraft] UK Elecraft net report for Sunday 23rd November

[Stewart Baker]

Using a pair of small Creative (non amplified) computer speakers,
and the audio quality from the K3 is excellent.

I must be very lucky, I can't hear any of the birdies listed.
My K3 has the 2nd RX, however I took no special care in the
routing of the signal cables.

73
Stewart G3RXQ
On Sun, 23 Nov 2008 14:25:20 +, Dave G4AON wrote:
> We had another busy and interesting net this week. I never fail
to be
> amazed at how we manage to find useful subjects that are
Elecraft
> related each week!
>
> Main topics were:
>
> External speakers, for anyone interested mine came from Argos
> (http://www.argos.co.uk/), part number 513/6113, Acoustic
Solutions in
> black that are 9.5" tall by just over 5.5" wide - cost £19.99 a
pair. I
> tried Richer Sounds for their offer on Eltax Concept mini
speakers at
> £9.99 a pair, but they wouldn't sell them for cash without
having my
> name and address "for the receipt", which in reality was for
junk mail
> purposes, so they were left in the shop.
>
> "Birdies" on the K3 as noted following a firmware update. The
general
> view was it had nothing to do with firmware updates. The
frequencies
> mentioned were 21.022, 14.324, 7.160 and 3.580. I pick up all of
those
> except the 21 MHz one. The strongest is 3.580.
>
> Power Poles, love them or hate them they are used in the K2/100
and K3!
> CPC in the UK stock them, when I checked they were listed as of
USA
> origin perhaps misprinted as "unbranded". Part number 21-3300,
CPC are
> at: http://cpc.farnell.com/
>
> Noise reduction and roofing filters... Narrow filters give worse
noise
> reduction performance. Interesting observations by Doug, GM0ELP,
on how
> much of an issue it can be at times and how much better noise
reduction
> works with a wider filter. He's going to see if Lyle or Wayne
can
> include manual filter selection as an option.
>
> Observations that the KXV3 isn't needed if you just want to use
the IF
> out, it can be taken from the main RF board to a single hole
fixing BNC
> socket fitted to the KXV3 blanking plate. Saves a lot of
money... See
> the KXV3 diagram/fitting instructions.
>
> Clifton Labs K2 IF buffer kit.
>
> Power supplies, Voltage drop and fitting modules to the K3
(remember to
> exit the menu and power off for the module to be recognised).
>
> Schurr Profi and other paddles, including the Hex key and
Begali. An
> interesting point was raised that apparently there are three
different
> makers of the Profi paddles and they are all based on the same
design!
>
> Stations this week were:
> G0VGS, Ian
> G4LWA, Alan
> G7BQM, Ted
> GM0ELP, Doug
> G8FMH, Alan
> M3WCK, Colin
> G4NWJ, Jim
> G4LOP, Chris
> MM0XDG, David
> GI4FZD, Paul
>
> 73 until next week.
> Dave, G4AON
> K3/100 #80, Acom 1000, dipole
>
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Re: [Elecraft] K3 Main and Sub Receiver differences

[Stewart Baker]

I noticed this as well, hope that it gets sorted soon..

73
Stewart G3RXQ
On Thu, 20 Nov 2008 17:19:27 -0800 (PST), Barry N1EU wrote:
>
>
> N5WNG wrote:
>
>> The question is does the RX EQ get applied to both receivers?
>>
> No, with the current firmware, RX EQ is only applied to the main
rx.  I'm
> sure this limitation will eventually be lifted.
>
> 73,
> Barry N1EU


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Re: [Elecraft] K3 Beta firmware rev. 2.67: Main/Sub AF balance control; AGC-off AF limiter

[Stewart Baker]

Seconded...
Just what the 2nd RX needed.

73
Stewart G3RXQ
On Wed, 19 Nov 2008 09:37:53 +0100, Alexandr Kobranov wrote:
> Excellent job, Wayne!
> SUB/MAIN ballance and easy ANT switching is really big
improvement!
>
> Many thanks,
>
> Lexa, ok1dst
> with still growing K3/10 :-)
>
>
> wayne burdick napsal(a):
>> K3 beta-test firmware revision 2.67 (with DSP rev 1.96) is now
>> available. Please send any problem reports to
[EMAIL PROTECTED]
>> For instructions on how to load beta firmware, please see:
>>
>> http://www.elecraft.com/K3/k3_software.htm
>>
>> Full details appear below.
>>
>> 73,
>> Wayne
>> N6KR
>>
>> * * *
>>
>> MCU 2.67 / DSP 1.96, 11-18-2008
>>
>> * MAIN/SUB BALANCE CONTROL:  If CONFIG:SUB AF is set to
BALANCE,
>> then the SUB AF GAIN control becomes a main/sub AF balance
control when
>> the sub receiver is turned on (including diversity mode). In
this case
>> the MAIN
>> AF GAIN controls the AF gain level for both receivers. When SUB
AF is at
>> 12 o' clock, both receivers will be at full volume (main left,
sub
>> right). If SUB AF
>> is rotated fully counter-clockwise, you'll hear only the main
receiver.
>> If it's
>> rotated fully clockwise, you'll hear only the sub receiver. At
>> intermediate settings
>> you'll hear both. A BALANCE control is very useful for
contesting and split
>> operation. But it can also save a lot of AF gain control
tweaking (i.e.,
>> matching
>> main and sub), since MAIN AF controls both main and sub
receiver audio.
>>
>> * AGC-OFF AF LIMITER: An adjustable AF output limiter has been
added
>> for operators who turn AGC off. This can protect your ears if a
large
>> signal
>> appears. Signals or noise above the threshold will sound highly
distorted
>> due to the limiting action, reminding you to back down the AF
or RF gain.
>> The associated menu entry, CONFIG:AF LIM, defaults to NOR.
Typical
>> settings for those who often turn AGC off are 17 to 23, but
some
>> experimentation
>> will be required.
>>
>> * EASY SUB RX ANTENNA SWITCHING: A hold of RX ANT will
alternate
>> between MAIN and AUX for the sub receiver's antenna, if the sub
is
>> installed.
>> This is faster than going into BSET to switch the sub antenna.
>>
>> * SUB ANT SAVED SEPARATELY FOR DIVERSITY/NON-DIVERSITY:
>> At many stations, the sub receiver's AUX antenna is only used
in diversity
>> mode. The K3 now remembers which sub RX antenna setting you use
>> in diversity and non-diversity cases, so you won't have to use
BSET as
>> often.
>>
>> * DIGOUT0 SIGNAL (ACC connector): This now behaves as described
in the
>> owner's manual. When a transverter band is selected that is
configured for
>> low-power operation (i.e., .01-1.50 mW, and using the KXV3's
XVTR IN/OUT
>> jacks), DIGOUT0 provides a low-resistance path to ground that
could be
>> used to
>> activate a small relay or other circuitry. At all other times
the
>> DIGOUT0 line
>> will float (high-Z). If all transverter bands are configured
for low
>> power, then
>> DIGOUT0 can be used as a "transverter band selected" signal.
>>
>> * POWER LEVEL ON XVTR AND HF BANDS: Switching between HF and
>> transverter bands no longer modifies the present HF band power
setting.
>>
>>
>> ---
>>
>> http://www.elecraft.com
>>
>>
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Re: [Elecraft] K3 - RFC47 - Circuit diagram error

[Stewart Baker]

Well spotted Bob. The documentation always takes time to catch up.

73
Stewart G3RXQ
On Sun, 16 Nov 2008 10:03:53 -0700, Bob Cunnings wrote:
> I don't think it's an error. Inspection of the photographs in
the
> "Elecraft K3 AF Stage Upgrade Instructions" reveals value code
> brown-black-black which is 10mH. The marking on the new part
appears
> to be 101 which I read as 100mH.
>
> So it's just a recent change not reflected in the published
schematic.
>
> Bob NW8L
>
> On Sun, Nov 16, 2008 at 4:19 AM, Stewart Baker
> <[EMAIL PROTECTED]> wrote:
>> Documentation for the  speaker mod says RFC47 is 100uH.
However,
>> the circuit diagram is marked 10uH.
>>
>> 73
>> Stewart G3RXQ
>>
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[Elecraft] K3 - RFC47 - Circuit diagram error

[Stewart Baker]

Documentation for the  speaker mod says RFC47 is 100uH. However,
the circuit diagram is marked 10uH.

73
Stewart G3RXQ

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[Elecraft] K3 - S Meter funny

[Stewart Baker]

A  fellow club member commented on how his K3 S meter behaved in a
strange way when it was set SMTR MD = Abs. On investigation I
found that mine does the same.

On all bands SSB with the antenna input terminated with 50 ohms, I
found that the S Meter reading can go up when the noise level goes
down.

Situation...

ATT = ON with PRE = ON gives a S 2-3 reading.

Leaving  ATT = ON  and switching PRE=OFF,  the audio noise level
goes down, however the S meter now gives a S 4-5 reading !

With SMTR MD =nor, everything is as it should be.

Anyone else see this ?

73
Stewart G3RXQ
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Re: [Elecraft] K3 RF Feedback Problem

[Stewart Baker]

Have you tried just running the mic into your K3 without the
external station controller ?
What is that controller ?

