[Elecraft] Elecraft CW Net Announcement

[kevinr]

Good evening,

   A chilly, rainy week is causing the fir and hemlock to expose new 
growth.  More shades of green than you can imagine.  The deer are taking 
advantage of it.  Lots of elk sign too.  Many new birds but most of them 
are passing through on their way north.  A red shafted flicker decided 
my house was a good sounding board.  Then he found an antenna mast to 
beat on.  What a way to wake up.


   Conditions should be a bit less noisy than last week but no 
stronger.  The expected CMEs took a detour.


I wonder if Elecraft is going to skip the K9 designation?  KX12 has a 
ring to it.  Hmmm...



Please join us on:

14050 kHz at 2200z Sunday (3 PM PDT Sunday)
 7047 kHz at z Monday (5 PM PDT Sunday)

73,
Kevin. KD5ONS




She's so cold and human
It's something humans do
She stays so golden solo,
she's so number nine

where did she learn how to surf?

_


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Re: [Elecraft] K4 Observations

[Grant Youngman]

I think your observations are spot on in most respects.

While the basic K4 is certainly going to be a great radio, it will likely NOT 
have the strong signal handling characteristics of the K3/K3S.  There will 
still be the likelihood of A/D clipping suffered by virtually all 16-bit SDRs 
in a high-density RF environment.  And although there is a second receiver it 
appears to be more like a Flex “slice” .. sharing front end filters with the 
main receiver.  In that regard, the K4D will be a great advantage for dual 
receivers in general,  or for diversity.

So by the time you get to the K4HD, you will spend a (I would guess) quite a 
bit more than a K3S for (perhaps improved by a few dB here and there) strong 
signal performance in the the most demanding conditions.

Lot of tradeoffs to be considered … for sure.

I have far more than the current list price in my existing K3 .. I’ve purchased 
several new boards for it over the years as various K3 upgrades and the K3S 
upgrades came out.  So the value it has is as a radio, and not a retirement 
plan.

One way or the other, I’ve set up a K4 piggy bank, in anticipation of the kit 
version next year … but have no plans at all to part with my K3.  It’s too good 
a radio :-)

Grant NQ5T
K3 #2091 KX3 #8342

> On May 18, 2019, at 11:09 PM, Buck  wrote:
> 
> The following is offered based on my observations and discussions at the 
> Elecraft booth.  I am *not* an official, or even unofficial, Elecraft 
> spokesman and stand willing to be corrected.
> 
> First, this is going to be another game-changer from Elecraft.  The radio 
> will have outstanding performance figures and an interface to die for.  The 
> screen is beautiful and functions can be controlled from either buttons or 
> the touch-screen.  There is band-stacking on the touch screen, a nit people 
> have complained about on the K3.
> 
> The radio is full SDR as opposed to the analog front end of the K3. However 
> an option, the K4HD, is a superhet receive function.  Like previous Elecraft 
> radios, this can be added later if you think you need it.  Preliminary is 
> that it will not be necessary unless you operate in the presence of strong 
> stations (multi-multi).
> 
> Another option has a second set of band pass filters and ADC module that will 
> allow the two receivers to operate on different bands or antennas (K4D).
> 
> The radio contains a Linux computer so all this magic does not require an 
> external computer except for logging or audio input. The rig will be 
> addressable locally or over the internet with no additional software.  I saw 
> it operated from an iPad and Android is coming.  The iPad screen looked 
> exactly like the front panel, including the panadapter.
> 
> There are multiple USB ports, an Ethernet port, RS232 and an HDMI port so you 
> can project the front panel, or parts of it, to an external monitor.  The 
> panadapter looks awesome on the external monitor and you will be able to 
> point and click to QSY the radio.
> 
> The prices are targets but I got the impression the final will be very close. 
>  The cost is less than a fully loaded K3s. The kit version will be cheaper 
> than factory-assembled and ship several months later to allow time to write 
> the assembly manual.  Target for the factory version is November.
> 
> I suspect the K4 will replace the K3 series as K3s sales are sure to suffer 
> because of product age and competition from the K4.  I did not hear any talk 
> about sun-setting the K3s when the K4 comes out.  I am sure there are many 
> people who will want to buy the basic K3s and upgrade over time (or not) 
> rather than plunk down $4,000 for the K4.
> 
> What does this do to the value of a K3 or K3s?  I expect there will be some 
> coming on the market.  Anyone who buys, or retains, a K3 or K3s will still 
> have one of the finest radios ever made.  We are at the point where the 
> difference among the top 5 or so on Sherwood's charts is a decibel or two, 
> almost within the margin of error and certainly beyond the ability of the 
> human ear to discern.  So, don't panic.  The demand for the K3 series will be 
> strong for many years to come.
> 
> Keep an eye on the website as more information comes from Watsonville.
> 
> 
> -- 
> Buck, k4ia
> Honor Roll
> 8BDXCC
> EasyWayHamBooks.com
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[Elecraft] K4 Observations

[Buck]

The following is offered based on my observations and discussions at the 
Elecraft booth.  I am *not* an official, or even unofficial, Elecraft 
spokesman and stand willing to be corrected.


First, this is going to be another game-changer from Elecraft.  The 
radio will have outstanding performance figures and an interface to die 
for.  The screen is beautiful and functions can be controlled from 
either buttons or the touch-screen.  There is band-stacking on the touch 
screen, a nit people have complained about on the K3.


The radio is full SDR as opposed to the analog front end of the K3. 
However an option, the K4HD, is a superhet receive function.  Like 
previous Elecraft radios, this can be added later if you think you need 
it.  Preliminary is that it will not be necessary unless you operate in 
the presence of strong stations (multi-multi).


Another option has a second set of band pass filters and ADC module that 
will allow the two receivers to operate on different bands or antennas 
(K4D).


The radio contains a Linux computer so all this magic does not require 
an external computer except for logging or audio input. The rig will be 
addressable locally or over the internet with no additional software.  I 
saw it operated from an iPad and Android is coming.  The iPad screen 
looked exactly like the front panel, including the panadapter.


There are multiple USB ports, an Ethernet port, RS232 and an HDMI port 
so you can project the front panel, or parts of it, to an external 
monitor.  The panadapter looks awesome on the external monitor and you 
will be able to point and click to QSY the radio.


The prices are targets but I got the impression the final will be very 
close.  The cost is less than a fully loaded K3s. The kit version will 
be cheaper than factory-assembled and ship several months later to allow 
time to write the assembly manual.  Target for the factory version is 
November.


I suspect the K4 will replace the K3 series as K3s sales are sure to 
suffer because of product age and competition from the K4.  I did not 
hear any talk about sun-setting the K3s when the K4 comes out.  I am 
sure there are many people who will want to buy the basic K3s and 
upgrade over time (or not) rather than plunk down $4,000 for the K4.


What does this do to the value of a K3 or K3s?  I expect there will be 
some coming on the market.  Anyone who buys, or retains, a K3 or K3s 
will still have one of the finest radios ever made.  We are at the point 
where the difference among the top 5 or so on Sherwood's charts is a 
decibel or two, almost within the margin of error and certainly beyond 
the ability of the human ear to discern.  So, don't panic.  The demand 
for the K3 series will be strong for many years to come.


Keep an eye on the website as more information comes from Watsonville.


