Re: [Elecraft] KAT500 Remote Version

[Arie Kleingeld PA3A]

Dave,

I always use TL Details whicj can be downloaded here at wbsite of AC6LA 
: http://www.ac6la.com/tldetails.html

It is easy to use.
Choose the cable that you are using, set the frequency, set the line 
length and set an estiimate of the impedance at the load.
If you donot know that and your swr meter says 1:3, then set R tot 150. 
This makes the program calculate with SWR 3

Then you can read the loss and some other nice things  from this very 
nice little tool.
It has been on my computers for a very long time, and has become a 
standard program for me to install on my computer.

73
Arie PA3A



Op 20-9-2012 21:59, David Bunte schreef:
>
> It was suggested that the TLW program by N6BV, that is packaged with the
> ARRL Antenna Book would help, but I have not been able to figure out how to
> use it, and can find no instructions for that program.
>
> Any and all help will be appreciated.
>
> Dave - K9FN
>
>
>

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[Elecraft] KX3 ACC1 interface - logic signal levels - what is "official" Elecraft standard for this ?

[Brian Lodahl OZ2BRN]

Hi Kx3 users,

Other posts have previously dealt with the issue that the standard KXUSB 
cable for Kx3 does not support CW keying from the computer to the Kx3 
radio, simply from the fact that as opposed to the ordinary serial 
connection (old RS-232 standard), the RTS and CTS pins are not available 
in the 3.5 mm, three-pin TRS jack connector for ACC1 in the Kx3.

Pursuing this further, and not wanting to have more than one USB cable 
to my PC from my Kx3 for all of my buisness on the PC side, I want now 
to build a new interface cable using a custom cable assembly from FTDI:

http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm

Then using either RTS or CTS flags in my PC's radio interface setup (log 
program Win-Test) to pull the CW key connection in the Kx3, possibly via 
a FET or Opto Coupler.

- I have a 4N25 in mind for this ... with parallel coupling of two 
1N5711 to the paddle dit's and dah's.
I did the very same thing on my K2, and it worked like a charm.

Checking the signal levels on my oscilloscope today on the ACC1 data 
connection, I find:

Tip connection = Rx data from the computer to the Kx3 = 5,0 - 5,2 volts 
level (generated by the FTDI line driver)
Ring connection = Tx data to the computer from the Kx3 = 7,0-7,5 volts 
level (generated by the Kx3 line driver)
both with respect to GND being the sleeve pin of the ACC1 jack plug, and 
looking pretty, noise-free and free of any transients. Good, nice square 
signals with good integrity.

Baud rate of the data here is obviously configurable, and with your PC's 
logging program so is the polling rate of how often the PC requests data 
from the Kx3.

My question :What is the "official" Elecraft electrical specifications 
for the ACC1 interface ???
What voltage levels for Rx and Tx, respectively, and what impedance to I 
terminate with when I interface with e.g. opto coupler for my project ?

Would I be OK assuming I just use a 5-volt TTL-level cable version here, 
both ways Rx+Tx OK ?

TTL-232R-5V:
http://www.ftdichip.com/Support/Documents/DataSheets/Cables/DS_TTL-232R_CABLES.pdf
 


73'
Brian OZ2BRN
Kx3 # 1118, K2 # 6936 (to which I did the same mod)
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[Elecraft] Balun Ground Connection

[zendoc]

Hi Rich,

This DXE balun is just a hefty 1:1 choke balun  It's a high grade
coax (50ohm) wrapped through ferrite cores.  The balanced terminals
are floating and the unbalanced end is connected to the aluminium
housing and the shield of the 6 foot length of RG213 coax which
connects the balun and my tuner.  I have a balun inside my tuner too,
but I don't use it:  it's a 4:1 current balun and in this application
with a multi-band loop,   I prefer to use the external 1:1 balun.

I agree - with my loop , anything that changes the feedline length,
even by smallish amounts, alters the impedance seen by the tuner at
the end of the line and the manual tuner settings change on (usually)
multiple bands and the KAT3 has to reconfigure its LC settings.  I
expected that, as a function of the impedance transforming effect of
the feedline, but what I didn't expect was the very significant
difference that different  shack "grounding" arrangements would make
to the whole process of matching the antenna system at the shack end
of the feedline.

About the common mode current that I'm measuring on the coax between
the balun and the tuner:  Yes, I assume the 1:1 balun has sufficient
common mode impedance to be preventing common mode current standing
waves on unbalanced side of it.   But I think what I'm measuring is
current that's being induced in the coax shield because it's lying in
the near field of radiation of the loop.  Again, what is a mystery to
me is how changing the grounding arrangement on the balun could affect
the magnitude of that.

I find this intruguing, but for the moment, I've put the clip on
ammeter away.  I'm going to forget it, while i digest this, and go
and play on 20m instead. 

Thanks for all the comments I've rec'd, on and off the list.

73

John

VK7JB

-Original Message-
 From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Richard Fjeld
 Sent: Friday, 21 September 2012 1:00 PM
 To: elecraft posting
 Subject: [Elecraft] Fw: Balun Ground Connection 

  

John, 

It is unfortunate that we can't see a schematic of how the balun is
wired.  

I have thought of doing that same thing to be able to use an ATU.  

Presently, I have an 80 meter loop fed with homebrew 450 ohm ladder
line to  

a tuner with a 1:1 balun within.  It works beautifully on all
bands.  I wish  

I had done it many years ago. 

  

As for your grounding the coax at both ends, I effectively do that
here also  

on my coax switch with coax to my K3 which is also grounded.  So
that is why  

it would be necessary to see the schematic to see what is different
about  

your situation. 

  

I can tell you that I have everything grounded to a 'ground tree', or
earth  

tree as our friends call it.  I buried a 6 ga. wire from the central
point  

over to my tower.  I grounded it at 2 or 3 places along the way, and
the  

tower is grounded at each leg with a separate ground rod.  When I
did make  

the final connection to the tower ground, I saw a change in the swr
of my  

beams which are at DC ground, and coax fed again similar to what you
are  

doing.  The swr got higher, but not bad.  Maybe it went up point
five or  

less.  From my experience, any time I change ANYTHING relating to my
antenna  

system, the SWR changes. 

  

As for #2, the common mode current, I thought a balun is supposed to
stop  

that from happening. 

  

Rich, n0ce 

 
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[Elecraft] Fw: Balun Ground Connection

[Richard Fjeld]

John,
It is unfortunate that we can't see a schematic of how the balun is wired. 
I have thought of doing that same thing to be able to use an ATU. 
Presently, I have an 80 meter loop fed with homebrew 450 ohm ladder line to 
a tuner with a 1:1 balun within.  It works beautifully on all bands.  I wish 
I had done it many years ago.

As for your grounding the coax at both ends, I effectively do that here also 
on my coax switch with coax to my K3 which is also grounded.  So that is why 
it would be necessary to see the schematic to see what is different about 
your situation.

I can tell you that I have everything grounded to a 'ground tree', or earth 
tree as our friends call it.  I buried a 6 ga. wire from the central point 
over to my tower.  I grounded it at 2 or 3 places along the way, and the 
tower is grounded at each leg with a separate ground rod.  When I did make 
the final connection to the tower ground, I saw a change in the swr of my 
beams which are at DC ground, and coax fed again similar to what you are 
doing.  The swr got higher, but not bad.  Maybe it went up point five or 
less.  From my experience, any time I change ANYTHING relating to my antenna 
system, the SWR changes.

