[Elecraft] Windows 10 update, addendum / SetupDiag.

[Pete Barth]

-
A few weeks ago, I mentioned after I did a windows 10 update, I was left
without any audio, in or out.
Researching, I found a fix (which I posted).

Now, here is another flash.
There is another Microsoft posting / Fix that is useful.
It is:
How to Fix Your Windows 10 Update Errors With SetupDiag.
https://www.makeuseof.com/tag/fix-windows-10-update-errors-setupdiag/
---
I hope this helps some Elecraft people.

Pete / พีท / W6LAW
323 460-7018Hollywood home
323 461-7018Pete cell
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Re: [Elecraft] K4: superhet vs. direct sampling

[Clay Autery]

Was thinking the very same thing  but I am not so sure I will be 
able to let my K3S go...  I may just be adding...  And then I can make 
the K3S a traveling system.


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(318) 518-1389

On 04-Jun-19 21:50, Bill Johnson wrote:

Wayne, all these options and modernizations, even though I love my K3S and really don't 
need to upgrade, I will be "forced" to break down and buy one.

72 & 73,
Bill
K9YEQ
FT'er for K2, KX1, KX3, KXPA100,  KAT500, W2, etc.

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Wayne Burdick
Sent: Tuesday, June 4, 2019 9:19 PM
To: Elecraft Reflector 
Subject: [Elecraft] K4: superhet vs. direct sampling

The superhet module buys a lot of BDR improvement. But also -- a subtlety I've 
failed to mention so far -- the superhet module is intended to somewhat improve 
2 kHz IMDDR3 *and* make this figure more repeatable.

Q: Say what?

A: As Rob Sherwood noted many times before finally immortalizing this point in 
his must-read footnotes, A-to-D converters sharing the same part number are not 
all created equal. The long-time previous occupant of his Top Spot benefitted 
from a never-corroborated monotonicity in its ADC's LSBs. An act of god. The 
product of a very good day at the silicon foundry when, serendipitously, all 
the bunny suits were defect-free, and no one was exhaling molecules of grain 
alcohol or other substances from the night before.

That said, most ops can get by without the extra BDR and IMDDR3, because 
they're not situated in the RF equivalent of the Gulf Stream. Hence the 
different K4 models.

73,
Wayne
N6KR



On Jun 4, 2019, at 5:10 PM, Lyle Johnson  wrote:

Mark,

The "20 dB lower than a K3" figure is an estimate for 100 kHz Blocking Dynamic 
Range rather than the 2 kHz Narrow Spaced Dynamic Range.

The K3 is listed at 140 to 150 dB (depending on model, synthesizer, etc) on Sherwood's 
Receiver Test Data page.  The K4 series without the "HD" option are estimated 
to be in the 120 to 130 dB range, typical of other direct sampling SDR products (Flex, 
Apache, Icom, ...).

73,

Lyle KK7P

On 6/4/19 4:00 PM, mark roz via Elecraft wrote:

Before putting my money up front for the first run of K4D I need to
know what is the dynamic range of the K4D RX at 2kHz spacing. K3 is 105 dB and 
K4D? If it is 20dB lower than K3 than it would be 85dB-correct?



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Re: [Elecraft] K4 Production Prognosis

[Eric Swartz - WA6HHQ, Elecraft]

And with that note - let's end this thread in the interest of maintaining a 
reasonable list SNR.


73,
Eric
Mooderator
/elecraft.com/

On 6/4/2019 12:07 PM, Gary Smith wrote:

Possibly, but then you won't have to read
the bellyaching about how it wasn't made
the way someone wanted.

There's always a silver lining :)


Gary



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Re: [Elecraft] K4: superhet vs. direct sampling

[Bill Johnson]

Wayne, all these options and modernizations, even though I love my K3S and 
really don't need to upgrade, I will be "forced" to break down and buy one.

72 & 73,
Bill
K9YEQ
FT'er for K2, KX1, KX3, KXPA100,  KAT500, W2, etc. 

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Wayne Burdick
Sent: Tuesday, June 4, 2019 9:19 PM
To: Elecraft Reflector 
Subject: [Elecraft] K4: superhet vs. direct sampling

The superhet module buys a lot of BDR improvement. But also -- a subtlety I've 
failed to mention so far -- the superhet module is intended to somewhat improve 
2 kHz IMDDR3 *and* make this figure more repeatable. 

Q: Say what?

A: As Rob Sherwood noted many times before finally immortalizing this point in 
his must-read footnotes, A-to-D converters sharing the same part number are not 
all created equal. The long-time previous occupant of his Top Spot benefitted 
from a never-corroborated monotonicity in its ADC's LSBs. An act of god. The 
product of a very good day at the silicon foundry when, serendipitously, all 
the bunny suits were defect-free, and no one was exhaling molecules of grain 
alcohol or other substances from the night before.

That said, most ops can get by without the extra BDR and IMDDR3, because 
they're not situated in the RF equivalent of the Gulf Stream. Hence the 
different K4 models. 

73,
Wayne
N6KR


> On Jun 4, 2019, at 5:10 PM, Lyle Johnson  wrote:
> 
> Mark,
> 
> The "20 dB lower than a K3" figure is an estimate for 100 kHz Blocking 
> Dynamic Range rather than the 2 kHz Narrow Spaced Dynamic Range.
> 
> The K3 is listed at 140 to 150 dB (depending on model, synthesizer, etc) on 
> Sherwood's Receiver Test Data page.  The K4 series without the "HD" option 
> are estimated to be in the 120 to 130 dB range, typical of other direct 
> sampling SDR products (Flex, Apache, Icom, ...).
> 
> 73,
> 
> Lyle KK7P
> 
> On 6/4/19 4:00 PM, mark roz via Elecraft wrote:
>> Before putting my money up front for the first run of K4D I need to 
>> know what is the dynamic range of the K4D RX at 2kHz spacing. K3 is 105 dB 
>> and K4D? If it is 20dB lower than K3 than it would be 85dB-correct?



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[Elecraft] K4: superhet vs. direct sampling

[Wayne Burdick]

The superhet module buys a lot of BDR improvement. But also -- a subtlety I've 
failed to mention so far -- the superhet module is intended to somewhat improve 
2 kHz IMDDR3 *and* make this figure more repeatable. 

Q: Say what?

A: As Rob Sherwood noted many times before finally immortalizing this point in 
his must-read footnotes, A-to-D converters sharing the same part number are not 
all created equal. The long-time previous occupant of his Top Spot benefitted 
from a never-corroborated monotonicity in its ADC's LSBs. An act of god. The 
product of a very good day at the silicon foundry when, serendipitously, all 
the bunny suits were defect-free, and no one was exhaling molecules of grain 
alcohol or other substances from the night before.

That said, most ops can get by without the extra BDR and IMDDR3, because 
they're not situated in the RF equivalent of the Gulf Stream. Hence the 
different K4 models. 

73,
Wayne
N6KR


> On Jun 4, 2019, at 5:10 PM, Lyle Johnson  wrote:
> 
> Mark,
> 
> The "20 dB lower than a K3" figure is an estimate for 100 kHz Blocking 
> Dynamic Range rather than the 2 kHz Narrow Spaced Dynamic Range.
> 
> The K3 is listed at 140 to 150 dB (depending on model, synthesizer, etc) on 
> Sherwood's Receiver Test Data page.  The K4 series without the "HD" option 
> are estimated to be in the 120 to 130 dB range, typical of other direct 
> sampling SDR products (Flex, Apache, Icom, ...).
> 
> 73,
> 
> Lyle KK7P
> 
> On 6/4/19 4:00 PM, mark roz via Elecraft wrote:
>> Before putting my money up front for the first run of K4D I need to know 
>> what is the dynamic range
>> of the K4D RX at 2kHz spacing. K3 is 105 dB and K4D? If it is 20dB lower 
>> than K3 than it would be 85dB-correct?



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Re: [Elecraft] K3: Antenna not connecting on change to BC frequencies

[Nr4c]

Maybe the question is does the K3 store antenna selection for bands other than 
ham bands?

