[Elecraft] K2 VCO Alignment problem

[Robert Greenwalt]

Hi

I've worked my way through assembling my k2 and I've reached a problem:
 Everything seems fine until the 4000 kHz, R30 -> 6V alignment of L30.  I
can only reach 5.65V.  I have verified D23-26 are the right part, oriented
correctly.  I have verified D21-22 are the right part and oriented
correctly.  I've counted wires entering the center of T5 (16 and 4).  I have
verified the all the caps in VFO and VFO Range Selection (except C75, which
is missing in my version).

Searching the web I find lots of info about what to do if the voltage
doesn't vary and lots of hints about what to check if the voltage is too
high.  Any suggestions if the left side of R30 varies from 1.87V up to
5.65V?

Oh - and a separate K2 question - my flip-down tilt stand metal piece seems
too wide for the width of the feet: the plastic feet that get bolted to the
base end up 12.7 cm apart but the bent metal piece is about 14 cm wide at
the corresponding part.  I expect some spring, but I'm having trouble
compressing it enough to fit and I wonder if this is normal..

Thanks

Robert (K6RJG)
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Re: [Elecraft] K2 #6815 - VFO Linearization CAL PLL Info 232

[Gary W. Marklund]

Don,

Well, with egg on face ...

When I went to try your last suggestion, the K2 gave me a low battery 
indication and would go no further. I did a short recharge and the CAL 
PLL procedure is running as expected.

Sorry to have bothered you with this, but thanks for your help.

Gary

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Re: [Elecraft] KRC2: VFO aware?

[Don Wilhelm]

Brian,

If by "TX VFO" you mean the band of operation, then the answer is yes.
If you mean the frequency within a band, then the answer is that the 
output of the KRC2 will be the same throughout any one band.

73,
Don W3FPR

Brian Machesney wrote:
> I'm considering a KRC2 purchase. Can the KRC2 control outputs based on the
> TX VFO?
>   
>
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[Elecraft] KRC2: VFO aware?

[Brian Machesney]

I'm considering a KRC2 purchase. Can the KRC2 control outputs based on the
TX VFO?

-- 
73 -- Brian -- K1LI
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Re: [Elecraft] K2 #6815 - VFO Linearization CAL PLL Info 232

[Don Wilhelm]

Gary,

OK, it may be C71 - my memory is not perfect and I don't have access to 
the schematics here while on vacation.
Plug the internal counter probe into TP1 and check the frequency with 
CAL FCTR.  If you are tuned to 7100 kHz, the counter should read close 
to 12015 kHz.

You might also want to re-check the PLL Reference oscillator range 
(probe in TP3).

73,
Don W3FPR

Gary W. Marklund wrote:
> Don,
>
> Yes, I did all that. Just checked it. My instructions say it is C71 not 
> C73 that is changed. Other than that, all is as you say.
>
> Gary
>   

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Re: [Elecraft] K2 #6815 - VFO Linearization CAL PLL Info 232

[Gary W. Marklund]

Don,

Yes, I did all that. Just checked it. My instructions say it is C71 not 
C73 that is changed. Other than that, all is as you say.

Gary

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Re: [Elecraft] K2 #6815 - VFO Linearization CAL PLL Info 232

[Don Wilhelm]

Gary,

Since you are using the Rework Eliminators, did you add the Rework 
eliminator for the K60XV and add D19 and D20 as well as change the value 
of C73? from 82 pF to 120 pF?  If so, you must follow the instruction to 
set the secondary menu parameter for D19 to "y".  Failure to do that 
will result in an incorrect VFO frequency on 40 meters, with a resulting 
failure for CAL PLL.  All that is despite the fact that the displayed 
frequency says it is on the 40 meter band - it actually is not.

73,
Don W3FPR


Gary W. Marklund wrote:
> Subject line says it. Everything has gone perfectly until I hit this. 
> Manual says I'm probably not on 40 M. VFO says 7030.00. Only 
> non-standard part of build is that I'm using the UnMods kit for all 
> options as well as their Internal Microphone Adaptor. All measurements 
> have been amazingly spot on.
>
>   
>
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Re: [Elecraft] [K3] Clicking in Headphones When Adjusting Shift/Width Controls

[Guy Olinger K2AV]

Reported and being addressed. 73, Guy.