73
Stewart G3RXQ
On Sat, 1 Nov 2008 07:57:10 -0600, Dr. James C. Garland wrote:
> Gang,
>
>
> I’m pulling my hair out over an RF feedback problem with my
K3/100, and wonder if
> anybody has any ideas? I use an external station controller that
switches key,
> microphone, CAT, line in/out, etc. between different rigs.  The
microphone audio
> connects to the K3’s rear panel microphone jack and when the
K3’s power exceeds about
> 15W (in SSB), the audio becomes greatly istorted. It does this
when all the other
> cables to the K3 (except the microphone and power cord) are
unplugged. It also does it
> when the audio is fed to the K3 via the rear Line In jack.
Everything in my station is
> well-grounded. Here are some things I’ve noticed:
>
>
> 1.  The feedback still occurs when a military-type completely
shielded 100W dummy load
> is screwed directly to the K3’s antenna port. This suggests the
RF from the K3 is
> getting into the audio line from some other source than
radiation from the coax cables
> in the station, most likely the 12V power cord. To support this
conjecture, I also
> notice that the feedback threshold (15W) is not changed when the
K3 drives a linear
> amplifier.
>
>
> 2.  I normally use a 30A Kepco 12V power supply to run the K3
and my other station
> accessories. The RF feedback problem is improved but not
entirely eliminated if I use a
> separate 12V supply for the K3. A common mode choke on the 12V
line doesn’t appear to
> make any difference.
>
>
> 3. I can see some modulation-induced fluctuationss on the 12V
line with an oscilloscope
> that increase with the K3’s power setting. I haven’t looked at
these fluctuations
> closely enough yet to know whether it’s RF noise or just
audio—frequency  fluctuations
> caused by the K3’s modulating current draw from the power
supply.
>
>
> To summarize, my conclusions so far are that (1) the 12V power
cord is a source of RF
> leakage from the K3,  even though the K3 has a filter at its 12V
power connector to
> minimize this leakage; and (2) The audio/DSP circuitry in the K3
is very sensitive to
> RF – much more so than other transceivers in my station.  (I’ve
not had this problem
> with other rigs.)
>
>
> Because of this RF sensitivity, one evidently has to be very
careful  when hooking
> accessories to the K3. The front panel microphone jack is (to
me) wired in a curious
> way, with the Mic ground and PTT ground (shield) connections
floating above the K3’s
> chassis with a 100uH rf choke. Similarly, both the “hot” and
“shield” side of the rear
> panel mic input jack has series 100uH rf chokes, which isolate
the input from chassis
> ground.
>
>
> The problem with this arrangement is that most accessories that
would connect to the
> rear panel audio input jacks have single-ended outputs, with a
shielded cable that is
> directly tied to chassis ground at the accessory end of the
cable. Thus, unless one is
> very careful, it is easy to have a situtation where the signal
grounds in the audio
> circuitry of the K3 can fluctuate with respect to the K3’s
chassis ground, and this may
> be the source of the RF feedback sensitivity.
>
>
> Unfortunately, I can’t figure out the detailed mechanism for the
feedback closely
> enough to figure out a solution. Foir example, I don’t know
whether it’s better to
> leave the minus side of my 12V power supply floating, or to tie
it to the chassis
> gound..  And even if I left it floating, it would be tied to the
chassis anyway by the
> other accessories hooked to it, and this might cause more
problems than grounding it at
> the power supply terminal. Somehow, it seems like a wiring
change in the ground
> configuration of the K3’s audio circutis to improve RF isolation
may be needed to lick
> the problem completely.
>
>
> 73,
>
>
> Jim Garland W8ZR


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Re: [Elecraft] K3 - KRX3: AF Gain

[Stewart Baker]

Make sure that the KRX3 is fully mated with  the SUBIN board 
connectors.

73
Stewart G3RXQ
On Wed, 29 Oct 2008 09:02:50 +0100, Mitch Wolfson  DJØQN wrote:
> Hi Lyle,
>
> Thanks for the tip.I am using 2.46, and it didn't work until 
you pointed
> me in the right direction.
>
> Since I had the AF Gain set to HI before I installed the KRX3, I 
now
> disabled the KRX3 and changed AF to LO. Then I enabled the KRX3 
and changed
> AF to HI afterwards, and that solved that problem.
>
> Now I notice that my KRX3 sensitivity is much lower than the 
main receiver,
> which wasn't the case when I installed it. I will try to figure 
that problem
> out on my own or otherwise contact support.
>
> Thanks again & 73,
> Mitch DJØQN
>
> - Original Message -
> From: "Lyle Johnson" <[EMAIL PROTECTED]>
> To: "Mitch Wolfson DJØQN" <[EMAIL PROTECTED]>
> Cc: 
> Sent: Wednesday, October 29, 2008 1:43 AM
> Subject: Re: [Elecraft] K3 - KRX3: AF Gain
>
>
>> Hello Mitch!
>>
>>> I have the main receiver's AF Gain set to HI, but I can't find 
a way to
>>> enable that function on the KRX3. Am I missing something, or 
is this a
>>> feature request?
>>>
>> Setting the AF GAIn HI or LO in the CONFIG menu sends the 
appropriate
>> commands to both main and sub receivers if the KRX3 is 
installed and
>> enabled.
>>
>>> With the main receiver on HI, the difference between the two 
receivers is
>>> too great to be able to hear very well on the KRX3, at least 
for the hard
>>> of hearing.
>>>
>> The gain imbalance was fixed in firmware release 2.36/1.90.  I 
also
>> confirm it is fixed in the latest development release.  I have 
not
>> specifically checked this in any interim releases.
>>
>> Which firmware do you have loaded in yhour K3?
>>
>> 73,
>>
>> Lyle KK7P
>>
>
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Re: [Elecraft] [K3] Recording a qso with the K3

[Stewart Baker]

Not at present. I hope that this one is on the list.

73
Stewart G3RXQ
On Tue, 23 Sep 2008 14:49:14 +, Peter wrote:
> Hi
>
> I like to make a complete record of a qso.
> With the line-out at the K3 connected to the sound card I can
record the
> rx part.
> Is it possible to "echo" the tx audio into line out to record
the tx part?
>
> Peter
> PC2A
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Re: [Elecraft] KRX3 config problem

[Stewart Baker]

That's great news Eric, can't wait...

73
Stewart G3RXQ
On 19 Sep 2008 08:31:00 -0700, Eric Swartz - WA6HHQ, Elecraft
wrote:
> We're actually working on the firmware for this now. :-)
>
> Stay tuned!
>
> 73,
>
> Eric  WA6HHQ
> _..._
> -Original Message-
> From: Stewart Baker <[EMAIL PROTECTED]>
> Date: Friday, Sep 19, 2008 4:27 am
> Subject: Re: [Elecraft] KRX3 config problem
>
> Yes, this fairly major feature of the K3 is missing.
>
> No timescale for it's implementation been given.
>
> 73
> Stewart G3RXQ
> On Fri, 19 Sep 2008 20:15:13 +0900, a.yoshida wrote:
>> Just finished assembling my KRX3.
>> Everything seems to work as advertized except "VFO IND "
> setting.
>
>> When I turn VFO A to set "YES" I see "UNAVAIL" in VFO B
>> I am reffering "Installation and Operation manual Rev B August
> 20, 2008".
>> Am I missing something ???
>> 73
>> aki  ja1nlx


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Re: [Elecraft] KRX3 config problem

[Stewart Baker]

Yes, this fairly major feature of the K3 is missing.

No timescale for it's implementation been given.

73
Stewart G3RXQ
On Fri, 19 Sep 2008 20:15:13 +0900, a.yoshida wrote:
> Just finished assembling my KRX3.
> Everything seems to work as advertized except "VFO IND "
setting.
>
> When I turn VFO A to set "YES" I see "UNAVAIL" in VFO B
> I am reffering "Installation and Operation manual Rev B August
20, 2008".
>
> Am I missing something ???
>
> 73
> aki  ja1nlx
>
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Re: [Elecraft] KRX3 Installation Step

[Stewart Baker]

That's what I did.

73
Stewart G3RXQ
On Mon, 8 Sep 2008 08:00:42 -0400, Roy Morris wrote:
> On page 34 of the Installation and Opeation manual it says to
remove the W4 jumber
> soldered between two pads located between J64A and the KIO3
board.  My K3 RF board is
> Rev A.  W4 is hard wired between two pads located between J64A
and the KBPF3 board
> mounted above the K3 RF board.  It looks as if I am going to
have to temporarily remove
> the KBPF3 board to remove this jumper.  Am I missing something
here?  Roy Morris  W4WFB
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Re: [Elecraft] IARU Region 1 SSB Fieldday this weekend

[Stewart Baker]

Hi Glenn,
We have taken the precaution of putting the Region 1 Bandplan on a
laminated sheet. Our supplier has said that it should still work
at a depth of 10m

73
Stewart G3RXQ
On Fri, 5 Sep 2008 17:56:40 +0200, ON4WIX wrote:
> Hi David,
>
> we always make sure to stay away at least 3kHz from the relevant
segment
> edges (depending on USB/LSB) and each year we make sure the
frequency ranges
> that can be used for "contest" style operations (e.g. 80m:
3600-3650 and
> 3700-3800 (ONLY DX 3775-3800)) are clearly listed in our FD tent
in order to
> avoid "out of segment" errors.
>
> 73
> Glenn ON4WIX
> - Original Message -
> From: "David Pratt" <[EMAIL PROTECTED]>
> To: "ON4WIX" <[EMAIL PROTECTED]>
> Cc: 
> Sent: Friday, September 05, 2008 5:43 PM
> Subject: Re: [Elecraft] IARU Region 1 SSB Fieldday this weekend
>
>
>> Fine, but please be so good as to comply with the Region 1
Bandplan. All
>> too often these SSB contest spread LF into the CW section of
the bands
>> making it impossible for QRP CW stations to work.
>>
>> 73 & thanks
>>
>> David G4DMP
>>
>> In a recent message, ON4WIX <[EMAIL PROTECTED]> wrote ...
>>> If you hear ON4NOK/p, give us a yell.
>>> My K3 will be floating around on our club's FD site, hi
>>>
>>> 73 es GL
>>> Glenn ON4WIX
>>> - Original Message - From: "Stewart Baker"
>>> <[EMAIL PROTECTED]>
>>> To: "GW0ETF" <[EMAIL PROTECTED]>