Sent from my iPhone
...nr4c. bill


> On Jun 4, 2019, at 9:09 PM, Nigel  wrote:
> 
> I recently purchased K3-100 s/n 20xx fitted with 2.7/400/250 filters, KAT3,
> KIO3 & KBPF3. Loaded into memory-3 is 3535 cw and in memory-1 0.917.5
> AM. 
> 
> If, after selecting memory 3 I select memory 1, the frequency changes but
> the antenna does not reconnect. (a weak signal is heard). If I tap ANT,
> A/B or REV the antenna connects and levels jump to 40 over S9. 
> 
> Tuning down from 1.800 there is a relay change click heard at 1.700, at this
> relay change the antenna also disconnects.   Rocking the vfo up and down
> about 1.700 connects and disconnects the antenna.
> 
> 
> 
> Is this a menu setting I am missing or something else?  Suggestions?
> 
> 73
> 
> Nigel ZL2DF
> 
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[Elecraft] K3: Antenna not connecting on change to BC frequencies

[Nigel]

I recently purchased K3-100 s/n 20xx fitted with 2.7/400/250 filters, KAT3,
KIO3 & KBPF3. Loaded into memory-3 is 3535 cw and in memory-1 0.917.5
AM. 

If, after selecting memory 3 I select memory 1, the frequency changes but
the antenna does not reconnect. (a weak signal is heard). If I tap ANT,
A/B or REV the antenna connects and levels jump to 40 over S9. 

Tuning down from 1.800 there is a relay change click heard at 1.700, at this
relay change the antenna also disconnects.   Rocking the vfo up and down
about 1.700 connects and disconnects the antenna.

 

Is this a menu setting I am missing or something else?  Suggestions?

73

Nigel ZL2DF

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Re: [Elecraft] Alpha Antenna/KX3.

[David Thompson via Elecraft]

Hi Rich and the reflector…

I use a Wolf River Coils mini with the large whip (210in I think) for portable 
ops. It came with three radials. 

After reading Rudy Severns’ articles, I built a set of 16+- ft radials (total 
of 18 - 3ea of 6 into 1) for the unit. I have only anecdotal evidence, but I 
think the more robust radial field improves the antenna system. They take only 
a few minutes to deploy and coil easily for storage in the travel bag I use.

It’s a good recommendation, Rich!

David Thompson, AG7TX
Jack of All Trades
Master of None
dbthomp...@me.com




> On Jun 4, 2019, at 17:06, rich hurd WC3T  wrote:
> 
> I’ve gotten good success with a Superantenna, a Buddistick, and an EFHW and
> my KX3.   The verticals definitely need robust counterpoises.
> 
> On Tue, Jun 4, 2019 at 18:50 Ian Kahn, NV4C  wrote:
> 
>> Gene,
>> 
>> I've had a lot of fun on vacations with my KX2 and a BuddiStick by
>> BuddiPole:
>> 
>> http://www.buddipole.com/
>> 
>> The price, for the Deluxe kit, is probably comparable to what you'd pay
>> for an AlexLoop. I just clamp mine to the arm of the chair, the table,
>> whatever, with the included clamp, string out the included radial, and
>> have fun. It tunes great with the combination of tapped loading coil and
>> the built-in tuner on my KX2. I also have the tripod BuddiPole sells,
>> but don't like it as much as the clamp. It's a very small tripod, and
>> the way the antenna and mount plate are designed, it is very easy to get
>> heavy to one side and tip the antenna over.
>> 
>> Hope this helps.
>> 
>> 73 de,
>> 
>> Ian, NV4C
>> 
>> On 6/4/19 11:07 AM, Gene Moore via Elecraft wrote:
>>> I have just submitted my order for my KX3. As part of the next step, I
>> am continuing my search for an antenna. At this point, I am leaning towards
>> an Alpha Antenna mag loop. Like some, I have HOA restrictions in my first
>> and second home and this somewhat limits me as to what I can put up. I have
>> space on my back deck as well as a terrace in my condo.
>>> 
>>> Can anyone provide feedback regarding an Alpha Antenna or possibly have
>> any additional suggestions that might be helpful.
>>> 
>>> Thanks
>>> 
>>> Gene Moore, NC1L
>>> 
>>> Sent from my iPhone
>>> __
>>> Elecraft mailing list
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>> __
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>> 
> -- 
> 72,
> Rich Hurd / WC3T / DMR: 3142737
> Northampton County RACES, EPA-ARRL Public Information Officer for Scouting
> Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
> *FN20is*
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Re: [Elecraft] 60 meters

[Don Wilhelm]

The other easy solution is to use only 5 channel hopping memories and 
create a Macro to move the VFO A up or down 1.5kHz depending on whether 
you stored SSB or CW frequencies in VFO A.  The frequency shift is 
constant for all channels, so one Macro will do for all channels.

Assign the Macro to a PF button.

73,
Don W3FPR

On 6/4/2019 7:52 PM, Fred Jensen wrote:
That doesn't work Wes, the problem is simpler than that.  However, Don 
has confirmed the behavior, and now it's time for me to be a "Real Ham" 
and do something here in NE Sparks NV [instead of on the list] to fix 
"my" problem.  Don's [and one other's] solution with 10 memories is a 
first-run candidate. Since I haven't been on SSB in years, ignoring what 
happens to VFO B may be an answer too. [:-)



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Re: [Elecraft] K4 RX dynamic range

[Lyle Johnson]

Mark,

The "20 dB lower than a K3" figure is an estimate for 100 kHz Blocking 
Dynamic Range rather than the 2 kHz Narrow Spaced Dynamic Range.


The K3 is listed at 140 to 150 dB (depending on model, synthesizer, etc) 
on Sherwood's Receiver Test Data page.  The K4 series without the "HD" 
option are estimated to be in the 120 to 130 dB range, typical of other 
direct sampling SDR products (Flex, Apache, Icom, ...).


73,

Lyle KK7P

On 6/4/19 4:00 PM, mark roz via Elecraft wrote:

Before putting my money up front for the first run of K4D I need to know what 
is the dynamic range
of the K4D RX at 2kHz spacing. K3 is 105 dB and K4D? If it is 20dB lower than 
K3 than it would be 85dB-correct?

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Re: [Elecraft] Alpha Antenna/KX3.

[rich hurd WC3T]

I’ve gotten good success with a Superantenna, a Buddistick, and an EFHW and
my KX3.   The verticals definitely need robust counterpoises.

On Tue, Jun 4, 2019 at 18:50 Ian Kahn, NV4C  wrote:

> Gene,
>
> I've had a lot of fun on vacations with my KX2 and a BuddiStick by
> BuddiPole:
>
> http://www.buddipole.com/
>
> The price, for the Deluxe kit, is probably comparable to what you'd pay
> for an AlexLoop. I just clamp mine to the arm of the chair, the table,
> whatever, with the included clamp, string out the included radial, and
> have fun. It tunes great with the combination of tapped loading coil and
> the built-in tuner on my KX2. I also have the tripod BuddiPole sells,
> but don't like it as much as the clamp. It's a very small tripod, and
> the way the antenna and mount plate are designed, it is very easy to get
> heavy to one side and tip the antenna over.
>
> Hope this helps.
>
> 73 de,
>
> Ian, NV4C
>
> On 6/4/19 11:07 AM, Gene Moore via Elecraft wrote:
> > I have just submitted my order for my KX3. As part of the next step, I
> am continuing my search for an antenna. At this point, I am leaning towards
> an Alpha Antenna mag loop. Like some, I have HOA restrictions in my first
> and second home and this somewhat limits me as to what I can put up. I have
> space on my back deck as well as a terrace in my condo.
> >
> > Can anyone provide feedback regarding an Alpha Antenna or possibly have
> any additional suggestions that might be helpful.
> >
> > Thanks
> >
> > Gene Moore, NC1L
> >
> > Sent from my iPhone
> > __
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft@mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to nv4c@gmail.com
> __
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>
-- 
72,
Rich Hurd / WC3T / DMR: 3142737
Northampton County RACES, EPA-ARRL Public Information Officer for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*
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Re: [Elecraft] 60 meters

[Fred Jensen]

That doesn't work Wes, the problem is simpler than that.  However, Don 
has confirmed the behavior, and now it's time for me to be a "Real Ham" 
and do something here in NE Sparks NV [instead of on the list] to fix 
"my" problem.  Don's [and one other's] solution with 10 memories is a 
first-run candidate. Since I haven't been on SSB in years, ignoring what 
happens to VFO B may be an answer too. [:-)


73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 6/4/2019 4:31 PM, Wes wrote:
I do what Don suggests.  That said, I think if you do an A/B it will 
fix your problem, if I understand it correctly.