As for #2, the common mode current, I thought a balun is supposed to stop 
that from happening.

Rich, n0ce

- Original Message - 
From: 
To: "'Jim Harris'" ; ; 
"'Elecraft Email'" 
Sent: Thursday, September 20, 2012 4:50 PM
Subject: Re: [Elecraft] Balun Ground Connection


> Hi Jim & group
>
> I did an experiment today and tied the balun case/coax shield to station 
> ground via the stud.
>
> I found 2 things:
>
> # 1 the manual tuner settings required for 1:1 match changed on all bands, 
> but the KAT3 and manual tuner were still able to find a 1:1.0 match on all 
> bands 80m - 10m.
>
> #2 where I had no detectable common mode current on the coax shield prior 
> to connecting the balun to ground, I now have 15-20mA on 20 and 40m, as 
> measured with my calibrated clip on ammeter.  There's also now some RF on 
> my tx audio, where before it was clean.
>
> I'm wondering if the coax shield between the balun and tuner IS 
> functioning as part of this loop antenna system and grounding its shield 
> before the tuner  is introducing more imbalance?
>
> I'm no expert, but this is interesting.
>
> 73,
> John
> VK7JB
>
>
>
>  Original Message --
>
>
>
> John,
> I found that by connecting the balun ground to my station ground I
> had >25 SWR on all bands. I just let it float..no problems so far.
>
> 73
> Jim, W0EM
> >>>
> John
> VK7JB
>
>
>
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Re: [Elecraft] [KX3] K2N "QRP CW DE-Xpedition" Results and Video

[stan levandowski]

Yes I do but it would be inappropriate for me to share them at this 
point.  We'll have to leave the privilege of unveiling the details of 
this little jewel to the developers.Stan WB2LQF


On Thu, Sep 20, 2012 at 10:30 PM, Thomas Campie wrote:

> Any close up pictures of the new key?
>
> 73, W0EA
> TJ
> 
> QRP ARCI #14612 | CW Ops #953 | SKCC #4593T
> NAQCC #3768 | Flying Pigs QRP #2254
> Elecraft KX3 SN 288
> Because QRO is too easy
>
> On Sep 20, 2012, at 9:25 PM, Charles Cupp  wrote:
>
>>
>>
>> Great Job Stan!!! U guys musts had a ball!!! Charly W6CUP
>>
>> Sent from my iPhone 4Gs 64Gig
>>
>> Pax Vobiscum
>>
>>
>> On Sep 20, 2012, at 19:21, "stan levandowski"  
>> wrote:
>>
>>> Our three KX3s performed flawlessly through eight hours of solid 
>>> pounding. We made 148 contacts and probably influenced the purchase 
>>> of at least a couple of KX3s in the process. The three KX3s were 
>>> operating within a few of feet of each other but we experienced no 
>>> interference issues we couldn't mitigate - except for fundamental 
>>> overload when we put two of them on parallel vertical antennas only 
>>> a few yards apart. Gosh...that's asking just a bit too much, even 
>>> from Elecraft!
>>>
>>> So Tony W1ZMB had to give up his 70 foot vertical for a 12 foot whip 
>>> antenna on the flying bridge that was fed with 200 feet of coax. The 
>>> KX3's ATU matched it 1:1 and whatever RF Tony had left by the time 
>>> it got to the whip found its way west to California, south to 
>>> Uruguay, and east to Europe.
>>>
>>> Ulrich N2DE made 67 contacts on his 80 foot wire vertical. Primarily 
>>> DX. Ulrich doesn't believe in wasting paper; he used his CW Machine 
>>> to autolog everything. I'll have to wait till he emails me an ADIF 
>>> file to see exactly where his signals landed.
>>>
>>> I spent the day on 40 meters at the end of a 100' long wire. The KX3 
>>> and its ATU were very happy with the antenna and the 1200 ton 
>>> counterpoise ;) My signal reports were mostly 559 to 599 with a 
>>> pipeline to the south, right off the end of the long wire. No DX for 
>>> me, except for Canada. Guess it was too early for 40M and we had to 
>>> QRT at 8:00 p.m. EDT.
>>>
>>> We all noted with great pleasure how many KX3s we worked today. We 
>>> also worked a number of K3s and K2s. We were hoping for at least one 
>>> K1 and a KX1 to make a clean sweep of the product line but (as far 
>>> as I know at this point) that didn't happen.
>>>
>>> My best "DX" was W4FKM in Bristol, TN. Claude had a homebrew 450 mw 
>>> rig on 40 meters into an inverted V. The APF function and a very 
>>> narrow bandwidth brought him out of the noise quite effectively.
>>>
>>> Condx were "OK" -not great but certainly not terrible. Wish we could 
>>> have gone longer.
>>>
>>> At the end of the day, we all agreed that the KX3 is a real winner. 
>>> It's moved the art and science of QRP ahead by a giant step.
>>>
>>> We accomplished our goals - We had a great deal of fun, got some 
>>> publicity for a historic ship, and called attention to QRP by 
>>> demonstrating that "it works."
>>>
>>> We probably could have made many more QSOs but only one (1) of us 
>>> (Ulrich) is of that caliber. Tony and I are just common ragchewers 
>>> and we admit to being sort of clumsy when it comes to keeping up 
>>> with the hand-logging while trying to field the next call.
>>>
>>> The Begali "Adventure" prototypes, both iambic and mono, were a joy 
>>> to use. We accumulated some additional input for Piero to consider 
>>> as he brings the paddle forward toward production. One of the guest 
>>> operators fell in love with both the KX3 and the Begali mono paddle. 
>>> He was left handed and easily accomodated by swiveling the paddle 
>>> from 45 degrees right to 45 degrees left and then retightening it. I 
>>> thought I'd never get my rig back!
>>>
>>> Here's a video in which you can catch a glimpse of the Begali 
>>> "Adventure" prototypes.
>>>
>>> http://www.youtube.com/watch?v=4b_cXOyiskU
>>>
>>> 73, Stan WB2LQF
>>>
>>
>>
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Re: [Elecraft] Balun Ground Connection

[Jim Harris]

John,
I'm not surprised at your findings in light of my experience.  Regarding the 
ATUs being able to tune in this case, I'm not surprised.  Elecraft tuners will 
match nearly a complete open and short...been there, done that.  I really 
wish they were limited to something like 6:1 to prevent that.  Above that SWR 
RF energy is grossly wasted, IMHO.
It seems for some reason that I don't know about at the moment, when the balun 
case ground is connected to station ground it somehow makes a major change in 
the antenna/coax system.  I've replaced most of the coax in all my antenna 
systems in the last month so I'm leaning toward some other explanation.  When I 
get some spare time this weekend I will try to take a further look at it.

73



Jim, W0EM

--- On Thu, 9/20/12, zen...@netspace.net.au  wrote:

From: zen...@netspace.net.au 
Subject: Re: Balun Ground Connection
To: "'Jim Harris'" , zen...@netspace.net.au, "'Elecraft 
Email'" 
Date: Thursday, September 20, 2012, 9:50 PM

Hi Jim & group

I did an experiment today and tied the balun case/coax shield to station ground 
via the stud. 

I found 2 things: 

# 1 the manual tuner settings required for 1:1 match changed on all bands, but 
the KAT3 and manual tuner were still able to find a 1:1.0 match on all bands 
80m - 10m. 

#2 where I had no detectable common mode current on the coax shield prior to 
connecting the balun to ground, I now have 15-20mA on 20 and 40m, as measured 
with my calibrated clip on ammeter.  There's also now some RF on my tx audio, 
where before it was clean. 

I'm wondering if the coax shield between the balun and tuner IS functioning as 
part of this loop antenna system and grounding its shield before the tuner  is 
introducing more imbalance?  

I'm no expert, but this is interesting. 

73,
John
VK7JB



 Original Message --

 

 John, 
 I found that by connecting the balun ground to my station ground I
had >25 SWR on all bands. I just let it float..no problems so far.

 73 
Jim, W0EM 
 >>>  
John
VK7JB



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[Elecraft] KX3 Intermittent changes in audio gain

[Kevin Luxford]

Hi Guys,
My KX3 has just developed an apparent fault - the audio level changes 
abruptly every few seconds from a comfortable listening level to quiet, 
but still audible.

I am using my Proset headphones.

Any thoughts on where I should start looking?  I am nervous about poking 
around surface mount circuits!

vy 73
Kevin
VK3DAP / ZL2DAP
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Re: [Elecraft] [KX3] K2N "QRP CW DE-Xpedition" Results and Video

[Thomas Campie]

Any close up pictures of the new key?

73, W0EA
TJ

QRP ARCI #14612 | CW Ops #953 | SKCC #4593T
NAQCC #3768 | Flying Pigs QRP #2254
Elecraft KX3 SN 288
Because QRO is too easy

On Sep 20, 2012, at 9:25 PM, Charles Cupp  wrote:

> 
> 
> Great Job Stan!!! U guys musts had a ball!!! Charly W6CUP
> 
> Sent from my 
> iPhone 4Gs 64Gig
> 
> Pax Vobiscum
> 
> 
> On Sep 20, 2012, at 19:21, "stan levandowski"  wrote:
> 
>> Our three KX3s performed flawlessly through eight hours of solid 
>> pounding. We made 148 contacts and probably influenced the purchase of 
>> at least a couple of KX3s in the process. The three KX3s were operating 
>> within a few of feet of each other but we experienced no interference 
>> issues we couldn't mitigate - except for fundamental overload when we 
>> put two of them on parallel vertical antennas only a few yards apart. 
>> Gosh...that's asking just a bit too much, even from Elecraft!
>> 
>> So Tony W1ZMB had to give up his 70 foot vertical for a 12 foot whip 
>> antenna on the flying bridge that was fed with 200 feet of coax. The 
>> KX3's ATU matched it 1:1 and whatever RF Tony had left by the time it 
>> got to the whip found its way west to California, south to Uruguay, and 
>> east to Europe.
>> 
>> Ulrich N2DE made 67 contacts on his 80 foot wire vertical. Primarily 
>> DX. Ulrich doesn't believe in wasting paper; he used his CW Machine to 
>> autolog everything. I'll have to wait till he emails me an ADIF file to 
>> see exactly where his signals landed.
>> 
>> I spent the day on 40 meters at the end of a 100' long wire. The KX3 
>> and its ATU were very happy with the antenna and the 1200 ton 
>> counterpoise ;) My signal reports were mostly 559 to 599 with a 
>> pipeline to the south, right off the end of the long wire. No DX for 
>> me, except for Canada. Guess it was too early for 40M and we had to QRT 
>> at 8:00 p.m. EDT.
>> 
>> We all noted with great pleasure how many KX3s we worked today. We also 
>> worked a number of K3s and K2s. We were hoping for at least one K1 and 
>> a KX1 to make a clean sweep of the product line but (as far as I know at 
>> this point) that didn't happen.
>> 
>> My best "DX" was W4FKM in Bristol, TN. Claude had a homebrew 450 mw rig 
>> on 40 meters into an inverted V. The APF function and a very narrow 
>> bandwidth brought him out of the noise quite effectively.
>> 
>> Condx were "OK" -not great but certainly not terrible. Wish we could 
>> have gone longer.
>> 
>> At the end of the day, we all agreed that the KX3 is a real winner. It's 
>> moved the art and science of QRP ahead by a giant step.
>> 
>> We accomplished our goals - We had a great deal of fun, got some 
>> publicity for a historic ship, and called attention to QRP by 
>> demonstrating that "it works."
>> 
>> We probably could have made many more QSOs but only one (1) of us 
>> (Ulrich) is of that caliber. Tony and I are just common ragchewers and 
>> we admit to being sort of clumsy when it comes to keeping up with the 
>> hand-logging while trying to field the next call.
>> 
>> The Begali "Adventure" prototypes, both iambic and mono, were a joy to 
>> use. We accumulated some additional input for Piero to consider as he 
>> brings the paddle forward toward production. One of the guest operators 
>> fell in love with both the KX3 and the Begali mono paddle. He was left 
>> handed and easily accomodated by swiveling the paddle from 45 degrees 
>> right to 45 degrees left and then retightening it. I thought I'd 
>> never get my rig back!
>> 
>> Here's a video in which you can catch a glimpse of the Begali 
>> "Adventure" prototypes.
>> 
>> http://www.youtube.com/watch?v=4b_cXOyiskU
>> 
>> 73, Stan WB2LQF
>> 
> 
> 
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[Elecraft] K2N "QRP CW DE-Xpedition" Results and Video

[stan levandowski]

Our three KX3s performed flawlessly through eight hours of solid 
pounding.  We made 148 contacts and probably influenced the purchase of 
at least a couple of KX3s in the process.  The three KX3s were operating 
within a few of feet of each other but we experienced no interference 
issues we couldn't mitigate - except for fundamental overload when we 
put two of them on parallel vertical antennas only a few yards apart. 
Gosh...that's asking just a bit too much, even from Elecraft!

So Tony W1ZMB had to give up his 70 foot vertical for a 12 foot whip 
antenna on the flying bridge that was fed with 200 feet of coax.  The 
KX3's ATU matched it 1:1 and whatever RF Tony had left by the time it 
got to the whip found its way west to California, south to Uruguay, and 
east to Europe.

Ulrich N2DE made 67 contacts on his 80 foot wire vertical.   Primarily 
DX.  Ulrich doesn't believe in wasting paper; he used his CW Machine to 
autolog everything.  I'll have to wait till he emails me an ADIF file to 
see exactly where his signals landed.

I spent the day on 40 meters at the end of a 100' long wire.  The KX3 
and its ATU were very happy with the antenna and the 1200 ton 
counterpoise ;)  My signal reports were mostly 559 to 599 with a 
pipeline to the south, right off the end of the long wire.  No DX for 
me, except for Canada.  Guess it was too early for 40M and we had to QRT 
at 8:00 p.m. EDT.

We all noted with great pleasure how many KX3s we worked today.  We also 
worked a number of K3s and K2s.  We were hoping for at least one K1 and 
a KX1 to make a clean sweep of the product line but (as far as I know at 
this point) that didn't happen.

My best "DX" was W4FKM in Bristol, TN.  Claude had a homebrew 450 mw rig 
on 40 meters into an inverted V. The APF function and a very narrow 
bandwidth brought him out of the noise quite effectively.

Condx were "OK" -not great but certainly not terrible.Wish we could 
have gone longer.

At the end of the day, we all agreed that the KX3 is a real winner. It's 
moved the art and science of QRP ahead by a giant step.

We accomplished our goals - We had a great deal of fun, got some 
publicity for a historic ship, and called attention to QRP by 
demonstrating that "it works."

We probably could have made many more QSOs but only one (1) of us 
(Ulrich) is of that caliber.  Tony and I are just common ragchewers and 
we admit to being sort of clumsy when it comes to keeping up with the 
hand-logging while trying to field the next call.

The Begali "Adventure" prototypes, both iambic and mono,  were a joy to 
use.  We accumulated some additional input for Piero to consider as he 
brings the paddle forward toward production.  One of the guest operators 
fell in love with both the KX3 and the Begali mono paddle.  He was left 
handed and easily accomodated by swiveling the paddle from 45 degrees 
right to 45 degrees left and then retightening it.I thought I'd 
never get my rig back!

Here's a video in which you can catch a glimpse of the Begali 
"Adventure" prototypes.

http://www.youtube.com/watch?v=4b_cXOyiskU


73, Stan WB2LQF
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Re: [Elecraft] KAT500 Remote Version

[ab2tc]

Hi,

That's not true. The L network's only solution is the lowest Q possible,
meaning it will have the lowest tuner loss possible and the widest
bandwidth. And if the capacitor and inductor steps are made small enough, a
1.0:1 solution is always possible. The fact that many tuners give up once
the SWR is below 2.0 or 1.5 is merely a shortcoming in their tuning
algorithms. I am having high hopes for the KAT500. Is anything known on how
many bits of L and C resolution is there?

AB2TC - Knut


Wes Stewart wrote
> What Don says is true as far as it goes.  The L-network tuner has only one
> solution, but it isn't necessarily a good one.
> 
> Way back in 1998 when correspondence was via typewriter and snail mail, I
> went around with Dean Straw, N6BV, then Editor of the ARRL Antenna Book,
> about tuner losses.  This was in conjunction with the editing of my paper,
> "Balanced Transmission Lines in Current Amateur Practice" that appeared in
> the Sixth Edition of the ARRL Antenna Compendium.
> 
> Remarkably (coincidence I'm sure ;) it wasn't long before favored authors
> were contributing articles to QST about how to measure tuner losses and
> TLW was written.
> 
> Tuner and line losses really do matter.
> 
> Wes  N7WS
> 
> 
> 





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Re: [Elecraft] K-Line Addition - DC Power Supply (Suggestion)

[Mike]

Seems to me Elecraft already has a great linear DC supply: It's built into the
KPA500.  Repackage it as a stand-alone, done.

73,

Mike, KW1ND
Knoxville, TN
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Re: [Elecraft] KX3 ATU

[Ignacy]

Time to finish kindergarten activities.

ATU in my KX3 has trouble tuning. I matched few bands and was loosing lock
during a QSO. Small changes in antenna length caused it to have large
changes in matching. I became very critical of ATU it especially that it all
took place during my trip to a few countries in EU.

Elecraft sent ATU replacement and now everything is fine. ATU in KX3 is now
a good deal.
Ignacy




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Re: [Elecraft] KX3 atu anomalies - or it is me.

[Wayne Burdick]

This is most likely a firmware bug, and now on my list (thanks).  
However, the difference between 1:1 and 1.3:1 is completely irrelevant  
on air. So the workaround for now is:  relax, and keep bugging me to  
fix it one in awhile :)

73,
Wayne
N6KR


On Sep 19, 2012, at 7:44 PM, Surfshot wrote:

> Thank you Steve, that doesn's make happy but at least I don't feel  
> like an alien.
>
> Luca
> W6LDM
>
> On Sep 19, 2012, at 7:38 PM, NU7B  wrote:
>
>> I can report that I see the same symptoms as Luca does, on my KX3  
>> #1690 with
>> latest FW V1.12 and KXAT3. When I use the "Tune" button on my  
>> antenna for,
>> say, 30 meters, I get a VSWR readout from the display of 1.3:1.  
>> Then I
>> engage the internal ATU to bring that to 1:1. At that point, if I  
>> put the TX
>> back in Tune mode to send a carrier - the display shows the same  
>> VSWR as it
>> did before the ATU was exercised.
>>
>> ATU mode is set to Auto. All measurements read from the KX3 display.
>>
>> Steve NU7B
>>
>>
>>
>> --
>> View this message in context: 
>> http://elecraft.365791.n2.nabble.com/KX3-atu-anomalies-or-it-is-me-tp7562944p7563005.html
>> Sent from the Elecraft mailing list archive at Nabble.com.
>> __
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Re: [Elecraft] KAT500 Remote Version

[David Cutter]

Indeed, the sole reason that I do not use my screwdriver vertical, it would 
wake the dead.

David
G3UNA


> Hi Wayne,
>
> An important consideration IMHO when designing a remote AMU (ATU), is the
> noise that it makes when tuning.  Neighbours, for some strange reason, 
> don't
> like to be awakend by the sound of relays nor tuning motors when they are
> sleeping :-)
>
> 73,
>
> Geoff
> LX2AO
>
>
> On September 20, 2012 at 8:50 PM, Wayne Burdick wrote:
>
>
>> It may be possible to remote the KAT500 with additional control
>> firmware and an appropriate weather-proof enclosure. We haven't done
>> any testing of this idea yet, but once we start shipping KAT500s,
>> we'll work with a few customers who want to experiment with this to
>> see what we can do to facilitate it.
>>
>> 73,
>> Wayne
>> N6KR
> 
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[Elecraft] FS: N8BX 73cnc.com VFO knobs

[W0FK]

Main tuning knob and VFO B machined weighted knobs for the K3. Black, in as
new condition. 

http://www.73cnc.com/product_p/k3comboblk.htm

$119 or best offer, shipped in the US. Please contact me off the list if
you're interested.

73, Lou, W0FK




-
St. Louis, MO
K3 #2513, P3 #620, KX3 #0036
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Re: [Elecraft] KAT500 Remote Version

[Geoffrey Mackenzie-Kennedy]

Hi Wayne,

An important consideration IMHO when designing a remote AMU (ATU), is the 
noise that it makes when tuning.  Neighbours, for some strange reason, don't 
like to be awakend by the sound of relays nor tuning motors when they are 
sleeping :-)

73,

Geoff
LX2AO


On September 20, 2012 at 8:50 PM, Wayne Burdick wrote:


> It may be possible to remote the KAT500 with additional control
> firmware and an appropriate weather-proof enclosure. We haven't done
> any testing of this idea yet, but once we start shipping KAT500s,
> we'll work with a few customers who want to experiment with this to
> see what we can do to facilitate it.
>
> 73,
> Wayne
> N6KR

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Re: [Elecraft] KAT500 Remote Version

[Wes Stewart]

What Don says is true as far as it goes.  The L-network tuner has only one 
solution, but it isn't necessarily a good one.

Way back in 1998 when correspondence was via typewriter and snail mail, I went 
around with Dean Straw, N6BV, then Editor of the ARRL Antenna Book, about tuner 
losses.  This was in conjunction with the editing of my paper, "Balanced 
Transmission Lines in Current Amateur Practice" that appeared in the Sixth 
Edition of the ARRL Antenna Compendium.

Remarkably (coincidence I'm sure ;) it wasn't long before favored authors were 
contributing articles to QST about how to measure tuner losses and TLW was 
written.

Tuner and line losses really do matter.

Wes  N7WS



--- On Thu, 9/20/12, Don Wilhelm  wrote:


David,

Those who have mentioned "tuner loss" may or may not be correct - it all 
depends on the tuner.  If the tuner is of the "T match" variety, it will 
have multiple points where it can show a match, but many of those 
"matched" points will result in high circulating currents in the tuner 
and high losses.

Elecraft tuners are "L-match" tuners, and do not suffer from those false 
tuning points - it will either match the load or it will fail.

You LMR600 coax is very low loss and at frequencies below 30 MHz. I 
would offer that a 100 foot run could have an SWR as high as 5:1 and the 
loss would be acceptable.  If your coax run is longer than that, or your 
SWR is higher, then, yes, I would feel more comfortable with a remote 
antenna tuner to keep the SWR on the coax down to a reasonable level.

73,
Don W3FPR

On 9/20/2012 3:59 PM, David Bunte wrote:
> I have been trying to decide between the KAT500... and a remote tuner at
> the base of my 30' vertical.  I have measured the SWR on each band, at the
> shack end of my 125' of LMR600.  If I take that length, frequency and SWR
> information and plug it into the chart for SWR loss of LMR600, I can see
> what my loss is on each band... but I am not sure that tells the entire
> story.
>
> Intuitively it seems that I want the ATU as close to the antenna as
> possible.  I could shorten my feedline to about 65'.  I could mount an ATU
> just inside my basement at about 30' from the antenna (and avoid a
> weatherproof box - as long as the ATU does not need to be seen or touched),
> or I could mount it at the base of the antenna, but that would be very much
> more challenging.
>
> Is the SWR loss, based on my cable type, length & frequency all I need
> consider, or am I missing something?
>
> Some people have told me that I need consider nothing else... others have
> said that "tuner loss" is critical, and that will be greater than the line
> loss.  That sounds bogus to me, but I really don't know.
>
> I also know that the ATU in my K3 can make the rig very happy on 80 through
> 6 with this antenna and 125' of cable... but I don't know if matching the
> antenna at the end of 1', 30' or 65' will be harder, or easier.
>
> It was suggested that the TLW program by N6BV, that is packaged with the
> ARRL Antenna Book would help, but I have not been able to figure out how to
> use it, and can find no instructions for that program.
>
> Any and all help will be appreciated.
>
> Dave - K9FN
>
>
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Re: [Elecraft] Balun Ground Connection

[zendoc]

Hi Jim & group

I did an experiment today and tied the balun case/coax shield to station ground 
via the stud. 

I found 2 things: 

# 1 the manual tuner settings required for 1:1 match changed on all bands, but 
the KAT3 and manual tuner were still able to find a 1:1.0 match on all bands 
80m - 10m. 

#2 where I had no detectable common mode current on the coax shield prior to 
connecting the balun to ground, I now have 15-20mA on 20 and 40m, as measured 
with my calibrated clip on ammeter.  There's also now some RF on my tx audio, 
where before it was clean. 

I'm wondering if the coax shield between the balun and tuner IS functioning as 
part of this loop antenna system and grounding its shield before the tuner  is 
introducing more imbalance?  

I'm no expert, but this is interesting. 

73,
John
VK7JB



 Original Message --

 

 John, 
 I found that by connecting the balun ground to my station ground I
had >25 SWR on all bands. I just let it float..no problems so far.

 73 
Jim, W0EM 
 >>>  
John
VK7JB



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Re: [Elecraft] KAT500 Remote Version

[ab2tc]

Hi,

I am one of those customers interested in outdoors, remote location of the
KAT500. I have a suspicion that I may be too late in the ordering queue (a
day and a half or so after orders opened) that I may not be able do much
experimentation before winter weather sets in, but one can always hope. One
of the challenges will be to communicate with it over a distance of about
100' and I expect I have to use an Ethernet serial server that I already
possess.

AB2TC - Knut


Bruce Hammond wrote
> Thanks Wayne! I look forward to seeing what comes out of it.
> 
> 73 de KK7EL Bruce
> 
> 
> On 09/20/2012 12:12, wayne burdick [via Elecraft] wrote:
>> It may be possible to remote the KAT500 with additional control
>> firmware and an appropriate weather-proof enclosure. We haven't done
>> any testing of this idea yet, but once we start shipping KAT500s,
>> we'll work with a few customers who want to experiment with this to
>> see what we can do to facilitate it.
>>
>> 73,
>> Wayne
>> N6KR
> 





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Re: [Elecraft] KAT500 Remote Version

[Brian Alsop]

David,

It's worth trying to figure out TLW.
Steps are basically this for coax loss:
1) Select coax type
2) Input length
3) Input frequency.

The fun begins when one looks at the loss of the coax for various loads.
Input 50 ohms first.  That will give you the coax loss when matched. 
Then input other values and you will see total loss including the mismatch.

Here are some examples using 125' of LMR600
20M  matched .33 db
20M 10 ohms  .805 db
20M 250 ohms .8 db
20M 500 ohms 1.43 db

10M matched  .506 db
10M 10 ohms  1.19 db
10M 250 ohm  1.15 db
10M 500 ohms 2.0 db

I wouldn't want to put a hacksaw to that beautiful (and expensive) coax 
to "improve things". Fittings aren't cheap either. Cutting it in half 
would pick up a max of 1 db in the above cases.  In most cases it is 
less than 0.5 db.  1db is the minimum discernible signal level change a 
human can detect.

TLW can do a lot more than the above.

73 de Brian/K3KO

On 9/20/2012 19:59, David Bunte wrote:
> I have been trying to decide between the KAT500... and a remote tuner at
> the base of my 30' vertical.  I have measured the SWR on each band, at the
> shack end of my 125' of LMR600.  If I take that length, frequency and SWR
> information and plug it into the chart for SWR loss of LMR600, I can see
> what my loss is on each band... but I am not sure that tells the entire
> story.
>
> Intuitively it seems that I want the ATU as close to the antenna as
> possible.  I could shorten my feedline to about 65'.  I could mount an ATU
> just inside my basement at about 30' from the antenna (and avoid a
> weatherproof box - as long as the ATU does not need to be seen or touched),
> or I could mount it at the base of the antenna, but that would be very much
> more challenging.
>
> Is the SWR loss, based on my cable type, length&  frequency all I need
> consider, or am I missing something?
>
> Some people have told me that I need consider nothing else... others have
> said that "tuner loss" is critical, and that will be greater than the line
> loss.  That sounds bogus to me, but I really don't know.
>
> I also know that the ATU in my K3 can make the rig very happy on 80 through
> 6 with this antenna and 125' of cable... but I don't know if matching the
> antenna at the end of 1', 30' or 65' will be harder, or easier.
>
> It was suggested that the TLW program by N6BV, that is packaged with the
> ARRL Antenna Book would help, but I have not been able to figure out how to
> use it, and can find no instructions for that program.
>
> Any and all help will be appreciated.
>
> Dave - K9FN
>
>
>
>
>
> On Thu, Sep 20, 2012 at 2:50 PM, Wayne Burdick  wrote:
>
>> It may be possible to remote the KAT500 with additional control
>> firmware and an appropriate weather-proof enclosure. We haven't done
>> any testing of this idea yet, but once we start shipping KAT500s,
>> we'll work with a few customers who want to experiment with this to
>> see what we can do to facilitate it.
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
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>
> -
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2221 / Virus Database: 2441/5281 - Release Date: 09/20/12
>
>



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Re: [Elecraft] KAT500 Remote Version

[Don Wilhelm]

David,

Those who have mentioned "tuner loss" may or may not be correct - it all 
depends on the tuner.  If the tuner is of the "T match" variety, it will 
have multiple points where it can show a match, but many of those 
"matched" points will result in high circulating currents in the tuner 
and high losses.

Elecraft tuners are "L-match" tuners, and do not suffer from those false 
tuning points - it will either match the load or it will fail.

You LMR600 coax is very low loss and at frequencies below 30 MHz. I 
would offer that a 100 foot run could have an SWR as high as 5:1 and the 
loss would be acceptable.  If your coax run is longer than that, or your 
SWR is higher, then, yes, I would feel more comfortable with a remote 
antenna tuner to keep the SWR on the coax down to a reasonable level.

73,
Don W3FPR

On 9/20/2012 3:59 PM, David Bunte wrote:
> I have been trying to decide between the KAT500... and a remote tuner at
> the base of my 30' vertical.  I have measured the SWR on each band, at the
> shack end of my 125' of LMR600.  If I take that length, frequency and SWR
> information and plug it into the chart for SWR loss of LMR600, I can see
> what my loss is on each band... but I am not sure that tells the entire
> story.
>
> Intuitively it seems that I want the ATU as close to the antenna as
> possible.  I could shorten my feedline to about 65'.  I could mount an ATU
> just inside my basement at about 30' from the antenna (and avoid a
> weatherproof box - as long as the ATU does not need to be seen or touched),
> or I could mount it at the base of the antenna, but that would be very much
> more challenging.
>
> Is the SWR loss, based on my cable type, length & frequency all I need
> consider, or am I missing something?
>
> Some people have told me that I need consider nothing else... others have
> said that "tuner loss" is critical, and that will be greater than the line
> loss.  That sounds bogus to me, but I really don't know.
>
> I also know that the ATU in my K3 can make the rig very happy on 80 through
> 6 with this antenna and 125' of cable... but I don't know if matching the
> antenna at the end of 1', 30' or 65' will be harder, or easier.
>
> It was suggested that the TLW program by N6BV, that is packaged with the
> ARRL Antenna Book would help, but I have not been able to figure out how to
> use it, and can find no instructions for that program.
>
> Any and all help will be appreciated.
>
> Dave - K9FN
>
>
>
>
>
> On Thu, Sep 20, 2012 at 2:50 PM, Wayne Burdick  wrote:
>
>> It may be possible to remote the KAT500 with additional control
>> firmware and an appropriate weather-proof enclosure. We haven't done
>> any testing of this idea yet, but once we start shipping KAT500s,
>> we'll work with a few customers who want to experiment with this to
>> see what we can do to facilitate it.
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
>> __
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>>
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Re: [Elecraft] KAT500 Remote Version

[Dick Dievendorff]

This web page may be of help to understand TLW:
http://www.antennex.com/shack/Dec04/tlnw.htm

73 de Dick, K6KR


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Bunte
Sent: Thursday, September 20, 2012 12:59 PM
To: Wayne Burdick
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Remote Version

I have been trying to decide between the KAT500... and a remote tuner at the
base of my 30' vertical.  I have measured the SWR on each band, at the shack
end of my 125' of LMR600.  If I take that length, frequency and SWR
information and plug it into the chart for SWR loss of LMR600, I can see
what my loss is on each band... but I am not sure that tells the entire
story.

Intuitively it seems that I want the ATU as close to the antenna as
possible.  I could shorten my feedline to about 65'.  I could mount an ATU
just inside my basement at about 30' from the antenna (and avoid a
weatherproof box - as long as the ATU does not need to be seen or touched),
or I could mount it at the base of the antenna, but that would be very much
more challenging.

Is the SWR loss, based on my cable type, length & frequency all I need
consider, or am I missing something?

Some people have told me that I need consider nothing else... others have
said that "tuner loss" is critical, and that will be greater than the line
loss.  That sounds bogus to me, but I really don't know.

I also know that the ATU in my K3 can make the rig very happy on 80 through
6 with this antenna and 125' of cable... but I don't know if matching the
antenna at the end of 1', 30' or 65' will be harder, or easier.

It was suggested that the TLW program by N6BV, that is packaged with the
ARRL Antenna Book would help, but I have not been able to figure out how to
use it, and can find no instructions for that program.

Any and all help will be appreciated.

Dave - K9FN





On Thu, Sep 20, 2012 at 2:50 PM, Wayne Burdick  wrote:

> It may be possible to remote the KAT500 with additional control 
> firmware and an appropriate weather-proof enclosure. We haven't done 
> any testing of this idea yet, but once we start shipping KAT500s, 
> we'll work with a few customers who want to experiment with this to 
> see what we can do to facilitate it.
>
> 73,
> Wayne
> N6KR
>
>
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Re: [Elecraft] Balun Ground Connection

[Don Wilhelm]

Jim.

I would strongly suggest that is an indication of a problem in your 
antenna system somewhere (my first guess would be between the 
transmitter and the balun).  I would start by substituting the coax to 
the balun.

73,
Don W3FPR

On 9/20/2012 3:53 PM, Jim Harris wrote:
> John,
> I found that by connecting the balun ground to my station ground I had >25 
> SWR on all bands.  I just let it float..no problems so far.
> 73
> Jim, W0EM
>

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Re: [Elecraft] Balun Ground Connection

[Jim Brown]

On 9/20/2012 12:53 PM, Jim Harris wrote:
> I found that by connecting the balun ground to my station ground I had >25 
> SWR on all bands.  I just let it float..no problems so far.

That suggests something wrong with your antenna system.

73, Jim K9YC
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Re: [Elecraft] KAT500 Remote Version

[David Bunte]

I have been trying to decide between the KAT500... and a remote tuner at
the base of my 30' vertical.  I have measured the SWR on each band, at the
shack end of my 125' of LMR600.  If I take that length, frequency and SWR
information and plug it into the chart for SWR loss of LMR600, I can see
what my loss is on each band... but I am not sure that tells the entire
story.

Intuitively it seems that I want the ATU as close to the antenna as
possible.  I could shorten my feedline to about 65'.  I could mount an ATU
just inside my basement at about 30' from the antenna (and avoid a
weatherproof box - as long as the ATU does not need to be seen or touched),
or I could mount it at the base of the antenna, but that would be very much
more challenging.

Is the SWR loss, based on my cable type, length & frequency all I need
consider, or am I missing something?

Some people have told me that I need consider nothing else... others have
said that "tuner loss" is critical, and that will be greater than the line
loss.  That sounds bogus to me, but I really don't know.

I also know that the ATU in my K3 can make the rig very happy on 80 through
6 with this antenna and 125' of cable... but I don't know if matching the
antenna at the end of 1', 30' or 65' will be harder, or easier.

It was suggested that the TLW program by N6BV, that is packaged with the
ARRL Antenna Book would help, but I have not been able to figure out how to
use it, and can find no instructions for that program.

Any and all help will be appreciated.

Dave - K9FN





On Thu, Sep 20, 2012 at 2:50 PM, Wayne Burdick  wrote:

> It may be possible to remote the KAT500 with additional control
> firmware and an appropriate weather-proof enclosure. We haven't done
> any testing of this idea yet, but once we start shipping KAT500s,
> we'll work with a few customers who want to experiment with this to
> see what we can do to facilitate it.
>
> 73,
> Wayne
> N6KR
>
>
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[Elecraft] Balun Ground Connection

[Jim Harris]

John,
I found that by connecting the balun ground to my station ground I had >25 SWR 
on all bands.  I just let it float..no problems so far.
73
Jim, W0EM 
< Should I connect the balun, via the case stud, directly to station
ground??>>> 
John
VK7JB


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Re: [Elecraft] KAT500 Remote Version

[Bruce Hammond]

Thanks Wayne! I look forward to seeing what comes out of it.

73 de KK7EL Bruce


On 09/20/2012 12:12, wayne burdick [via Elecraft] wrote:
> It may be possible to remote the KAT500 with additional control
> firmware and an appropriate weather-proof enclosure. We haven't done
> any testing of this idea yet, but once we start shipping KAT500s,
> we'll work with a few customers who want to experiment with this to
> see what we can do to facilitate it.
>
> 73,
> Wayne
> N6KR
>
>
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>
> 
> If you reply to this email, your message will be added to the 
> discussion below:
> http://elecraft.365791.n2.nabble.com/KAT500-Remote-Version-tp7563017p7563026.html
>  
>
> To unsubscribe from KAT500 Remote Version, click here 
> .
> NAML 
> 
>  
>





-
73 de KK7EL Bruce
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Re: [Elecraft] KAT500 Remote Version

[Wayne Burdick]

It may be possible to remote the KAT500 with additional control  
firmware and an appropriate weather-proof enclosure. We haven't done  
any testing of this idea yet, but once we start shipping KAT500s,  
we'll work with a few customers who want to experiment with this to  
see what we can do to facilitate it.

73,
Wayne
N6KR


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Re: [Elecraft] KAT500 Remote Version

[Doug Faunt]

I will note that at least one thing stated below is no longer the case- 
the size.
And the different form factor may make a remote model more difficult.
But I'm hoping that will not be a problem.

73, doug



>>In case anyone was wondering: We are definitely planning to ship a 
>> new
>>high-power autotuner next year. It will be an ideal companion tuner
>>for the KPA500 and other amplifiers in the 500-600 W class (full
>>rating on 160-6 m). It will be offered in both a desktop model (P3
>>size) and a remote model for use at the antenna. Both will feature
>>latching relays to minimize operating current. It will support 
>> various
>>industry-standard control protocols.

>>73,
>>Wayne & Eric


On 09/20/12 10:52, Bruce Hammond wrote:
> Guy, it was announced June 16, 2010 by Wayne, see link below:
> 
> http://elecraft.365791.n2.nabble.com/Elecraft-KAT500-was-quot-Auto-Tuner-quot-td5188575.html
>
> I sure hope they do it and soon.
>
>
>
> -
> 73 de KK7EL Bruce
> --
> View this message in context:
> 
> http://elecraft.365791.n2.nabble.com/KAT500-Remote-Version-tp7563017p7563022.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] KAT2 high SWR problem..?

[Mike K8CN]

Gil,

When you say you completed your KAT2 build, did you complete all of the
final calibration steps, specifically the bridge null adjustment (p. 16 of
the KAT2 manual) and the power calibration adjustment (p. 17)?  I would be
surprised if you could make those adjustments successfully and yet have the
low output power you indicated into a good 50 ohm dummy load - a problem
with T1 connections would be revealed during one or both of those
adjustments if that were the source of difficulty.  Be sure that you also
have selected on the K2 front panel the correct antenna port (Ant 1/2)  to
which your dummy load is attached.

73,
Mike, K8CN



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Re: [Elecraft] KX3 atu anomalies - or it is me.

“...I use an LDG tuner at a remote location from my rig. I see something 
similar to what is being discussed at times. Sometimes it will stop tuning 
(perhaps quickly) when it gets a match slightly below 2:1. Other times I get a 
much better match...”

Don’t forget that unless your transmission system out to the remote tuner is 
perfect, you will see a composite SWR that could be better or worse than the 
remote tuned SWR (and Murphy says it will be worse!).  To determine the SWR 
range you can see, terminate your transmission system at the remote tuner input 
with a good load and record the SWR.  Lets call this SWRa.  Most autotuners 
stop tuning when the SWR is at or below below 1.5:1.  So now, depending on the 
relative phases of the mismatched systems, your SWR range measured in the shack 
can be:

Max SWR = SWRa X 1.5
Min SWR = SWRa/1.5 or 1.5/SWRa (whichever gives you the larger numerator).

So as an example, let’s say your terminated transmission system has an SWR of 
1.3:1 on a given frequency.  This could easily be the case (or worse) assuming 
you have switches, jumper cables, etc in-line.   Then if you assume the 
autotuner tunes to an SWR of 1.5:1, the maximum SWR you could see in the shack 
could be 1.95:1, and the minimum SWR you could see would be 1.15:1.

So when you do a remote re-tune, the phase of the reflected signal as well as 
the tuned SWR could both be different resulting in very different in-shack SWR 
readings.  So you really can’t always blame the remote tuner for not seeing a 
good in-shack SWR unless your transmission system is very good.

Phil – AD5X

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Re: [Elecraft] KAT500 Remote Version

[Bruce Hammond]

Guy, it was announced June 16, 2010 by Wayne, see link below:
http://elecraft.365791.n2.nabble.com/Elecraft-KAT500-was-quot-Auto-Tuner-quot-td5188575.html

I sure hope they do it and soon.  



-
73 de KK7EL Bruce
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Re: [Elecraft] KAT500 Remote Version

[Guy Olinger K2AV]

Did they actually say they were going to do a remote version?  That's
not trivial like put it in a sealed box and you're done.  People have
asked about it, but I don't recall them saying it was on the list.
73, Guy.

On Thu, Sep 20, 2012 at 12:21 PM, Bruce Hammond  wrote:
> I see the KAT500 (indoor) version is set to ship Oct 1-15 timeframe. Tech
> info and shipping target date for remote version of KAT500 would be
> appreciated.
>
>
>
> -
> 73 de KK7EL Bruce
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/KAT500-Remote-Version-tp7563017.html
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Re: [Elecraft] Ground connection on a DX Engineering balun - what's best with my loop?

[Vic K2VCO]

The stud and the coax shield are connected together. So grounding the stud 
outside is just 
another ground path for the station ground.

The warning about the "antenna ground" means that two halves of an antenna 
should be 
connected to the two insulated connectors and not to the station ground. If you 
were to 
connect one of the insulated connectors to the stud, it would bypass the 
isolation 
provided by the balun, defeating its purpose.

On 9/20/2012 6:47 AM, zen...@netspace.net.au wrote:
>
>
>   Hello Group,
>
> Apologies if this is too far off topic, but I have a question about
> ground connection on a DX Engineering balun.
>
> I have an 80m horizontal loop, fed with 300 ohm ladder line.  I use
> this multiband.  The ladderline ends just outside the shack at a DX
> Engineering 1:1 current balun, which has an aluminium case.  A 6 foot
> length of RG213 then leaves the balun and passes through the shack
> wall to the coax connector on the back of an unbalanced Palstar manual
> tuner.  The tuner chassis is connected to station ground (bonded to
> AC safety ground) via a direct wire, through the wall to a ground rod
> less than 3 feet away.
>
> On the balun case, there is a stud and wingnut to allow the
> unbalanced  side of the balun (coax shield)  to be connected to
> station ground.
>
> A warning in the DXE balun manual states that the ground stud on its
> case should not be connected to "antenna ground".  In my situation,
> I'm not sure whether the coax on the shield between the balun and
> tuner is considered to be part of the "antenna ground" and should
> therefore  NOT be connected to station ground?
>
> So my question is:
>
> Should I connect the balun, via the case stud, directly to station
> ground?  (The ground rod is only 2 feet below the balun, right
> outside the shack.)
>
> Or do I leave my current configuration, where station ground is
> connected to the tuner chassis.
>
> Thanks for any advice.
>
> 73
> John
> VK7JB
>
>
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-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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Re: [Elecraft] KX3 atu anomalies - or it is me.

[Terry Schieler]

I have experienced exactly what Mike has described below.  I found that auto 
tuners in my old Kenwood TS850-S/AT, my LDG, my K3 and others seem to get to a 
"reasonable" match then stop.  In most every case a second press of the tuner 
button would, in just a few milliseconds, give a totally flat reading.  My 
SGC-230 reacts the same way.  If you are insistent on a flat SWR reading, try a 
second "press".  

73,

Terry, WØFM


-Original Message-
From: Mike WA8BXN [mailto:hubb...@hotmail.com] 
Sent: Wednesday, September 19, 2012 10:21 PM
To: elecraft@mailman.qth.net; NU7B
Subject: Re: [Elecraft] KX3 atu anomalies - or it is me.

I use an LDG tuner at a remote location from my rig. I see something similar to 
what is being discussed at times. Sometimes it will stop tuning (perhaps
quickly) when it gets a match slightly below 2:1. Other times I get a much 
better match. The reason I assume is the algorithm used in the tuner. An SWR 
ratio of 2:1 is not bad at all. The difference between 1.3 and 1:1 really is 
not worth talking about. Part of the situation is an optimization in the tuner 
algorithm. Some tuner programmers assume you would prefer a quick tune to 
something below 2:1 rather than waiting a few seconds more for what may or may 
not be a better match. 

73 - Mike WA8BXN

 
 
 

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[Elecraft] [KX3] OFS/VFO B Knob Muting in Text Decode

[William Ravenel]

I searched the archives and could not find reference to the following issue 
I've observed on my KX3:

I don't normally use the text decode feature but was playing with it today and 
noticed that rotating the OFS/VFO B knob after setting TEXT DECODE resulted in 
strong muting of the receiver. The muting appears to be related to the knob 
rotation rather than the specific setting selected. I first noticed it when 
changing from TX ONLY to RX THR1 but experimentation revealed that even turning 
the knob counterclockwise while displaying DEC OFF would mute the receiver. It 
sometimes took rotation through two settings such as from TX ONLY to RX THR2, 
or counterclockwise through two "clicks" while on DEC OFF to mute. Once muted 
the receiver remained muted as the knob was rotated and could only be corrected 
by unsetting and re-setting TEXT DECODE or tapping ATU TUN. The muting occurs 
even when the ATU is bypassed or when NOT INST is selected. This requires 
cycling power to recover normal receive levels. The muting is severe, with the 
resulting audio level between the normal ATT 20db redu
 ction and disconnecting the antenna. Setting ATT while muted has no effect on 
audio level. I hear a popping noise in the audio with every selection of the 
OFS/VFO B knob when in TEXT DECODE mode only (no noise when rotating through 
menu selections or any other mode that I have used).

Has anyone else experienced this? Can anyone give me a suggestion as to what 
might be the problem?

Thanks,

William, AI4VE



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[Elecraft] KAT500 Remote Version

[Bruce Hammond]

I see the KAT500 (indoor) version is set to ship Oct 1-15 timeframe. Tech
info and shipping target date for remote version of KAT500 would be
appreciated.



-
73 de KK7EL Bruce
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[Elecraft] K3 v IC7600

[Johnny Siu]

Hello Tim,
 
I am not sure the answer but I am sure you will lose the manual notch within 
AGC loop in the IC7600.
 
If there is a strong carrier right next to your weak SSB signal, a manual notch 
within AGC will notch out the carrier and bring up the weak SSB signal.  In 
other words, the de-sense in AGC by the strong carrier will then be much 
reduced in IC7600.
 
Of course, you can also solve this problem by turning AGC off.  However, Icom's 
manual notch within AGC is particularly good in this specific application.

TNX & 73,


Johnny VR2XMC



 寄件人︰ Tim Hague 
收件人︰ "elecraft@mailman.qth.net"  
傳送日期︰ 2012年09月20日 (週四) 9:59 PM
主題︰ [Elecraft] K3 v IC7600
  
Hi. I've recently acquired a KX3 and have noticed that in my very noisy 
location the KX3 has the ability to hear signals that the IC7600 just can't, 
specifically on 80M where plasma TV interference rules supreme.

I'm not using the noise blanker on either rig by the way.

My question is would I see a similar improvement if I was to sell the IC7600 
and replace it with the K3, 

Best regards, Tim Hague
Sent on my iPad
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Re: [Elecraft] Ground connection on a DX Engineering balun - what's best with my loop?

[Don Wilhelm]

John,

I would interpret "antenna ground" to be something in the antenna 
system, such as a radial system.
Yes, connect the grounding stud to your ground rod outside the house.

73,
Don W3FPR

On 9/20/2012 9:47 AM, zen...@netspace.net.au wrote:
> On the balun case, there is a stud and wingnut to allow the
> unbalanced  side of the balun (coax shield)  to be connected to
> station ground.
>
> A warning in the DXE balun manual states that the ground stud on its
> case should not be connected to "antenna ground".  In my situation,
> I'm not sure whether the coax on the shield between the balun and
> tuner is considered to be part of the "antenna ground" and should
> therefore  NOT be connected to station ground?
>
> So my question is:
>
> Should I connect the balun, via the case stud, directly to station
> ground?  (The ground rod is only 2 feet below the balun, right
> outside the shack.)
>
>

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[Elecraft] K3 v IC7600

[Tim Hague]

Hi. I've recently acquired a KX3 and have noticed that in my very noisy 
location the KX3 has the ability to hear signals that the IC7600 just can't, 
specifically on 80M where plasma TV interference rules supreme.

I'm not using the noise blanker on either rig by the way.

My question is would I see a similar improvement if I was to sell the IC7600 
and replace it with the K3, 

Best regards, Tim Hague
Sent on my iPad

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[Elecraft] Ground connection on a DX Engineering balun - what's best with my loop?

[zendoc]

Hello Group,

Apologies if this is too far off topic, but I have a question about
ground connection on a DX Engineering balun. 

I have an 80m horizontal loop, fed with 300 ohm ladder line.  I use
this multiband.  The ladderline ends just outside the shack at a DX
Engineering 1:1 current balun, which has an aluminium case.  A 6 foot
length of RG213 then leaves the balun and passes through the shack
wall to the coax connector on the back of an unbalanced Palstar manual
tuner.  The tuner chassis is connected to station ground (bonded to
AC safety ground) via a direct wire, through the wall to a ground rod
less than 3 feet away.

On the balun case, there is a stud and wingnut to allow the
unbalanced  side of the balun (coax shield)  to be connected to
station ground.

A warning in the DXE balun manual states that the ground stud on its
case should not be connected to "antenna ground".  In my situation,
I'm not sure whether the coax on the shield between the balun and
tuner is considered to be part of the "antenna ground" and should
therefore  NOT be connected to station ground?

So my question is:

Should I connect the balun, via the case stud, directly to station
ground?  (The ground rod is only 2 feet below the balun, right
outside the shack.)

Or do I leave my current configuration, where station ground is
connected to the tuner chassis.

Thanks for any advice.

73
John
VK7JB


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[Elecraft] New software

[Paul VanOveren]

For those hams that are also sailors, there is a new software for Android, 
phones, tablets, from Wolphi.com., called Droid Navtex.  Wolfgang, W8DA has 
previously published Droid PSK, Droid RTTY, Morse Decoder, Morse trainer, etc 
and now added the Navtex software. I have no financial interest in his apps, 
just a friend.

NF8J
Paul
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Re: [Elecraft] KX3 DVR

[Dominic Baines]

Any update on the S/W upgrade?

I am about to need this functionality again.

72

Dom
M1KTA



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