>>> Sent: Friday, September 05, 2008 2:51 PM
>>> Subject: Re: [Elecraft] IARU Region 1 SSB Fieldday this
weekend
>>>
>>>
>>> If the rain doesn't stop soon we will be signing G3MDG/MM !
>>>
>>> 73
>>> Stewart G3RXQ
>>> Chesham & District ARS
>>> On Fri, 5 Sep 2008 04:49:35 -0700 (PDT), GW0ETF wrote:
>>>
>>>>
>>>> Toby Deinhardt wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> this weekend is our SSB Fieldday: Saturday 13UTC to 13UTC
>>> Sunday.
>>>
>>>>> Please listen for /p stations from region 1 this weekend.
>>>>>
>>>>> The DL rules (in English):
>>>>> <http://www.darc.de/referate/dx/xedcfr.htm>
>>>>>
>>>>>
>>>>> vy 73 de toby
>>>>>
>>>>>
>>>> GW4TTA/p will (weather permitting!) be qrv from the island of
>>> Anglesey,
>>>> North Wales with up to 2 K3s at our disposal.
>>>>
>>>> It's forecast heavy rain so signals may be a little
watery..
>>>>
>>>> 73, Stewart GW0ETF
>>>>
>>>
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>>>
>>>
--
--
>>> 
>>>
>>>
>>> No virus found in this incoming message.
>>> Checked by AVG - http://www.avg.com
>>> Version: 8.0.169 / Virus Database: 270.6.16/1654 - Release
Date:
>>> 5/09/2008 13:24
>>>
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>>
>> --
>> David G4DMP
>> Leeds, England, UK
>> --
>>
>
> 

>
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com
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5/09/2008
> 13:24
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Re: [Elecraft] IARU Region 1 SSB Fieldday this weekend

[Stewart Baker]

If the rain doesn't stop soon we will be signing G3MDG/MM !

73
Stewart G3RXQ
Chesham & District ARS
On Fri, 5 Sep 2008 04:49:35 -0700 (PDT), GW0ETF wrote:
>
>
> Toby Deinhardt wrote:
>
>> Hi,
>>
>> this weekend is our SSB Fieldday: Saturday 13UTC to 13UTC
Sunday.
>>
>> Please listen for /p stations from region 1 this weekend.
>>
>> The DL rules (in English):
>> 
>>
>>
>> vy 73 de toby
>>
>>
> GW4TTA/p will (weather permitting!) be qrv from the island of
Anglesey,
> North Wales with up to 2 K3s at our disposal.
>
> It's forecast heavy rain so signals may be a little watery..
>
> 73, Stewart GW0ETF


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Re: [Elecraft] K3 Harmonic Distortion

[Stewart Baker]

I find virtually the same results here using  50uV RF from an 
Elecraft signal source, and measuring using Wave Spectra.
An offset of 43 to 45dB, and below LIN OUT = 5 the harmonics drop 
rapidly.

73
Stewart G3RXQ
On Tue, 02 Sep 2008 12:28:02 -0400, Jack Smith wrote:
> Brendan:
>
> You might wish to look at the measurements I made, with LIN OUT 
settings
> from 2 to 100.  There's an animated GIF that steps through the 
LIN OUT
> settings so you can see  the effect. The data was  taken at 600 
Hz.
> http://www.cliftonlaboratories.com/elecraft_k3_receive_audio.htm 
about
> half way down the page
>
> Like you, I see a relatively constant 45 dB or so offset between 
the
> fundamental and 3rd harmonic for LIN OUT values of 10 and over.
>
> However, setting the LIN OUT at 2 results in quite a bit better 
odd
> order harmonic suppression, on the order of nearly 70 dB. By the 
time
> LIN OUT is set to 5, however, the odd order suppression is 
reduced to a
> bit more than 60 dB. At LIN OUT = 10, it's 45 dB or so where it 
stays at
> all values of LIN OUT tested between 10 and 100.
>
> (For some reason, the 2nd harmonic pops up at certain settings, 
but not
> others higher or lower, but that's not of immediate concern.)
>
> There's a  related issue with the AGC. The audio output is 
proportional
> to RF signal level, as the AGC has a slope to it. Hence, even 
though the
> LIN OUT might be set to, say, 2, the actual audio level and 
hence the
> distortion, will vary as the RF signal level changes. The degree 
of
> audio level variation with RF input changes depends on how the 
user has
> set the K3's AGC slope and intercept parameters.
>
> I'll make  the measurements on a couple of TTC-108 parts when 
they
> arrive as a matter of trying to understand where the harmonic 
distortion
> arises. To duplicate the K3's audio chain, I'll drive the 
TTC-108s from
> an op-amp so that it will be hit with a low Z source, instead of 
the
> standard audio generators available to me, with 50 or 600 ohm 
output Z.
>
> Jack
>
>
> Brendan Minish wrote:
>> Jack
>>
>> I have seen postings on the main reflector recommending 
settings as low
>> as 3 to avoid distortion products that are being attributed to
>> transformer distortion. This did not really make sense to me, 
especially
>> at such low levels where consumer sound cards tend to get 
non-linear and
>> nasty.
>>
>> I took a look at the specifications for the TTC-108 audio 
transformer
>> used in the line out of the K3
>>
>> Nominally it's specified as having an operating level of -45dBm 
to
>> +7dBm
>> THD is specified at 0.5% @0dBm 300Hz to 3.5 Khz @ 0dBm
>> this would make the transformer related harmonics worst case at 
-46dB
>> relative to the fundamental
>>
>> I did some measurements with an s9 CW signal zero beat at 
various pitch
>> settings
>> I used an old copy of SMAART pro that I have from my Sound 
engineering
>> days. the sound card is a delta44
>>
>> Lin = 100   Pitch 300   pitch 550   pitch 800
>> DR3 47.3dB  51.4dB  54dB
>>
>> Lin = 50Pitch 300   Pitch 550   Pitch 800
>> DR3 43.1dB  47.6dB  50.6dB
>>
>> Lin = 10Pitch 300   Pitch 550   Pitch 800
>> DR3 35dB39.7dB  43.1dB
>>
>> Lin = 5 Pitch 300   Pitch 550   Pitch 800
>> DR3 31.9dB  37.7dB  42.7dB
>>
>> Lin = 3 Pitch 300   Pitch 550   Pitch 800
>> DR3 31dB40.3db  47.6dB
>>
>> DR3 is the Dynamic range between the fundamental and the 3rd 
harmonic
>> (the most dominant harmonic by a wide margin)
>>
>> I did a quick look at 5th and 7th orders too, again the best 
performance
>> here was found with LIN = 100
>>
>> LIN = 100 is an output level of approximately 700mv for an S9 
CW sig on
>> my K3
>>
>> The Harmonic distortion does not increase with higher line out 
levels,
>> it actually improves. This does not appear to be a transformer
>> saturation issue
>>
>> With lin = 100 users will see a ghost on the waterfall and may 
risk
>> over-driving some consumer sound cards. lowering LIN may get 
rid of the
>> visible ghost by reducing the 3rd Harmonic to below the 
waterfall
>> threshold (& perhaps the sound card input noise floor ) but 
also reduces
>> the overall usable dynamic range
>>
>>
>> 73
>> Brendan EI6IZ
>>
>>
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Re: [Elecraft] K3 - Temperature Specifications

[Stewart Baker]

Thanks Gary (and others),
I think that since fitting the 2nd RX the unit gets quite a bit
warmer. The supply volts are 13.7 and the current on receive is
1.07A, so that's about 14W, not excessive.

If the unit is on receive and the fans are not running,  the only
place for the heat to escape from the front half of the K3 is via
the speaker hole, and by conduction through the case. The slots at
the back half of the top cover seem to let little heat out because
of the height of the PA shield.

Haven't got an 'official' reply yet.

73
Stewart G3RXQ
On Sun, 31 Aug 2008 21:03:37 -0700 (PDT), W7TEA wrote:
>
> Stewart, I don't know the specifications.  My shack is 23C and
the K3
> has been on receive all day.  The FP is 31-32C and PA is 30C.
> My fans start when I'm barely into a QSO and when the PA reaches
37C.
> I calibrated the PA just yesterday.
>
> 73, GAry W7TEA
>
>
> I have had my K3 on receive most of the day, whilst doing other
> things in the shack.
>
> By chance I touched the top of the case and it felt quite hot,
> given that the shack temperature is 26 deg. According to the LCD
> readout both the FP and PA temps were at 34 deg.


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[Elecraft] K3 - Temperature Specifications

[Stewart Baker]

I have had my K3 on receive most of the day, whilst doing other
things in the shack.

By chance I touched the top of the case and it felt quite hot,
given that the shack temperature is 26 deg. According to the LCD
readout both the FP and PA temps were at 34 deg.

It got me wondering,  what are the temperature specifications for
the K3 ?
I have looked through various paperwork on the Elecraft site, but
can find no information on the subject.

73
Stewart G3RXQ
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[Elecraft] K3 - Link VFO's - Lock Icon

[Stewart Baker]

I don't know which beta release it was implemented in, but I
notice that when the VFO's are LINKED there is a Lock Icon against
VFO B.

I know that it is not possible to tune using VFO B when the VFO's
are linked, but I find the use of the Lock icon when in LINKED
mode confusing. It doesn't specifically tell me that whether the
VFO's are linked or just that VFO B is locked.

I would prefer another method of showing that the VFO's were
linked.

Maybe by making the left hand decimal point flash. This method is
used with the right hand decimal point flashing to indicate the
DIVERSITY mode.

What do others think ?

73
Stewart G3RXQ




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Re: [Elecraft] K3 Beta Firmware, Revision 2.31

[Stewart Baker]

Yes, very good.

We've had ESSB & Diversity implemented.
VFO IND next ?