On Thu, Oct 22, 2009 at 4:16 PM, tom_k1tl  wrote:

> Hi Gang,
>
> I just noticed whenever I turn the shift/width controls, I hear a clicking
> in my heaphones as if a relay is being activated at every detent.
>
> I have fw3.44 installed at present. Has anybody else noticed this? If this
> has been addressed, sorry for the bandwidth.
>
> Mni tks,
> 73
> Tom/k1tl...
>
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[Elecraft] K2 #6815 - VFO Linearization CAL PLL Info 232

[Gary W. Marklund]

Subject line says it. Everything has gone perfectly until I hit this. 
Manual says I'm probably not on 40 M. VFO says 7030.00. Only 
non-standard part of build is that I'm using the UnMods kit for all 
options as well as their Internal Microphone Adaptor. All measurements 
have been amazingly spot on.

Any ideas?

Thanks,

Gary KJ7RT

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Re: [Elecraft] Diversity?

[DM4iM]

Guys, found all the info i need.

Thanks.


-- 

73, DM4iM
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[Elecraft] [K3] Clicking in Headphones When Adjusting Shift/Width Controls

[tom_k1tl]

Hi Gang,

I just noticed whenever I turn the shift/width controls, I hear a clicking 
in my heaphones as if a relay is being activated at every detent.

I have fw3.44 installed at present. Has anybody else noticed this? If this 
has been addressed, sorry for the bandwidth.

Mni tks,
73
Tom/k1tl... 

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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Bill K9YEQ]

Windy,

I usually push the ATU tune whenever I change bands but have never relied
upon the tuner to manage.

Here's the manual:

ATU (KAT3)
If you have the KAT3 antenna tuner installed, you
can select ANT1 or ANT2 by tapping ANT .
Hold ATU to select AUTO (autotune enabled) or
BYPASS. If the ATU icon is on, the antenna can
be matched for best SWR by tapping ATU TUNE .
Up to 30 ATU settings are saved for both antennas
on every band. The ATU icon will flash briefly
whenever new settings are automatically loaded.
Tapping ATU TUNE a second time within 5
seconds of a match attempt will retry using a more
extensive search. This may improve the match
when using high-SWR or narrow-band loads.

I don't believe this answers the question as to when the tuner invokes an
automatic retune, however.


73,

Bill
K9YEQ


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KM5Q
Sent: Thursday, October 22, 2009 2:02 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

Sure Bill. When feedline is wet, I alter some band segments by  
retuning as needed, as I operate. Then when dry, I encounter the re- 
tuned segments again when I encounter a high-SWR after I QSY. So then  
I re-tune, of course. As far as I can observe, that seems to wipe out  
the "wet" setting that was recorded at some nearby frequency. Seems  
OK. I just have to accept that I don't know where the segments are,  
and so I keep an eye on the SWR when I QSY (normal habit anyway).

I'll await any more helpful info from the creators. I accept that it  
may be simple "just keep doing what you are doing". It isn't a  
problem, I'll await any further understanding of the rules that the  
ATU memories follow.

Thanks  /  Windy KM5Q


Bill K9YEQ wrote:
Thu, 22 Oct 2009 08:09:57 -0700

> Your feedline impedance changes when wet and the memory will change  
> in the
> tuner.  I would expect that is quite normal and a good thing!
>
>
> 73,
>
> Bill
> K9YEQ
> K2 #35; KX1 #35; K3 #1744; mini mods
> ATS-3B
>
> -Original Message-
> Subject: Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial
>
> Fellows,
> I'm not asking you to go off-topic with advice on my feedline. I'm
> asking only about the behavior of the ATU memory system after I've
> retuned a few band segments to wet condx, then condx return to dry.
>
> Thanks
> Windy
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[Elecraft] [K3] K3 Diversity Receive

[Joe G]

I am in the process of setting up a diversity receive configuration with the
subreceiver.  I usually run about 600 watts. All my antennas are
horizontally polarized; an E-W 160M Carolina Windom, a N-S Carolina Windom
and a tri-bander yagi

Can any one give me some guidelines about suggested physical separations
between antennas ?