Wes  N7WS

On 6/4/2019 4:21 PM, Don Wilhelm wrote:

Fred and all,

I have observed what you found.  On Channel Hopping, VFO A follows 
the hop to the next channel, but VFO B does not.


While a "fix" may be coming sometime, it is not likely to be coming 
soon.  So I propose a workaround.


The simple solution is to set 10 channel hopping memories instead of 
only 5.  5 for SSB/DATA and 5 more for CW.  I doubt that you are 
using all 100 memory slots in the K3.


Arrange them any way you want - each CW memory next to the SSB 
memory, or go through all 5 SSB memories and then the next 5 are CW.  
Put some identifier in the label so you can see which is which 
without referring to the frequency.


73,
Don W3FPR

On 6/4/2019 3:02 PM, Fred Jensen wrote:
This began as a simple question, I can't understand why it is so 
hard to explain:  K3 frequency memories hold frequency, mode, and 
DSP BW for both VFO A and VFO B.  I used the K3 Frequency Editor to 
load the CW parameters into VFO A and USB parameters into VFO B in 5 
consecutive memory channels.  Those 5 are "ganged together" with an 
"*" in the name, IIRC.


When I rotate the Big Knob, I expected the VFO's to rotate through 
the channels [end-around].  VFO A does, but VFO B does not follow, 
it remains on whatever channel I originally selected. 




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Re: [Elecraft] Alpha Antenna/KX3.

[Walter Underwood]

The capacitor is so critical that I always look for it in the product 
description. If they don’t mention the kind of capacitor, I assume that they 
don’t know what they are doing.

We know the MFJ mag loop tuners use butterfly capacitors because you can buy 
the capacitors from MFJ. The W4OP loop describes avoiding wipers in the 
variable capacitor.

I’ve considered getting an MFJ loop tuner and some flexible copper tubing, the 
stuff used to hook up refrigerators. But I tune around too much.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jun 4, 2019, at 4:24 PM, Mark Petiford via Elecraft 
>  wrote:
> 
> Gene,
> 
> I don't usually comment on products like antennas.  I cannot, however, resist 
> this one:
> 
> I cannot comment on the current Alpha Antenna Mag Loop, because I don't have 
> one.  My Alpha loop is 4 or 5 years old.  It was on sale and heavily 
> discounted, so I purchased it without looking into its construction.  After I 
> bought it I learned that is wasn't worth much of anything.  I won't tell you 
> how much I paid for it; even on sale I am embarrassed.
> 
> 
> Keep in mind that one of the contributors to inefficiencies in a mag loop is 
> the resistance of the loop (which is the inductor) and parallel capacitor.  
> The first contributor of resistance was the overlapping anodized aluminum 
> sections that were bolted together.  Each overlap had a few milliohms or more 
> of resistance.  With 8 of these joints, the resistance added up, and a few 
> milliohms is a lot in a tank circulation circuit.
> 
> 
> The second bad feature was the capacitor.  Again, the resistance must be kept 
> to a minimum.  The lossy part of a variable capacitor is the wipers that 
> transfer current from the rotor (which moves) to a terminal that doesn't so 
> you can pick the current up there.  The way to eliminate that resistance is 
> to use a butterfly capacitor (which are had to find), or use a dual section 
> capacitor.  Current goes in one stator, to the rotor, and out through the 
> other stator.  You end up with 2 caps in series, and no wipers in the current 
> path.
> 
> I never made a contact with the antenna except very local ones.  I have had 
> much better success with the 26ft. wire and 16 ft. counterpose Walter (K6WRU) 
> mentioned (exact dimensions are NOT important), and I would have almost $300 
> back in my pocket.  Oops!  I almost let the price slip.
> 
> That was the first antenna I had purchased in 40 years.  It left such a bad 
> taste in my mouth that I went out to Palomar Engineers website and bought 
> Kurt N. Sterba's book, "Kurt Speaks Out" and read it from cover to cover.  I 
> feel better now.  The antenna sits in the back of my garage waiting to be 
> broken down for parts.  It has a great tripod, and a nifty little RF 
> indicator in the form of a neon bulb.  I will probably give the cap to some 
> young ham to use in a transmitter project.
> 
> 
> Do what Jim (K9YC) said!  Get educated first, then do your research on how 
> the thing is made and works before you buy.  If Alpha has improved the 
> antenna, I would love to hear about it.
> 
> I just checked their website, and it appears they have switched to coax for 
> the loop.  Much better.  I cannot see what capacitor they use.
> 
> Sorry, Eric.  Way too long!
> 
> 
> Mark
> KE6BB
> 
> KX3, AX1, and some wire.
> 
> 
> 
> On Tuesday, June 4, 2019, 8:19:50 AM PDT, Gene Moore via Elecraft 
>  wrote:  
> 
> I have just submitted my order for my KX3. As part of the next step, I am 
> continuing my search for an antenna. At this point, I am leaning towards an 
> Alpha Antenna mag loop. 
> 
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[Elecraft] Alpha Antenna/KX3

[Andy Durbin]

If you want a mag loop why not build one?   I had fun building mine and I made 
enough QSO with to have made it worth while.   As others have said they have 
narrow bandwidth and mine is temperature sensitive.  I got used to having to 
retune it as soon as the morning sun reached it.

Maybe my presentation will give you some ideas.  - 
http://www.w7tbc.org/downloads.php?do=file=369

73,
Andy, k3wyc

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Re: [Elecraft] 60 meters

[Wes]

I do what Don suggests.  That said, I think if you do an A/B it will fix your 
problem, if I understand it correctly.


Wes  N7WS

On 6/4/2019 4:21 PM, Don Wilhelm wrote:

Fred and all,

I have observed what you found.  On Channel Hopping, VFO A follows the hop to 
the next channel, but VFO B does not.


While a "fix" may be coming sometime, it is not likely to be coming soon.  So 
I propose a workaround.


The simple solution is to set 10 channel hopping memories instead of only 5.  
5 for SSB/DATA and 5 more for CW.  I doubt that you are using all 100 memory 
slots in the K3.


Arrange them any way you want - each CW memory next to the SSB memory, or go 
through all 5 SSB memories and then the next 5 are CW.  Put some identifier in 
the label so you can see which is which without referring to the frequency.


73,
Don W3FPR

On 6/4/2019 3:02 PM, Fred Jensen wrote:
This began as a simple question, I can't understand why it is so hard to 
explain:  K3 frequency memories hold frequency, mode, and DSP BW for both VFO 
A and VFO B.  I used the K3 Frequency Editor to load the CW parameters into 
VFO A and USB parameters into VFO B in 5 consecutive memory channels.  Those 
5 are "ganged together" with an "*" in the name, IIRC.


When I rotate the Big Knob, I expected the VFO's to rotate through the 
channels [end-around].  VFO A does, but VFO B does not follow, it remains on 
whatever channel I originally selected. 


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Re: [Elecraft] Alpha Antenna/KX3.

[Mark Petiford via Elecraft]

 Gene,

I don't usually comment on products like antennas.  I cannot, however, resist 
this one:

I cannot comment on the current Alpha Antenna Mag Loop, because I don't have 
one.  My Alpha loop is 4 or 5 years old.  It was on sale and heavily 
discounted, so I purchased it without looking into its construction.  After I 
bought it I learned that is wasn't worth much of anything.  I won't tell you 
how much I paid for it; even on sale I am embarrassed.