73
Stewart G3RXQ
On Thu, 28 Aug 2008 10:42:15 -0700, wayne burdick wrote:
> K3 beta-test firmware revision 2.31 is now available. This is an
> extensive update; details appear below. Please send any problem
reports
> to [EMAIL PROTECTED]
>
> For instructions on how to load beta firmware, please see:
>
> http://www.elecraft.com/K3/k3_software.htm
>
> 73,
> Wayne
> N6KR
>
> * * *
>
> MCU 2.31 / DSP 1.89, 8-28-08
>
> New Features and Enhancements:
>
> * CW SIDETONE INCREMENTS NOW 10 HZ (originally 50 Hz).
>
> * RIT CLR switch now works during transmit in all modes and at
any time.
>
> * RIT CLR MENU ENTRY: You can use this menu entry to select
"UNDO ON" or
> "UNDO OFF". OFF is the default. When "ON", tapping CLR will
alternate
> between
> 0.00 and the present RIT/XIT offset, if any.
>
> * DIVERSITY RECEIVE MODE: If you have the sub receiver (KRX3
option)
> installed,
> you can take advantage of "diversity receive" by using two
separate
> receiving antennas.
> This can improve signal copy during fading, and adds a spatial
(L/R)
> effect to signals.
> DIVERSITY MODE further enhances this capability by slaving the
sub
> receiver's
> mode, filter settings, and VFO to the main receiver. To enter
diversity
> mode, hold
> SUB until you see "DIVRSTY" on VFO B (about 2 seconds). The kHz
decimal
> point
> of the VFO A display will flash slowly as a reminder that
diversity
> mode is in effect.
>
> Notes on Diversity Mode:
>
> 1. Entering diversity mode switches the sub receiver  to its AUX
antenna
> source. If you don't hear any right-channel audio, you probably
don't
> have
> an antenna connected to the sub's AUX input. Refer to the
owner's manual
> or KRX3 manual for information on sub receiver AUX antenna
> configuration.
>
> 2. If your main and sub receiver have 5-pole crystal filters
with
> differing frequency
> offsets, you may hear a slow phase modulation in the received
audio at
> some
> VFO frequencies. The only way to eliminate this effect is to use
5-pole
> filters with
> matched offsets (available on request; contact Elecraft) or use
8-pole
> filters,
> which have no offset.
>
> Miscellaneous changes:
>
> * DUAL PB CW MIN CONTEXT BANDWIDTH NOW 400 Hz. In high-QRM
situations,
> a 400 Hz or 500 Hz crystal filter may be very useful as a limit
to the
> context bandwidth.
> Note that the "pedestal" effect (-24 dB context filter) becomes
more of
> a sloped
> response as the context bandwidth is reduced.
>
> * DATA TX ALC IMPROVEMENTS. PWR control is now more responsive
during
> transmit in all DATA modes.
>
> * FM SQUELCH THRESHOLD: Closely matched between main and sub
receivers.
>
> * NOISE BLANKER ON/OFF ON BAND CHANGE: The DSP noise blanker
> wasn't set up properly during band changes. It may have been
left ON on
> the new
> band in some cases.
>
> * PA TEMP and FP TEMP are now "normal" VFO B alternate display
modes,
> meaning that you don't have to set TECH MD to ON in the config
menu.
>
> * DDS frequency shifting during T/R changed to eliminate a
variation in
> CW
> keying duty cycle that was occurring only over specific, narrow
> frequency ranges
> on each band. This also eliminated a related CW keying artifact.
>
> For software developers:
>
> * RG$ command implemented (sub receiver RF gain).
>
> * "FA", "UP" ,"DN", "RC", "RU", and "RD" COMMANDS UPDATE VFO B
IF
> VFOS ARE LINKED (except in SPLIT). These commands can also be
used
> in transmit mode.
>
>
> ---
>
> http://www.elecraft.com
>
>
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RE: [Elecraft] K3 - Keeping the dust out..

[Stewart Baker]

That's a good idea. She can now put her very expensive Bernina
sewing machine which gives out sprogs all over 80 & 40 to good
use..

73
Stewart G3RXQ
On Thu, 28 Aug 2008 12:46:11 -0700 (PDT), Julian, G4ILO wrote:
>
>
> doberman wrote:
>
>> How about the dust covers someone suggested a few or so posts
ago??
>>
>> Reviewed here:
>>
>> http://www.eham.net/reviews/detail/7387
>>
>>
> Or ask your xyl to make a dust cover for your K3, like mine did.
:)
>
> -
> Julian, G4ILO. K2 #392  K3 #222.
> http://www.g4ilo.com/ G4ILO's Shack
http://www.ham-directory.com/ Ham
> Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft
K2 and K3


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[Elecraft] K3 - Keeping the dust out..

[Stewart Baker]

Any suggestions other than silicon sealant for keeping  dust from
finding it's way onto the back of the LCD cover ?

I have to take the cover off about every couple of months to clean
it where dust  has fallen down the gap with the front panel
metalwork.

The shack is not very dusty (despite what the wife says)...
And it's dust not dandruff !

73
Stewart G3RXQ




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Re: [Elecraft] K3- KRX3 and DVR Installation Sequence

[Stewart Baker]

On Thu, 28 Aug 2008 11:08:35 -0400, Barry N1EU wrote:
> On Thu, Aug 28, 2008 at 10:58 AM, Stewart Baker
> <[EMAIL PROTECTED]> wrote:
>> My experience is that although it only takes a minute or so to
>> remove the KRX3, it takes quite a lot of time to re-install. 
Most
>> of that time being taken up in routing the coax cables.
>>
> Only disconnect the KRX3 ends of the 3 TMP cables.  Just leave 
them in
> place and secure them out of the way with an alligator clip to 
the
> KPA3 shield.  To reinstall, just plug in the 3 cables and drop 
the
> KRX3 in.  It only takes a couple of minutes.

That's a good technique, must remember it for the next time.
>
> The speed of KRX3 reinstall is a moot point relative to the DVR 
since
> as Lyle described, you don't need to remove the KRX3 to install 
the
> DVR.  You just need to remove the front panel.

My front panel is getting quite a bit easier to fit with each 
removal and reinstallation :-)

73
Stewart G3RXQ


>
> 73,
> Barry N1EU
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Re: [Elecraft] K3- KRX3 and DVR Installation Sequence

[Stewart Baker]

My experience is that although it only takes a minute or so to
remove the KRX3, it takes quite a lot of time to re-install. Most
of that time being taken up in routing the coax cables.

73
Stewart G3RXQ
On Thu, 28 Aug 2008 07:27:40 -0700 (PDT), Barry N1EU wrote:
>
>
> Terry Schieler wrote:
>
>> Will there need to be a substantial amount of disassembly
>> of the K3 to get the DVR installed?  If this is the case, I
will probably
>> hold off on installing my KRX3 until the DVR unit arrives and
do it all in
>> one operation.
>>
> Terry, the DVR installation is a moot point as far as whether
you should
> delay KRX3 installation.  Once installed, KRX3 removal is quite
simple and
> can be accomplished in about one minute.  You should go ahead
and install
> your KRX3.
>
> 73,
> Barry N1EU


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Re: [Elecraft] Auto balanced tuner

[Stewart Baker]

I made a carbon copy of this ATU. It works pretty well, however at
impedance extremes it was a bit lossy.

73
Stewart G3RXQ
On Wed, 20 Aug 2008 09:12:01 -0700, Vic K2VCO wrote:
> David Andrews wrote:
>> I'm using a h/b 1930's link (balanced) tuner. It's as efficient
as I can
>> get, and open wire feeders closely balanced. What I'd really
like is the
>> same automated, either using motorised variable caps or
switched
>> caps/inductance. Has anyone any links or have they managed it
themselves?
>>
> Here's a really nice one:
>
> 
>
> Get ready to sell your car and mortgage your home, however.


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Re: [Elecraft] K3 Headset Audio - Is this correct ?

[Stewart Baker]

Thanks to all who replied.
Yes, I know that it works OK with SPKRS=2, however I would like to
use SPKR=1 so that I can have both the main and sub RX audio
coming from the internal LS.
However, I would also like to use the headphones at the same time,
even if it is a combined audio to both left and right phones.

Maybe the routing of the headphone audio is such that it  is not
possible to do the same with both the LS and headphones selected
without only 1 headphone channel being active.

73
Stewart G3RXQ
On Sat, 16 Aug 2008 06:54:14 -0400, Ken K3IU wrote:
> Try it with CONFIG:SPKRS set to 2. Works here.
> 73,
> Ken K3IU
>
> Stewart Baker wrote: > Since fitting the 2nd RX I have been
exploring the audio
> settings and find that:- To get 1st & 2nd RX audio thru the
speaker I have SPKRS=1.
> This is fine, however if I have SPKR+PH=YES, then I only get
audio from the LH
> headphone. With SPKR+PH=NO, I get audio from both LH and RH
headphones. Is this correct
> ? I am using a Heil PRO headset. 73 Stewart G3RXQ
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[Elecraft] K3 Headset Audio - Is this correct ?

[Stewart Baker]

Since fitting the 2nd RX I have been exploring the audio settings
and find that:-

To get 1st & 2nd RX audio thru the speaker I have SPKRS=1.
This is fine, however if I have SPKR+PH=YES, then I only get audio
from the LH headphone.

With SPKR+PH=NO, I get audio from both LH and RH headphones.

Is this correct ?

I am using a Heil PRO headset.

73
Stewart G3RXQ
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Re: [Elecraft] K3 :: Data A mode TX EQ function

[Stewart Baker]

For convenience, I have generated a number of macros under the HRD
CAT command facility. I assigned them to buttons on the HRD front
panel. I have macros for TX EQ & RX EQ for CW & SSB.
For easy identification, part of the macro displays the name on
the K3 LCD bottom line.