--
Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com
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Re: [Elecraft] KPA1500 AC Mains wire colours

[K9MA]

Some equipment in NA is wired with both phases plus neutral, so that 120 
V is available. Electric clothes driers and stoves, for example, which 
have light bulbs and sometimes 120 V outlets. (You can imagine what 
would have happened if 240 V bulbs had been required here.) However, at 
one time the code did not require separate neutral and ground wires, so 
the ground was used as the 120 V return. If the ground opens up, your 
whole stove is suddenly at 120 V. Unfortunately, some of those are still 
around, and seem to be sort of grandfathered, or just ignored.


Hopefully, there's no ham equipment wired that way!

73,
Scott K9MA



On 5/18/2019 19:16, Jim Brown wrote:

On 5/18/2019 4:28 PM, Clay Autery wrote:
230VAC on 3 wires?  Never knew they did 3 wire 220V  I always 
assumed it was still 2 hots and ground (plus an optional neutral).


Two hots (phases) and ground is three wires. Single-phase power 
normally comes into a building in North America as two phases and a 
neutral. We connect a 240V load between the two phases, and a 120V 
load between one phase and a neutral. It's not unusual to feed a 
sub-panel with both phases, neutral, and ground so that the panel can 
feed both 120V and 240V loads. The key here is that loads must NEVER 
be connected between a phase and ground, ALWAYS between phases or 
between phase and neutral.


You probably know that EU runs on 230/240V, wired phase, neutral, and 
ground.


73, Jim K9YC

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--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] KPA1500 AC Mains wire colours

[Peter Hall]

You’re welcome, Doug.  I’m glad you have the KPA1500 up and running.

Your note, and my recollection of installing my own KPA1500, identify an 
important omission in the KPA1500 manual.  Some other shortcomings of the 
manual (such as a decent working block diagram) are merely irritating but not 
including the proper mains connection for a $5000  device shipped 
internationally is a serious oversight.  It’s clear there is not a widespread 
appreciation of global power standards in this email group (for example) and, 
rather than having a future user stumble across incorrect or incomplete 
information, the Elecraft manual needs to have the definitive instructions 
up-front.

I’m not sure how the EU regulations are constructed but I suspect that it’s 
technically illegal to use the supplied cable in Australia.  For Australian 
users a more immediate consideration on opening the box is that the US cable 
won’t fit through a standard Australian mains plug cover.  You can buy one 
Clipsal brand plug from a specialised electrical wholesaler which will work, or 
you can use a heavy duty plug and socket if available.

73, Peter.



From: turnbull 
Sent: Saturday, 18 May 2019 10:14 PM
To: Peter Hall ; Ken Winterling 
Cc: Elecraft Reflector 
Subject: RE: [Elecraft] KPA1500 AC Mains wire colours

TU Peter, the amp is up and running.   73 Doug EI2CN



Sent from my Samsung Galaxy smartphone.

 Original message 
From: Peter Hall mailto:p.h...@curtin.edu.au>>
Date: 18/05/2019 11:55 (GMT+00:00)
To: Ken Winterling mailto:wa2...@gmail.com>>, Doug Turnbull 
mailto:turnb...@net1.ie>>
Cc: Elecraft Reflector 
mailto:elecraft@mailman.qth.net>>
Subject: RE: [Elecraft] KPA1500 AC Mains wire colours

Ken, Doug

Ken is correct.  Your amplifier comes with a US colour coded cable and, for 
your 230V supply, black is active, white is neutral and green is earth.

I had some additional searching to find an Australian heavy duty plug that 
would fit the supplied mains cable and a standard 240V outlet, but was in the 
end successful.

Regards,
Peter, VK6HP



-Original Message-
From: elecraft-boun...@mailman.qth.net 
mailto:elecraft-boun...@mailman.qth.net>> On 
Behalf Of Ken Winterling
Sent: Saturday, 18 May 2019 6:24 PM
To: Doug Turnbull mailto:turnb...@net1.ie>>
Cc: Elecraft Reflector 
mailto:elecraft@mailman.qth.net>>
Subject: Re: [Elecraft] KPA1500 AC Mains wire colours

Doug,I don't have a KPA1500 but these are the standard power cord wire colors 
and functions:

*Function   USA  Europe*
Neutral   WhiteBlue
Hot Black Brown
Ground   Green   Green/Yellow stripe

If there is any doubt you can send an email to Elecraft; they are very 
responsive and helpful.

Ken
WA2LBI


On Sat, May 18, 2019 at 5:36 AM Doug Turnbull 
mailto:turnb...@net1.ie>> wrote:

> Dear OMs or YLs,
>  I have a new KPA1500 for use in Europe.  Mine came from Elecraft
> direct and thus has a US style mains plug and I assume US colour coded
> AC power
> lead.What are the USA colours for Live, Neutral and Ground?
>
> The manual does not supply a schematic and I do not want to open the amp at
> this time.   I can look on line for this information but am asking as
> regards the KPA1500 so as to be certain.
>
> Thank you.
>
>  73 Doug EI2CN
>
>
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Re: [Elecraft] KPA1500 AC Mains wire colours

[Jim Brown]

On 5/18/2019 4:28 PM, Clay Autery wrote:
230VAC on 3 wires?  Never knew they did 3 wire 220V  I always 
assumed it was still 2 hots and ground (plus an optional neutral).


Two hots (phases) and ground is three wires. Single-phase power normally 
comes into a building in North America as two phases and a neutral. We 
connect a 240V load between the two phases, and a 120V load between one 
phase and a neutral. It's not unusual to feed a sub-panel with both 
phases, neutral, and ground so that the panel can feed both 120V and 
240V loads. The key here is that loads must NEVER be connected between a 
phase and ground, ALWAYS between phases or between phase and neutral.


You probably know that EU runs on 230/240V, wired phase, neutral, and 
ground.


73, Jim K9YC

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Re: [Elecraft] K4 and Predistortion

[Jim Brown]

On 5/18/2019 4:01 PM, Phil Kane wrote:

Those
of us with engineering backgrounds knew that what I was referring to as
"pre-distortion" was the pre-emphasis / de-emphasis curves commonly used
in FM broadcast audio chains.


All of which emphasizes the need for using the right words to describe 
things. The word "distortion" is most commonly used to describe 
non-linearity, not frequency response. And, BTW, that 
pre-emphasis/de-emphasis is a Standard, not just "commonly used." You 
know the Regs far better than I, but I suspect it's there too.


As I'm sure you know, it was also common practice to go FAR beyond that, 
with multi-band dynamics processing and the tricky stuff that Bob Orban 
was doing. The engineering "rule of thumb" was that if you could see the 
modulation monitor needle move, you weren't doing enough.:)


I did some research on the Orban FM processor, which I published as an 
AES Paper in 1986. http://k9yc.com/AESPaper-TDS.pdf


73, Jim K9YC



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Re: [Elecraft] KPA1500 AC Mains wire colours

[Clay Autery]

230VAC on 3 wires?  Never knew they did 3 wire 220V  I always 
assumed it was still 2 hots and ground (plus an optional neutral).


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(318) 518-1389

On 18-May-19 05:55, Peter Hall wrote:

Ken, Doug

Ken is correct.  Your amplifier comes with a US colour coded cable and, for 
your 230V supply, black is active, white is neutral and green is earth.