-
Joe
W1JGS
-- 
View this message in context: 
http://n2.nabble.com/K3-Diversity-Receive-tp3874333p3874333.html
Sent from the [K3] mailing list archive at Nabble.com.
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[KM5Q]

Sure Bill. When feedline is wet, I alter some band segments by  
retuning as needed, as I operate. Then when dry, I encounter the re- 
tuned segments again when I encounter a high-SWR after I QSY. So then  
I re-tune, of course. As far as I can observe, that seems to wipe out  
the "wet" setting that was recorded at some nearby frequency. Seems  
OK. I just have to accept that I don't know where the segments are,  
and so I keep an eye on the SWR when I QSY (normal habit anyway).

I'll await any more helpful info from the creators. I accept that it  
may be simple "just keep doing what you are doing". It isn't a  
problem, I'll await any further understanding of the rules that the  
ATU memories follow.

Thanks  /  Windy KM5Q


Bill K9YEQ wrote:
Thu, 22 Oct 2009 08:09:57 -0700

> Your feedline impedance changes when wet and the memory will change  
> in the
> tuner.  I would expect that is quite normal and a good thing!
>
>
> 73,
>
> Bill
> K9YEQ
> K2 #35; KX1 #35; K3 #1744; mini mods
> ATS-3B
>
> -Original Message-
> Subject: Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial
>
> Fellows,
> I'm not asking you to go off-topic with advice on my feedline. I'm
> asking only about the behavior of the ATU memory system after I've
> retuned a few band segments to wet condx, then condx return to dry.
>
> Thanks
> Windy
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Re: [Elecraft] New W2 manual on web site

[Edward Dickinson, III]

Eric - Thanks for the update.


Best regards,

Dick - KA5KKT

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[Elecraft] Elecraft email List Official Guidelines [Sept 2009]

[Eric Swartz - WA6HHQ, Elecraft]

Elecraft Mail LIST GUIDELINES [Sept. 2009]

For those of you who are new to the list, (and for those of us who have
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Bill K9YEQ]

See Pg 66.


73,

Bill
K9YEQ


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Julius Fazekas
Sent: Thursday, October 22, 2009 12:16 PM
To: k...@mac.com
Cc: Elecraft Discussion List
Subject: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

Windy,

The latest QST has an article on window feed line that discusses this very
topic
Julius Fazekas
N2WN


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[Elecraft] [K3] swr anomaly

[O. Johns]

Folks,

Did the Xmtr power alignment with utility version 1.2.9.30 and  
firmware version 3.44.  Used the BL2 balun connected directly to the  
Ant1 port of the K3, using only straight-through adapters and no  
cable.  The five watt calibration ran to completion and all was well.   
BUT, after the calibration, I find that pressing and holding TUNE with  
the ATU in bypass mode now gives a swr of 1.1.  Before the  
calibration, it always gave 1.0.  I know this is a small point, since  
1.1 and 1.0 are only negligibly different.  But it bothers me,  
aesthetically.

Anyone have any idea how to fine-tune the swr reading on the K3?  I  
recall that on the K2, you adjusted the balance to do this.  But on  
the K3?  Seems that since the K3 was aligned using the BL2 as its  
reference, the BL2 should show 1.0 swr.  Not so?

73,
Oliver Johns
W6ODJ
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Bob Nielsen]

Wes, N7WS has a paper on window line which is much more informative:  
.

Bob, N7XY

On Oct 22, 2009, at 10:15 AM, Julius Fazekas wrote:

> Windy,
>
> The latest QST has an article on window feed line that discusses  
> this very topic
> Julius Fazekas
> N2WN
>
> Tennessee Contest Group
> http://www.k4ro.net/tcg/index.html
> http://groups.google.com/group/tcg1?hl=en
>
> Tennessee QSO Party
> http://www.tnqp.org/
>
> Elecraft K2/100 #4455
> Elecraft K3/100 #366
> Elecraft K3/100 #1875
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[The Smiths]

I know someone that drives a bus for a living..
 
WHAT DOES ANY OF THIS HAVE TO DO WITH THE GUYS QUESTION. He had a VERY simple 
question. Just answer it if you know, if not, save your science lessons for 
those that actually want to talk about that off the reflector!  Some times you 
CAN be too smart for your own good. Guys, You don't always have to answer 
EVERYTHING just because you think you can.