E.g.

TX SSB1

AI0;K31;MN009;SWT53;SWT27;UP;UP;SWT29;UP;SWT33;UP;MN255;K30;
DBT;DBX;DB ;DBS;DBS;DBB;DB1;

73
Stewart G3RXQ
On Mon, 11 Aug 2008 08:01:08 -0700 (PDT), GM0ELP wrote:
>
> You could use the following macro till this gets sorted in the
firmware:
>
> AI0;K31;MN009;SWT53;MN255;K30;
>
> A similar macro could replace your TX SSB equaliser settings at
the touch of
> a button. There are more details on a previous posting for RX
Equaliser on
> this forum.
>
> Doug


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[Elecraft] Re: [K3] annoying resonance with internal speaker in K3

[Stewart Baker]

So do I  Fern.

I tried the tape, which originally seem to stop the problem.

I then took a side cover off, and looked at the various
clearances.

I came to the conclusion the main culprit was the top of the PA
shield being close to the top cover, but not actually attached to
it.

My solution, until I get the file out was to split a piece of
rubber sleeving lengthwise, and curl this over the top edge of the
metal shield. This forces the top cover up slightly and also stops
the metal surfaces from coming into contact on audio peaks.

73
Stewart G3RXQ
On Mon, 11 Aug 2008 08:34:25 -0600, Fern Rivard wrote:
> Yes Stewart, I DO have the stiffener in place otherwise there
would be some exposed
> holes on the top lid! I temporarily put some black electrical
tap between the contact
> areas where the top lid meets the radio but that didn't stop any
of it. The resonance
> appears to come from down below the pa unit. Fern
>
>
> - Original Message -----
> From: "Stewart Baker" <[EMAIL PROTECTED]>
> To: "David Ferrington, M0XDF" <[EMAIL PROTECTED]>
> Cc: "Fern Rivard" <[EMAIL PROTECTED]> "Elecraft List"

> Sent: Monday, August 11, 2008 4:14 AM
> Subject: Re: [K3] annoying resonance with internal speaker in K3
>
>
> Oh Yes !
>
> 73
> Stewart G3RXQ
> On Mon, 11 Aug 2008 10:56:36 +0100, David Ferrington, M0XDF
wrote:
>> Strange, mine not only does not do that, but I can't make it do
> that
>> even if I tap it - do you have the chassis stiffener in place
> correctly?


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[Elecraft] Re: [K3] annoying resonance with internal speaker in K3

[Stewart Baker]

Oh Yes !

73
Stewart G3RXQ
On Mon, 11 Aug 2008 10:56:36 +0100, David Ferrington, M0XDF wrote:
> Strange, mine not only does not do that, but I can't make it do
that
> even if I tap it - do you have the chassis stiffener in place
correctly?


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Re: [Elecraft] annoying resonance with internal speaker in K3

[Stewart Baker]

The buzzing I noticed on my K3 is the top cover vibrating against
the top of the PA shield. There should be a greater clearance
between the two.

I have been waiting until there is a reason to disassemble my K3,
so I can take a file to the metalwork. That is what I would do if
I were building another one from scratch.

Also the ATU board makes intermittent contact with the cover.

73
Stewart G3RXQ
On Sun, 10 Aug 2008 21:47:14 -0600, Fern Rivard wrote:
> I have a K3 serial #412 which has always had an annoying
resonance from the internals
> of the radio cabinet somewheres when using the internal speaker.
I thought that it may
> have been the top lid which did that so I tried to isolate the
top lid by temporarily
> adding some electrical tape between the top and when it meets
the the top of the radio.
> However, that did NOT accomplish anything for me. Has anyone
found a permanent cure for
> that annoying resonance?
> This afternoon I took my K3 for a bit of "Show and Tell" to a
get together picnic that
> our local ham club put on  this afternoon. Not having a spare
antenna conveniently
> laying around, I just took a small roll of telephone extension
wire "4 conductor in it)
> so I soldered all four wire together with enough solder residue
so that it would just
> fit inside the SO-239 ant#1 rear connector. I guestimate that I
had an approximate
> lenght of 35 feet or so of wire that I strung between trees. I
had the K3 on a padded
> surface on the hood of my vehicle to make it handy for the
audience to see it. I tried
> the automatic antenna tuner on all bands from 80 to 10 meters
with a resultant perfect
> match from 75 meters all the way to 10 meters with 1:0 to 1
match. Unfortunately band
> conditios were not very good today.
>
> 73 from Fern   VE7GZ
>
>
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Re: [Elecraft] u want nice audio?

[Stewart Baker]

Looks more like an Air Freshener ::-)

73
Stewart G3RXQ
On Wed, 06 Aug 2008 16:17:33 +0100, Ian Maude wrote:
> Bert Craig wrote:
>> How about Palstar's offering?
>>
>> http://www.palstar.com/sp30.php
> God that's ugly :)
>
> 73 Ian


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Re: AW: [Elecraft] Re: K3 Audio

[Stewart Baker]

Is that really so ?

If that's the case, then the design is poor..

73
Stewart G3RXQ
On Wed, 6 Aug 2008 09:32:55 +0200, Koppendorfer Klaus wrote:
> did you use the line out ?? The Line Output
> transformers of the K3, saturate at normal program levels
> try Headphone out on Frontplate and you will see no Harmonic´s
>
> 73
> OE6KYG
> KX1 244
> K2 1331
> K3 115
>
>> -Ursprüngliche Nachricht-
>> Von: [EMAIL PROTECTED] [mailto:elecraft-
>> [EMAIL PROTECTED] Im Auftrag von Ian Maude
>> Gesendet: Mittwoch, 06. August 2008 09:27
>> An: elecraft Reflector
>> Betreff: Re: [Elecraft] Re: K3 Audio
>>
>> Bob Cunnings wrote:
>>> If you listen to Sherwood's presentation, you'd hear him state
that
>>> the distortion problem he discusses occurs only when driving a
low
>>> impedance (speaker) load. If driving a high Z load like, say,
powered
>>> speakers, or using headphones, there is no problem.
>>>
>> There is still a bit of a problem on receive audio.  This has
been there
>> for some time and exists in the form of harmonics.  The 3rd
harmonic is
>> quite easy to see and repeatable.  I used HRD to show this on
the
>> waterfall after a conversation with a friend.
>> You can clearly see the harmonic at..
>>
>> http://www.gb7mbc.net/docs/K3Audiotrace.doc
>>
>> 73 Ian
>>> So that might explain your observations.
>>>
>>> Bob NW8L
>>>
>>> On Tue, Aug 5, 2008 at 4:29 PM, Geoffrey Downs
>>> <[EMAIL PROTECTED]> wrote:
>>>
 Would be interesting to know the detail of what Rob Sherwood
said, but
>> I
 agree with you, Dave. The tx and rx audio on my K3 sounds
cleaner,
>> brighter
 and clearer to me than my now obsolescent FT1000MP Field even
before
 applying any equalisation. I use either a headset or a couple
of small
 external computer speakers.

 73 to all

 Geoff
 G3UCK

 - Original Message - From: "Dave G4AON"
>> <[EMAIL PROTECTED]>
 To: 
 Sent: Tuesday, August 05, 2008 9:55 PM
 Subject: [Elecraft] Re: K3 Audio


> Bottom line to me is the K3's audio is fine. And no, I'm not
on
>> commission
> from Elecraft!
>
> 73 Dave, G4AON
> K3/100 #80
>
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>>>
>>
>> --
>>
>> Ian J Maude, G0VGS
>> SysOp GB7MBC DX Cluster
>> Member RSGB, GQRP
>> K2 #4044 |K3 #455
>>
>>
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Re: [Elecraft] Canceled my K3, bummer.

[Stewart Baker]

With the current recession (sorry credit crunch), I am thinking
about making my K3 available for hire for  contests and
DXpeditions :-)


73
Stewart G3RXQ
On Thu, 31 Jul 2008 17:26:14 -0700 (PDT), W7TEA wrote:
>
> Maybe you could have put your order on "hold" to keep your spot
in the queue
> and then reactivate when economic condx allow.  Maybe too late
now, but that
> was an
> option earlier this year.
>
> Gary W7TEA
>
>
> Gary D Krause wrote:
>
>> I canceled my K3 order.  With the price of food and fuel along
with
>> everything
>> else, I figured it would be smart to hold off for now.
>>
>> The good news is that I still have my K2 which is a terrific
rig and I'm
>> guessing that everyone else gets bumped up another notch!
>>
>> I still plan to buy a K3, it's just not going to happen as soon
as I
>> wanted.
>>
>> Gary, N7HTS
>>
>>
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Re: [Elecraft] Using Voice Files along with Mike Input on a K3

[Stewart Baker]

It would be nice to have a LINE OUT setting something like =TX/RX
where both the received audio and the transmitted audio were
available at a preset (independent of volume control) level.
It would be very useful in contests to record both sides of a
contact CW or SSB.