Keep in mind that one of the contributors to inefficiencies in a mag loop is 
the resistance of the loop (which is the inductor) and parallel capacitor.  The 
first contributor of resistance was the overlapping anodized aluminum sections 
that were bolted together.  Each overlap had a few milliohms or more of 
resistance.  With 8 of these joints, the resistance added up, and a few 
milliohms is a lot in a tank circulation circuit.


The second bad feature was the capacitor.  Again, the resistance must be kept 
to a minimum.  The lossy part of a variable capacitor is the wipers that 
transfer current from the rotor (which moves) to a terminal that doesn't so you 
can pick the current up there.  The way to eliminate that resistance is to use 
a butterfly capacitor (which are had to find), or use a dual section capacitor. 
 Current goes in one stator, to the rotor, and out through the other stator.  
You end up with 2 caps in series, and no wipers in the current path.

I never made a contact with the antenna except very local ones.  I have had 
much better success with the 26ft. wire and 16 ft. counterpose Walter (K6WRU) 
mentioned (exact dimensions are NOT important), and I would have almost $300 
back in my pocket.  Oops!  I almost let the price slip.

That was the first antenna I had purchased in 40 years.  It left such a bad 
taste in my mouth that I went out to Palomar Engineers website and bought Kurt 
N. Sterba's book, "Kurt Speaks Out" and read it from cover to cover.  I feel 
better now.  The antenna sits in the back of my garage waiting to be broken 
down for parts.  It has a great tripod, and a nifty little RF indicator in the 
form of a neon bulb.  I will probably give the cap to some young ham to use in 
a transmitter project.


Do what Jim (K9YC) said!  Get educated first, then do your research on how the 
thing is made and works before you buy.  If Alpha has improved the antenna, I 
would love to hear about it.

I just checked their website, and it appears they have switched to coax for the 
loop.  Much better.  I cannot see what capacitor they use.

Sorry, Eric.  Way too long!


Mark
KE6BB

KX3, AX1, and some wire.


   
 On Tuesday, June 4, 2019, 8:19:50 AM PDT, Gene Moore via Elecraft 
 wrote:  
 
 I have just submitted my order for my KX3. As part of the next step, I am 
continuing my search for an antenna. At this point, I am leaning towards an 
Alpha Antenna mag loop. 
  
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Re: [Elecraft] 60 meters

[Don Wilhelm]

Fred and all,

I have observed what you found.  On Channel Hopping, VFO A follows the 
hop to the next channel, but VFO B does not.


While a "fix" may be coming sometime, it is not likely to be coming 
soon.  So I propose a workaround.


The simple solution is to set 10 channel hopping memories instead of 
only 5.  5 for SSB/DATA and 5 more for CW.  I doubt that you are using 
all 100 memory slots in the K3.


Arrange them any way you want - each CW memory next to the SSB memory, 
or go through all 5 SSB memories and then the next 5 are CW.  Put some 
identifier in the label so you can see which is which without referring 
to the frequency.


73,
Don W3FPR

On 6/4/2019 3:02 PM, Fred Jensen wrote:
This began as a simple question, I can't understand why it is so hard to 
explain:  K3 frequency memories hold frequency, mode, and DSP BW for 
both VFO A and VFO B.  I used the K3 Frequency Editor to load the CW 
parameters into VFO A and USB parameters into VFO B in 5 consecutive 
memory channels.  Those 5 are "ganged together" with an "*" in the name, 
IIRC.


When I rotate the Big Knob, I expected the VFO's to rotate through the 
channels [end-around].  VFO A does, but VFO B does not follow, it 
remains on whatever channel I originally selected.



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[Elecraft] K4 RX dynamic range

[mark roz via Elecraft]

Before putting my money up front for the first run of K4D I need to know what 
is the dynamic range
of the K4D RX at 2kHz spacing. K3 is 105 dB and K4D? If it is 20dB lower than 
K3 than it would be 85dB-correct?
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[Elecraft] K4 RX dynamic range

[mark roz via Elecraft]

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[Elecraft] K4 RX dynamic range

[mark roz via Elecraft]

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Re: [Elecraft] Alpha Antenna/KX3.

[Ian Kahn, NV4C]

Gene,

I've had a lot of fun on vacations with my KX2 and a BuddiStick by 
BuddiPole:


http://www.buddipole.com/

The price, for the Deluxe kit, is probably comparable to what you'd pay 
for an AlexLoop. I just clamp mine to the arm of the chair, the table, 
whatever, with the included clamp, string out the included radial, and 
have fun. It tunes great with the combination of tapped loading coil and 
the built-in tuner on my KX2. I also have the tripod BuddiPole sells, 
but don't like it as much as the clamp. It's a very small tripod, and 
the way the antenna and mount plate are designed, it is very easy to get 
heavy to one side and tip the antenna over.


Hope this helps.

73 de,

Ian, NV4C

On 6/4/19 11:07 AM, Gene Moore via Elecraft wrote:

I have just submitted my order for my KX3. As part of the next step, I am 
continuing my search for an antenna. At this point, I am leaning towards an 
Alpha Antenna mag loop. Like some, I have HOA restrictions in my first and 
second home and this somewhat limits me as to what I can put up. I have space 
on my back deck as well as a terrace in my condo.

Can anyone provide feedback regarding an Alpha Antenna or possibly have any 
additional suggestions that might be helpful.

Thanks

Gene Moore, NC1L

Sent from my iPhone
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[Elecraft] Loops

[Peter West]

I ran an AlexLoop with my KX-2 from the “no antennas” balcony of a fourth-floor 
apartment for a year while we rebuilt the house and my contest station. Loops 
will work in places where wire antennas are banned or won’t work at all due to 
local noise (like an apartment balcony). Members of our club set up antennas at 
a special event under a concrete overhang at Toronto’s Central Reference 
Library. All the wire antennas heard was noise while the Alexloop got out just 
fine. Having said that the need to retune every few kHz is an issue and CW and 
digital modes are more effective than SSB. I’ve run loops, end-feds, dipoles, 
verticals and beams and the basics apply. In general wire antennas properly 
installed work better. Dipoles work better (quieter and less possible 
interference) than end-feds but end-feds are way easier to get up. If I 
couldn’t get a wire antenna up (I once put a 15-meter dipole up using popsicle 
sticks on the peak of roof of a two-storey linked house that was invisible from 
the ground but set off the smoke detectors if I ran more than 20 watts) I'd 
consider a mobile antenna like a Tarheel with radials and if that wasn’t 
possible I’d run a loop. Let’s put it this way, I’m not selling my Alexloop.

73 - Peter - VE3HG
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[Elecraft] K4 Production Prognosis

[dhhdeh]

James-K8JHR (who I do not know but whose research on headsets and mics I 
greatly appreciate reading) asked some detailed and pointed questions, 
all reasonable IMO, in consideration of the offer to prospective K4 
owners to advance significant funds for product development and in 
return a place in a sales queue.  Wouldn't a bank's commercial lending 
officer ask such questions if a business were seeking a commercial loan 
from them? As a 50 year career banker, I can assure you that he/she 
indeed would.  In this situation you are the lender and giving an 
interest free loan with no promise of anything other than a queue position.


I owned an K3 from its 2007/2008 beginnings until four years ago. When I 
sold my K3 (for numerous reasons), I also left this list in part because 
of the frequent snippy and defense comments that seemed to emerge 
anytime anything difficult, critical or probing was posted here. I see 
not much has changed.


Enjoy your K4's. Save your flames. I'm moving on ... again.

Cheers,

N1LQ-David


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[Elecraft] Case and dust cover clarification

[Rose]

I've already had two inquiries ...

Yes, I -will- continue to sew K3 and K3s cases -and- dust covers.
I'll just not be making a K4 carrying case.

73!