I had some additional searching to find an Australian heavy duty plug that 
would fit the supplied mains cable and a standard 240V outlet, but was in the 
end successful.

Regards,
Peter, VK6HP



-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Ken Winterling
Sent: Saturday, 18 May 2019 6:24 PM
To: Doug Turnbull 
Cc: Elecraft Reflector 
Subject: Re: [Elecraft] KPA1500 AC Mains wire colours

Doug,I don't have a KPA1500 but these are the standard power cord wire colors 
and functions:

*Function   USA  Europe*
Neutral   WhiteBlue
Hot Black Brown
Ground   Green   Green/Yellow stripe

If there is any doubt you can send an email to Elecraft; they are very 
responsive and helpful.

Ken
WA2LBI


On Sat, May 18, 2019 at 5:36 AM Doug Turnbull  wrote:


Dear OMs or YLs,
  I have a new KPA1500 for use in Europe.  Mine came from Elecraft
direct and thus has a US style mains plug and I assume US colour coded
AC power
lead.What are the USA colours for Live, Neutral and Ground?

The manual does not supply a schematic and I do not want to open the amp at
this time.   I can look on line for this information but am asking as
regards the KPA1500 so as to be certain.

Thank you.

  73 Doug EI2CN



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Re: [Elecraft] K4 and Predistortion

[Phil Kane]

On 5/18/2019 9:42 AM, Bob McGraw K4TAX wrote:

> Tongue and cheek, .from what I hear on the bands, pre-distortion
> starts with mostly that which comes out of the operators mouth. 
> Electronics won't improve this artifact.

For sure!  Same with current music.  No extra charge for the distorted
sound.

Reminds me of a case some 45 years ago involving broadcast signal
quality where I was testifying as the FCC's engineering expert.  Those
of us with engineering backgrounds knew that what I was referring to as
"pre-distortion" was the pre-emphasis / de-emphasis curves commonly used
in FM broadcast audio chains.  The non-engineer lawyers jumped up and
down "what, they are intentionally distorting the station's sound?"
Took a while to educate them from the witness box.

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Re: [Elecraft] Elecraft K4?

[Nr4c]

Look at full discount 1st delivery deposit figure. 

Sent from my iPhone
...nr4c. bill


> On May 16, 2019, at 2:13 PM, Phil Hystad via Elecraft 
>  wrote:
> 
> I did not see a price on the Elecraft site, just the deposit amounts.  Does 
> anyone know the price or a ball park figure?
> 
> phil, K7PEH
> 
> 
>> On May 16, 2019, at 11:11 AM, Peter Pauly  wrote:
>> 
>> I just made a deposit. I have a feeling things will be a bit slower at the
>> Flex booth this year in Xenia.
>> 
>>> On Thu, May 16, 2019 at 5:57 PM Frank Krozel  wrote:
>>> 
>>> It IS on the Elecraft site
>>> 
>>> https://elecraft.com/products/k4-transceiver?fbclid=IwAR1ZvSRipjGHXFT4CeD5iYhFDj89Oa7ZYJ-1rV5u83e9UYHFdg9TDsceMbE
>>> Frank KG9H
>>> 
>>> 
 On May 16, 2019, at 12:54 PM, David Box  wrote:
 
 I googled Lutz electronics and did a translate of their web site.  If
>>> this is a hoax there has been a lot of work put into it.  Guess we need to
>>> standby for Dayton.
 
 <
>>> https://translate.google.com/translate?hl=en=auto=en=https%3A%2F%2Fwww.lutz-electronics.ch%2Fstationaer%2Famateurfunkgeraete%2Felecraft-k4%2F
 
 
 de Dave K5MWR
 
> On 5/16/2019 11:51 AM, rboutell wrote:
> Just going to leave this here:
> https://www.lutz-electronics.ch/pdf/K4_Brochure-print_Lutz.pdf
> Russ, W9RB
> 
> 
> 
> -
> 73, Russ - W9RB
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
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[Elecraft] Fw: Re: SP3 vs SP4 speakers

[Brian H Toubman]

Please do :)


Wayne



elecraft.com

On May 17, 2019, at 1:05 PM, Brian H Toubman  wrote:


Hi Wayne,

I can't think of any reason not to, except for real estate for future
options/accessories.
Icom used to have an option for power supply installed. Made hookup 
real easy. Was not sure if you wanted me to put this on the net. 

Brian
K1DIH


On Thu, 16 May 2019 22:31:16 -0400 Wayne Burdick 
writes:

Also: I�m hoping to save desktop space by putting a 25-amp, 14 VDC 

power supply in mine. Anyone else interested in this possibility? 

Other suggestions?



Wayne 

N6KR





elecraft.com



On May 16, 2019, at 10:15 PM, Lyle Johnson  

wrote:



Case size.  The K4 is the same size as the KPA1500, which is 

slightly larger than the K3.  So the SP4 height and depth match the 

K4, like the SP3 does the K3.



73,



Lyle KK7P



On 5/16/19 5:32 PM, Christopher Hoover wrote:

What's different between the SP3 and the SP4 besides the 

silkscreen ?

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Re: [Elecraft] DAYTON DISCOUNT?

[Nr4c]

Often free shipping. 

Sent from my iPhone
...nr4c. bill


> On May 18, 2019, at 11:55 AM, Jorge Diez - CX6VM  
> wrote:
> 
> Hello
> 
> is there any Dayton discount to buy K3, P3, K3/0, cables, powe supply, etc,
> etc?
> 
> -- 
> 73,
> Jorge
> CX6VM/CW5W
> 
> 
> Libre
> de virus. www.avast.com
> 
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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[Elecraft] Retirement K4 Burning Desire

[Richards]

   Someone said: "Now, i am flummoxed with a burning fascination as
   to how i can obtain one ofthese K4 Dream Machines."



Um...ahem ...why not...um... get an EASY, part time job and...er...earn 
extra money for a new rig, fresh coax cable, and a few more bucks to buy 
better bourbon to sip while relaxing after that next big contest?


I know a guy who worked at a big box store to pay for health insurance 
and other goodies, and really respect him for it. I occasionally assume 
an odd professional assignment to finance new gear.


You might also sell stuff you do not really need around the house, 
instead of leaving it to your heirs to sort out after you are reassigned 
to a station in the clouds? You would be surprised how much green you 
can recover. I sold enough junk last year to finance a new guitar. My 
wife fully supports any purchase I make with new money outside the 
investment pool. A new transceiver may be within reach after all - plus 
you will have that heady sense of self satisfaction the comes from a job 
well done without dipping into your financial reserves.


Work only as much as necessary - I am certainly NOT advocating against 
retirement! Besides, you may enjoy getting out of the house and mixing 
with people, and the extra cash should be fun to spend.


That is just MY take, anyway ... your mileage may vary.