73
Stewart G3RXQ
On Wed, 30 Jul 2008 11:07:35 -0400, hank  k8dd wrote:
> Ed .
>
> If you look at http://www.writelog.com/support/wlso2r.pdf it
shows how to
> set up the mike for SSB contesting.   If you ignore the Left Rig
and the
> W5XD Multi+ keyer and just look at the Right Rig and microphone
setup you
> will see how to keep the audio from the other ops out of your
mike.
>
> In N1MM configurer you can select the line to mute when playing
wav files.
> This is also mostly the Mic input.  Check
> http://pages.cthome.net/n1mm/html/English/BasicFunctions.htm#Rec
ording_Wav_files
> for recording info.
>
> I have found that if the MON level is turned up so you can hear
yourself,
> with MIC + Line in you will get feedback when you activate PTT.
 I'm
> assuming this will not happen if the mike is plugged into the
sound card.
>
> Also, if you want to record both TX and RX audio in the contest
you have to
> select =PHONES.  This will send TX & RX audio to the sound card
at a level
> controlled by the AF Gain control (NOT Line Out level) and
possibly
> overdrive your sound card.
>
> 73HankK8DD
>
>
> - Original Message -
> From: "Ed Steeble" <[EMAIL PROTECTED]>
>
>> I tried to use a K3 in the IOTA contest on SSB but ran into a
problem.
>> I couldn't figure out how to satisfactory key the K3 with wave
>> files from N1MM Logger and also use a Heil Headset. Reading the
manual it
>> appears that you can have audio input from ONLY the front
panel, rear
>> panel, OR line in. The wave files were coming via the line in
and the
>> mike via the Front panel. Did I over look something?
>>
>> A fellow team member and I considered paralleling the mike and
sound
>> card input but we didn't want a live mike while wave files were
playing.
>> The Elecraft web site says that their digital voice recorder
(KDVR3) is
>> not yet shipping. For now, does this mean that that I have to
use my
>> MFJ voice keyer (configured for a Kenwood radio) if I want
audio files AND
>> mike capabilities?
>>
>> When using a K3, how are others handling SSB contests?
>>
>> 73, Ed
>> K3IXD
>>
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Re: [Elecraft] [OT] Hilberling PT-8000 cancelled.

[Stewart Baker]

Sorry Ian, not so.
If you had read the EMC column in RadCom you will see that
complaints have been lodged with Ofcom by the RSGB EMCC with
regard to computer SM PSU's. These are manufactured in China,
fully CE marked, and sold through at least 3 well known
electronic/computer outlets.

In all cases the PSU's have been CE tested with the required input
suppression components fitted, however when they are supplied to
the UK these components are omitted, and wire links fitted in
their place. The conducted noise level from these PSU's exceeds
the permitted levels by many times.

This is a clear breach of EU EMC legislation, but so far no action
has been taken. They have also turned up in quantity in France.

I am sure that these outlets selling the PSU's demanded, and got
the paperwork. Unfortunately it is worthless unless there is
enforcement. To date, despite much communication there has been
nothing from Ofcom to move the matter forward.

Taking the PSU back to the shop is fine if you brought the unit.
Not so easy if it is a neighbour who's computer SM PSU is wiping
out the HF bands.

Although, not an EMC matter fairly recently a young boy was
electrocuted because a CE marked computer PSU was of such poor
quality that a low voltage wire touched the mains input wiring. In
this case Trading Standards are investigating (after the event)...

I am sorry if is rather OT, however it should be of interest to
those who believe that all is well on the EMC front...

73
Stewart G3RXQ
Member RSGB EMC Committee


On Sat, 26 Jul 2008 09:43:27 +0100, Ian White GM3SEK wrote:
> Stewart Baker wrote:
>> All fine in principle, but here in the UK, nobody is enforcing
the EMC
>> legislation.
>>
> It's true that nobody is enforcing it effectively against grey
imports.
> On the other hand, those are only a small minority of sales. The
vast
> majority of sales come from responsible manufacturers, through
> responsible  distributors.
>
> In Europe, the distributors provide the most effective
enforcement of
> manufacturing standards for consumer goods. This is because
consumers in
> Europe have strong legal rights which are directly against the
> distributor. If there is a manufacturing defect, then in most
cases the
> consumer has a legal right to reject the goods and demand a
refund from
> the distributor. (Some distributors still try to fool customers
into
> going back to the manufacturer, but most consumers are becoming
much
> more savvy about the law. Refusal to give a refund *will* bring
down
> heavy enforcement from the consumer protection agencies.)
>
> The faulty goods then become the distributor's liability. Even
if the
> issue is eventually resolved with the manufacturer, the time and
trouble
> eats up everybody's profit margin. To avoid such situations as
far as
> possible, distributors routinely demand formal declarations of
quality,
> including compliance with all applicable standards.
>
> That still isn't to say that every declaration of compliance is
> truthful, or that the technical standards themselves are totally
> effective - far from it! - but even the present situation is a
whole lot
> better than nothing.


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Re: [Elecraft] [OT] Hilberling PT-8000 cancelled.

[Stewart Baker]

All fine in principle, but here in the UK, nobody is enforcing the 
EMC legislation. Maybe Ireland is more fortunate.

73
Stewart G3RXQ
Member RSGB EMC Committee

On Sat, 26 Jul 2008 01:45:54 +0100, Brendan Minish wrote:
> On Fri, 2008-07-25 at 13:29 -0700, Alan Bloom wrote:
>> However, I believe Europe also has SUSCEPTABILITY
>> requirements which the FCC does not.  That is a good thing for 
radio
>> amateurs, or anyone who operates a transmitter.
>>
> In Europe we do have ingress limits for consumer equipment and 
indeed
> they are set high enough to be useful to protect the 
transmitting
> amateur from many of the issues surrounding badly engineered 
consumer
> devices.
>
> Our CE rules also set emissions limits for consumer devices but 
unlike
> FCC part b the liability for any remaining issues to radio users 
EVEN
> where a device is fully CE compliant remains with the 
manufacturer or
> importer, not with the consumer that owns the device.
>
> CE compliance does not assume compliance with the EMC directive 
(article
> 4a is the relevant section for us)
>
> "the electromagnetic disturbance it generates does not exceed a 
level
> allowing radio and telecommunications equipment and other 
apparatus to
> operate as intended"
>
> no minimum limit is set for this condition to presumed to be 
met.
>
> This is actually great deal of protection for amateurs since 
even a
> fully CE complaint device that is causing interference to a 
radio user's
> normal operation must be resolved by the manufacturer or 
importer, not
> the hapless consumer that bought the device without knowledge 
that it
> was going to cause an issue for the 'radio ham next door'
>
>
> the EMC directive is available to read here
> http://ec.europa.eu/enterprise/electr_equipment/emc/directiv/tex
t.htm
>
>
> 73
> EI6IZ (EMC representative for the IRTS)


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Re: [Elecraft] K3 died while attempting firmware download

[Stewart Baker]

I have had this on a number of occasions :-
*** DON'T PANIC ***

The Bad News is that something got screwed up on the recent
firmware download.

The Good News is that no harm was done, and your K3 is sitting
there ready to try again.

My advice would be to restart your computer, check your COM ports
and wiring, particularly if you are using a USB to serial
converter.

Restart the configuration utility, and check that you have the
correct port selected.

Just tick the MCU, and the always load data tables boxes, and try
to download again.

With a following wind you should be back in business.

73
Stewart G3RXQ

On Fri, 25 Jul 2008 12:58:27 -0400, Gary Nichols wrote:
> Help please.I killed w8uvz's K3 while trying to download current
firmware.
> The computer attempted to download three times and then became
> non-responsive.  I could not power down the K3 so I turned off
the power
> supply.  When re-applying power the TX light is blinking and
only MCU LD
> appears on the screen without backlighting.  How do I get back
to a working
> radio from here?  Thanks, de gary, kd9sv
>
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[Elecraft] K3 RIT Coarse Tune Lock

[Stewart Baker]

To prevent inadvertent QSY's, I would like to have the RIT coarse
tune (CONFIG:VFO OFS) be locked when the LOCK button is pressed.

73
Stewart G3RXQ
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RE: [Elecraft] KRX3

[Stewart Baker]

Wow, that was quick !
I only went downstairs to make a cup of tea

I will look out for MCU 2.17.

73
Stewart G3RXQ
On Tue, 22 Jul 2008 09:43:13 -0700, Ed Muns wrote:
>> My only comment so far is - why does switching the SUB RX
>> ON/OFF/ON cancel SPLIT ?
>>
> This is fixed in MCU 2.17, so QRX for that or a later firmware
version on
> the Elecraft FTP site.
>
> 73,
> Ed - W0YK


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[Elecraft] KRX3

[Stewart Baker]

My KRX3 came today. Installed in about 2.5 hours, with no
problems, however the coax cable routing was fun...

Very pleased with this addition to my K3.

My only comment so far is - why does switching the SUB RX
ON/OFF/ON cancel SPLIT ?

I would prefer that the operator has full control over the SPLIT
function. Just toggling the SUB button could get you a response of
 "UP UP" !!  :-(

73
Stewart G3RXQ


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Re: [Elecraft] K3 CW in SSB mode option to disable on 60m feature request

[Stewart Baker]

I agree Julian,
Let's use the "Little Gray Cells" between our ears.

If not, there's always EchoLink, Skype etc.

73
Stewart G3RXQ
On Mon, 21 Jul 2008 00:49:10 -0700 (PDT), Julian, G4ILO wrote:
>
>
> Brett Howard wrote:
>
>> Personally I'd rather have the ability to do CW in SSB anywhere
as it
>> turns out to be a good safety feature if ever need be.  Granted
cross
>> mode is more of a safety option when we're talking about a KX1
but you
>> never know.  Personally I feel that not disallowing TX outside
of the
>> bands (or making things configurable so that one can transmit
outside of
>> band (with just a warning if your OOB) would be a good
enhancement.
>>
> I agree. I don't see any reason to disable anything. If you
don't want to
> use something, or aren't allowed to use something, then just
don't use it.
> We're licensed amateurs, we know what the rules are, we don't
need our
> radios playing nanny to make sure we don't do anything we're not
supposed
> to.
>
> -
> Julian, G4ILO
> http://www.g4ilo.com/ G4ILO's Shack
> http://www.ham-directory.com/ Ham Directory


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Re: [Elecraft] 6m preamp description??