Rose - N7HKW
1-406-560-3738
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Re: [Elecraft] K2 USB to 9 Pin Cable (info)

[Don Wilhelm]

Harry and all,

Yes, that clarifies things.
Pins 7 and 8 of the DE9 connector at the K2 end of the cable must NOT 
connect to the K2 AUX IO connector.
But the wires coming from the cable (NOT from the D-sub connector), can 
be connected together.  Applications that expect CTS/RTS handshaking 
will need that connection - most applications will work without it.


73,
Don W3FPR

On 6/4/2019 3:26 PM, Harry Yingst via Elecraft wrote:

  To Clarify this information
-
The color codes are from the wires on the FTDI USB Cable 
(USB-RS232-WE-1800-BT-0.0)
-
The only wires that will be connected are the
Yellow Wire that will be connected to Pin 2 of the Male 9 pin connector
Orange Wite that will be connected to Pin 3 of the Male 9 pin connector
Black Wire that will be connected to Pin 5 of the Male 9 pin connector
-
The Green Wire on the USB cable is the RTS Line
The Brown Wire on the USB cable is the CTS line
The Green and Brown Wires should be connected to each other and nothing else.-
The Red wire is unused
-
This should clear up any confusion

  
  I'm passing this info along for those who may have a K2 and find this useful.


FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0
The cable has a USB plug on one end and is terminated in wires on the other end.
--
Here is the Pin-out to make a USB to K2 Cable

Color - Signal - Notes
Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2
Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2
Black - Gnd - Pin 5 on 9 Pin Connector - Ground
Green - RTS - Tied to CTS Line
Brown - CTS - Tied to RTC Line
Red - Power - Unused - 0.0v
--
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[Elecraft] No K4 carrying cases

[Rose]

Hello all ...

Because of the cost of getting set up to make carrying
cases for the new K4 I'll not be making them.  The cost
is mostly related to the protective end caps.

I -will- be making dust covers for the K4.

73!

Rose - N7HKW
1-406-560-3738
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Re: [Elecraft] K2 USB to 9 Pin Cable (info)

[Harry Yingst via Elecraft]

 Yes it was a typo it should have been RTS

The RTS (Request To Send) and CTS (Clear To Send) probably don't need
to be tied together but some programs may want it so I tied them together.


   





 On Tuesday, June 4, 2019, 3:30:20 PM EDT, Andy Durbin  
wrote:  
 
 "Before plugging that into the K2 AUX IO connector, the Green, Brown, and Red 
conductors must be cut or damage to the K2 and/or the adapter can be damaged."

It appears to me that the only AUX connector pins that are used by this 
proposed cable are 2, 3, and 5.    If the K2 will accept RS-232 levels without 
damage then I don't see how any damage can be done by the proposed cable.  The 
cable specification would be clearer if the meaning of "RTC" were known.  I 
suspect it's a typo for RTS and that the CTS and RTS wires are tied together 
but not connected to the AUX connector.

73,
Andy, k3wyc



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[Elecraft] K2 USB to 9 Pin Cable (info)

[Andy Durbin]

"Before plugging that into the K2 AUX IO connector, the Green, Brown, and Red 
conductors must be cut or damage to the K2 and/or the adapter can be damaged."

It appears to me that the only AUX connector pins that are used by this 
proposed cable are 2, 3, and 5.If the K2 will accept RS-232 levels without 
damage then I don't see how any damage can be done by the proposed cable.  The 
cable specification would be clearer if the meaning of "RTC" were known.  I 
suspect it's a typo for RTS and that the CTS and RTS wires are tied together 
but not connected to the AUX connector.

73,
Andy, k3wyc



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Re: [Elecraft] K2 USB to 9 Pin Cable (info)

[Harry Yingst via Elecraft]

 To Clarify this information
-
The color codes are from the wires on the FTDI USB Cable 
(USB-RS232-WE-1800-BT-0.0)
-
The only wires that will be connected are the
Yellow Wire that will be connected to Pin 2 of the Male 9 pin connector
Orange Wite that will be connected to Pin 3 of the Male 9 pin connector
Black Wire that will be connected to Pin 5 of the Male 9 pin connector
-
The Green Wire on the USB cable is the RTS Line
The Brown Wire on the USB cable is the CTS line
The Green and Brown Wires should be connected to each other and nothing else.-
The Red wire is unused 
-
This should clear up any confusion

 
 I'm passing this info along for those who may have a K2 and find this useful.

FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0
The cable has a USB plug on one end and is terminated in wires on the other end.
--
Here is the Pin-out to make a USB to K2 Cable

Color - Signal - Notes
Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2
Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2
Black - Gnd - Pin 5 on 9 Pin Connector - Ground
Green - RTS - Tied to CTS Line
Brown - CTS - Tied to RTC Line
Red - Power - Unused - 0.0v
--
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Re: [Elecraft] K4 Production Prognosis

[Gary Smith]

Possibly, but then you won't have to read 
the bellyaching about how it wasn't made 
the way someone wanted.

There's always a silver lining :)


Gary

> Yes, but I might die before it ships.
> 
> Doug
> 
> "The difference between stupidity and genius is that genius has its
> limits." Albert Einstein 
> 
> -Original Message-
> 
> 
>  No one will die if it ships late.  Period.
> 
> flame away.. Mike
> 
> 
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> 
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Re: [Elecraft] 60 meters

[Fred Jensen]

This began as a simple question, I can't understand why it is so hard to 
explain:  K3 frequency memories hold frequency, mode, and DSP BW for 
both VFO A and VFO B.  I used the K3 Frequency Editor to load the CW 
parameters into VFO A and USB parameters into VFO B in 5 consecutive 
memory channels.  Those 5 are "ganged together" with an "*" in the name, 
IIRC.


When I rotate the Big Knob, I expected the VFO's to rotate through the 
channels [end-around].  VFO A does, but VFO B does not follow, it 
remains on whatever channel I originally selected.


The sequence M>V, Select memory, M>V sets both VFO's to the parameters 
stored in that memory, as one would expect.  Selecting a new memory with 
the BK should load the parameters for that memory into both VFO's, or so 
it would seem.  It does for VFO A. It doesn't for VFO B.  My question 
was, "Is this a bug or intentional behavior?"  If it's intentional, I'd 
be curious what the use case is for that behavior.  I'm also aware this 
is a K3 question and likely to get lost in all the K4 commotion.


73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 6/3/2019 4:13 PM, K8TE wrote:

While you can scan or dial through VFO A, once you "land" on a particular
channel, the VFO B frequency and mode associated with that channel is
available by using the VFO A/B button.

I originally loaded the 60m CW frequencies in VFO A for my 60m channels
since I'm more likely to use them working SOTA activators.  However, I
usually scan the SSB channels.  Thus, I swapped between VFO A and B so I can
scan USB channels and select the appropriate VFO B CW channels when needed.
This comes in handy when someone suggests 60m for USB or when I see a SOTA
dude spotted on 60m CW.

73, Bill, K8TE, waiting "patiently" to return home and start using HF again!
BCNU at Ham-Com.



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Re: [Elecraft] Alpha Antenna/KX3.

[Jim Brown]

On 6/4/2019 11:42 AM, Tox wrote:

I have had poor luck with search and pounce ssb my alexloop, but that is
likely due to lack of experience with it and selectivity as much as
anything.


SSB QRP with a compromise antenna are both negative parts of the 
equation -- SSB is about ten dB behind CW because of noise added by the 
additional bandwidth it requires.



I understand that it is very narrow bandwidth (high q?), but it occurs to
me that if they are being used for ssb at all, that there should be enough
bandwidth to handle current digital modes.

Bandwidth is quite enough for SSB.

Has anyone tried using a magloop as a gain antenna for ft8?


It's not a "gain" antenna. It's a compromise antenna, with the ability 
to null out a single noise source on receive. FT8 is 6-10 dB better than 
CW with very good operators on both ends, so FT8 is a very good mode for 
QRP and compromise antennas.



I may take mine
for a drive with my KX3 to find a hilltop...