K8JHR
--


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Re: [Elecraft] K4, Spouse, Retirement, Burning Fascination

[Mike - W5JR]

You guys need a button class to get more out of your radios

K-Line and others(including Signal One’s) 

tnx
Mike / W5JR
Alpharetta GA


> On May 17, 2019, at 10:48 PM, kevinr  wrote:
> 
> Just walked into the radio room for a quick button inventory.
> 
> Power, Band, ATU Tune, A/B, and Spot get used.
> 
> The rest are just place holders
> 
>73,
> 
>   Kevin.  KD5ONS
> 
> -
> 
> 
>> On 5/17/19 7:20 PM, Fred Jensen wrote:
>> INT QKH:  "How many knobs does your radio have?"
>> QKH12: "My radio has twelve knobs"
>> 
>> INT QKU: "How many of those do you know how to use?"
>> QKU4: "I know how to use four of them"
>> 
>> INT QKN: "How many do you need to operate?"
>> QKN1: "I need the Big One to operate"
>> 
>> 73,
>> Fred ["Skip"] K6DGW
>> Sparks NV DM09dn
>> Washoe County
>> 
>>> On 5/17/2019 7:14 PM, Dennis Moore wrote:
>>> One of the first things I did was count the buttons. About equal to the K3, 
>>> therefore I don't need one :-)
>>> 
>>> 73, Dennis NJ6G
>>> 
>> 
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Re: [Elecraft] Quandary - Anyone Seriously Considering the Alternativeto the K4?

[Jim Brown]

On 5/18/2019 1:42 PM, Doug Turnbull wrote:

Kev, Possibly this is true for Flex as well but one point that I appreciate
about Elecraft is that the chief design engineers are actively involved in
the forum when needed.


AND on the air. I worked Wayne when we were operating as N7N from NV 
during the 7th area QSO party and he answered my CQ.


It took a LONG time for Flex radios to be even slightly user-friendly, 
simply because the designers weren't operators. Their products started 
taking off when they started listening to top contesters who were 
beating them up about their terrible user interface.


73, Jim K9YC

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Re: [Elecraft] Quandary - Anyone Seriously Considering the Alternativeto the K4?

[Doug Turnbull]

Kev, Possibly this is true for Flex as well but one point that I appreciate
about Elecraft is that the chief design engineers are actively involved in
the forum when needed.  
 

 73 Doug EI2CN

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kevin, N4TT
Sent: 17 May 2019 15:45
To: Elecraft Reflector Reflector
Subject: [Elecraft] Quandary - Anyone Seriously Considering the
Alternativeto the K4?

Hi:

I plan to drop my use of Flex radios this year. Until yesterday, I had the
new FTdx-101 and a K3S in mind but I'm not in a big rush and was hoping the
rumors of a K4 would turn out to be true. Have to admit, I'm surprised by
how fast it was announced.

So I'm wondering what other people might be thinking about what seems to be
two or three great options (Ftdx, K3S, K4). We can do this by direct mail
if you like as I don't want to turn this into something it isn't meant to
be. I'm just looking for other hams that might be thinking on the same
options and maybe want to bounce some ideas around.

My goal is a purchase by March 2020 but by the end of the year if I can
pull it off. I'll have a 6500, 6700 and Maestro to offset the costs. I have
a KX3 I'll be keeping for days in the fresh air.

73,
Kev N4TT
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Re: [Elecraft] SP4

[Grant Youngman]

Since it would likely be a switcher to fit in the space — it is a great idea as 
long as it’s absolutely, positively, DEAD QUIET.

I live in a townhome, and am forced by geography to have antennas which aren’t 
200' out in the back 40 (since I no longer have a back 40) on sky needles 
(which are DOA by default).  Switchers of all ilks have been a problem even 
when weighed down by multiple toroids everywhere.   I finally gave up and 
recently went back to a linear supply. And yes, it’s about the same size as the 
radio … but it IS quiet :-)

Grant NQ5T
K3 #2091 KX3 #8342

> On May 18, 2019, at 3:18 PM, Dauer, Edward  wrote:
> 
> Just before the weekend and its major news, I think it was Eric or maybe it 
> was Wayne, or maybe someone else, asked if there was any interest in having 
> an SP4 with a 13 VDC supply inside.  If the supply were sufficient to run the 
> transceiver and have an amp or two left over for other accessories, then yes, 
> it would definitely interest me.
> 

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Re: [Elecraft] KPA1500 AC Mains wire colours

[Jim Brown]

On 5/18/2019 2:35 AM, Doug Turnbull wrote:

The manual does not supply a schematic and I do not want to open the amp at
this time.


An ohmmeter will quickly provide at least part of the answer. Ground 
should go to the chassis, phase and neutral should not, but should show 
continuity between them because they feed the power transformer.


73, Jim K9YC

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[Elecraft] SP4

[Dauer, Edward]

Just before the weekend and its major news, I think it was Eric or maybe it was 
Wayne, or maybe someone else, asked if there was any interest in having an SP4 
with a 13 VDC supply inside.  If the supply were sufficient to run the 
transceiver and have an amp or two left over for other accessories, then yes, 
it would definitely interest me.

Ted, KN1CBR

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[Elecraft] FW: K4 and Predistortion

[Roger]

-Original Message-
From: Roger [mailto:ro...@mulzer.de] 
Sent: Saturday, May 18, 2019 8:56 PM
To: 'ab2tc'
Subject: RE: [Elecraft] K4 and Predistortion

Hi Knut,

thanks for the info. I will check it out. Predistortion sure would place the K4 
ahead of the majority of the manufacturers (at least the big ones). The tools 
and the possibilities are available for many years and have been for much 
longer in the professional sector. However I understand that most of the people 
don´t care about predistortion - maybe because they don´t really understand the 
benefit. It probably is a longer process like back in the 70s when car owners 
were afraid that emission cleaning causes engine problems and low power output. 
Actually it is funny that we are talking about unwanted emissions and power 
output here and there(don´t 
pull my leg - although being German I DON´T appreciate the VW emission case at 
all!)

73 Roger, DL5RBW

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ab2tc
Sent: Saturday, May 18, 2019 7:36 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K4 and Predistortion

Hi Roger,

You wrote "With the radios receiverwise reaching the physical limits it now is 
time to pull up the transmitter side to the state of the art as well. 
Regarding transmit IMD  we are still in the 70s or 80s and sometimes even worse 
than that therefore no progress has been made the last 40 to 50 years!"

I couldn't agree with you more ! BTW, there is now a new K4 group on groups.io, 
which is promising since the K3 group is now inundated with K4 stuff.

AB2TC - Knut



Roger-3 wrote
> As there is a lot of buzz going around with the announced K4 and I 
> have seen
> 1 or 2 messages on this reflector that referred to "Predistortion" I 
> wonder if there is any further detail on that. I probably fall out of 
> the regular scheme as I couldnt care less about the ability for remote 
> control and another 10 USB ports rather than predistortion. FLEX is 
> using the customer request for more remote control possibilities and 
> more USB ports to hold their 5 or 6 years ago announced predistortion 
> on standby - at least that is what they say. With the radios 
> receiverwise reaching the physical limits it now is time to pull up 
> the transmitter side to the state of the art as well.
> Regarding transmit IMD  we are still in the 70s or 80s and sometimes 
> even worse than that therefore no progress has been made the last 40 
> to 50 years!
> 
> So is there any deadline (vague or not) when predistortion will be 
> implemented?
> 
> 73s Roger, DL5RBW
> 
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[Elecraft] For sale K3S, loaded with loaded P3

[Roger Palmer]

If you are interested, please email me and I will email copy of my original 
invoice from Elecraft for this MINT K3S full options & setup. Includes 144mhz 
option.