[Stewart Baker]

I'm ready for another holiday in the US next year, before the UK
economy gets much weaker :-(

73
Stewart G3RXQ
On Sat, 19 Jul 2008 08:45:57 -0700, Jim Brown wrote:
> On Sat, 19 Jul 2008 09:46:56 +0100, Stewart Baker wrote:
>
>> I brought a 6m preamp kit from Down East Microwave.
>>
> They are well respected in the US.
>
>> It cost only slightly more than if I had sourced the components
in
>> the UK.
>>
> Ah, the weak dollar!
>
> 73,
>
> Jim K9YC
>
>
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Re: [Elecraft] 6m preamp description??

[Stewart Baker]

I brought a 6m preamp kit from Down East Microwave.
It cost only slightly more than if I had sourced the components in
the UK. The end result means that now I can hear the K3 noise
level increase when I add an antenna.

73
Stewart G3RXQ
On Fri, 18 Jul 2008 10:33:21 -0700, Jim Brown wrote:
> On Fri, 18 Jul 2008 09:32:42 -0700, Bob Tellefsen wrote:
>
>> I've heard that there is a prototype 6m external preamp
>> being tested.
>>
> I bought an ARR preamp several years ago when I was living in
> Chicago. I patched it into the external antenna "insert" loop
and it
> works well.
>
> 73,
>
> Jim K9YC
>
>
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[Elecraft] Help - K3 Hang up MCU LD

[Stewart Baker]

Shouldn't mess with things !!

In preparation for my KRX3 which is on the way to me, I thought
that I would be clever and load the latest Beta firmware.

The MCU LD crashed, and now I cannot get my K3 to INIT using  the
POWER switch and NORM controls. I sits there with MCU LD message
on the screen.

HELP PLEASE !!.

73
Stewart G3RXQ
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[Elecraft] Re: RF Coupleing

[Stewart Baker]

David,
A very good point. Although the space is rather restricted for
RG58/U it should be possible to fit some of the smaller diameter
cable such as that used to connect between VHF/UHF PCB's.
I have some silver braided coax that would be suitable.

It would have little adverse effect over such a small length, but
might provide additional isolation.

Food for thought...

73
Stewart G3RXQ
On Wed, 16 Jul 2008 12:14:03 -0400, David Robertson wrote:
> Stewart,
> Your posting is good information however one of the factors of
isolation between ANT 1
> and 2 can be how the pigtail leads from the 2
> SO239 connectors and the antenna coupler board are dressed.  It
would seem easy to have
> these nonshielded wires crossing or near each other. The space
seems too tight to use
> rg58/U cable. this could mean that depending how those wires
were dressed the coupling
> would be different between all K3's.
>
> 73
>
> Dave KD1NA
>
>
> From: Stewart Baker <[EMAIL PROTECTED]>
> Subject: Re: [Elecraft] Re: KAT3 ATU and SPE Expert 1K-FA
Amplifier
> To: Dave G4AON <[EMAIL PROTECTED]>,

> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset="ISO-8859-1"
>
> I made some measurements of the isolation between ANT 1 & ANT 2
on
> my K3.
>
> There is little difference between ATU & BYPASS. Unable to do
> 50MHz.
>
> 1.9MHz 58.1dB
> 3.7MHz 51.9dB
> 5.1MHz 49.2dB
> 7.0MHz 47.1dB
> 10MHz 44.7dB
> 14MHz 42.5dB
> 18MHz 40.8dB
> 21MHz 39.2dB
> 24MHz 37.1dB
> 28MHz 35.7dB
>
> So on 60m for 100W from ANT 1 there will be 1mW from ANT 2.
>
> 73
> Stewart G3RXQ


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Re: [Elecraft] Re: KAT3 ATU and SPE Expert 1K-FA Amplifier

[Stewart Baker]

I made some measurements of the isolation between ANT 1 & ANT 2 on
my K3.

There is little difference between ATU & BYPASS. Unable to do
50MHz.

1.9MHz  58.1dB
3.7MHz  51.9dB
5.1MHz  49.2dB
7.0MHz  47.1dB
10MHz   44.7dB
14MHz   42.5dB
18MHz   40.8dB
21MHz   39.2dB
24MHz   37.1dB
28MHz   35.7dB

So on 60m for 100W from ANT 1 there will be 1mW from ANT 2.

73
Stewart G3RXQ

On Tue, 15 Jul 2008 17:45:19 +0100, Dave G4AON wrote:
> Chris
>
> Is this simply an issue of RF being picked up by the antenna
connected
> to the output of the linear, which it would see as reverse RF
whenever
> you transmit directly from your K3 on another antenna?
>
> Also you can measure the RF from ANT2 when transmitting on ANT1
fairly
> easily... On my K3 with 100 Watts out of  ANT1 I cannot measure
anything
> from ANT2, with or without the ATU in use. I tested right up to
50 MHz -
> the lower limit on my power meter is 50 mW.
>
> 73 Dave, G4AON
> K3/100 #80 & Acom 1000
> --
>
> My K3 has the KAT3 ATU fitted and I therefore have the options
of
> selecting ANT 1 and ANT 2. I use the K3 with the SPE Expert
1K-FA
> amplifier.
>
> After looking at the diagram showing the switching of the KAT3
in the
> K3 Owner's manual, am I right in thinking that when transmitting
(I
> am a CW operator), there should not be any RF on the antenna not
> selected?
>
> I use ANT 1 for all my HF antennas, including 6m, and ANT 2 for
a
> resonant inverted vee for 60m that I put up yesterday.
>
> The reason I ask the question above is that when I select ANT 2
(for
> 60m) and transmit, the 1K-FA immediately goes into STANDBY mode
> because of a high SWR.
>
> I am wondering if my KAT3 ATU is working properly? With the KAT3
in
> BYPASS mode (which is how I have been using it for all my HF
> antennas), the K3 SWR meter gives an SWR of 1:1 on 60m, which it
> should do as the antenna is resonant.
>
> When I switch the ATU to the AUTO position on 60m with the same
> antenna and then tap the ATU TUNE button, the K3 makes a similar
> noise to the K2 ATU I have, but does not display any readings.
When
> I then transmit, the SWR meter shows maximum SWR and about 40
watts
> output with the K3 power contrtol set to 100 watts.
>
> I have tested the KAT3 relays using the L1-L8 and C1-C8 and Ct
> settings in the KAT3 CONFIG menu and they appear to be working
ok.
>
> This is the first time I have needed to use the KAT3 ATU or the
ANT
> 1/ANT 2 facility since I got the K3.
>
> I would appreciate any advice or suggestions, please.
>
> Thanks and 73 de Chris, G4BUE
>
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Re: [Elecraft] Switching Supplies

[Stewart Baker]

I believe that all new SEC1223's have the mods fitted.

73
Stewart G3RXQ
On Tue, 08 Jul 2008 14:40:27 +0200, Jan Erik Holm wrote:
> Mike Penkas wrote:
>> I  have 2 SEC1223's and no hash. I also have an Astron RS35 and
RS50
>> linear supplies.  Sometimes the magnetic hum from them drives
me crazy.
>> The little cork pads Astron puts in them to alleviate this
>> does not help much. I keep them under the closed console on the
floor.
>> Mike  WA8EBM
>>
> Sorry to disagree but the SEC1223 is far from quiet. However it
can
> be made much better by modifications. The DC side needs much
better
> filtering, also some work can be done on the AC side.
>
> 73 Jim SM2EKM
>
>
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RE: [Elecraft] Switching supplies and the K3

[Stewart Baker]

Same here. I have two of these supplies, and have yet to hear a
peep of RF noise from them.

73
Stewart G3RXQ
On Mon, 7 Jul 2008 21:50:08 -0400, Bruce McLaughlin wrote:
> I am having very good performance from the SEC 1223 which is the
same supply
> I use with the K2/100.  If it does generate any noise I have yet
to hear it.
>
> Bruce-W8FU
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Thomas
Kuehl
> Sent: Monday, July 07, 2008 5:24 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] Switching supplies and the K3
>
> Hi,
>
> I am back on the Elecraft list after being gone for quite a
while. I have a
> K3/100 coming in the next month or 2, and now I am thinking
about how it is
> best to power it. The K3 has a nice small footprint and that
will be much
> welcomed in my small operating area. And, I don't want to dwarf
the
> available space with a big linear power supply. Therefore, I am
considering
> a switching power supply with its small size as well. Switching
supplies
> have come a long way relative to the RF hash generation issue
and I am
> considering going that route. I sure don't want to degrade the
K3'3
> outstanding performance with a noisy supply, so I am still
cautious.
>
> The eHam reviews for switching supplies provides a lot of
different opinions
> for the various products. One in particular, the Jetstream
JTPS28, seems to
> get high marks from its users. Is anyone on the list using this
particular
> supply to power the K3? If so, what are your impressions of its
performance?
> Or should I skip the switching power supply idea altogether?
>
> Thanks, Thomas - AC7A
>
>
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Re: [Elecraft] [K3] First-time VOX test: It works!

[Stewart Baker]

A little bit of DSP delay works wonders :-)

73
Stewart G3RXQ
On Mon, 07 Jul 2008 11:03:49 -0700, Eric Swartz - WA6HHQ, Elecraft
wrote:
> 'Do' as in 'already do'.. ;-)
> Our current DSL firmware is designed to provide an extremely
fast VOX
> that does not drop much, if any, of the first syllable.
>
> 73, Eric
>
>
> Stewart Baker wrote:
>> Is that "do" do or "can" do ?
>>
>> 73
>> Stewart G3RXQ
>>
>> On Mon, 07 Jul 2008 10:25:32 -0700, Eric Swartz - WA6HHQ,
Elecraft
>> wrote:
>>
>>> DSP based VOX is very cool. :-)  We can do some interesting
 things to avoid
>>> dropped first syllables.


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Re: [Elecraft] [K3] First-time VOX test: It works!

[Stewart Baker]

Is that "do" do or "can" do ?