 
> Date: Thu, 22 Oct 2009 15:05:37 +0100
> From: d.cut...@ntlworld.com
> To: k...@mac.com; gm4...@btinternet.com; daleput...@hotmail.com
> CC: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial
> 
> I've heard that some folks rub silicone furniture polish on the ladder line 
> to keep moisture from settling, then dust, mud, etc doesn't stick.
> 
> David
> G3UNA
> 
>  Geoffrey Mackenzie-Kennedy  wrote: 
> > Dale, I suspect that in Windy's case moisture could be entering via tiny 
> > holes drilled in the dielectric by windblown sand or dust. Unfortunately I 
> > cannot offer any practical solution to prevent this happening, because I do 
> > not use window line.
> > 
> > 4 wire open wire feeder behaves like a lovesick octopus unless kept under 
> > tension. A very useful type of low cost feeder for long low loss horizontal 
> > runs at HF and VHF though.
> > 
> > 73,
> > Geoff
> > GM4ESD
> > 
> > 
> > Dale Putnam wrote on Thursday, October 22, 2009 1:01 PM
> > 
> > Geoff has touched on what may be happening. I've seen this on my systems 
> > here too... and the issue comes down to the material, in this case mud or 
> > water and dust... collecting on the feeder, then as the moisture drys away, 
> > the change in transmission line characteristics also change. There are a 
> > whole page of math equations and figures that prove this, but suffice it to 
> > say for now, that open wire, doesn't have this issue... it has others... 
> > more physical, like how to keep it spaced and installed correctly.
> > Retuning isn't a real problem, it is pretty much just adjusting for what 
> > the moisture is changing. However... be watchful for the moisture changes 
> > to 
> > not go away completely then go look for where the moisture isn't 
> > leaving 
> > and find an opening in the insulation, and repair it, before the feedline 
> > becomes damaged too much by the moisture invasion.
> > Still beats coax for losses.
> > 
> > --... ...-- Dale - WC7S in Wy
> > 
> > 
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[David Gilbert]

Yes, and it is a quite poorly done article with various procedural 
errors and measurement inconsistencies.  I recommend you ignore it.  See 
the message thread initiated by W8JI in the Elmers forum on eHam for 
more discussion about it.

73,
Dave   AB7E



Julius Fazekas wrote:
> Windy,
>
> The latest QST has an article on window feed line that discusses this very 
> topic
> Julius Fazekas
> N2WN
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Re: [Elecraft] New W2 manual on web site

[K2QI]

Hi Eric,

Thanks for the link to the manual. Looks like another fine product.  Any
news on a more specific release date?

73 de James K2QI

On Thu, Oct 22, 2009 at 12:49 PM, Eric Swartz - WA6HHQ, Elecraft <
e...@elecraft.com> wrote:

> We've updated the W2 manual on the web site.
>
> http://www.elecraft.com/K2_Manual_Download_Page.htm#w2
>
> 73, Eric
>
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[Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Julius Fazekas]

Windy,

The latest QST has an article on window feed line that discusses this very topic
Julius Fazekas
N2WN

Tennessee Contest Group
http://www.k4ro.net/tcg/index.html
http://groups.google.com/group/tcg1?hl=en

Tennessee QSO Party
http://www.tnqp.org/

Elecraft K2/100 #4455
Elecraft K3/100 #366
Elecraft K3/100 #1875
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[Elecraft] New W2 manual on web site

[Eric Swartz - WA6HHQ, Elecraft]

We've updated the W2 manual on the web site.

http://www.elecraft.com/K2_Manual_Download_Page.htm#w2

73, Eric

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Re: [Elecraft] k3 50Hz background noise

[Igor Sokolov]

The problem is solved. I thought I have to share  with others what worked
best or us. This solution came from Gary N7IR.

Try a few sheets of thin low carbon steel (in US called mild steel)
insulated from each other by sheets of printer paper.  Put this sandwich in
between and parallel to the K3 and the rotator controller.  That should
knock it down by many 10's of dB if it is magnetic coupling.  Make sure that
the sheets are as long as the case of K3 and twice as tall.  Also make sure
the sheets don't touch either case.  I've used this technique many times in
my professional life and it works every time.