Roger K7ERQ

Sent from  Roger Palmer i phone
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[Elecraft] Yet Another K4 Thread (YAK4T) (TM) - Sampling Rate, ENOB, FPGA? and Requests

[Mark Goldberg]

Way down in the specs you have the sampling rate, 122 MHz and I don't see a
spec for the A/D Equivalent Number Of Bits (ENOB). That is a useful measure
of the dynamic range, as most if not all 16 Bit A/Ds have a lower number of
ENOB. Perhaps these should be more prominently advertised as they can be
used to compare direct sampling SDRs in a more Apples to Apples fashion.

Do you use an FPGA as a Digital Down Converter? If so, prominently
advertise that too.

Having a high bandwidth I/Q output to USB or Ethernet, and a driver to the
standards used by multiple Panadapter and Spectrum Analysis software would
also be great.

Lastly, the ability to directly sync to a low phase noise 10 MHz reference
without frequency jumps would be very useful with said Spectrum Analyis
software to be able to use the K4 as a measuring tool. Maybe two modes,
sort of follow a crappy 10 MHz source and lock to one that has low enough
phase noise to match your radio's performance.

73,

Mark
W7MLG
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Re: [Elecraft] K4 and Predistortion

[ab2tc]

Hi Roger,

You wrote "With the radios receiverwise reaching the physical limits it 
now is time to pull up the transmitter side to the state of the art as well. 
Regarding transmit IMD  we are still in the 70s or 80s and sometimes even 
worse than that therefore no progress has been made the last 40 to 50
years!"

I couldn't agree with you more ! BTW, there is now a new K4 group on
groups.io, which is promising since the K3 group is now inundated with K4
stuff.

AB2TC - Knut



Roger-3 wrote
> As there is a lot of buzz going around with the announced K4 and I have
> seen
> 1 or 2 messages on this reflector that referred to "Predistortion" I
> wonder
> if there is any further detail on that. I probably fall out of the regular
> scheme as I couldn´t care less about the ability for remote control and
> another 10 USB ports rather than predistortion. FLEX is using the customer
> request for more remote control possibilities and more USB ports to hold
> their 5 or 6 years ago announced predistortion on standby - at least that
> is
> what they say. With the radios receiverwise reaching the physical limits
> it
> now is time to pull up the transmitter side to the state of the art as
> well.
> Regarding transmit IMD  we are still in the 70s or 80s and sometimes even
> worse than that therefore no progress has been made the last 40 to 50
> years!
> 
> So is there any deadline (vague or not) when predistortion will be
> implemented?
> 
> 73s Roger, DL5RBW
> 
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Re: [Elecraft] Transverter XV144 way off frequency

[Don Wilhelm]

Implementing that for the XV144 could supposedly be as easy as lifting 
the end of C15 which connects to Q1 and injecting the 116 MHz signal at 
the 'flying lead' of C15.


73,
Don W3FPR

On 5/18/2019 12:58 PM, Edward R Cole wrote:
Another aftermarket solution might be the new DIGILO PLL synth from DEMI 
for $99:

http://01895fa.netsolhost.com/PDF/DIGILO.PDF
It can use an internal TCXO or high stability 10-MHz ext reference.

Basically disable the current LO ckt and capacitively couple 116 MHz RF 
into the XV144 in place of xtal LO.


This unit replaces the A32 PLL which apparently is NLA.  I run them in 
my 432, 1296, 3400, and 10-GHz transverters.



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Re: [Elecraft] K4 and Predistortion

[Grant Youngman]

There is an input on the real panel for a “sample” from an RF amp.  No 
indication that I’ve seen yet on the purpose of this input.  

I suspect it may be a while before all is revealed .. :-)

Grant NQ5T
K3 #2091 KX3 #8342

> On May 18, 2019, at 12:42 PM, Bob McGraw K4TAX  wrote:
> 
> Tongue and cheek, .from what I hear on the bands, pre-distortion 
> starts with mostly that which comes out of the operators mouth.  Electronics 
> won't improve this artifact.
> 
> 73
> 
> Bob, K4TAX
> 
> 
> On 5/18/2019 11:35 AM, Roger wrote:
>> As there is a lot of buzz going around with the announced K4 and I have seen
>> 1 or 2 messages on this reflector that referred to "Predistortion" I wonder
>> if there is any further detail on that. I probably fall out of the regular
>> scheme as I couldn´t care less about the ability for remote control and
>> another 10 USB ports rather than predistortion. FLEX is using the customer
>> request for more remote control possibilities and more USB ports to hold
>> their 5 or 6 years ago announced predistortion on standby - at least that is
>> what they say. With the radios receiverwise reaching the physical limits it
>> now is time to pull up the transmitter side to the state of the art as well.
>> Regarding transmit IMD  we are still in the 70s or 80s and sometimes even
>> worse than that therefore no progress has been made the last 40 to 50 years!
>> 
>> So is there any deadline (vague or not) when predistortion will be
>> implemented?
>> 
>> 73s Roger, DL5RBW
>> 

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Re: [Elecraft] Transverter XV144 way off frequency

[Edward R Cole]

Another aftermarket solution might be the new DIGILO PLL synth from 
DEMI for $99:

http://01895fa.netsolhost.com/PDF/DIGILO.PDF
It can use an internal TCXO or high stability 10-MHz ext reference.

Basically disable the current LO ckt and capacitively couple 116 MHz 
RF into the XV144 in place of xtal LO.


This unit replaces the A32 PLL which apparently is NLA.  I run them 
in my 432, 1296, 3400, and 10-GHz transverters.


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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Re: [Elecraft] K4 and Predistortion

[Bob McGraw K4TAX]

Tongue and cheek, .from what I hear on the bands, pre-distortion 
starts with mostly that which comes out of the operators mouth.  
Electronics won't improve this artifact.


73

Bob, K4TAX


On 5/18/2019 11:35 AM, Roger wrote:

As there is a lot of buzz going around with the announced K4 and I have seen
1 or 2 messages on this reflector that referred to "Predistortion" I wonder
if there is any further detail on that. I probably fall out of the regular
scheme as I couldn´t care less about the ability for remote control and
another 10 USB ports rather than predistortion. FLEX is using the customer
request for more remote control possibilities and more USB ports to hold
their 5 or 6 years ago announced predistortion on standby - at least that is
what they say. With the radios receiverwise reaching the physical limits it
now is time to pull up the transmitter side to the state of the art as well.
Regarding transmit IMD  we are still in the 70s or 80s and sometimes even
worse than that therefore no progress has been made the last 40 to 50 years!

So is there any deadline (vague or not) when predistortion will be
implemented?

73s Roger, DL5RBW

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[Elecraft] K4 and Predistortion

[Roger]

As there is a lot of buzz going around with the announced K4 and I have seen
1 or 2 messages on this reflector that referred to "Predistortion" I wonder
if there is any further detail on that. I probably fall out of the regular
scheme as I couldn´t care less about the ability for remote control and
another 10 USB ports rather than predistortion. FLEX is using the customer
request for more remote control possibilities and more USB ports to hold
their 5 or 6 years ago announced predistortion on standby - at least that is
what they say. With the radios receiverwise reaching the physical limits it
now is time to pull up the transmitter side to the state of the art as well.
Regarding transmit IMD  we are still in the 70s or 80s and sometimes even
worse than that therefore no progress has been made the last 40 to 50 years!