73
Stewart G3RXQ
On Mon, 07 Jul 2008 10:25:32 -0700, Eric Swartz - WA6HHQ, Elecraft
wrote:
> DSP based VOX is very cool. :-)  We can do some interesting
things to
> avoid dropped first syllables.
>
> Eric  WA6HHQ
>
>
> Stewart Baker wrote:
>> Yup, it's pretty good..
>>
>> 73
>> Stewart G3RXQ
>>
>> On Mon, 7 Jul 2008 09:59:51 -0600, Bill W5WVO wrote:
>>
>>> To those of you SSB ops who won't use VOX because every
implementation of it you've
>>> ever used basically sucked -- Try the K3! I just set it up
using my Heil Pro-Set
>>> forthe first time, and it works just as you think it should.
Very smooth, no
>>> dropped syllables, no falsing -- amazing. It feels effortless,
like the K3's QSK on
>>> CW. This is by far the best VOX I have ever tried.
>>>
>>> Bill W5WVO


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Re: [Elecraft] [K3] First-time VOX test: It works!

[Stewart Baker]

Yup, it's pretty good..

73
Stewart G3RXQ
On Mon, 7 Jul 2008 09:59:51 -0600, Bill W5WVO wrote:
> To those of you SSB ops who won't use VOX because every
implementation of it you've
> ever used basically sucked -- Try the K3! I just set it up using
my Heil Pro-Set for
> the first time, and it works just as you think it should. Very
smooth, no dropped
> syllables, no falsing -- amazing. It feels effortless, like the
K3's QSK on CW. This is
> by far the best VOX I have ever tried.
>
> Bill W5WVO
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Re: [Elecraft] KRX3 Install...choices....

[Stewart Baker]

Thanks Bill,
That was a question I was going to ask :-)

73
Stewart G3RXQ
On Sun, 06 Jul 2008 09:51:23 -0500, ny9h wrote:
> now that I received my katiegram for the second receiverI
have
> read the instructions. Looks like I need to make a decision
whether
> to hook the 2nd rcvr aux in  to the unused ( non- transmitting)
KAT3
> ANT port...
> or the ext BNC..   Since I can't cogitate the correct choice
for
> my "mess o wires"...
> I will read the instruction a few more times, so my first guess
might
> be correct.
>
> I wonder if there is any harm to bringing an extension from the
bnc
> up to near the KAT3 jack...   then when I pick the wrong
> implementation, I only have to pop the lid and move the plug.
> decisions  decisions.   ain't  life swell..
> with such problems
>
> I will read the instruction a few more times, so my first guess
might
> be correct.nc on the back...
>
> Also , I do want to sneak out the 2nd rcvrs "if out" to a bnc on
the backi.
>
> bill   #44
> Who just did a 'K3  show & tell for the Washington, PA  club
meeting
> last Thursday night.
>
>
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Re: [Elecraft] K3: 6m CW Rev

[Stewart Baker]

Pleased it wasn't me losing it.

Whilst  in the memory area, I would like to have the ATU/Bypass
status stored Band by Band.

I have some bands where I use the K3 barefoot, and others where it
goes either to an amplifier or to an external balanced ATU.

Sometimes when changing bands I forget to switch the K3 ATU to the
desired position causing  strange effects.

73
Stewart G3RXQ
On Fri, 04 Jul 2008 17:16:18 -0700, Eric Swartz WA6HHQ - Elecraft
wrote:
> Wayne has fixed this in 2.14 beta. It will be up on the web site
some
> time tomorrow after we do more testing on it.
>
> 73, Eric  WA6HHQ
>
> _..._
>
>
> [EMAIL PROTECTED] wrote:
>> Stewart,
>>
>> I have reproduced the problem on my K3, and I haven't noticed
it before.  I'm running
>> f/w 2.13 and I wonder if that has introduced the problem?
>>
>> Regards
>>
>> Paul M0CVX
>>
>>
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[Elecraft] 6m CW REV

[Stewart Baker]

On 6m if I select the mode as CW, then save and recall from a
memory I get CW REV. Is this correct ?

73
Stewart G3RXQ


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Re: [Elecraft] k3 split/ delta F ?

[Stewart Baker]

Ah Yes..
So it's nearly there. Just a bit more code to allow the delta F to
be displayed for VFO B when Split is selected :-)

73
Stewart G3RXQ
On Thu, 03 Jul 2008 09:39:12 -0700, Brett Howard wrote:
> You can display the RIT offset using the disp menu feature while
tech md
> is on.  Then you can see the delta F in place of the VFO B.  The
only
> downside is that you have to use the small knob to set y our
delta f.
>
>
> On Thu, 2008-07-03 at 12:41 +0100, Stewart Baker wrote:
>> As far as I can see it is not possible at present. It is fairly
>> high on my "should be quick to implement" wish list :-)
>>
>> 73
>> Stewart G3RXQ
>> On Thu, 3 Jul 2008 04:22:59 -0700 (PDT), K3KO wrote:
>>
>>> Anybody figure out if it is possible to display a delta F
value
>> instead of
>>> the actual VFO B frequency when in split?
>>>
>>> I've found that delta F is quite useful.  The actual
frequency,
>> in practice,
>>> is irrelevant in most split cases.
>>>
>>> Made a couple split contacts now on CW.  I like the fact that
>> bset stays on
>>> so one can tune without having to hold it down continuously --
>> like some
>>> Kenwoods and ICOM's require.
>>>
>>> 73 de Brian/K3KO
>>>
>>
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Re: [Elecraft] k3 split/ delta F ?

[Stewart Baker]

As far as I can see it is not possible at present. It is fairly
high on my "should be quick to implement" wish list :-)

73
Stewart G3RXQ
On Thu, 3 Jul 2008 04:22:59 -0700 (PDT), K3KO wrote:
>
> Anybody figure out if it is possible to display a delta F value
instead of
> the actual VFO B frequency when in split?
>
> I've found that delta F is quite useful.  The actual frequency,
in practice,
> is irrelevant in most split cases.
>
> Made a couple split contacts now on CW.  I like the fact that
bset stays on
> so one can tune without having to hold it down continuously --
like some
> Kenwoods and ICOM's require.
>
> 73 de Brian/K3KO


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Re: [Elecraft] K3 6-meter Performance Question

[Stewart Baker]

I have just finished putting together, and testing a 6m preamp kit
from Down East Microwave. As I use the RX Ant input on the lower
bands, and not wanting to put in a relay, I have made up a
Diplexer to separate out the 2 signal paths.

Although the arrangement is a bit of a lash up it has proved the
concept, and it's worth during a short 6m opening the other
evening.

Without the preamp I noticed no discernible different in the K3
noise level when connecting the antenna. With the preamp I get
about an S2-3 indication.

More importantly signals which were there but not readable, with
the preamp they gave 100% copy.

I think that my present preamp gain at around 22dB  is a little
excessive, so I will drop it back to about 15dB or so.

Before I get swamped with requests etc, I should stress that my
arrangement is not really reproducible, and you should wait until
Elecraft releases their preamp solution.

Y.M.M.V

73
Stewart G3RXQ


On Thu, 3 Jul 2008 08:50:03 +0100, Ian White GM3SEK wrote:
> On Tuesday, Dick K5AND wrote:
>
>> Ciao, from CY0X, Sable Island.
> [...]
>
>> Since it is so easy to switch out the outboard preamp, we have
frequently
>> done this on some of the weak sigs just to see if we could
still hear them.
>> In many cases we could hear them Q5 with just the internal
preamp. Ian,
>> GM3SEK, et al, have pointed out that the stock radio NF is
somewhere in the
>> 8-10db range, which is not stellar as six meter radio specs go.
Nonetheless,
>> you'd be surprised at how many weak sigs we can still hear with
only the
>> internal preamp engaged.
>>
> That's not surprising at all, as the K3 is only slightly lacking
in
> sensitivity on 6m. But contrary to other reports from users in
very
> quiet sites, my stock K3 can NOT hear background noise at 50MHz.
>
> Before making that statement, I took a couple of days to confirm
that
> nothing else is wrong with the system. Receiver sensitivity
meets
> Elecraft's 'typical' specification with a few dB to spare.
Feeder loss
> was re-measured. And above all, I re-confirmed that my old
IC-746 CAN
> hear background noise from the same antenna/feedline with a
comfortable
> 3-5dB margin.
>
> A good operator like Dick can often make up for a few dB lacking
in
> signal/noise ratio... but only at the expense of greater
operator
> fatigue, and with the knowledge that some marginal QSOs *will*
be lost,
> when a more sensitive receiver could have pulled them through.
That is
> precisely why the receiver at CY0X has a prototype Elecraft
preamp.
>
> One small correction: Elecraft's specification for a typical MDS
(noise
> floor) of -136dBm in a noise bandwidth of 500Hz corresponds to a
noise
> figure of about 13dB (significantly more than 8-10dB). Cutting
through
> the technicalities, at a genuinely quiet 6m site that deficit
*is*
> noticeable - a gap in the K3's otherwise all-round excellence.


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RE: [Elecraft] KRX3 is shipping ! ! !

[Stewart Baker]

My advisory came today - shipping in 2 weeks.
Should be up and running (not sure about the op! ), in plenty of
time for CQWW.

73
Stewart G3RXQ
K3 #307

On Wed, 2 Jul 2008 21:34:05 -0500, Nelson Moyer wrote:
> Thanks, and please keep the KRX3 advisories coming so I can
predict when my
> September 2007 order is likely to ship.
>
> Nelson, KU0A
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Van W1WCG
> Sent: Wednesday, July 02, 2008 3:21 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] KRX3 is shipping ! ! !
>
>
> Greetings, all :--
>
> Got the long-awaited Katiegram for the KRX3 ordered 4/27/07,
due
> to be shipped within 2 weeks, etc.
>
> Yaay
>
> 73, Van W1WCG
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