Thank you Gary and thanks to all for alternative suggestions

73, Igor UA9CDC

>
> > My friend, K3 user is getting ready for CQWW SSB. In his
> > installation the
> > rotator control box that has pretty large transformer
> > inside.  The box is
> > only few inches away from one of the two K3s  and cannot
> > be moved. He has
> > discovered that magnetic field created by this transformer
> > interacts with
> > the AF transformer (Line in) in K3. The indused 50Hz noise
> > is only 20db down
> > from the audio signal. The noise is gone when line in is
> > switched off in the
> > menu but that leaves him without voice keyer which is
> > tough to be deprived
> > of in 48 hours SSB contest. Has anybody found a solution
> > yet. He now thinks
> > of taking the transformers out of the radio an bypassing
> > them. He thinks
> > that the problem roots to the fact that the K3 cabinet is
> > made of aluminum.
> >
> > 73, Igor UA9CDC

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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Bill K9YEQ]

Your feedline impedance changes when wet and the memory will change in the
tuner.  I would expect that is quite normal and a good thing!


73,

Bill
K9YEQ
K2 #35; KX1 #35; K3 #1744; mini mods
ATS-3B

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Windy Dankoff
Sent: Thursday, October 22, 2009 9:02 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

Fellows,
I'm not asking you to go off-topic with advice on my feedline. I'm  
asking only about the behavior of the ATU memory system after I've  
retuned a few band segments to wet condx, then condx return to dry.

Thanks
Windy



On Oct 22, 2009, at 7:03 AM, Geoffrey Mackenzie-Kennedy wrote:

> Dale, I suspect that in Windy's case moisture could be entering via  
> tiny holes drilled in the dielectric by windblown sand or dust.  
> Unfortunately I cannot offer any practical solution to prevent this  
> happening, because I do not use window line.
>
> 4 wire open wire feeder behaves like a lovesick octopus unless kept  
> under tension.  A very useful type of low cost feeder for long low  
> loss horizontal runs at HF and VHF though.
>
> 73,
> Geoff
> GM4ESD
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[d.cutter]

I've heard that some folks rub silicone furniture polish on the ladder line to 
keep moisture from settling, then dust, mud, etc doesn't stick.

David
G3UNA

 Geoffrey Mackenzie-Kennedy  wrote: 
> Dale, I suspect that in Windy's case moisture could be entering via tiny 
> holes drilled in the dielectric by windblown sand or dust. Unfortunately I 
> cannot offer any practical solution to prevent this happening, because I do 
> not use window line.
> 
> 4 wire open wire feeder behaves like a lovesick octopus unless kept under 
> tension.  A very useful type of low cost feeder for long low loss horizontal 
> runs at HF and VHF though.
> 
> 73,
> Geoff
> GM4ESD
> 
> 
> Dale Putnam wrote on Thursday, October 22, 2009 1:01 PM
> 
> Geoff has touched on what may be happening. I've seen this on my systems 
> here too... and the issue comes down to the material, in this case mud or 
> water and dust... collecting on the feeder, then as the moisture drys away, 
> the change in transmission line characteristics also change. There are a 
> whole page of math equations and figures that prove this, but suffice it to 
> say for now, that open wire, doesn't have this issue... it has others... 
> more physical, like how to keep it spaced and installed correctly.
>   Retuning isn't a real problem, it is pretty much just adjusting for what 
> the moisture is changing. However... be watchful for the moisture changes to 
> not go away completely then go look for where the moisture isn't leaving 
> and find an opening in the insulation, and repair it, before the feedline 
> becomes damaged too much by the moisture invasion.
>  Still beats coax for losses.
> 
> --... ...-- Dale - WC7S in Wy
> 
> 
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Windy Dankoff]

Fellows,
I'm not asking you to go off-topic with advice on my feedline. I'm  
asking only about the behavior of the ATU memory system after I've  
retuned a few band segments to wet condx, then condx return to dry.

Thanks
Windy



On Oct 22, 2009, at 7:03 AM, Geoffrey Mackenzie-Kennedy wrote:

> Dale, I suspect that in Windy's case moisture could be entering via  
> tiny holes drilled in the dielectric by windblown sand or dust.  
> Unfortunately I cannot offer any practical solution to prevent this  
> happening, because I do not use window line.
>
> 4 wire open wire feeder behaves like a lovesick octopus unless kept  
> under tension.  A very useful type of low cost feeder for long low  
> loss horizontal runs at HF and VHF though.
>
> 73,
> Geoff
> GM4ESD
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Re: [Elecraft] K3 Audio Volume

[Tom Hammond]

Gary:

NEXT TIME it occurs, and BEFORE you do anything 
else, find a signal and not the S-meter 
reading.  THEN re-cycle whatever must be recycled 
to obtain the expected audio output level and 
THEN re-check the S-meter. If the signal level 
has not changed, then the problem is (most 
probably) in the AF section. If the signal is now 
reading higher on the S-meter, then the problem is RF-related.