So is there any deadline (vague or not) when predistortion will be
implemented?

73s Roger, DL5RBW

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[Elecraft] FOR SALE: PR-6/KXV3A REVISED

[Elliott Lawrence via Elecraft]

Price reduced:

I recently upgraded to the KXV3B so the above items are excess to my needs

PR-6 6M receive preamp with power cable/accessory plug and BNC adapters
KXV3A  must be installed in the K3 to use the PR-6

Both $135 shipped Priority Mail.  USPS money order or cleared personal check 
preferred.

Please contact me off the list.

Thanks es 73,
Elliott WA6TLA

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[Elecraft] More sad news: N2CX SK

[Raymond Sills via Elecraft]

Hi Gang:
Joe Everhart, N2CX, passed away on Tuesday, May 14th at his home in Brooklawn, 
NJ.   Joe was considered an engineer's engineer... and a devoted QRPer, 
contributing much to our hobby.  He will be missed.
73 de RayK2ULRKX3 #211
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[Elecraft] DAYTON DISCOUNT?

[Jorge Diez - CX6VM]

Hello

is there any Dayton discount to buy K3, P3, K3/0, cables, powe supply, etc,
etc?

-- 
73,
Jorge
CX6VM/CW5W


Libre
de virus. www.avast.com

<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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Re: [Elecraft] Two Receivers

[Wes]

I could have ten receivers and if all the callers are in my skip zone I wouldn't 
hear them either.


One other thing that I didn't mention, but should be obvious, although many 
callers ignore it, LISTEN to instructions. (Unfortunately too many expeditions 
these days fail to give them---or their callsigns---often enough, assuming I 
suppose that everyone is using spotting networks to figure this out.)


Listening example:  I don't remember the expedition location but do remember one 
of the participants was the banquet speaker at Visalia in 2002, where he 
coincidentally mentioned this very thing.  He was working a pileup on 20-meter 
SSB on 14.195 and announced "Listening up 5 to 10. and 14.190".  I called on 
14.190 on worked him on the first call while the other thousand guys battled up 
5 to 10.


Wes  N7WS

On 5/18/2019 5:14 AM, Vic Rosenthal wrote:

But how can you figure out the pattern (or lack thereof) if you can’t find the 
stations he worked?

Victor 4X6GP



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[Elecraft] ATU kits?

[Drew AF2Z]

I was wondering if it would be feasible to have a KAT4 kit since there 
are a number of large components to be soldered on the board and toroids 
to wind. Might it be a fun project and a few dollars cheaper?


73,
Drew
AF2Z

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Re: [Elecraft] K4 pricing

[Drew AF2Z]

They state that the 1st ship deposit amounts will be "very close" to the 
final sales price.


73,
Drew
AF2Z


On 05/18/19 11:26, John Simmons wrote:
The website clearly says... "Deposit", not "Price". I'm wondering what 
the sale price will be, especially compared to the K3S/P3 combo.


73,
-John NI0K
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[Elecraft] K4 pricing

[John Simmons]

The website clearly says... "Deposit", not "Price". I'm wondering what 
the sale price will be, especially compared to the K3S/P3 combo.


73,
-John NI0K
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Re: [Elecraft] Transverter XV144 way off frequency

[M Cresap via Elecraft]

Bob
My observation is that the K3 reference oscillator is much more stable (moves 
just a few Hz max) than any of the XV transverters even if equipped with ovens. 
I would instead use the LeoBodnar Mini to replace the local oscillator in the 
XV144. The process is identical for the XV222.
Comments below assume an otherwise properly adjusted and operating XV144, and 
that you are handy with a soldering iron or a hot air rework station.

First, before you start, measure the DC voltage at TP1 on the XV144 with a 
voltmeter. Write it down.

Be gentle unsoldering parts from the PCB. The traces and pads are fragile. 

Remove U2 - the regulator for the crystal oscillator. Remove the oven if one is 
installed (no need to create more heat). Remove C15. Repurpose the back panel 
"Aux" BNC connector and run RG174 (or similar cable) from the connector to the 
vicinity of C15. Connect the coax center conductor to one end of a small 1000 
pF disc ceramic capacitor (value not critical) - short leads! The other end of 
the 1000 pF capacitor goes into the now empty hole previously occupied by C15 
that is closest to Q2 with minimum lead length. Ground the coax at both ends. 
Done. The other oscillator components can remain in place. 

Set the LB Mini to 11600 Hz and the output drive to "8 mA". Connect the LB 
Mini output to the "Aux" connector. Check the DC voltage level at TP1. If the 
voltage is the same or higher than the original reading, you are done.  If it 
is less than before, increase the LB Mini output to the "16 mA" setting. 
Measure the DC voltage level at TP1 again. Repeat if necessary. This step makes 
sure you have sufficient drive level to the mixer.
My XV transverters are in close proximity to a computer and router, plus 
several (now shielded) ethernet cables, USB cables and a couple of serial 
cables. There were many weak birdies observed when tuning across the band. Lots 
of ferrites helped a little. There are internet articles by Jim, K9YC who 
discusses why the birdies appear (see his comments and drawings about the "Pin 
1" problem), and Bruce, NT4RT, who shows what he did to (among other things) 
improve the grounding on his XV432. Many of his comments are applicable to the 
XV144. 

Adding in the LB Mini may increase the number of birdies present in the 
receiver output unless additional steps are taken. It may also help reduce 
birdies to run the LB Mini off of a linear lab power supply at 4.5 volts (cut 
off the computer side connector of a USB cable, use the +5 and ground wires in 
the cable to connect to the supply). 

YMMV
73, Mike, W3IP

  From: Don Wilhelm 
 To: Bob KD7YZ ; K3 List  
 Sent: Friday, May 17, 2019 3:24 PM
 Subject: Re: [Elecraft] Transverter XV144 way off frequency
   
Bob,

I skipped Dayton this year.
It is true that there is no stock means of syncing the XV144 to an 
external standard.
A few owners have said they were successful with replacing the crystal 
with a circuit that is synced to an external standard, but I now nothing 
of that implementation.  Perhaps someone who has done it will speak up.

How is JP9 jumpered in your XV144.  For maximum stability, the jumper 
should be between pins 4 and 5 (no other jumpers).  With that setting, 
the crystal oven will be powered as long as 12 volts is applied to your 
XV144 - don't turn the power supply off!  Let the oven warm things up 
for at least a half hour (longer if possible) and then calibrate.  It 
should stay close on frequency.

73,
Don W3FPR

On 5/17/2019 3:06 PM, Bob KD7YZ wrote:
> My K3 has an external "Leo Bodnar" reference [REF * CAL]  . Thus the K3
> is accurate for my EME and MSK144/FT8 adventures on 2m.
> 
> Except: I discovered that the XV144 is not synced with anything.
> The K3 Menu/Config DOES allow for "XV1 OFS", and knob turning, to set in
> a "Calibration" value.
> 
> As I do not have the luxury of a bench of accurate test and calibration
> equipment, I am unable to get the XV1 to get and remain near to accracy.
> 
> Some friends told me they "Thought" that the XV144, external
> Transverter, does have the option for an external GPS REFLOCK as the K3 has.
> 
> Calls to Elecraft revealed, other than friendly people, that there is no
> way they know to REFLOCK the XV144 ..
> 
> So List people, figuring I do not want to calibrate every day, how are
> you users of XV144 keeping your other friends from naggin you every day
> and every time you call CQ on MSK144 ??
> 
> 
> Hoping Don, W3FPR,  will have some time after hectic daily Dayton
> HamFest schedule to answer too.
> 
> 
> --
> 73
> Bob KD7YZ
> AMSAT LM #901
> 
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Re: [Elecraft] K4

[John Stengrevics]

One of my two questions.  The other is regarding relative sensitivity/noise 
floor compared to the K3S.

73,

John
WA1EAZ

> On May 18, 2019, at 10:13 AM, K9MA  wrote:
> 
> I'm very satisfied with my K3, but one feature that might tempt me to buy a 
> K4 would be a really effective noise blanker. It seems to me that a direct 
> sampling receiver ought to be able to do this extremely well. It wouldn't 
> surprise me, though, if the software to do it isn't initially available.
> 
> 73,
> 
> Scott K9MA
> 
> -- 
> Scott  K9MA
> 
> k...@sdellington.us
> 
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[Elecraft] K4 macros

[Tom Doligalski via Elecraft]

Hopefully the K4 macro commands will be very similar to those of the K3. I 
would hate to have to rewrite the driver files used to interface with my 
logging program. 

Tom W4KX

Sent from my iPad
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Re: [Elecraft] KPA1500 AC Mains wire colours

[turnbull]

TU Peter, the amp is up and running.   73 Doug EI2CNSent from my Samsung Galaxy 
smartphone.
 Original message From: Peter Hall  Date: 
18/05/2019  11:55  (GMT+00:00) To: Ken Winterling , Doug 
Turnbull  Cc: Elecraft Reflector  
Subject: RE: [Elecraft] KPA1500 AC Mains wire colours Ken, DougKen is correct.  
Your amplifier comes with a US colour coded cable and, for your 230V supply, 
black is active, white is neutral and green is earth.I had some additional 
searching to find an Australian heavy duty plug that would fit the supplied 
mains cable and a standard 240V outlet, but was in the end 
successful.Regards,Peter, VK6HP-Original Message-From: 
elecraft-boun...@mailman.qth.net  On Behalf 
Of Ken WinterlingSent: Saturday, 18 May 2019 6:24 PMTo: Doug Turnbull 
Cc: Elecraft Reflector Subject: Re: 
[Elecraft] KPA1500 AC Mains wire coloursDoug,I don't have a KPA1500 but these 
are the standard power cord wire colors and functions:*Function   USA  
Europe*Neutral   White    BlueHot Black BrownGround   
Green   Green/Yellow stripeIf there is any doubt you can send an email to 
Elecraft; they are very responsive and helpful.KenWA2LBIOn Sat, May 18, 2019 at 
5:36 AM Doug Turnbull  wrote:> Dear OMs or YLs,>  I have 
a new KPA1500 for use in Europe.  Mine came from Elecraft > direct and thus has 
a US style mains plug and I assume US colour coded > AC power> lead.    What 
are the USA colours for Live, Neutral and Ground?>> The manual does not supply 
a schematic and I do not want to open the amp at> this time.   I can look on 
line for this information but am asking as> regards the KPA1500 so as to be 
certain.>> Thank you.>>  73 Doug 
EI2CN>>__Elecraft 
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Re: [Elecraft] K4

[K9MA]

I'm very satisfied with my K3, but one feature that might tempt me to 
buy a K4 would be a really effective noise blanker. It seems to me that 
a direct sampling receiver ought to be able to do this extremely well. 
It wouldn't surprise me, though, if the software to do it isn't 
initially available.


73,

Scott K9MA

--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] K4

[Don Wilhelm]

Terry,

I agree with Bill.  I suggest you record your important menu preferences 
with paper and pencil.


The K3 configuration file is for disaster recovery, and not intended to 
transfer the configuration of one radio to another.  In fact, it is 
saved with a serial number identifier so it can only be used on that one 
radio.


If you have a lot of stored memories, then it may be that the Frequency 
Memory Editor can be helpful - but I don't know if it will be directly 
reloadable into the K4.


73,
Don W3FPR


On 5/18/2019 9:39 AM, Nr4c wrote:

Probably not. This won’t even work with K3 or K3S. And K4 is entirely new 
architecture.

Sent from my iPhone
...nr4c. bill



On May 17, 2019, at 4:43 PM, Terry Schieler  wrote:

Will I be able to initially load my K3S saved configurations into a new K4?
Will there be any disconnect there?


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Re: [Elecraft] Regarding the K4’s weight

[W0FK]

I'm glad you clarified your question Russ! 

Lou, W0FK


rboutell wrote
> Speaking of which, I don’t suppose you have a topless photo to share? Of
> the
> K4 I meant :)
> 
> 
> 
> -
> 73, Russ - W9RB





-
St. Louis, MO

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


--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] K4

[Nr4c]

Probably not. This won’t even work with K3 or K3S. And K4 is entirely new 
architecture. 

Sent from my iPhone
...nr4c. bill


> On May 17, 2019, at 4:43 PM, Terry Schieler  wrote:
> 
> Will I be able to initially load my K3S saved configurations into a new K4?
> Will there be any disconnect there?
> 
> 
> 
> Terry,  WØFM
> 
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Re: [Elecraft] Regarding the K4’s weight

[rboutell]

Speaking of which, I don’t suppose you have a topless photo to share? Of the
K4 I meant :)



-
73, Russ - W9RB
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] Two Receivers

[Bill Rowlett]

You guys need to read the book “Complete DXer”. It was written by a CW operator 
but what he talks about works for SSB too.

Bill  KC4IM


> On May 18, 2019, at 8:14 AM, Vic Rosenthal  wrote:
> 
> But how can you figure out the pattern (or lack thereof) if you can’t find 
> the stations he worked?
> 
> Victor 4X6GP 
> 
>> On 17 May 2019, at 23:33, Wes  wrote:
>> 
>> I probably shouldn't give away secrets but if you try this on some big 
>> DXpeditions, you will be sorely disappointed.
>> 
>> For example when I was calling VP8STI on RTTY (my friend AA7A operating) I 
>> tried calling on his last listen frequency but he never seemed to call two 
>> stations who were on the same frequency.  So I started looking for a 
>> pattern; many guys will tune up (or down) a few Hz or kHz and pick another 
>> caller.  This didn't seem to be the case either.  After nearly two hours I 
>> finally determined his pattern was he didn't have one, he randomly tuned 
>> after every Q.  I finally picked a relatively clear frequency and called for 
>> awhile until he found me.  I queried him about this later and he confirmed.
>> 
>> In either of these cases you really don't need a second RX to figure this 
>> out.  Your time is better spent learning sequences and planning when and 
>> where to call instead of constantly tuning trying to find the last guy 
>> worked. Besides all of the other two-receiver guys who don't know any better 
>> are going to be calling on the same frequency too.
>> 
>> Wes  N7WS
>> 
>>> On 5/17/2019 11:27 AM, William Levy wrote:
>>> snip---Interesting thing that 2nd RX. You put
>>> the DX on the RX and you find the guy talking to him with the transceiver
>>> and that is called a SLAM DUNK.
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Re: [Elecraft] Two Receivers

[Vic Rosenthal]

But how can you figure out the pattern (or lack thereof) if you can’t find the 
stations he worked?