That's a great idea -- the hilltop can also be good for 6-10 dB. 6dB is 
4X the power, one S-unit, 10 dB is 10X the power, two S-units.


73, Jim K9YC


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Re: [Elecraft] K2 USB to 9 Pin Cable (info)

[Harry Yingst via Elecraft]

 Please read what I posted and you will see it is correct
The color codes are from the USB-RS232-WE-1800-BT-0.0


On Tuesday, June 4, 2019, 2:42:53 PM EDT, Don Wilhelm 
 wrote:  
 
 Harry,

Before plugging that into the K2 AUX IO connector, the Green, Brown, and 
Red conductors must be cut or damage to the K2 and/or the adapter can be 
damaged.  Note that the connector on the K2 is labeled AUX IO, and that 
is for a reason - it is NOT RS-232.

At the very least, if that adapter ties RTS and CTS together, that will 
put +12 volts on the VRFDET internal K2 signal line and the K2 will not 
transmit with that condition present, and it may damage the MCU pin 2 
input.  If that pin is damaged, the K2 will transmit but will have no 
power control and the power will go to the maximum which will cause 
additional damage if that condition exists for more than a very short time.

Build the PC to K2 cable shown in the KIO2 and KPA100 manuals and plug 
it into that adapter or most any other FTDI USB to Serial adpater.

73,
Don W3FPR

On 6/4/2019 2:10 PM, Harry Yingst via Elecraft wrote:
> I'm passing this info along for those who may have a K2 and find this useful.
> 
> FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0
> The cable has a USB plug on one end and is terminated in wires on the other 
> end.
> --
> Here is the Pin-out to make a USB to K2 Cable
> 
> Color - Signal - Notes
> Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2
> Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2
> Black - Gnd - Pin 5 on 9 Pin Connector - Ground
> Green - RTS - Tied to CTS Line
> Brown - CTS - Tied to RTC Line
> Red - Power - Unused - 0.0v
> --
  
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Re: [Elecraft] K2 USB to 9 Pin Cable (info)

[Don Wilhelm]

Harry,

Before plugging that into the K2 AUX IO connector, the Green, Brown, and 
Red conductors must be cut or damage to the K2 and/or the adapter can be 
damaged.  Note that the connector on the K2 is labeled AUX IO, and that 
is for a reason - it is NOT RS-232.


At the very least, if that adapter ties RTS and CTS together, that will 
put +12 volts on the VRFDET internal K2 signal line and the K2 will not 
transmit with that condition present, and it may damage the MCU pin 2 
input.  If that pin is damaged, the K2 will transmit but will have no 
power control and the power will go to the maximum which will cause 
additional damage if that condition exists for more than a very short time.


Build the PC to K2 cable shown in the KIO2 and KPA100 manuals and plug 
it into that adapter or most any other FTDI USB to Serial adpater.


73,
Don W3FPR

On 6/4/2019 2:10 PM, Harry Yingst via Elecraft wrote:

I'm passing this info along for those who may have a K2 and find this useful.

FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0
The cable has a USB plug on one end and is terminated in wires on the other end.
--
Here is the Pin-out to make a USB to K2 Cable

Color - Signal - Notes
Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2
Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2
Black - Gnd - Pin 5 on 9 Pin Connector - Ground
Green - RTS - Tied to CTS Line
Brown - CTS - Tied to RTC Line
Red - Power - Unused - 0.0v
--

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Re: [Elecraft] Alpha Antenna/KX3.

[Tox]

I have had poor luck with search and pounce ssb my alexloop, but that is
likely due to lack of experience with it and selectivity as much as
anything.

I understand that it is very narrow bandwidth (high q?), but it occurs to
me that if they are being used for ssb at all, that there should be enough
bandwidth to handle current digital modes.

Has anyone tried using a magloop as a gain antenna for ft8? I may take mine
for a drive with my KX3 to find a hilltop...

Scott
AD6YT

On Tue, Jun 4, 2019, 11:34 AM Walter Underwood 
wrote:

> A mag loop needs to be retuned every time you change frequency. If you
> usually
> operate in one spot for a while, say a CW or digital subband, that is
> fine. If you
> tune around, you’ll want something else. You can’t even hear signals on
> other
> frequencies until you tune the mag loop.
>
> If you can run a 26 foot wire, do that. Use a 16 or so foot wire on the
> ground
> as a counterpoise. Connect them to the KX3 with a double binding post
> adaptor
> and press ATU TUNE.
>
> Or you can use a railing-mounted whip, like this one. MFJ also makes a 12
> foot
> whip which might fit this coil. With a short feedline, I’d probably bypass
> the coil
> and let the KX3 ATU do the work.
>
> https://www.mfjenterprises.com/Product.php?productid=MFJ-1622
>
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
>
> > On Jun 4, 2019, at 11:17 AM, Kevin, N4TT  wrote:
> >
> > I have had great luck with the simplest of end-fed antennas and the KX3.
> > Particularly out at the picnic table I can just find a convenient tree to
> > toss up one end with the other end at the table. Seems a longer coax make
> > the end-fed work better. I'm using one cut for 40 with a stub(?) for 20
> > meters. Both bands at least are partially tune in bypass with the
> internal
> > ATU taking care of anything questionable.
> >
> > How it compares with a loop I don't know. I have had much more luck with
> > the end-fed than I've had with a buddipole. I've had more luck with a
> good
> > dipole than the end-fed...
> >
> > 73,
> > Kev N4TT
> >
> > On Tue, Jun 4, 2019 at 11:18 AM Gene Moore via Elecraft <
> > elecraft@mailman.qth.net> wrote:
> >
> >> I have just submitted my order for my KX3. As part of the next step, I
> am
> >> continuing my search for an antenna. At this point, I am leaning
> towards an
> >> Alpha Antenna mag loop. Like some, I have HOA restrictions in my first
> and
> >> second home and this somewhat limits me as to what I can put up. I have
> >> space on my back deck as well as a terrace in my condo.
> >>
> >> Can anyone provide feedback regarding an Alpha Antenna or possibly have
> >> any additional suggestions that might be helpful.
> >>
> >> Thanks
> >>
> >> Gene Moore, NC1L
> >>
> >> Sent from my iPhone
> >> __
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Re: [Elecraft] Alpha Antenna/KX3.

[Jim Brown]

On 6/4/2019 8:07 AM, Gene Moore via Elecraft wrote:

Can anyone provide feedback regarding an Alpha Antenna or possibly have any 
additional suggestions that might be helpful.


Sure. Study the ARRL Antenna Book and the ARRL Handbook chapters on 
antennas. They provide a great BS detector when reading the ads for stuff.


73, Jim K9YC

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Re: [Elecraft] Alpha Antenna/KX3.

[Walter Underwood]

A mag loop needs to be retuned every time you change frequency. If you usually
operate in one spot for a while, say a CW or digital subband, that is fine. If 
you
tune around, you’ll want something else. You can’t even hear signals on other
frequencies until you tune the mag loop.

If you can run a 26 foot wire, do that. Use a 16 or so foot wire on the ground
as a counterpoise. Connect them to the KX3 with a double binding post adaptor
and press ATU TUNE.

Or you can use a railing-mounted whip, like this one. MFJ also makes a 12 foot
whip which might fit this coil. With a short feedline, I’d probably bypass the 
coil
and let the KX3 ATU do the work.

https://www.mfjenterprises.com/Product.php?productid=MFJ-1622

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jun 4, 2019, at 11:17 AM, Kevin, N4TT  wrote:
> 
> I have had great luck with the simplest of end-fed antennas and the KX3.
> Particularly out at the picnic table I can just find a convenient tree to
> toss up one end with the other end at the table. Seems a longer coax make
> the end-fed work better. I'm using one cut for 40 with a stub(?) for 20
> meters. Both bands at least are partially tune in bypass with the internal
> ATU taking care of anything questionable.
> 
> How it compares with a loop I don't know. I have had much more luck with
> the end-fed than I've had with a buddipole. I've had more luck with a good
> dipole than the end-fed...
> 
> 73,
> Kev N4TT
> 
> On Tue, Jun 4, 2019 at 11:18 AM Gene Moore via Elecraft <
> elecraft@mailman.qth.net> wrote:
> 
>> I have just submitted my order for my KX3. As part of the next step, I am
>> continuing my search for an antenna. At this point, I am leaning towards an
>> Alpha Antenna mag loop. Like some, I have HOA restrictions in my first and
>> second home and this somewhat limits me as to what I can put up. I have
>> space on my back deck as well as a terrace in my condo.
>> 
>> Can anyone provide feedback regarding an Alpha Antenna or possibly have
>> any additional suggestions that might be helpful.
>> 
>> Thanks
>> 
>> Gene Moore, NC1L
>> 
>> Sent from my iPhone
>> __
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Re: [Elecraft] Alpha Antenna/KX3.