73,

Tom Hammond   N0SS

At 01:01 10/22/2009, you wrote:
>Hi
>
>Again today I had soft audio when I turned the K3 on.
>
>I pressed the ATU button and the volume became 
>loud and has remained at that level.
>
>Here are the settings.
>
>7.102.00 LSB
>Width. 2.50
>FC 0.50
>Hi. 1.75
>LO. 0.00
>Filter 2.1 8 pole
>(Others installed are also 8 pole 13,6,2.8 and 400)
>Antenna is 80M full wave loop and has a 1.2:1 dip on this frequency)
>AF knob was at quarter PAST the hour as the 
>audio is generally very low and has been for a long time.
>
>After the change in volume it sounds great at the 11 o'clock position.
>
>FW ver 3.41
>
>Hope this helps someone figure out what may be 
>causing this up/down audio change.
>
>K3/100 #679
>
>73's
>Gary
>VK4WT/P
>Sent via BlackBerry® from Telstra
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Geoffrey Mackenzie-Kennedy]

Dale, I suspect that in Windy's case moisture could be entering via tiny 
holes drilled in the dielectric by windblown sand or dust. Unfortunately I 
cannot offer any practical solution to prevent this happening, because I do 
not use window line.

4 wire open wire feeder behaves like a lovesick octopus unless kept under 
tension.  A very useful type of low cost feeder for long low loss horizontal 
runs at HF and VHF though.

73,
Geoff
GM4ESD


Dale Putnam wrote on Thursday, October 22, 2009 1:01 PM

Geoff has touched on what may be happening. I've seen this on my systems 
here too... and the issue comes down to the material, in this case mud or 
water and dust... collecting on the feeder, then as the moisture drys away, 
the change in transmission line characteristics also change. There are a 
whole page of math equations and figures that prove this, but suffice it to 
say for now, that open wire, doesn't have this issue... it has others... 
more physical, like how to keep it spaced and installed correctly.
  Retuning isn't a real problem, it is pretty much just adjusting for what 
the moisture is changing. However... be watchful for the moisture changes to 
not go away completely then go look for where the moisture isn't leaving 
and find an opening in the insulation, and repair it, before the feedline 
becomes damaged too much by the moisture invasion.
 Still beats coax for losses.

--... ...-- Dale - WC7S in Wy





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[Elecraft] 3.44 Beta

[David Robertson]

Julian and All,

When operating in PSK mode and having the K3 in DATA A mode I had no RF output 
I noticed there was no ALC bars at all indicating no audio present from the 
computer. Turning up the K3 Mic gain (line in on data modes) there was no 
increased bar indication indicating no audio in from the computer. Returning 
the K3 mic gain (line input) to the correct value and switching the K3 mode to 
USB, then back to DATA A mode produced both the ALC bars and RF out.  When I 
transmit it takes about 15 to 20 seconds for the K3 to adjust the RF out to the 
correct value.

When I operate using the USB mode with 3.44 installed (requireing selection of 
line input and eliminating any compression) the K3 responces very well and only 
takes between 1 to 3 seconds to adjust power out.

During all of this no adjustments to the computer's audio out were made.

Reinstalling 3.42 firmware eliminates any problems in DATA A mode.

I will run more tests later as I have a ton of leaves to rake.

73
Dave KD1NA
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Dale Putnam]

Geoff has touched on what may be happening. I've seen this on my systems here 
too... and the issue comes down to the material, in this case mud or water and 
dust... collecting on the feeder, then as the moisture drys away, the change in 
transmission line characteristics also change. There are a whole page of math 
equations and figures that prove this, but suffice it to say for now, that open 
wire, doesn't have this issue... it has others... more physical, like how to 
keep it spaced and installed correctly. 

  Retuning isn't a real problem, it is pretty much just adjusting for what the 
moisture is changing. However... be watchful for the moisture changes to not go 
away completely then go look for where the moisture isn't leaving and find 
an opening in the insulation, and repair it, before the feedline becomes 
damaged too much by the moisture invasion.

 Still beats coax for losses. 

--... ...-- Dale - WC7S in Wy


 
> From: gm4...@btinternet.com
> To: k...@mac.com
> Date: Thu, 22 Oct 2009 11:53:53 +0100
> CC: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial
> 
> Windy,
> 
> What sort of arrangement are you using to connect the feeder to the antenna?
> 
> Do you get a lot of wind-blown dust / sand during the dry weather, some of 
> which might be staying on the feeder until most is washed off by rain.
> 
> 73,
> Geoff
> GM4ESD
> 
> 
> Windy KM5Q wrote on Thursday, October 22, 2009 at 4:38 AM
> 
> > Here's another question: I have a dipole with 200 feet of window-line
> > feed. It works great with the ATU. When it's wet, I have to re-tune,
> > then it's fine again.
> >
> > I've tuned it at lots of spots in some favorite bands during dry
> > weather (most of the time in New Mexico). But on a rainy day, I end up
> > retuning frequencies here and there. Next sunny day, does the system
> > detune me when I run into a previously "wet-tuned" segment?
> >
> > Oddly, I haven't observed this, but I don't understand why.
> >
> > Windy KM5Q
> 
> 
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Re: [Elecraft] K3 KAT3 Antenna Tuner Tutorial

[Geoffrey Mackenzie-Kennedy]

Windy,

What sort of arrangement are you using to connect the feeder to the antenna?

Do you get a lot of wind-blown dust / sand during the dry weather, some of 
which might be staying on the feeder until most is washed off by rain.

73,
Geoff
GM4ESD


Windy KM5Q wrote on Thursday, October 22, 2009 at 4:38 AM

> Here's another question:  I have a dipole with 200 feet of window-line
> feed. It works great with the ATU.  When it's wet, I have to re-tune,
> then it's fine again.
>
> I've tuned it at lots of spots in some favorite bands during dry
> weather (most of the time in New Mexico). But on a rainy day, I end up
> retuning frequencies here and there. Next sunny day, does the system
> detune me when I run into a previously "wet-tuned" segment?
>
> Oddly, I haven't observed this, but I don't understand why.
>
> Windy KM5Q


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[Elecraft] Diversity?

[DM4iM]

Elecrafters,
I'm preparing for the CQ-WW-SSB and would like to play with diversity.

We have:
 1 K3 with sub-rx.
 1 K3 with sub-rx plus Transverter-board (my own)
 2 yagis for the higher bands.
 1 loop for 80m (local)
 1 GAP Voyager for 160/80/40
 1 shunt fed tower for 160

No KAT3 in either K3.

How to route the antennas?

Martin

-- 

73, DM4iM
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[Elecraft] K3 Configuration for the SignaLinkUSB " interface for PSK31

[TA2AH]

Hi,
Does anyone have Tigertronics "SignaLink USB" interface uses with K3?
I need help to configure my K3 (Serial # 1230) to use with my "SignaLink USB" 
interface for mainly PSK31.  
I am using the new SignaLink radio cable to connect it to my K3, which connects 
to the K3's rear panel Line In, Line Out, and PTT jacks.
Any help would be appreciated.

73's
Ruchan Ozatay
TA2AH


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Re: [Elecraft] K3 Audio Volume

[The Smiths]

What is your SWR before the ATU tuned the antenna?  Perhaps you have low volume 
because you're running with a 12:1 SWR?
 
> To: Elecraft@mailman.qth.net
> From: rfenab...@gmail.com
> Date: Thu, 22 Oct 2009 06:01:51 +
> Subject: [Elecraft] K3 Audio Volume
> 
> Hi
> 
> Again today I had soft audio when I turned the K3 on.
> 
> I pressed the ATU button and the volume became loud and has remained at that 
> level.
> 
> Here are the settings.
> 
> 7.102.00 LSB
> Width. 2.50
> FC 0.50
> Hi. 1.75
> LO. 0.00
> Filter 2.1 8 pole
> (Others installed are also 8 pole 13,6,2.8 and 400)
> Antenna is 80M full wave loop and has a 1.2:1 dip on this frequency)
> AF knob was at quarter PAST the hour as the audio is generally very low and 
> has been for a long time.
> 
> After the change in volume it sounds great at the 11 o'clock position.
> 
> FW ver 3.41
> 
> Hope this helps someone figure out what may be causing this up/down audio 
> change.
> 
> K3/100 #679
> 
> 73's
> Gary
> VK4WT/P
> Sent via BlackBerry® from Telstra
> __
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