Victor 4X6GP 

> On 17 May 2019, at 23:33, Wes  wrote:
> 
> I probably shouldn't give away secrets but if you try this on some big 
> DXpeditions, you will be sorely disappointed.
> 
> For example when I was calling VP8STI on RTTY (my friend AA7A operating) I 
> tried calling on his last listen frequency but he never seemed to call two 
> stations who were on the same frequency.  So I started looking for a pattern; 
> many guys will tune up (or down) a few Hz or kHz and pick another caller.  
> This didn't seem to be the case either.  After nearly two hours I finally 
> determined his pattern was he didn't have one, he randomly tuned after 
> every Q.  I finally picked a relatively clear frequency and called for awhile 
> until he found me.  I queried him about this later and he confirmed.
> 
> In either of these cases you really don't need a second RX to figure this 
> out.  Your time is better spent learning sequences and planning when and 
> where to call instead of constantly tuning trying to find the last guy 
> worked. Besides all of the other two-receiver guys who don't know any better 
> are going to be calling on the same frequency too.
> 
> Wes  N7WS
> 
>> On 5/17/2019 11:27 AM, William Levy wrote:
>> snip---Interesting thing that 2nd RX. You put
>> the DX on the RX and you find the guy talking to him with the transceiver
>> and that is called a SLAM DUNK.
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[Elecraft] Regarding the K4’s weight

[Wayne Burdick]

In response to an earlier question:  

The K4 weighs only ~10 lbs (4.5 kg) because of its aluminum matrix 
construction. The four internal shield panels are secured together, as well as 
to the exterior chassis panels. This forms a rigid, lightweight mechanical web 
that resists flexing, like the frame of an aircraft. In contrast many other 
transceivers use a heavy, cast interior frame. 

Wayne
N6KR


elecraft.com
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Re: [Elecraft] KPA1500 AC Mains wire colours

[Peter Hall]

Ken, Doug

Ken is correct.  Your amplifier comes with a US colour coded cable and, for 
your 230V supply, black is active, white is neutral and green is earth.

I had some additional searching to find an Australian heavy duty plug that 
would fit the supplied mains cable and a standard 240V outlet, but was in the 
end successful.

Regards,
Peter, VK6HP



-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Ken Winterling
Sent: Saturday, 18 May 2019 6:24 PM
To: Doug Turnbull 
Cc: Elecraft Reflector 
Subject: Re: [Elecraft] KPA1500 AC Mains wire colours

Doug,I don't have a KPA1500 but these are the standard power cord wire colors 
and functions:

*Function   USA  Europe*
Neutral   WhiteBlue
Hot Black Brown
Ground   Green   Green/Yellow stripe

If there is any doubt you can send an email to Elecraft; they are very 
responsive and helpful.

Ken
WA2LBI


On Sat, May 18, 2019 at 5:36 AM Doug Turnbull  wrote:

> Dear OMs or YLs,
>  I have a new KPA1500 for use in Europe.  Mine came from Elecraft 
> direct and thus has a US style mains plug and I assume US colour coded 
> AC power
> lead.What are the USA colours for Live, Neutral and Ground?
>
> The manual does not supply a schematic and I do not want to open the amp at
> this time.   I can look on line for this information but am asking as
> regards the KPA1500 so as to be certain.
>
> Thank you.
>
>  73 Doug EI2CN
>
>
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[Elecraft] Most Curious Spec

[Kevin, N4TT]

Of the specs listed so far, the one I find amazing is the weight.

How does all that radio fit into a 10 lb package without compromise?

I know Elecraft is known for leaning towards the compact and light weight
side of things. For comparison, another new radio just released is almost
27 lbs. A flex 6700 weighs about 13 lbs and there's no faceplate or display
on it.

Definitely not tied to a desk.

Curious.

73,
Kev N4TT
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Re: [Elecraft] KPA1500 AC Mains wire colours

[Ken Winterling]

Doug,I don't have a KPA1500 but these are the standard power cord wire
colors and functions:

*Function   USA  Europe*
Neutral   WhiteBlue
Hot Black Brown
Ground   Green   Green/Yellow stripe

If there is any doubt you can send an email to Elecraft; they are very
responsive and helpful.

Ken
WA2LBI


On Sat, May 18, 2019 at 5:36 AM Doug Turnbull  wrote:

> Dear OMs or YLs,
>  I have a new KPA1500 for use in Europe.  Mine came from Elecraft
> direct
> and thus has a US style mains plug and I assume US colour coded AC power
> lead.What are the USA colours for Live, Neutral and Ground?
>
> The manual does not supply a schematic and I do not want to open the amp at
> this time.   I can look on line for this information but am asking as
> regards the KPA1500 so as to be certain.
>
> Thank you.
>
>  73 Doug EI2CN
>
>
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[Elecraft] KPA1500 AC Mains wire colours

[Doug Turnbull]

Dear OMs or YLs,
 I have a new KPA1500 for use in Europe.  Mine came from Elecraft direct
and thus has a US style mains plug and I assume US colour coded AC power
lead.What are the USA colours for Live, Neutral and Ground?

The manual does not supply a schematic and I do not want to open the amp at
this time.   I can look on line for this information but am asking as
regards the KPA1500 so as to be certain.

Thank you.

 73 Doug EI2CN


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Re: [Elecraft] K4 full duplex?

[Edward R Cole]

Joe,

The link you supplied was not available when I wrote my reply last 
night (in Alaska 4 hours behind EDST).

That label is encouraging.

Since the basic K4 model has two direct conversion receivers perhaps 
one can operate in duplex on a separate antenna.  Would depend on 
separate DSP and audio cktry being present.


The announcement refers to addition of VHF/UHF module (which I take 
to be internal to the radio cabinet unlike current XV series).


Ref is likely the same EXREF module added to the synth as in the 
K3  Overall freq stability will depend on the TCXO like it is in 
the current K3/K3s if that is true.


I hope provision is made for export of baseband IQ from both Rx.  I 
take both main-IF and sub-IF from my K3 to two LP-Pan locked to the 
same LO to make use of dual-polarity diversity reception on 
2m-eme.  Being able to run special sw using IQ input from the K4 
would set it apart from most other radios.


I am not planning to buy a K4 during the initial roll out.  I would 
wait for the kit version K4D.


I have a venerable basic FT-736R that will do 144/432 duplex for the 
current crop of satellites.  Their is work on a geosta 5/10 GHz 
hamsat that would use digital modulation and require a special 
transceiver (that is beyond any current satellite radio).  Issue with 
such is finding  cheap launch.


So quite happy with my upgraded K3 and KX3 (for now).

73, Ed - KL7UW

On 2019-05-17 11:43 AM, Edward R Cole wrote:
 > I suspect not because only one ANT connector is designated VHF/UHF.

Look more carefully ... it appears that the XVTR IF IN jack is also
marked "V/U ANT 2".  Might be enough to allow duplex on 144/432.

In addition, the rear panel marking does not designate ANT 4 as
VHF/UHF only so perhaps a software upgrade will allow use of other
antenna jacks for VHF/UHF.



73,

... Joe, W4TV


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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