[Kevin, N4TT]

I have had great luck with the simplest of end-fed antennas and the KX3.
Particularly out at the picnic table I can just find a convenient tree to
toss up one end with the other end at the table. Seems a longer coax make
the end-fed work better. I'm using one cut for 40 with a stub(?) for 20
meters. Both bands at least are partially tune in bypass with the internal
ATU taking care of anything questionable.

How it compares with a loop I don't know. I have had much more luck with
the end-fed than I've had with a buddipole. I've had more luck with a good
dipole than the end-fed...

73,
Kev N4TT

On Tue, Jun 4, 2019 at 11:18 AM Gene Moore via Elecraft <
elecraft@mailman.qth.net> wrote:

> I have just submitted my order for my KX3. As part of the next step, I am
> continuing my search for an antenna. At this point, I am leaning towards an
> Alpha Antenna mag loop. Like some, I have HOA restrictions in my first and
> second home and this somewhat limits me as to what I can put up. I have
> space on my back deck as well as a terrace in my condo.
>
> Can anyone provide feedback regarding an Alpha Antenna or possibly have
> any additional suggestions that might be helpful.
>
> Thanks
>
> Gene Moore, NC1L
>
> Sent from my iPhone
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[Elecraft] K2 USB to 9 Pin Cable (info)

[Harry Yingst via Elecraft]

I'm passing this info along for those who may have a K2 and find this useful.

FTDI makes a USB to RS-232 Cable Part Number: USB-RS232-WE-1800-BT-0.0
The cable has a USB plug on one end and is terminated in wires on the other end.
--
Here is the Pin-out to make a USB to K2 Cable

Color - Signal - Notes
Yellow - RXD - Pin 2 on 9 Pin Connector - RS-232 Data In From K2
Orange - TXD - Pin 3 on 9 Pin Connector - RS-232 Data Out To K2
Black - Gnd - Pin 5 on 9 Pin Connector - Ground
Green - RTS - Tied to CTS Line
Brown - CTS - Tied to RTC Line
Red - Power - Unused - 0.0v
--
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Re: [Elecraft] Filters

[Nr4c]

You don’t need the 6 KHz as the 12 can be used for AM. 

You also don’t need a 13KHz in the Sub Rec. 

Sent from my iPhone
...nr4c. bill


> On May 31, 2019, at 6:38 AM, Michael  wrote:
> 
> Building K3s recommendations for filter slots have sub rec   Filters 
> purchased are 2 ea. 2.7, 2 ea. 500, 2ea 2.1 khz 2 ea. 6khz,  2ea. 13 khz. 
> Thank you
> Michael Kelly
> K3BFP 
> 610 637 9055
> 
> 
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Re: [Elecraft] KX2 menu question

[James Bennett via Elecraft]

Just exit the menu - it will automatically save.

> On Jun 4, 2019, at 8:56 AM, Ivo <3iv...@gmail.com> wrote:
> 
> Newbie with KX2. I'm trying my new KX2. It's a beautiful little device.
> Little confusion. When I change the value of a menu item, how do I save this
> change? I can't find it in the manual. Thank you for your help.
> Ivo, OK2SHI.
> 
> 
> 
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
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[Elecraft] KX2 menu question

[Ivo]

Newbie with KX2. I'm trying my new KX2. It's a beautiful little device.
Little confusion. When I change the value of a menu item, how do I save this
change? I can't find it in the manual. Thank you for your help.
 Ivo, OK2SHI.



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[Elecraft] Sold my K3's now selling all the associated remote control equipment ;

[jlangdon1]

(1)) K3/0 mini SN 0264 (with "K3S" on front plate), plus Remote RIg RRC MK2s
v7 K3 twin control unit with wi-fi board and rubber duck antenna, Elecraft
cable for K3/0 connections, wall wart, and power cables. Original owner,
great condition, working fine when I sold the K3S. New cost $900, will sell
for $450 shipped to CONUS.

 

(2) Remote Rig RRC-1258MKIIs V7 radio unit SN 6845 new condition, never
used, new $285 sell $160 including shipping to CONUS

 

(3) Elecraft RRMINICBL K3/0 mini cable set, new, never used, new $60 sell
$38 including shipping to CONUS

 

(4) Remote Rig RRC-1258MKIIs V7 control unit with power and USB cords, never
used, new $290 sell $160 including shipping to CONUS

 

(5) Remote Rig RRC-1258MKIIs Wi-Fi interface board and rubber ducky antenna,
new in box, never used, new $100 sell $50 including shipping to CONUS

 

(6) Remote Rig RRC-1258MKIIs V7 radio unit, never used new $285, Sell $115
including shipping to CONUS

 

(7) Remote Rig Web Switch 1216H, new in box, never used. NEW $200 sell $99
including shipping to CONUS

 

 

73 John N5CQ

n...@arrl.net  

 

 

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[Elecraft] Alpha Antenna/KX3.

[Gene Moore via Elecraft]

I have just submitted my order for my KX3. As part of the next step, I am 
continuing my search for an antenna. At this point, I am leaning towards an 
Alpha Antenna mag loop. Like some, I have HOA restrictions in my first and 
second home and this somewhat limits me as to what I can put up. I have space 
on my back deck as well as a terrace in my condo.

Can anyone provide feedback regarding an Alpha Antenna or possibly have any 
additional suggestions that might be helpful.

Thanks 

Gene Moore, NC1L 

Sent from my iPhone
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Re: [Elecraft] K4 Production Prognosis

[Doug Renwick]

Yes, but I might die before it ships.

Doug

"The difference between stupidity and genius is that genius has its limits."
Albert Einstein 

-Original Message-


 No one will die if it ships late.  Period.

flame away.. Mike


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Re: [Elecraft] K4 Production Prognosis

[Michael Walker]

Having worked a very long and hard career in the Hardware, Software and the
Solution/Appliance department, the short story is that it will be shipped
when it is ready and not before.  The dates are a soft target.  Always.
This isn't the latest Apple iPhone.  it is a highly complicated device
built in small numbers (again, based on something like an iPhone).
 Companies like Elecraft and others do this because they love the
technology and giving back.  I guarantee that no one is getting rich on
it.  if so, the Elecraft Lear Jet would be parked in Dayton in May.

Pushing something out the door early can cause supportability issues and
that causes increased costs for the actual product and that means the
customer pays more.  And, we all know how cheap hams are.

No one works for free and this is a hobby.  Everyone has a life to live and
other higher priorities.

 No one will die if it ships late.  Period.

flame away.. Mike



On Tue, Jun 4, 2019 at 6:57 AM rich hurd WC3T  wrote:

> I’m amazed at the amount of detail some list members expect from Elecraft
> for their new products. Good Lord.  This isn’t a lifesaving piece of
> hardware, it’s a radio.
>
> To all the Veruca Salts on the list, I say “Relax.”
>
>
>
> On Mon, Jun 3, 2019 at 21:36 Richards  wrote:
>
> >
> > What K4 features and capabilities remain under development, and what
> > features are already developed and cast in stone?
> >
> > Will all features and specifications described in the product brochure
> > be viable and fully functional on the first production units?
> >
> > How long will buyers wait to buy one, if they do not buy in early and
> > advance a capital development loan?
> >
> > Will all three models be available in the first production run?
> >
> > Will all pre-orders ship in the first production run?   If not, how long
> > until the second run?
> >
> > How definite is the promised Late Nov/ Early December 2019 release data?
> >
> > K8JHR
> > 
> >
> >
> > __
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> >
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>
> --
> 72,
> Rich Hurd / WC3T / DMR: 3142737
> Northampton County RACES, EPA-ARRL Public Information Officer for Scouting
> Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
> *FN20is*
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Re: [Elecraft] portable antennas and rigs going through airport security

[Michael Walker]

In other trips, I have carried a camera backpack that far exceeds those
widths, even on CRJ's in the Caribbean.  There was no way I was checking a
camera back worth a lot of money and far more fragile than my Amateur
equipment.

You will have to be nice and work with the people at check in.   I find
them very accommodating.

Mike va3mw


On Tue, Jun 4, 2019 at 7:12 AM  wrote:

> That is a nice way to carry two radios if you don't mind lugging the
> weight on your shoulder though various airports or being able to carry
> much else. Be careful however as most U.S. airlines have a maximum 9"
> width on check-in bags.  I put a singe K3S in a Rose bag inside a
> Samsonite carry-on along with peripherals and even a few clothes.
>
> John KK9A aka P40A, WP2AA, PJ4R etc
>
>
> Jim Brown K9YC wrote:
>
>
> More than a few contesters drag radio gear several times a year to
> island stations in the Caribbean. One of my neighbors, W0YK has long
> carried on a pair of K3s in Rose's cases to P49, where he regularly wins
> RTTY contests. He had Rose put velcro on one surface of each so that
> they "clamped" together to be one piece of luggage, then pulled them
> apart to stow them in the overhead.
>
> 73, Jim K9YC
>
>
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Re: [Elecraft] portable antennas and rigs going through airport security

[john]

That is a nice way to carry two radios if you don't mind lugging the  
weight on your shoulder though various airports or being able to carry  
much else. Be careful however as most U.S. airlines have a maximum 9"  
width on check-in bags.  I put a singe K3S in a Rose bag inside a  
Samsonite carry-on along with peripherals and even a few clothes.


John KK9A aka P40A, WP2AA, PJ4R etc


Jim Brown K9YC wrote:


More than a few contesters drag radio gear several times a year to
island stations in the Caribbean. One of my neighbors, W0YK has long
carried on a pair of K3s in Rose's cases to P49, where he regularly wins
RTTY contests. He had Rose put velcro on one surface of each so that
they "clamped" together to be one piece of luggage, then pulled them
apart to stow them in the overhead.

73, Jim K9YC


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Re: [Elecraft] K4 Production Prognosis

[rich hurd WC3T]

I’m amazed at the amount of detail some list members expect from Elecraft
for their new products. Good Lord.  This isn’t a lifesaving piece of
hardware, it’s a radio.

To all the Veruca Salts on the list, I say “Relax.”



On Mon, Jun 3, 2019 at 21:36 Richards  wrote:

>
> What K4 features and capabilities remain under development, and what
> features are already developed and cast in stone?
>
> Will all features and specifications described in the product brochure
> be viable and fully functional on the first production units?
>
> How long will buyers wait to buy one, if they do not buy in early and
> advance a capital development loan?
>
> Will all three models be available in the first production run?
>
> Will all pre-orders ship in the first production run?   If not, how long
> until the second run?
>
> How definite is the promised Late Nov/ Early December 2019 release data?
>
> K8JHR
> 
>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
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-- 
72,
Rich Hurd / WC3T / DMR: 3142737
Northampton County RACES, EPA-ARRL Public Information Officer for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*
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Re: [Elecraft] K4 and Linux Infrastructure

[Dave B via Elecraft]

Hi.

The problem these days, is not only if something is exposed to the www,
but even if it can only be "seen" by other nodes on the same LAN.   Such
as the main shack PC, that probably can reach out to the WWW.  Once
"something" gets into that PC (or your IoT lightbulbs!)  It can at it's
leisure scan your shack (and/or home) LAN, looking for other
nodes/devices to poke at later, after "phoning home" with the details of
what it found.

You all have got your dumb IoT devices (including TV's and PVR's) on a
segregated VLAN haven't you?  No!  You have work to do then!

Also, irrespective of the OS used, one way to reduce the chance of user
induced mayhem, is to boot from a (protected) read only medium, copy the
OS to RAM (for speed) and use another SD card as persistent storage,
with an option during the initial boot (if for example) some combination
of keys are held down, to load the default settings into the "user"
area, as an easy "Factory Reset" feature.

Then, whatever the user does, when (not if) they muck it up, there is an
easy get out of jail free card.

As to the network security issue, the only "secure" network device, is
disconnected, powered off and in a sealed & screened box!  Period.  What
may be regarded as secure "now", in six weeks time could be hacked to
hell and back by script kiddies all over the world.  In truth,
currently, the bad types have the upper hand.

Sadly (as with any OS) a continual surveillance of the ecostructure is
needed, and the inevitable updates.  There are many ways to do that of
course, some easier, and some more "secure" than others.  Security and
convenience are mutually exclusive, sadly.  (In the case of a RO boot
medium, a switch would need to be flipped to allow a (once verified)
image to be flashed onto it, one time, said switch auto resetting once
programmed.)  Or another card shipped in by post, and that's not as
secure as you might think either!

Regarding legitimate use of a LAN/WAN connection.  One would hope(?)
that at the bare minimum:-

The radio control firmware is not run as root.

Incoming ssh requests are ignored/blocked.

In the case ssh connections are allowed, root login by ssh is blocked,
and only pre authorised (by certificate) user(s) are allowed in
(Elecraft themselves for example.)

The use of su and sudo are blocked if anyone does get to a command line
as "a user".  Also browsing the OS software/settings folders is blocked,
should the firmware die, leaving the user at a command line.

Have the radio "reach out" to Elecraft central when needed using OpenVPN
(for example, using the current state of the art security model) to
check for updates (user initiated) or for Elecraft to remote admin,
after telling the user how to initiate that feature..

Any such automatic updates are "staged" within the rig, until they can
be verified as complete, uncorrupted and genuine, before being applied.

Any custom daemon software intended for legitimate remote
control/interface use, should be written in such a way, that any corrupt
or unknown commands (and/or parameters) are ignored, not even returning
any error code to the initiator.  Greatly reducing the ability of it to
be "fuzzed" for vulnerabilities.

Also, . 

Similarly, any code created to allow the radio to control accessories
via the LAN port (PA's ATU's etc) should be created with security in
mind.  Such command & communication links should be encrypted, so only
the intended endpoints can see/use the data.  ESPECIALLY, in the case
that such links traverse the public internet...  (A licence requirement
here in the UK by the way!)

Any built in Digimode software (PSK, RTTY, CW, JT modes etc) should also
be run in a VM, within the radio.  Hopefully preventing any possible
remote takeover issues via that route!  (None that I know of at this
time, but ...)

~ ~ ~

Trouble with all the above it, it takes */a lot of time and effort/* by
the equipment makers to do, and do right, plus the testing of it all, or
contracting in some qualified penetration-testing types to test it all
for you.  And that cost money.   That, and capable hardware to do all
that, is also not exactly low cost (but is getting lower in cost.)

Also, all the above is not unique to Linux, */all OS's/* have their
issues, just that some are better(or worse) than others.

Effective Security is difficult to make user proof.  Educate the users
first.  If nothing else, listen to the "Security Now" podcasts by your
countrymen.  https://twit.tv/sn  (Another episode later today.) 
Entertaining, and you might get an appreciation of just how much mayhem
is going on out there right now.

Happy Days!

Dave B G0WBX.

(I have learnt much of the above the hard way, by digging friends and
family, and some work colleagues, out of the mire induced by a lack of
knowledge of how to stay safe on-line, and from the Security Now podcasts.)


-- 
Created on and sent from a Unix like PC running and using free and open source 
software: