date:20150213

If both RX and TX are using the same synthesizer, TX phase noise should be 
lowered.
However, I am no expert on Icom IC7850 but more information will be given in 
the link below:
The Icom IC-7850 at APDXC 2014

|   |
|   |  |   |   |   |   |   |
| The Icom IC-7850 at APDXC 2014The IC-7850 at APDXC 2014, Osaka, Japan by Adam 
Farson VA7OJ/AB4OJ Hot News! The IC-7850 and IC-7851  received FCC and IC 
certification on 15 January 201... |
|  |
| 查看於 www.ab4oj.com | Yahoo 預覽 |
|  |
|   |


The idea of reciprocal mixing dynamic range RMDR now becomes a more realistic 
measure of RX.
73
Johnny VR2XMC  寄件人︰ Jim Brown 
 收件人︰ elecraft@mailman.qth.net 
 傳送日期︰ 2015年02月14日 (週六) 11:00 AM
 主題︰ Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)
   
On Fri,2/13/2015 4:19 PM, Johnny Siu wrote:
> Again, IC7850 is known foir extremely low phase noise.

Is it known for it's low phase noise on TX?

73, Jim K9YC


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[Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

Thanks, Don, you are great in explaining the figures in layman terms.  While I 
cannot control the other's transmitters' IMD / phase noise, I now at least know 
what I will expect to be better off by using the KSYN3A especially under very 
difficult RX conditions (assuming everything under the same conditions as the 
current KSYN3).
TNX,
Johnny VR2XMC
  寄件人︰ Don Wilhelm 
 收件人︰ Johnny Siu ; Elecraft Reflector 

 傳送日期︰ 2015年02月14日 (週六) 8:44 AM
 主題︰ Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

Johnny,

Hopefully I can simplify it a bit given your example.
That S9+60dB signal will have a weaker response in your receiver *if* 
your receiver was the limiting factor.  If the transmitter phase noise 
(splatter and other 'bad stuff' was the original problem, then you may 
or may not have any improvement for that example.

In other words, you will notice an improvement if other signals on the 
band are relatively clean.  The improvement when other signals on the 
band are not clean will not be as obvious.

Actually if an S9+60dB signal 10 kHz away is going to give you problems, 
then that signal is coming from a 'dirty transmitter'.  I think a better 
example would be -- If you can operate within 2 kHz of a strong signal 
with the current KSYN3, then the KSYN3A may be able to allow you to 
operate within 1.5 to 1.8 kHz of that same signal.  In other words, you 
will be able to "saddle up closer" to any signal unless the transmitter 
is creating trash.

Note: All numbers are for relative comparison only.  I pulled those 
numbers out of my head for illustration purposes only and do not 
represent any test data.  I have not seen nor used the KSYN3A.

73,
Don W3FPR

On 2/13/2015 7:19 PM, Johnny Siu wrote:
> I must admit that understanding those figures are beyond my knowledge.  In 
> practical terms, if I can now hear a below S1 cw weak signal 10KHz away from 
> a S9+60db station before upgrade, what will be the improvement after the 
> installation of KSYN3A assuming operating under the same condition?
> Such a demonstation was given to me when I visited Icom HQ in Osaka last year 
> in the announcement of the IC7850/IC7851.  Again, IC7850 is known foir 
> extremely low phase noise.
> Can any elecrafters interpret the improvements in an understandable layman 
> terms?
> 73
> Johnny VR2XMCK-Line + KX3 + HR50
>        寄件人︰ Wayne Burdick 
>  收件人︰ Elecraft Reflector 
> 副本(CC)︰ "elecraft...@yahoogroups.com" 
>  傳送日期︰ 2015年02月14日 (週六) 7:34 AM
>  主題︰ [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)
>    
> Hi all,
>
> I've updated the KSYN3A FAQ with the following information regarding testing 
> of a K3 with the new synthesizer performed by Rob Sherwood, NC0B.
>
> * * *
>
> Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using 
> the new synthesizer?
>
> A: Our tests show in excess of 105 dB with the narrowest filters, though 
> there are many factors, and this should be considered approximate. (A very 
> robust test setup is required to make these measurements.) Rob Sherwood 
> tested a K3 with a KSYN3A and obtained the following results:
>
>      2-kHz IMDDR3 with 200-Hz roofing and DSP filter = 106 dB
>      2-kHz IMDDR3 with 400-Hz roofing and DSP filter = 103 dB
>
> Rob will be posting this information in his receiver performance chart 
> (http://www.sherweng.com/table.html) after he completes his full suite of 
> tests.
>
> * * *
>
> The above numbers were used with Rob's permission.
>
> 73,
> Wayne
> N6KR

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Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

2015-02-13 Thread dave

> That's a far ways from -89 dB that you
> quote.

The ARRL review in the April 2008 issue of the K3/10 showed reciprocal 
mixing as -95 dBc at 2 kHz spacing.

The ARRL review in the Jan 2009 issue of the K3/100 showed reciprocal 
mixing as -86 dBc at 2 kHz spacing.

This is the same lab. Dunno about same test equipment.

73 de dave
ab9ca/4

On 2/13/15 10:29 PM, Joe Subich, W4TV wrote:

On 2015-02-13 10:08 PM, Chortek Bob via Elecraft wrote:

The new synthesizer has essential the SAME IMDDR 106 or 103
depending  on the filter bandwidth.

Incorrect!  You are comparing measurements by different labs with
different test equipment and procedures.

Sherwood measured 104 dB w/200 Hz filter and 96 dB w/400 Hz filter
for the old Synth vs. 106 and 103 for new synth.  That's 2 to 7 dB
improvement depending on filter bandwidth.  Since the synthesizer
is about 6dBc/Hz better than the old synthesizer, the first order
estimation is that the improvement in narrow spaced IMDDR3 is due
to the decrease in phase noise.

So, my question:   is the real import of all this that the new
synthesizer will give the K3 an IMDDR which is NOT limited to 86
dbs by Reciprocal Mixing so we will now get the FULL benefit of a
IMDDR of 106/103?If so, that 20 db improvement is huge.

One would need to look into the way in which ARRL measures Reciprocal
Mixing to understand exactly what that "Spec" is telling you and what
improvement one might find.  It is safe to expect the reduction in
phase noise to directly impact both narrow spaced IMDDR3 and Reciprocal
Mixing.

BTW, I just reviewed the original ARRL review of the K3 (April 2008)
and their Reciprocal Mixing numbers were -116 dBc @20 KHz, -106 dBc
@ 5 KHz and -95dBc at 2 KHz.  That's a far ways from -89 dB that you
quote.  Assuming a 6 dBc/Hz noise improvement in the new synthesizer,
you can make the numbers -122, -112, -101 which would be a significant
improvement.

73,

   ... Joe, W4TV

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Re: [Elecraft] KSYN3A




I operate 2m-eme with JT65 and will be very interested to see if I
can see improvement with the new synth.


I'm guessing not unless you see some direct (tropo) signals.


JT-65, like all weak-signal modes, greatly benefits from low
phase-noise in a receiver (typically from the LO).


On HF JT65 and JT9 as well as 6M tropo, the improved phase noise
should be significant doe to the lower reciprocal mixing ... the
strong signals in the passband will not raise the noise floor as
much.

73,

  ... Joe, W4TV


On 2015-02-13 5:53 PM, Edward R Cole wrote:

Doug,

JT-65, like all weak-signal modes, greatly benefits from low phase-noise
in a receiver (typically from the LO).
I operate 2m-eme with JT65 and will be very interested to see if I can
see improvement with the new synth.

Nor will I part with my sub-rcvr as its integral to my dual-polarity
adaptive reception using JT65.  I use diversity reception with receivers
connected to different polarities.  The sw that provides adaptive
reception is MAP65.

73, Ed - KL7UW

From: "Doug Turnbull" 
To: "'Richard Thorpe'" ,"'Elecraft List'"
 
Subject: Re: [Elecraft] KSYN3A
Message-ID: <685CC641927645DDA5FFB8A3A5128C80@DOUG1>
Content-Type: text/plain;   charset="us-ascii"

Dear OMs,
 In no way would I part with my sub-receiver.
==snip===
A few interesting questions have been asked - is there any
advantage
for JT-65 with the new board?
=snip

  73 Doug EI2CN


73, Ed - KL7UW
http://www.kl7uw.com
 "Kits made by KL7UW"
Dubus Mag business:
 dubus...@gmail.com

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Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)



On 2015-02-13 10:08 PM, Chortek Bob via Elecraft wrote:

The new synthesizer has essential the SAME IMDDR 106 or 103
depending  on the filter bandwidth.


Incorrect!  You are comparing measurements by different labs with
different test equipment and procedures.

Sherwood measured 104 dB w/200 Hz filter and 96 dB w/400 Hz filter
for the old Synth vs. 106 and 103 for new synth.  That's 2 to 7 dB
improvement depending on filter bandwidth.  Since the synthesizer
is about 6dBc/Hz better than the old synthesizer, the first order
estimation is that the improvement in narrow spaced IMDDR3 is due
to the decrease in phase noise.


So, my question:   is the real import of all this that the new
synthesizer will give the K3 an IMDDR which is NOT limited to 86
dbs by Reciprocal Mixing so we will now get the FULL benefit of a
IMDDR of 106/103?If so, that 20 db improvement is huge.


One would need to look into the way in which ARRL measures Reciprocal
Mixing to understand exactly what that "Spec" is telling you and what
improvement one might find.  It is safe to expect the reduction in
phase noise to directly impact both narrow spaced IMDDR3 and Reciprocal
Mixing.

BTW, I just reviewed the original ARRL review of the K3 (April 2008) and 
their Reciprocal Mixing numbers were -116 dBc @20 KHz, -106 dBc

@ 5 KHz and -95dBc at 2 KHz.  That's a far ways from -89 dB that you
quote.  Assuming a 6 dBc/Hz noise improvement in the new synthesizer,
you can make the numbers -122, -112, -101 which would be a significant
improvement.

73,

  ... Joe, W4TV

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Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)



Argh!  That will make the K3 second to the Flex 6700 in Sherwood's
table  although the 100 KHz blocking will be better than the "A/D
Limited" for the 6700.

73,

   ... Joe, W4TV


On 2015-02-13 6:34 PM, Wayne Burdick wrote:

Hi all,

I've updated the KSYN3A FAQ with the following information regarding testing of 
a K3 with the new synthesizer performed by Rob Sherwood, NC0B.

* * *

Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using 
the new synthesizer?

A: Our tests show in excess of 105 dB with the narrowest filters, though there 
are many factors, and this should be considered approximate. (A very robust 
test setup is required to make these measurements.) Rob Sherwood tested a K3 
with a KSYN3A and obtained the following results:

 2-kHz IMDDR3 with 200-Hz roofing and DSP filter = 106 dB
 2-kHz IMDDR3 with 400-Hz roofing and DSP filter = 103 dB

Rob will be posting this information in his receiver performance chart 
(http://www.sherweng.com/table.html) after he completes his full suite of tests.

* * *

The above numbers were used with Rob's permission.

73,
Wayne
N6KR

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Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

2015-02-13 Thread Chortek Bob via Elecraft

Thanks for the figures. I am trying to understand the amount of improvement we 
can expect. 
According to the ARRL Review in January 2009 the IMDDR was 106/103 dbm at 2 KHZ 
but the Reciprocal Mixing was -86dbc at 2KHZ offset with 500 HZ bandwidth.  
The new synthesizer has essential the SAME IMDDR 106 or 103 depending on the 
filter bandwidth.  
So, my question:   is the real import of all this that the new synthesizer will 
give the K3 an IMDDR which is NOT limited to 86 dbs by Reciprocal Mixing so we 
will now get the FULL benefit of a IMDDR of 106/103?If so, that 20 db 
improvement is huge.
I may be mixing apples and oranges, but I am just trying to understand this.  
Thanks for any clarification the group can provide.
73,
Bob/AA6VB

  From: Wayne Burdick 
 To: Elecraft Reflector  
Cc: "elecraft...@yahoogroups.com"  
 Sent: Friday, February 13, 2015 3:34 PM
 Subject: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)
   
Hi all,

I've updated the KSYN3A FAQ with the following information regarding testing of 
a K3 with the new synthesizer performed by Rob Sherwood, NC0B.

* * *

Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using 
the new synthesizer?

A: Our tests show in excess of 105 dB with the narrowest filters, though there 
are many factors, and this should be considered approximate. (A very robust 
test setup is required to make these measurements.) Rob Sherwood tested a K3 
with a KSYN3A and obtained the following results:

    2-kHz IMDDR3 with 200-Hz roofing and DSP filter = 106 dB
    2-kHz IMDDR3 with 400-Hz roofing and DSP filter = 103 dB

Rob will be posting this information in his receiver performance chart 
(http://www.sherweng.com/table.html) after he completes his full suite of tests.

* * *

The above numbers were used with Rob's permission.

73,
Wayne
N6KR

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Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

2015-02-13 Thread Jim Brown


On Fri,2/13/2015 4:19 PM, Johnny Siu wrote:

Again, IC7850 is known foir extremely low phase noise.


Is it known for it's low phase noise on TX?

73, Jim K9YC
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Re: [Elecraft] KSYN3A

2015-02-13 Thread Doug Person via Elecraft

It's just one of those things that really annoy me.  I ordered the 
KSYN3A.  Shipping via UPS was calculated as $20.00+ for a package 
weighting .8 pounds.  When I run the same locations and service through 
UPS.com I get $8.38.  That's a of markup on the shipping. Just sayin


Doug -- K0DXV
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[Elecraft] K3KSYN3A

2015-02-13 Thread David Cole

Will Elecraft be offering a trade in program for the old Synth
boards?  :)
-- 
Thanks and 73's,
For equipment, and software setups and reviews see:
www.nk7z.net
for MixW support see;
http://groups.yahoo.com/neo/groups/mixw/info
for Dopplergram information see:
http://groups.yahoo.com/neo/groups/dopplergram/info
for MM-SSTV see:
http://groups.yahoo.com/neo/groups/MM-SSTV/info




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Re: [Elecraft] KSYN3A

Good thing they don't get into Reef Aquariums
;)

  From: Don Wilhelm 
 To: elecraft@mailman.qth.net 
 Sent: Friday, February 13, 2015 7:23 PM
 Subject: Re: [Elecraft] KSYN3A
   
Consider those who willingly spend $5k or so for a transceiver 
configured to the max, but balk at spending $5 for a cable adapter or 
something special of that nature.  Perhaps "thrifty" is a more 
politically correct term.

73,
Don W3FPR



On 2/13/2015 6:20 PM, Phil Wheeler wrote:
> I find it had to regard Elecraft-owning hams as "cheap", Rick :-)
>
> Phil W7OX
>
> On 2/13/15 2:49 PM, Rick WA6NHC wrote:
>> Not a totally useless idea, it gives Elecraft a supply for those 
>> simple wanting to add the KXR3 without doing the upgrade.  Since they 
>> won't be making more and hams are generically cheap
>

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Re: [Elecraft] KSYN3A

2015-02-13 Thread bs usb


I think you are confusing 'thrifty' and 'stingy'.


Don Wilhelm wrote:
Consider those who willingly spend $5k or so for a transceiver 
configured to the max, but balk at spending $5 for a cable adapter or 
something special of that nature.  Perhaps "thrifty" is a more 
politically correct term.


73,
Don W3FPR

On 2/13/2015 6:20 PM, Phil Wheeler wrote:

I find it had to regard Elecraft-owning hams as "cheap", Rick :-)

Phil W7OX

On 2/13/15 2:49 PM, Rick WA6NHC wrote:
Not a totally useless idea, it gives Elecraft a supply for those 
simple wanting to add the KXR3 without doing the upgrade.  Since 
they won't be making more and hams are generically cheap




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Re: [Elecraft] KSYN3A

2015-02-13 Thread Don Wilhelm


Fred,

See my response to Johnny Siu.  That is the best I can do to explain it 
in "layman's terms".


73,
Don W3FPR

On 2/13/2015 8:03 PM, k6...@foothill.net wrote:
What would I gain from the new Synth?  I have no nearby phase noise 
problems since Jim [WX6V] got a K3, and I think my TX signal is 
"within specs."




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Re: [Elecraft] KSYN3A

2015-02-13 Thread k6dgw

I know one of those, obviously far better off than we are, who  tips on 
the total less tax in a restaurant.  I decided to buy him lunch.  It is 
what it is, we're all different.


On-topic question:  I'm totally happy with my fairly vanilla K3 [S/N 642 
upgraded a few years ago at Elecraft].  No sub-Rx, 2.7 SSB and 500 Hz 
CW, DVR, and KBPF3.  95% CW, rest RTTY [contests] and SSB [SOTA].  My 
K-line is "fairly well installed in the rack," the rear gives new 
meaning to the term "wireless," and taking it apart is a bit of a chore. 
 Getting it back together is a bigger chore.


What would I gain from the new Synth?  I have no nearby phase noise 
problems since Jim [WX6V] got a K3, and I think my TX signal is "within 
specs."


73,

Fred K6DGW
TDY Bakersfield CA [don't ask why :-)]

On 2015-02-13 16:23, Don Wilhelm wrote:

Consider those who willingly spend $5k or so for a transceiver
configured to the max, but balk at spending $5 for a cable adapter or
something special of that nature.  Perhaps "thrifty" is a more
politically correct term.


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Re: [Elecraft] KSYN3A

2015-02-13 Thread Chris Tate - N6WM

Wow thanks Wayne and Elecraft for another improvement to a legendary rig..  or 
as I told my wife.. "I have just had to factor an extra $400 into the monthly 
budget".  ;-).

~C.
N6WM

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne 
Burdick
Sent: Friday, February 13, 2015 3:20 PM
To: Bill Frantz
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KSYN3A


On Feb 13, 2015, at 3:15 PM, Bill Frantz  wrote:

> One thing I couldn't see from the Elecraft web site: I have a single receiver 
> K3. If I install the KSYN3A, and later add a second receiver, which synth do 
> I get in that second receiver.

You'll get the new synth with the KRX3 in this case. And there's no change in 
price for the KRX3 option.

73,
Wayne
N6KR



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Re: [Elecraft] KSYN3A

2015-02-13 Thread Nate Bargmann

* On 2015 13 Feb 15:20 -0600, Bill NY9H wrote:
> now we need a neat application for the old synth card
> seems that there will be a few thousand available

Wayne alluded earlier that they were holding some subreceiver kits back
for those interested in fitting one into a K3 with the older synth
board.  Perhaps Elecraft would be interested in a modest trade-in value
for some of those boards.

73, Nate, N0NB

-- 

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

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Re: [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

2015-02-13 Thread Don Wilhelm


Johnny,

Hopefully I can simplify it a bit given your example.
That S9+60dB signal will have a weaker response in your receiver *if* 
your receiver was the limiting factor.  If the transmitter phase noise 
(splatter and other 'bad stuff' was the original problem, then you may 
or may not have any improvement for that example.


In other words, you will notice an improvement if other signals on the 
band are relatively clean.  The improvement when other signals on the 
band are not clean will not be as obvious.


Actually if an S9+60dB signal 10 kHz away is going to give you problems, 
then that signal is coming from a 'dirty transmitter'.  I think a better 
example would be -- If you can operate within 2 kHz of a strong signal 
with the current KSYN3, then the KSYN3A may be able to allow you to 
operate within 1.5 to 1.8 kHz of that same signal.  In other words, you 
will be able to "saddle up closer" to any signal unless the transmitter 
is creating trash.


Note: All numbers are for relative comparison only.  I pulled those 
numbers out of my head for illustration purposes only and do not 
represent any test data.  I have not seen nor used the KSYN3A.


73,
Don W3FPR

On 2/13/2015 7:19 PM, Johnny Siu wrote:

I must admit that understanding those figures are beyond my knowledge.  In 
practical terms, if I can now hear a below S1 cw weak signal 10KHz away from a 
S9+60db station before upgrade, what will be the improvement after the 
installation of KSYN3A assuming operating under the same condition?
Such a demonstation was given to me when I visited Icom HQ in Osaka last year 
in the announcement of the IC7850/IC7851.  Again, IC7850 is known foir 
extremely low phase noise.
Can any elecrafters interpret the improvements in an understandable layman 
terms?
73
Johnny VR2XMCK-Line + KX3 + HR50
寄件人︰ Wayne Burdick 
  收件人︰ Elecraft Reflector 
副本(CC)︰ "elecraft...@yahoogroups.com" 
  傳送日期︰ 2015年02月14日 (週六) 7:34 AM
  主題︰ [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

Hi all,


I've updated the KSYN3A FAQ with the following information regarding testing of 
a K3 with the new synthesizer performed by Rob Sherwood, NC0B.

* * *

Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using 
the new synthesizer?

A: Our tests show in excess of 105 dB with the narrowest filters, though there 
are many factors, and this should be considered approximate. (A very robust 
test setup is required to make these measurements.) Rob Sherwood tested a K3 
with a KSYN3A and obtained the following results:

 2-kHz IMDDR3 with 200-Hz roofing and DSP filter = 106 dB
 2-kHz IMDDR3 with 400-Hz roofing and DSP filter = 103 dB

Rob will be posting this information in his receiver performance chart 
(http://www.sherweng.com/table.html) after he completes his full suite of tests.

* * *

The above numbers were used with Rob's permission.

73,
Wayne
N6KR

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Re: [Elecraft] KSYN3A

Yes, that makes sense, Don -- and not so 
pejorative as "cheap" :-)


73, Phil W7OX

On 2/13/15 4:23 PM, Don Wilhelm wrote:
Consider those who willingly spend $5k or so for 
a transceiver configured to the max, but balk at 
spending $5 for a cable adapter or something 
special of that nature.  Perhaps "thrifty" is a 
more politically correct term.


73,
Don W3FPR

On 2/13/2015 6:20 PM, Phil Wheeler wrote:
I find it hard to regard Elecraft-owning hams 
as "cheap", Rick :-)


Phil W7OX

On 2/13/15 2:49 PM, Rick WA6NHC wrote:
Not a totally useless idea, it gives Elecraft 
a supply for those simple wanting to add the 
KXR3 without doing the upgrade.  Since they 
won't be making more and hams are generically 
cheap


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Re: [Elecraft] KSYN3A

2015-02-13 Thread Don Wilhelm

Consider those who willingly spend $5k or so for a transceiver 
configured to the max, but balk at spending $5 for a cable adapter or 
something special of that nature.  Perhaps "thrifty" is a more 
politically correct term.


73,
Don W3FPR

On 2/13/2015 6:20 PM, Phil Wheeler wrote:

I find it had to regard Elecraft-owning hams as "cheap", Rick :-)

Phil W7OX

On 2/13/15 2:49 PM, Rick WA6NHC wrote:
Not a totally useless idea, it gives Elecraft a supply for those 
simple wanting to add the KXR3 without doing the upgrade.  Since they 
won't be making more and hams are generically cheap




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[Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

I must admit that understanding those figures are beyond my knowledge.  In 
practical terms, if I can now hear a below S1 cw weak signal 10KHz away from a 
S9+60db station before upgrade, what will be the improvement after the 
installation of KSYN3A assuming operating under the same condition?
Such a demonstation was given to me when I visited Icom HQ in Osaka last year 
in the announcement of the IC7850/IC7851.  Again, IC7850 is known foir 
extremely low phase noise.
Can any elecrafters interpret the improvements in an understandable layman 
terms?
73
Johnny VR2XMCK-Line + KX3 + HR50
   寄件人︰ Wayne Burdick 
 收件人︰ Elecraft Reflector  
副本(CC)︰ "elecraft...@yahoogroups.com"  
 傳送日期︰ 2015年02月14日 (週六) 7:34 AM
 主題︰ [Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)
   
Hi all,

I've updated the KSYN3A FAQ with the following information regarding testing of 
a K3 with the new synthesizer performed by Rob Sherwood, NC0B.

* * *

Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using 
the new synthesizer?

A: Our tests show in excess of 105 dB with the narrowest filters, though there 
are many factors, and this should be considered approximate. (A very robust 
test setup is required to make these measurements.) Rob Sherwood tested a K3 
with a KSYN3A and obtained the following results:

    2-kHz IMDDR3 with 200-Hz roofing and DSP filter = 106 dB
    2-kHz IMDDR3 with 400-Hz roofing and DSP filter = 103 dB

Rob will be posting this information in his receiver performance chart 
(http://www.sherweng.com/table.html) after he completes his full suite of tests.

* * *

The above numbers were used with Rob's permission.

73,
Wayne
N6KR

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[Elecraft] Update to KSYN3A FAQ (some measured dynamic range numbers)

Hi all,

I've updated the KSYN3A FAQ with the following information regarding testing of 
a K3 with the new synthesizer performed by Rob Sherwood, NC0B.

* * *

Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using 
the new synthesizer?

A: Our tests show in excess of 105 dB with the narrowest filters, though there 
are many factors, and this should be considered approximate. (A very robust 
test setup is required to make these measurements.) Rob Sherwood tested a K3 
with a KSYN3A and obtained the following results:

2-kHz IMDDR3 with 200-Hz roofing and DSP filter = 106 dB
2-kHz IMDDR3 with 400-Hz roofing and DSP filter = 103 dB

Rob will be posting this information in his receiver performance chart 
(http://www.sherweng.com/table.html) after he completes his full suite of tests.

* * *

The above numbers were used with Rob's permission.

73,
Wayne
N6KR

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Re: [Elecraft] KSYN3A

I find it had to regard Elecraft-owning hams as 
"cheap", Rick :-)


Phil W7OX

On 2/13/15 2:49 PM, Rick WA6NHC wrote:
Not a totally useless idea, it gives Elecraft a 
supply for those simple wanting to add the KXR3 
without doing the upgrade.  Since they won't be 
making more and hams are generically cheap


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Re: [Elecraft] KSYN3A


On Feb 13, 2015, at 3:15 PM, Bill Frantz  wrote:

> One thing I couldn't see from the Elecraft web site: I have a single receiver 
> K3. If I install the KSYN3A, and later add a second receiver, which synth do 
> I get in that second receiver.

You'll get the new synth with the KRX3 in this case. And there's no change in 
price for the KRX3 option.

73,
Wayne
N6KR



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Re: [Elecraft] KSYN3A

2015-02-13 Thread Bill Frantz

One thing I couldn't see from the Elecraft web site: I have a 
single receiver K3. If I install the KSYN3A, and later add a 
second receiver, which synth do I get in that second receiver.


One advantage of the K3 is its Barbie Doll (tm) feature. I can 
add pieces slowly to the radio and stay under the worst of my 
YL/budget master/KI6SLX's radar screen. It may take several 
years, but it is the best way for me to end up with a 
top-of-the-line radio.


73 Bill AE6JV

---
Bill Frantz| Since the IBM Selectric, keyboards have gotten
408-356-8506   | steadily worse. Now we have touchscreen keyboards.
www.pwpconsult.com | Can we make something even worse?

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Re: [Elecraft] KSYN3A


Doug,

JT-65, like all weak-signal modes, greatly benefits from low 
phase-noise in a receiver (typically from the LO).
I operate 2m-eme with JT65 and will be very interested to see if I 
can see improvement with the new synth.


Nor will I part with my sub-rcvr as its integral to my dual-polarity 
adaptive reception using JT65.  I use diversity reception with 
receivers connected to different polarities.  The sw that provides 
adaptive reception is MAP65.


73, Ed - KL7UW

From: "Doug Turnbull" 
To: "'Richard Thorpe'" ,"'Elecraft List'"

Subject: Re: [Elecraft] KSYN3A
Message-ID: <685CC641927645DDA5FFB8A3A5128C80@DOUG1>
Content-Type: text/plain;   charset="us-ascii"

Dear OMs,
In no way would I part with my sub-receiver.
==snip===
   A few interesting questions have been asked - is there any advantage
for JT-65 with the new board?
=snip

 73 Doug EI2CN


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] KSYN3A

2015-02-13 Thread Rick WA6NHC

Not a totally useless idea, it gives Elecraft a supply for those simple 
wanting to add the KXR3 without doing the upgrade.  Since they won't be 
making more and hams are generically cheap, it will extend the K3 life 
for those without a toy budget.


Best to ask Wayne if they can manage that first however...  Maybe a 
coupon for a future purchase.


I'll likely get a pair to keep my K3 current... along with the SVGA 
upgrade for the P3, I'm tired of squinting, this K1N showed me I needed 
to see more.


Rick wa6nhc

On 2/13/2015 1:46 PM, VE3GNO Daniel via Elecraft wrote:

Once I got the new synt's here I can donate my old ones back to elecraft just 
in case they are running out of old ones...


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Re: [Elecraft] KSYN3A

I am copying a reply I made on the 600m e-mail reflector as I think 
it may answer some questions how the K3 is used down below 500-KHz:

To: Jim Miller 
Subject: Re: [600MRG] [Elecraft] Upgraded K3 synthesizer module now 
available: The KSYN3A

Jim,

The K3 operates all modes in TEST: 
CW/SSB/AM/FM/DATA/RTTY/packet/psk-msk, etc.  I can run psk-31, JT65, 
WSPR using DATA-A.  Any soundcard sw runs normally with the K3.  TEST 
mode essentially is placing the K3 into transverter mode with 
inputs/outputs available at the transverter connectors or Rx ANT.  It 
uses the general coverage filter to operate outside normal ham bands.

Not sure what you mean by external mixing.

You just PRESS-HOLD the MODE down button to get into TEST and operate 
the K3 normally.  It just lowers in power to mw and routes thru the 
transverter interface module KXV3.  Look on page 75 at the K3 block 
diagram at the upper right corner which shows the KXV3.  Right below 
is shows the BP filters and the 10w PA/Driver and final are bypassed 
to the KXV3.  That is all the TEST mode does.

The new SYNTH board allows operation lower in frequency.  The gen 
coverage BP filter KBPF3 nominally covers 500-KHz to 30 
MHz.  Performance drops off above 30 though the radio will tune to 32 
MHz in the transverter mode.  I assume there is no change in the 
KBPF3 so it will also drop off below 500-KHz but apparently not 
significantly until below 450-KHz.

This is a BIG WIN for Elecraft to enter the 600m Ham Band when it 
gets approved.  They can already sell to countries that have created 
the 600m ham band.

And I have no motivation to build a transverter for 600m, now.  The 
prototype pc boards would run costs up to at least $400 for the 
initial transverter.  Instead I get two new synth boards and install 
them in less than 30-min.  The bonus is the lowered phase noise for 
weak-signal work.

Those Elecraft guys are pretty crafty-smart.

73, Ed

At 08:47 AM 2/13/2015, Jim Miller wrote:
What modes are available if using Test? Does Test at least provide 
CW keyed out?

Seems like sound card modes like JT65 or WSPR would still require 
external mixing before the amp.

73

Jim ab3cv

73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] KSYN3A FAQ


A couple comments to add to Wayne's:

1.  How many of you have measured the noise floor below 500-KHz?  I 
have used my K3/10 and a SDR-IQ for receiving the 600m band for three 
years.  The SDR-IQ display is in dBm and very accurate.  The receiver 
MDS is -130 to -132 dBm at 500-KHz.  The lowest noise floor I see 
with my inverted-L antenna is -115 dBm.  Often it is -100 or even -90 dBm.


So reality is that sky noise and local noise environment will be your 
receiving limit vs the MDS of the K3.  Those of you who operate on 
160m will recognize what I am saying.  I have not gone below 300-KHz 
so do not know what the noise looks like down there. There is a RGPS 
beacon 3-miles from my house that comes in at -30dBm on 310-KHz.  It 
would be a good propagation beacon for anyone that wants to work me 
on 600m (currently my antenna is down).


Now if you own acreage to put up a Beverage antenna then you may get 
noise low enough to utilize the MDS.  Then there is always adding a 
low noise preamp to improve MDS.


2. Many of us in the ARRL Experimental Group or with experimental 
licenses for operating on 600m utilize bandpass filters to reduce BC 
interference.  I have a Clifton Labs Z10020 Rejection Filter 
(540-1700 KHz) which is limited to 100mw if you plan to transmit thru 
it.  I use it only for receiving.  An Anchorage station (65mi NE) on 
550-KHz normally is seen at -50 dBm, drops into the noise with the 
filter and the broad noise sidebands disappear.

http://www.cliftonlaboratories.com

73, Ed - KL7UW, WD2XSH/45

From: Wayne Burdick 
To: Eric NO3M 
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KSYN3A FAQ
Message-ID: 
Content-Type: text/plain; charset=us-ascii

The KBPF3's lowest-frequency filter has a nominal passband of 0.5-2 
MHz. The rolloff is not particularly steep, but this is the reason 
that the MDS at 250 kHz is -90 dBm, while it's -125 dBm at 450 kHz.


Intermod should rarely be a factor because of the K3's very robust front end.

Those living practically on top of an AM broadcast station typically 
have been through this drill already and have notch filters. If not, 
we can design one for you (you get to build it, though :)


Wayne
N6KR


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] KSYN3A

Once I got the new synt's here I can donate my old ones back to elecraft just 
in case they are running out of old ones...
vy 73 de VE3GNO Daniel
  From: Bill NY9H 
 To: elecraft@mailman.qth.net 
 Sent: Friday, February 13, 2015 4:19 PM
 Subject: Re: [Elecraft] KSYN3A
   
now we need a neat application for the old synth card
seems that there will be a few thousand available

What cool thing could we build in which to nest the olds synth card 

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[Elecraft] More KSYN3A

2015-02-13 Thread Richard Thorpe

I talked to Elecraft and you must remove the second receiver not just unplug it 
and remove its “old” synth board.  Too bad, but for the times I use it a $200 
upgrade is just too much, so I order one new synth board remove the two old 
ones and the second receive, the “cost” of upgrading I guess. Put the second 
receive away never to be see again.

R Thorpe K6CG
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Re: [Elecraft] KSYN3A

2015-02-13 Thread Bill NY9H


now we need a neat application for the old synth card
seems that there will be a few thousand available

What cool thing could we build in which to nest the olds synth card 

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Re: [Elecraft] KSYN3A



On 2/13/15 12:54 PM, Doug Turnbull wrote:

  Like a few other fortunate souls I have two K3s and if the new KSYN3A
is enough of an advance then I will first upgrade one radio then the other.
Good. You can do an A-B test after upgrading one 
of them and give us a full report :-)


Phil W7OX

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Re: [Elecraft] KSYN3A

As I see it for those who want the extra capabilities will pay it.The sell as 
sub receiver to pay for a 200 option seems a bit haste.

The K3 is just as capable as it was yesterday, this is merely adding to it.
If money is that tight I'd rather just keep the Sub receiver as it is more 
useful

  From: bs usb 
 To: elecraft@mailman.qth.net 
 Sent: Friday, February 13, 2015 3:04 PM
 Subject: Re: [Elecraft] KSYN3A

I think the idea is to remove the sub receiver, sell it, and use the 
proceeds to offset the cost of another option.

You see lots of second receivers on the bay because lots of people have 
the same idea.  Everyone selling reduces the people buying because the 
are all coming out of the same pool of users.  I mean who is going to 
want an Elecraft sub receiver if they don't have Elecraft equipment?

So the 'savings' premis, although logical at first blush, is actually 
seriously flawed.  First off, even if you do find a buyer, the selling 
price is going to be far less than you payed for it because it is used 
and unwanted.  Then, if you later decide to add the sub receiver back, 
you end up possibly paying full price if you have to go back to the 
manufacturer.  That is not a savings.

Harry Yingst via Elecraft wrote:
> Why remove it?
> The sub receiver is very nice
>
>
>        From: Richard Thorpe 
>  To: Elecraft List 
>  Sent: Friday, February 13, 2015 2:15 PM
>  Subject: [Elecraft] KSYN3A
>    
> The most cost effective thing to do is to remove the sub-receive and save 
> $200 bucks and upgrade the main synth only. I can see a lot of second 
> receivers on eBay.
>
> R Thorpe K6CG
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Re: [Elecraft] KSYN3A

2015-02-13 Thread Doug Turnbull

Dear OMs,
In no way would I part with my sub-receiver.   I operate 160M and find
diversity reception a considerable help.I also like the ability to tune
the second receiver through a pile up extending 20KhZ and sometimes offset
nearly 100 KHz.

 The sub-receiver is not needed by most people and I would not wish to
over specify some ones radio - the K3 is affordable in the basic
configuration and an excellent performer.   Modular design allows one to
update and upgrade - which is just fine.

  Like a few other fortunate souls I have two K3s and if the new KSYN3A
is enough of an advance then I will first upgrade one radio then the other.


   A few interesting questions have been asked - is there any advantage
for JT-65 with the new board?Sadly though CW is my mode; my speed is not
at 35 WPM for rag chews.   Maybe at times 30 WPM but not 35 WPM plus.The
improvements may prove useful for CW contests - this will convince me.   As
pointed out previously SSB signals are so lousy from many radios that the
improved receiver performance might not be noticed.   So I am waiting to see
what other report but I am keen.

   I do not want a K4 and it delights me to see this enlightened
attitude by Elecraft to improving and extending product life.   This is not
the norm.   An old Yankee maxim is, "Use it up; Fix it up; Make do; Do
without" Elecraft should appeal to the six North Eastern States.

 73 Doug EI2CN  

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Richard Thorpe
Sent: 13 February 2015 19:15
To: Elecraft List
Subject: [Elecraft] KSYN3A

The most cost effective thing to do is to remove the sub-receive and save
$200 bucks and upgrade the main synth only. I can see a lot of second
receivers on eBay.

R Thorpe K6CG
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Re: [Elecraft] KSYN3A FAQ




On 2015-02-13 3:15 PM, Wayne Burdick wrote:

Another interesting issue regarding the Flex 6xxx series (and radios
with a similar direct-digital-sampling RF architecture) is that "A/D
Limit" descriptor in the blocking dynamic range column in Sherwood's
chart. An ADC limit is a hard one; it does not gracefully soft-limit
in the presence of strong signals, like an amplifier stage. Multiple
signals in the passband can cause additive peaks that hit this ADC
limit sooner, causing ghost signals (IMD) to appear. 3-tone (or
higher) testing may be needed to quantify the effect of the ADC limit
in DDC receivers. Perhaps "A/D Limit" can then be converted into a
useful number.


In an e-mail exchange with Chen, W7AY some months ago he indicated the
"number of tones" seems to be somewhere around 10.  However, I'm sure
that is fuzzy and depends a lot on the frequency relationship and if
they are all of similar strength or there is a wide dynamic range.

Perhaps the best way to test dynamic range in direct digital sampling
receivers is noise power testing.  Run a "notched noise signal" of a
known level into the DDS receiver and increase the noise power until
the noise floor in the notch increases 1 dB.

73,

   ... Joe, W4TV





Wayne
N6KR



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[Elecraft] FOR SALE LP- PAN 2

2015-02-13 Thread KURT RENNER

   I have for sale LP - PAN -2, XONARU7 7.1 USB Sound Card.

 

$300.00 plus shipping. PAY PAL ONLY.

 

E-mail me off list. krenner1...@msn.com

 

K0ARO   Kurt
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Re: [Elecraft] Further K3 development



On 2015-02-13 1:03 PM, Fred Smith wrote:

Most all Elecraft gear here as far as radios except for an IC-9100
which there are no replacements for.


No Elecraft replacement for ... I plan to look carefully at the FT-991
tomorrow (Orlando Hamcation) as it seems to cover all the bases except
for 1.2 GHz.  It would give me an excuse to replace both my token Yaesu
(FT-2000) and Icom (IC-706mkIIg) rigs.

73,

   ... Joe, W4TV



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Re: [Elecraft] KSYN3A FAQ

Another interesting issue regarding the Flex 6xxx series (and radios with a 
similar direct-digital-sampling RF architecture) is that "A/D Limit" descriptor 
in the blocking dynamic range column in Sherwood's chart. An ADC limit is a 
hard one; it does not gracefully soft-limit in the presence of strong signals, 
like an amplifier stage. Multiple signals in the passband can cause additive 
peaks that hit this ADC limit sooner, causing ghost signals (IMD) to appear. 
3-tone (or higher) testing may be needed to quantify the effect of the ADC 
limit in DDC receivers. Perhaps "A/D Limit" can then be converted into a useful 
number.

Wayne
N6KR

On Feb 13, 2015, at 12:07 PM, "Joe Subich, W4TV"  wrote:

> 
> On 2015-02-13 2:37 PM, Jim Brown wrote:
>> And in the real world, this is the limiting factor. In my real
>> world, it's an IC7600 with a legal limit amp ten miles away.
> 
> Consider yourself lucky.  In my real world, it's an IC-746 and legal
> limit amp 0.65 miles away!
> 
>> Yes. While I've seen statements (I hate the word "claim" in this kind
>> of sentence, since it implies that the person making the statement is
>> a liar) that the latest Flex series radios are as clean or cleaner,
>> I've not seen ARRL measurements to confirm that.
> 
> No, but one can infer that from the Receiver data published by Sherwood
> on the Flex 6700 (receive LO Noise = 145 dBc/Hz).  Given the design of
> those "radios" the phase noise is generally clock jitter and would be
> reciprocal in transmit.
> 
> 73,
> 
>  ... Joe, W4TV
> 
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Re: [Elecraft] KSYN3A

Both synthesizers must be of the same type.

73,
Wayne
N6KR

On Feb 13, 2015, at 12:04 PM, Phil Wheeler  wrote:

> Apparently to save $200 :-)
> 
> In this vein, I wonder what would happen if you updated the main RX but left 
> the sub RX as is? Question for Wayne, I guess.
> 
> Hypothetical in my case: I have only one functional ear, so no sub RX. But my 
> KSYN3A should arrive late next week.
> 
> Phil W7OX
> 
> On 2/13/15 11:46 AM, Harry Yingst via Elecraft wrote:
>> Why remove it?
>> The sub receiver is very nice
>> 
>> 
>>   From: Richard Thorpe 
>>  To: Elecraft List 
>>  Sent: Friday, February 13, 2015 2:15 PM
>>  Subject: [Elecraft] KSYN3A
>>The most cost effective thing to do is to remove the sub-receive and save 
>> $200 bucks and upgrade the main synth only. I can see a lot of second 
>> receivers on eBay.
>> 
>> R Thorpe K6CG
> 
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Re: [Elecraft] KSYN3A FAQ



On 2015-02-13 2:37 PM, Jim Brown wrote:

And in the real world, this is the limiting factor. In my real
world, it's an IC7600 with a legal limit amp ten miles away.


Consider yourself lucky.  In my real world, it's an IC-746 and legal
limit amp 0.65 miles away!


Yes. While I've seen statements (I hate the word "claim" in this kind
of sentence, since it implies that the person making the statement is
a liar) that the latest Flex series radios are as clean or cleaner,
I've not seen ARRL measurements to confirm that.


No, but one can infer that from the Receiver data published by Sherwood
on the Flex 6700 (receive LO Noise = 145 dBc/Hz).  Given the design of
those "radios" the phase noise is generally clock jitter and would be
reciprocal in transmit.

73,

  ... Joe, W4TV

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Re: [Elecraft] KSYN3A

2015-02-13 Thread bs usb

I think the idea is to remove the sub receiver, sell it, and use the 
proceeds to offset the cost of another option.


You see lots of second receivers on the bay because lots of people have 
the same idea.  Everyone selling reduces the people buying because the 
are all coming out of the same pool of users.  I mean who is going to 
want an Elecraft sub receiver if they don't have Elecraft equipment?


So the 'savings' premis, although logical at first blush, is actually 
seriously flawed.  First off, even if you do find a buyer, the selling 
price is going to be far less than you payed for it because it is used 
and unwanted.  Then, if you later decide to add the sub receiver back, 
you end up possibly paying full price if you have to go back to the 
manufacturer.  That is not a savings.


Harry Yingst via Elecraft wrote:

Why remove it?
The sub receiver is very nice


   From: Richard Thorpe 
  To: Elecraft List 
  Sent: Friday, February 13, 2015 2:15 PM
  Subject: [Elecraft] KSYN3A

The most cost effective thing to do is to remove the sub-receive and save $200 bucks and upgrade the main synth only. I can see a lot of second receivers on eBay.


R Thorpe K6CG
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Re: [Elecraft] KSYN3A


Apparently to save $200 :-)

In this vein, I wonder what would happen if you 
updated the main RX but left the sub RX as is? 
Question for Wayne, I guess.


Hypothetical in my case: I have only one 
functional ear, so no sub RX. But my KSYN3A should 
arrive late next week.


Phil W7OX

On 2/13/15 11:46 AM, Harry Yingst via Elecraft wrote:

Why remove it?
The sub receiver is very nice


   From: Richard Thorpe 
  To: Elecraft List 
  Sent: Friday, February 13, 2015 2:15 PM
  Subject: [Elecraft] KSYN3A

The most cost effective thing to do is to remove the sub-receive and save $200 bucks and upgrade the main synth only. I can see a lot of second receivers on eBay.


R Thorpe K6CG


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Re: [Elecraft] Further K3 development

2015-02-13 Thread Robert Vargas KP4Y via Elecraft

My backup radio is a TS-590S, and I wish Kenwood had taken a similar approach 
as Elecraft to upgrade it into the new TS-590SG. It's really admirable that 
Elecraft decided not to take advantage of the advancements in technology to 
generate additional revenue. These guys are really hams and engineers above all 

Robert-KP4Y/W4 

 On Friday, February 13, 2015 1:41 PM, Gary Smith  wrote:

 My opinion which may or may not be worth 2 cents:

The KX3 seems to satisfy many who would otherwise be buying a K3, 
maybe a K2 or K1. To me the KX3 is a fabulous & affordable QRP rig. 
However nice that tiny wonder is, I prefer the larger K3 with its 
greater choices and options which I find most helpful to my DXing & 
contesting interests. 

Considering what I do with my K3, I can't imagine what they could do 
to make a much better radio; I'm not sure what a future "K4" would 
have that I would find more appealing other than maybe another couple 
inches of width and maybe 1" of height for my 10 thumbs but till 
then, with the K3 being so modular and upgrades possible by 
replacing/exchanging boards, I'm expecting the K3 will be the 
flagship for years to come.

Every company has to address profit margins to be viable and I'd much 
rather give Elecraft more $ for component upgrades than have to sell 
my K3 to then purchase a surely more expensive, fully loaded "K4" or 
whatever it would be called. 

I love the option of keeping the K3 at the top of the game & Elecraft 
making a satisfactory profit by making that possible. Elecraft; you 
keep improving as you're doing, I'll keep upgrading.

& thanks!

73, Gary KA1J 

> Still some room to improve the K3,  so thanks Elecraft for working to 
> keep it up to date.
> 73 Merv K9FD/KH6

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Re: [Elecraft] [Elecraft_K3] Re: KSYN3A FAQ

On Feb 13, 2015, at 11:58 AM, "'Joe Subich, W4TV' li...@subich.com 
[Elecraft_K3]"  wrote:

> 
> Wayne,
> 
> >> A: With preamp OFF, we measured about -125 dBm at 475 kHz and -90
> >> dBm at 250 kHz. We have not measured MDS below 250 kHz, but the
> >> receiver will gradually become less sensitive as you go lower in
> >> frequency due to band-pass filter rolloff (in the KBPF3, which is
> >> required for operation below 160 meters).
> 
> Would it make sense to update the KBPF3 to replace (or convert) the
> 0.5 - 2 MHz BPF to a 2 MHz LPF? Perhaps by removing L1/L2, changing
> L4/L5 to 2.0 uH, removing C6 and connecting a new inductor (~10 uH) 
> between pins 2/7 of K2?

This is certainly not necessary for use of the 600-meter band, or even for 
listening to beacons in the 300-kHz range, which I've been doing lately. If you 
were really determined to improve MDS below 250 kHz, you could do this. I would 
start thinking about the lower-frequency limitations of the PIN diodes with 
large signals.

73,
Wayne
N6KR

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Re: [Elecraft] [Elecraft_K3] KSYN3A FAQ

Good idea. One of our engineers will be assigned to this when he comes up for 
air.

Wayne
N6KR


On Feb 13, 2015, at 10:58 AM, "mstang...@comcast.net [Elecraft_K3]" 
 wrote:

> Wayne,
> 
> While we have your attention...do you have updated schematics for the K3, 
> including this new board? The K3 schematics on the website are dated June 
> 2010.
> 
> Mike N2MS
> - Original Message -
> From: Wayne Burdick n...@elecraft.com [Elecraft_K3] 
> 
> To: Elecraft Reflector 
> Cc: elecraft...@yahoogroups.com 
> Sent: Fri, 13 Feb 2015 18:27:01 - (UTC)
> Subject: [Elecraft_K3] KSYN3A FAQ
> 
> In response to a gazillion questions:
> 
> 
> 
> *
> __._,_.___
> Posted by: mstang...@comcast.net
> Reply via web post•Reply to sender
> •Reply to group •   Start 
> a New Topic   •   Messages in this topic (2)  
>  
> VISIT YOUR GROUP 
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> 
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>  
> 
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Re: [Elecraft] KSYN3A FAQ

The KBPF3's lowest-frequency filter has a nominal passband of 0.5-2 MHz. The 
rolloff is not particularly steep, but this is the reason that the MDS at 250 
kHz is -90 dBm, while it's -125 dBm at 450 kHz.

Intermod should rarely be a factor because of the K3's very robust front end.

Those living practically on top of an AM broadcast station typically have been 
through this drill already and have notch filters. If not, we can design one 
for you (you get to build it, though :)

Wayne
N6KR


On Feb 13, 2015, at 10:53 AM, Eric NO3M  wrote:

> What is the passband of the filtering engaged in the KBPF3 when operating at 
> 630M?  The concern at this band in many locations is BCB intermod, and 
> generally an LPF is used in the RX chain.  Is it not of concern based on 
> on-air tests, perhaps KBPF3 is on the table for an upgrade, or an outbound 
> LPF recommended?
> 
> 73 Eric NO3M (experimental 630M license: WG2XJM)
> 
> On 02/13/2015 01:27 PM, Wayne Burdick wrote:
>> 
>> Q:  What is the K3's 100-490 kHz receive sensitivity? What signals would I 
>> find in this range?
>> 
>> A:  With preamp OFF, we measured about -125 dBm at 475 kHz and -90 dBm at 
>> 250 kHz. We have not measured MDS below 250 kHz, but the receiver will 
>> gradually become less sensitive as you go lower in frequency due to 
>> band-pass filter rolloff (in the KBPF3, which is required for operation 
>> below 160 meters). These tests were made with the signal routed through the 
>> RX ANT IN or XVTR IN jacks on the KXV3 option module. The preamp is not 
>> effective in this range and must be turned off. A sub receiver (KRX3) fitted 
>> with a KBPF3 should have similar performance, whether the signal is obtained 
>> from the main path (KXV3) or from the sub's AUX RF input.
>> 
>> 
> 
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Re: [Elecraft] KSYN3A FAQ

Wayne,

Would it make sense to update the KBPF3 to replace (or convert) the
0.5 - 2 MHz BPF to a 2 MHz LPF? Perhaps by removing L1/L2, changing
L4/L5 to 2.0 uH, removing C6 and connecting a new inductor (~10 uH)
between pins 2/7 of K2?

73,

... Joe, W4TV

On 2015-02-13 1:27 PM, Wayne Burdick wrote:

In response to a gazillion questions:

* * *

Q: What is involved in upgrading from the KSYN3 to the KSYN3A?

A: The KSYN3A plugs into the same connectors as the KSYN3s for the main and
sub synthesizers. There are minor differences in cable routing that are covered
in the accompanying installation instructions. No user calibration is required
for the KSYN3A, simplifying the installation process. Version 5.10 or later K3
firmware is required (presently available on our web site as a beta release).

Q: Will the new synthesizer module be included in future orders of the KRX3
sub receiver?

A: Yes. But we also have limited quantities of the original synthesizer boards
for those with existing K3s who wish to add a KRX3 but not upgrade the synth.
Questions on specific orders should go to sa...@elecraft.com.

Q: What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using
the new synthesizer?

A: Our tests show in excess of 105 dB with the narrowest filters, though there
are many factors, and this should be considered approximate. (A very robust
test setup is required to make these measurements.) A third party has obtained
similar results, but they have not published them yet. When they do, we will
update this FAQ.

Q: How much lower is the KSYN3A's phase noise than that of the original KSYN3?
How does this affect signals?

A: At an offset of 2 kHz, the KSYN3A's phase noise is typically 15 to 20 dB
lower on a given band. Generally speaking, this means a smaller increase in the
noise floor in receive mode in the presence of very strong close-in signals.
The limiting factor would then be how clean everyone else's signals are. Your
own transmit signal will be cleaner when using the KSYN3A, though the K3
already has one of the cleanest transmitters available, accounting for its
popularity with DXpeditions and multi-transmitter contest stations.

Q: What is the K3's 100-490 kHz receive sensitivity? What signals would I find
in this range?

A: With preamp OFF, we measured about -125 dBm at 475 kHz and -90 dBm at 250
kHz. We have not measured MDS below 250 kHz, but the receiver will gradually
become less sensitive as you go lower in frequency due to band-pass filter
rolloff (in the KBPF3, which is required for operation below 160 meters). These
tests were made with the signal routed through the RX ANT IN or XVTR IN jacks
on the KXV3 option module. The preamp is not effective in this range and must
be turned off. A sub receiver (KRX3) fitted with a KBPF3 should have similar
performance, whether the signal is obtained from the main path (KXV3) or from
the sub's AUX RF input.

As for signals: there's the 600-meter band (more on that below), a large number
of commercial CW beacons (for example, see www.dxinfocentre.com/ndb.htm), and
other interesting phenomena. We've just begun to explore it ourselves!

Q: Will I notice any change in performance if I upgrade to the KSYN3A?

A: First there's the obvious -- the ability to tune the VFOs much lower in
frequency. If you're a high-speed CW operator, you should be able to hear an
improvement in CW element timing at high code speeds, as well as somewhat
faster receive recovery. The dynamic range of the K3 was already excellent, and
its phase noise very low, so you might notice the additional improvement in
these parameters only in very difficult signal conditions.

Q: How does the new synth affect CW operation?

A: The KSYN3A switches faster than the KSYN3, which allows us to more precisely control CW timing. This means less
"jitter" (timing variation) at high CW speeds. Many CW operators who had been using "QRQ" mode (CONFIG:CW
QRQ=ON) for CW in the 35-60 WPM range will now be able to use normal CW mode (CW QRQ=OFF), meaning they no longer give up RIT and
SPLIT when using fast CW. Receive recover times also improve. Note that we recently introduced a variation on CW break-in signal
processing called "NEW QSK" (selected by tapping '3' in the CW WGHT menu entry). This eliminates audio T/R artifacts
heard with the original algorithm ("OLD QSK"), at the expense of some slowing of receive recovery (by purging the DSP's
"pipeline"). Installing a KSYN3A speeds up receive recovery for both the OLD and NEW QSK settings.

Q: What is required to use the 600-meter band?

A: This band is available in some countri

Re: [Elecraft] KSYN3A

Why remove it?
The sub receiver is very nice


  From: Richard Thorpe 
 To: Elecraft List  
 Sent: Friday, February 13, 2015 2:15 PM
 Subject: [Elecraft] KSYN3A
   
The most cost effective thing to do is to remove the sub-receive and save $200 
bucks and upgrade the main synth only. I can see a lot of second receivers on 
eBay.

R Thorpe K6CG
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Re: [Elecraft] KSYN3A FAQ

2015-02-13 Thread Jim Brown


On Fri,2/13/2015 10:27 AM, Wayne Burdick wrote:

The limiting factor would then be how clean everyone else's signals are.


And in the real world, this is the limiting factor.  In my real world, 
it's an IC7600 with a legal limit amp ten miles away.



Your own transmit signal will be cleaner when using the KSYN3A, though the K3 
already has one of the cleanest transmitters available,


Yes. While I've seen statements (I hate the word "claim" in this kind of 
sentence, since it implies that the person making the statement is a 
liar) that the latest Flex series radios are as clean or cleaner, I've 
not seen ARRL measurements to confirm that.  I suspect that part of that 
is work in the ARRL Lab with new test equipment capable of testing 
radios with improved dynamic range on TX.


73, Jim K9YC
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[Elecraft] KSYN3A

2015-02-13 Thread Richard Thorpe

The most cost effective thing to do is to remove the sub-receive and save $200 
bucks and upgrade the main synth only. I can see a lot of second receivers on 
eBay.

R Thorpe K6CG
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Re: [Elecraft] Further K3 development

I've had my K3 about a year now and Unless something drastically changes I 
highly doubt I'd changeAt first I was surprised at it's size, but now I like 
that size and really don't want it larger.
I also like that it's modular (K3, P3, KPA500, KAT500, Etc.).

I think what appeals to me most is some of the thought that went into it.They 
kept the interface as RS-232 and Not USB (Thank goodness for that).
I also like that it's not all molded plastic, yea I like the simple less is 
more style.

It takes a lot to impress me and this is probably the first radio I would even 
consider rating a 10.
If you stop and think about it for what the K3 and accessories really cost the 
price is actually quite fair.(I think we get quite the band for out buck)





  From: Gary Smith 
 To: Elecraft@mailman.qth.net 
 Sent: Friday, February 13, 2015 1:16 PM
 Subject: Re: [Elecraft] Further K3 development
   
My opinion which may or may not be worth 2 cents:

The KX3 seems to satisfy many who would otherwise be buying a K3, 
maybe a K2 or K1. To me the KX3 is a fabulous & affordable QRP rig. 
However nice that tiny wonder is, I prefer the larger K3 with its 
greater choices and options which I find most helpful to my DXing & 
contesting interests. 

Considering what I do with my K3, I can't imagine what they could do 
to make a much better radio; I'm not sure what a future "K4" would 
have that I would find more appealing other than maybe another couple 
inches of width and maybe 1" of height for my 10 thumbs but till 
then, with the K3 being so modular and upgrades possible by 
replacing/exchanging boards, I'm expecting the K3 will be the 
flagship for years to come.

Every company has to address profit margins to be viable and I'd much 
rather give Elecraft more $ for component upgrades than have to sell 
my K3 to then purchase a surely more expensive, fully loaded "K4" or 
whatever it would be called. 

I love the option of keeping the K3 at the top of the game & Elecraft 
making a satisfactory profit by making that possible. Elecraft; you 
keep improving as you're doing, I'll keep upgrading.

& thanks!

73, Gary KA1J 



> Still some room to improve the K3,  so thanks Elecraft for working to 
> keep it up to date.
> 73 Merv K9FD/KH6


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Re: [Elecraft] KSYN3A FAQ

2015-02-13 Thread Eric NO3M

What is the passband of the filtering engaged in the KBPF3 when 
operating at 630M?  The concern at this band in many locations is BCB 
intermod, and generally an LPF is used in the RX chain.  Is it not of 
concern based on on-air tests, perhaps KBPF3 is on the table for an 
upgrade, or an outbound LPF recommended?


73 Eric NO3M (experimental 630M license: WG2XJM)

On 02/13/2015 01:27 PM, Wayne Burdick wrote:


Q:  What is the K3's 100-490 kHz receive sensitivity? What signals would I find 
in this range?

A:  With preamp OFF, we measured about -125 dBm at 475 kHz and -90 dBm at 250 
kHz. We have not measured MDS below 250 kHz, but the receiver will gradually 
become less sensitive as you go lower in frequency due to band-pass filter 
rolloff (in the KBPF3, which is required for operation below 160 meters). These 
tests were made with the signal routed through the RX ANT IN or XVTR IN jacks 
on the KXV3 option module. The preamp is not effective in this range and must 
be turned off. A sub receiver (KRX3) fitted with a KBPF3 should have similar 
performance, whether the signal is obtained from the main path (KXV3) or from 
the sub's AUX RF input.




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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

2015-02-13 Thread Jim Brown


On Fri,2/13/2015 6:56 AM, VE3GNO Daniel via Elecraft wrote:

that's gonna be fun, coz now there is a lot of buzz with new 7850 super low 
noise LO,


Um -- when ARRL tested the Icom 7800 and 7600 rigs, they were among the 
poorest performers with respect to transmitted noise. I suspect that the 
massive improvement they are citing may be simply in comparison to their 
own previous products, and with the Yaesu products, which tested even 
worse.


73, Jim K9YC
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[Elecraft] Battery Operation of KX3

2015-02-13 Thread w...@msn.com

I am using a Power Bank model MP-16000 Lithium Polymer battery to run 
the KX3.  This appears to now be furnished by Maxtron as the MX160A 
power bank at $128 on Amazon.   It is lightweight (1.1 lbs) and is about 
the size of a paperback book.


Last night I ran the KX3 with backlight on for 3.5 hrs and only used 
about 15-20% of its capacity on the 12v output, so I would expect to get 
about 4-5 days of use at that rate!  It fully recharged in about 1-1/2 
hours.   It puts out 12v at 5 amps.  The supplied adapter cable for 
using the various connectors exactly fits the KX3 with no adapter 
needing to be used.  It can also charge your USB device at 2.4A at the 
same time.  The output is switch selectable for 12/16/19v.


Ron W7HD

--
Sent with Postbox 
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[Elecraft] KSYN3A FAQ

In response to a gazillion questions:

* * *

Q:  What is involved in upgrading from the KSYN3 to the KSYN3A?

A:  The KSYN3A plugs into the same connectors as the KSYN3s for the main and 
sub synthesizers. There are minor differences in cable routing that are covered 
in the accompanying installation instructions. No user calibration is required 
for the KSYN3A, simplifying the installation process. Version 5.10 or later K3 
firmware is required (presently available on our web site as a beta release).


Q:  Will the new synthesizer module be included in future orders of the KRX3 
sub receiver?

A:  Yes. But we also have limited quantities of the original synthesizer boards 
for those with existing K3s who wish to add a KRX3 but not upgrade the synth. 
Questions on specific orders should go to sa...@elecraft.com.


Q:  What is the approximate 2-kHz dynamic range (IMDDR3) of the K3 when using 
the new synthesizer?

A:  Our tests show in excess of 105 dB with the narrowest filters, though there 
are many factors, and this should be considered approximate. (A very robust 
test setup is required to make these measurements.) A third party has obtained 
similar results, but they have not published them yet. When they do, we will 
update this FAQ.


Q:  How much lower is the KSYN3A's phase noise than that of the original KSYN3? 
How does this affect signals?

A:  At an offset of 2 kHz, the KSYN3A's phase noise is typically 15 to 20 dB 
lower on a given band. Generally speaking, this means a smaller increase in the 
noise floor in receive mode in the presence of very strong close-in signals. 
The limiting factor would then be how clean everyone else's signals are. Your 
own transmit signal will be cleaner when using the KSYN3A, though the K3 
already has one of the cleanest transmitters available, accounting for its 
popularity with DXpeditions and multi-transmitter contest stations.


Q:  What is the K3's 100-490 kHz receive sensitivity? What signals would I find 
in this range?

A:  With preamp OFF, we measured about -125 dBm at 475 kHz and -90 dBm at 250 
kHz. We have not measured MDS below 250 kHz, but the receiver will gradually 
become less sensitive as you go lower in frequency due to band-pass filter 
rolloff (in the KBPF3, which is required for operation below 160 meters). These 
tests were made with the signal routed through the RX ANT IN or XVTR IN jacks 
on the KXV3 option module. The preamp is not effective in this range and must 
be turned off. A sub receiver (KRX3) fitted with a KBPF3 should have similar 
performance, whether the signal is obtained from the main path (KXV3) or from 
the sub's AUX RF input. 

As for signals: there's the 600-meter band (more on that below), a large number 
of commercial CW beacons (for example, see www.dxinfocentre.com/ndb.htm), and 
other interesting phenomena. We've just begun to explore it ourselves!


Q:  Will I notice any change in performance if I upgrade to the KSYN3A? 

A:  First there's the obvious -- the ability to tune the VFOs much lower in 
frequency. If you're a high-speed CW operator, you should be able to hear an 
improvement in CW element timing at high code speeds, as well as somewhat 
faster receive recovery. The dynamic range of the K3 was already excellent, and 
its phase noise very low, so you might notice the additional improvement in 
these parameters only in very difficult signal conditions. 


Q:  How does the new synth affect CW operation?

A:  The KSYN3A switches faster than the KSYN3, which allows us to more 
precisely control CW timing. This means less "jitter" (timing variation) at 
high CW speeds. Many CW operators who had been using "QRQ" mode (CONFIG:CW 
QRQ=ON) for CW in the 35-60 WPM range will now be able to use normal CW mode 
(CW QRQ=OFF), meaning they no longer give up RIT and SPLIT when using fast CW. 
Receive recover times also improve. Note that we recently introduced a 
variation on CW break-in signal processing called "NEW QSK" (selected by 
tapping '3' in the CW WGHT menu entry). This eliminates audio T/R artifacts 
heard with the original algorithm ("OLD QSK"), at the expense of some slowing 
of receive recovery (by purging the DSP's "pipeline"). Installing a KSYN3A 
speeds up receive recovery for both the OLD and NEW QSK settings.


Q:  What is required to use the 600-meter band? 

A:  This band is available in some countries, often on an experimental basis. 
Specific restrictions may apply. A K3 fitted with a KSYN3A, as well as a KXV3 
and KBPF3, can receive signals on this band, and can put out about 1 milliwatt 
of transmit power. An external amplifier will be needed, connected to the XVTR 
OUT jack. At present we don't have information on such amplifiers. You can also 
get on this band using an up-conversion transverter whose output is on a low HF 
band (also not presently supplied by Elecraft). For a general introduction to 
the 600-meter band, see:

   wikipedia.org/wiki/600-meter_amateur_radio_band


Q:  Can a tra

Re: [Elecraft] Further K3 development

2015-02-13 Thread Gary Smith

My opinion which may or may not be worth 2 cents:

The KX3 seems to satisfy many who would otherwise be buying a K3, 
maybe a K2 or K1. To me the KX3 is a fabulous & affordable QRP rig. 
However nice that tiny wonder is, I prefer the larger K3 with its 
greater choices and options which I find most helpful to my DXing & 
contesting interests. 

Considering what I do with my K3, I can't imagine what they could do 
to make a much better radio; I'm not sure what a future "K4" would 
have that I would find more appealing other than maybe another couple 
inches of width and maybe 1" of height for my 10 thumbs but till 
then, with the K3 being so modular and upgrades possible by 
replacing/exchanging boards, I'm expecting the K3 will be the 
flagship for years to come.

Every company has to address profit margins to be viable and I'd much 
rather give Elecraft more $ for component upgrades than have to sell 
my K3 to then purchase a surely more expensive, fully loaded "K4" or 
whatever it would be called. 

I love the option of keeping the K3 at the top of the game & Elecraft 
making a satisfactory profit by making that possible. Elecraft; you 
keep improving as you're doing, I'll keep upgrading.

& thanks!

73, Gary KA1J 



> Still some room to improve the K3,  so thanks Elecraft for working to 
> keep it up to date.
> 73 Merv K9FD/KH6


---
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[Elecraft] TEST

2015-02-13 Thread KURT RENNER

   Test
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Re: [Elecraft] Further K3 development

2015-02-13 Thread Fred Smith

This was one of the very reasons that I finally moved to Elecraft and sold
my last 2 FTDX-5000MP's several yrs ago and have plans on returning. Most
all Elecraft gear here as far as radios except for an IC-9100 which there
are no replacements for.

May they continue their present business model, as it works very well.


73,
Fred/N0AZZ
K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100
P3/SVGA--KAT500--W2
Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G
300+w--(2) B-5016-G's 165w 2m



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug
Turnbull
Sent: Friday, February 13, 2015 11:04 AM
To: 'Terry Hart'; elecraft@mailman.qth.net
Subject: [Elecraft] Further K3 development

Dear OMs,   
 I will follow this thread for a while.   It would be nice to know more
about the performance enhancement as Johnny Siu has stated.

 What I am really chuffed about is that Wayne, Eric and company are
enhancing a radio which has been on the market perhaps seven years now.
Oh I like the modular design and construction and I love the company.

 The K3 is not being made obsolete but it is being updated right back to
SN 1 - My friend Brendan Minish, EI6IZ can update SN 42 and no doubt he
will.I will be contacting Brendan to see what he thinks.

  Good going guys, my loyalty is rewarded yet attain.   If I can be
jingoistic it is nice to see an American company performing in this manner.
The edge is not lost.   Great to see the engineering continue to evolve the
K3 - thank you.

 73 Doug EI2CN 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Terry
Hart
Sent: 13 February 2015 14:39
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available:
TheKSYN3A

---and I just received my K3 kit serial number 8795. I had no idea this was
coming up!
The extended receiver tuning down to 100KHz sounds interestingwhat are
the front-end filtering arrangements for that, I wonder? And it would be
interesting to see some comparative close-in phase noise plots.

Terry G3VFO


- Original Message -
From: "Harry Yingst via Elecraft" 
To: "Wayne Burdick" ; "Elecraft Reflector" 
; "elecraft...@yahoogroups.com" 

Sent: Friday, February 13, 2015 1:17 PM
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The
KSYN3A


> Dang, I just put the sub receiver in last week I should have 
> waited
>
>
>
>  From: Wayne Burdick 
> To: Elecraft Reflector ; 
> "elecraft...@yahoogroups.com" 
> Sent: Friday, February 13, 2015 1:07 AM
> Subject: [Elecraft] Upgraded K3 synthesizer module now available: The 
> KSYN3A
>
> The KSYN3A synthesizer module for the K3 is a completely new design 
> that improves on the original KSYN3 in several ways. All K3s shipped 
> on or after January 23, 2015 already include the new synthesizer 
> (serial number
> 8801 and later).
>
> See feature list below. Ordering and installation instructions can be 
> found here:
>
> http://www.elecraft.com/order_form_parts.htm#K3%20Parts
>
> * * *
>
> NOTE: If you wish to upgrade a K3 that includes the sub receiver 
> (KRX3), you'll need two (2) KSYN3A modules, since the synthesizers for 
> both receivers must be of the same type.
>
> * * *
>
> KSYN3A FEATURES:
>
> * FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING
>
> A dedicated coprocessor on the module permits faster transmit/receive 
> switching, improving CW timing accuracy with both internal and 
> external keying. This also speeds up receive recovery between elements.
>
> * ULTRA-LOW PHASE NOISE
>
> The KSYN3A significantly improves the K3's already excellent receive 
> and transmit phase noise characteristics at close carrier spacings. 
> This, in turn, improves its close-spaced receive dynamic range, 
> yielding even better weak signal detection in the presence of strong 
> signals. In transmit mode, the KSYN3A keeps the signal exceptionally 
> clean, further enhancing K3 performance at multi-transmitter stations, 
> Field Day and DXpeditions.
>
> * 600-METER COVERAGE
>
> The new synthesizer provides complete coverage of 600 meters -- and below.

> VFO tuning extends down to 100 kHz, with sensitivity gradually falling 
> off

> below 450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 
> dBm at the RX ANT IN jack. Transmit output of about 1.0 mW is 
> available for use with a suitable external amplifier. (Note: 600-m 
> allocations vary by country. Operation on this band requires the KBPF3 
> and KXV3 options. For receive-only use, an antenna can be connected to 
> the RX ANT IN jack on the

> KXV3 module. For transceive operation with an external amplifier, use 
> the XVTR IN and XVTR OUT jacks, and set CONFIG:KXV3 to TEST.)
>
> * EXCELLENT MECHANICAL STABILITY
>
> The KSYN3A is virtually immune to both physical vibration and magnetic 
> coupling, and operates over a very wide temperature range with no 
> change i

Re: [Elecraft] Further K3 development

Merv,

We have done our own tests of the I7SWX mixer, and while we saw some 
improvement in dynamic range, it came at the expense of worse MDS. The jury is 
still out. Our present mixer does an excellent job. 

73,
Wayne
N6KR


On Feb 13, 2015, at 9:47 AM, Merv Schweigert  wrote:

> How about a new mixer board?   Present one can be improved quite a bit with 
> some
> newer 50- cent chips like the FSA3157.with better specs than the I7SWX 
> mods
> and much less complicated,
> 
> Still some room to improve the K3,  so thanks Elecraft for working to keep it 
> up to date.
> 73 Merv K9FD/KH6



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[Elecraft] (no subject)

2015-02-13 Thread KURT RENNER

Test

- Original Message - 
From: elecraft-boun...@mailman.qth.net 

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Sent: Friday, February 13, 2015 9:57 AM

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Re: [Elecraft] Further K3 development

2015-02-13 Thread Merv Schweigert

I hope some side by side specs show up,  like I mentioned to upgrade for 
me would
be 800 bucks,  2 radios,  not going to do that without some solid proof 
of what I am

getting,   no complaints at all,  just like to see what I should expect.

How about a new mixer board?   Present one can be improved quite a bit 
with some
newer 50- cent chips like the FSA3157.with better specs than the 
I7SWX mods

and much less complicated,

Still some room to improve the K3,  so thanks Elecraft for working to 
keep it up to date.

73 Merv K9FD/KH6


Dear OMs,
  I will follow this thread for a while.   It would be nice to know more
about the performance enhancement as Johnny Siu has stated.

  What I am really chuffed about is that Wayne, Eric and company are
enhancing a radio which has been on the market perhaps seven years now.
Oh I like the modular design and construction and I love the company.

  The K3 is not being made obsolete but it is being updated right back to
SN 1 - My friend Brendan Minish, EI6IZ can update SN 42 and no doubt he
will.I will be contacting Brendan to see what he thinks.

   Good going guys, my loyalty is rewarded yet attain.   If I can be
jingoistic it is nice to see an American company performing in this manner.
The edge is not lost.   Great to see the engineering continue to evolve the
K3 - thank you.

  73 Doug EI2CN

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Terry
Hart
Sent: 13 February 2015 14:39
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available:
TheKSYN3A

---and I just received my K3 kit serial number 8795. I had no idea this was
coming up!
The extended receiver tuning down to 100KHz sounds
interestingwhat are the front-end filtering arrangements for that, I
wonder? And it would be interesting to see some comparative close-in phase
noise plots.

Terry G3VFO


- Original Message -
From: "Harry Yingst via Elecraft" 
To: "Wayne Burdick" ; "Elecraft Reflector"
; "elecraft...@yahoogroups.com"

Sent: Friday, February 13, 2015 1:17 PM
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The
KSYN3A



Dang, I just put the sub receiver in last week I should have waited



  From: Wayne Burdick 
To: Elecraft Reflector ;
"elecraft...@yahoogroups.com" 
Sent: Friday, February 13, 2015 1:07 AM
Subject: [Elecraft] Upgraded K3 synthesizer module now available: The
KSYN3A

The KSYN3A synthesizer module for the K3 is a completely new design that
improves on the original KSYN3 in several ways. All K3s shipped on or
after January 23, 2015 already include the new synthesizer (serial number
8801 and later).

See feature list below. Ordering and installation instructions can be
found here:

http://www.elecraft.com/order_form_parts.htm#K3%20Parts

* * *

NOTE: If you wish to upgrade a K3 that includes the sub receiver (KRX3),
you'll need two (2) KSYN3A modules, since the synthesizers for both
receivers must be of the same type.

* * *

KSYN3A FEATURES:

* FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING

A dedicated coprocessor on the module permits faster transmit/receive
switching, improving CW timing accuracy with both internal and external
keying. This also speeds up receive recovery between elements.

* ULTRA-LOW PHASE NOISE

The KSYN3A significantly improves the K3's already excellent receive and
transmit phase noise characteristics at close carrier spacings. This, in
turn, improves its close-spaced receive dynamic range, yielding even
better weak signal detection in the presence of strong signals. In
transmit mode, the KSYN3A keeps the signal exceptionally clean, further
enhancing K3 performance at multi-transmitter stations, Field Day and
DXpeditions.

* 600-METER COVERAGE

The new synthesizer provides complete coverage of 600 meters -- and below.
VFO tuning extends down to 100 kHz, with sensitivity gradually falling off
below 450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm
at the RX ANT IN jack. Transmit output of about 1.0 mW is available for
use with a suitable external amplifier. (Note: 600-m allocations vary by
country. Operation on this band requires the KBPF3 and KXV3 options. For
receive-only use, an antenna can be connected to the RX ANT IN jack on the
KXV3 module. For transceive operation with an external amplifier, use the
XVTR IN and XVTR OUT jacks, and set CONFIG:KXV3 to TEST.)

* EXCELLENT MECHANICAL STABILITY

The KSYN3A is virtually immune to both physical vibration and magnetic
coupling, and operates over a very wide temperature range with no change
in performance. K3 kit construction is simplified, as the KSYN3A requires
no alignment of any kind.

* * *

73,
Wayne
N6KR





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Re: [Elecraft] K3 KSYN3A Synthesizer Module Ordered


http://www.elecraft.com/order_form_parts.htm#K3%20Parts

On 2/13/15 9:32 AM, Jorge Diez - CX6VM wrote:

where´s the link of the KSYN3A?

thanks,
Jorge

2015-02-13 15:08 GMT-02:00 Phil Wheeler :


Same here, though I only need one. I do wonder if I'll notice the
difference -- but keeping my K3 at its best is a priority, so  .

Phil W7OX


On 2/13/15 8:15 AM, Bruce Osterberg wrote:


Good Morning:

Well Elecraft opened 14 minutes ago and I ordered two of the KSYN3A
Modules.  I am ready to give them a try in both the main and sub-receiver
of my K3.  looks like a fantastic upgrade!

Bruce N9BX 73


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Re: [Elecraft] K3 KSYN3A Synthesizer Module Ordered


Yes, Gary, Right! :-)

73, Phil W7OX

On 2/13/15 9:28 AM, Gary Smith wrote:

Me three, Just ordered two KSYN3A and a 2nd AM filter for diversity
while SWLing Broadcast stations and eventually operation on 600M. Now
to find an appropriate schematic & writeup on making a worthy amp for
600M that will utilize the 1.0 mW that the k3 will generate on that
frequency.

It's my thinking (like probably many here) that with my fully loaded
(except for the 2M module) K3, I have a top of the line radio that I
have invested much in already and I want it to stay this way. One of
the things I love about Elecraft is they keep raising the bar and
allowing the older K3 radios to be be brought up to 100% of the
current specs. About it a year ago I sent mine in for all the
available upgrades and updates. With all I have invested, it is to
me, a no-brainer to keep this rig as cutting edge as possible (It's
to my benefit, right?) AND... to help support the Elecraft industry.
I don't want to see Elecraft do anything but make a profit for many
reasons but among them, again, it's to my benefit, right?

73,

Gary
KA1J


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Re: [Elecraft] K3 KSYN3A Synthesizer Module Ordered

2015-02-13 Thread Jorge Diez - CX6VM

where´s the link of the KSYN3A?

thanks,
Jorge

2015-02-13 15:08 GMT-02:00 Phil Wheeler :

> Same here, though I only need one. I do wonder if I'll notice the
> difference -- but keeping my K3 at its best is a priority, so  .
>
> Phil W7OX
>
>
> On 2/13/15 8:15 AM, Bruce Osterberg wrote:
>
>> Good Morning:
>>
>> Well Elecraft opened 14 minutes ago and I ordered two of the KSYN3A
>> Modules.  I am ready to give them a try in both the main and sub-receiver
>> of my K3.  looks like a fantastic upgrade!
>>
>> Bruce N9BX 73
>>
>
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>



-- 
73,
Jorge
CX6VM/CW5W
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Re: [Elecraft] K3 KSYN3A Synthesizer Module Ordered

2015-02-13 Thread Gary Smith

Me three, Just ordered two KSYN3A and a 2nd AM filter for diversity 
while SWLing Broadcast stations and eventually operation on 600M. Now 
to find an appropriate schematic & writeup on making a worthy amp for 
600M that will utilize the 1.0 mW that the k3 will generate on that 
frequency.

It's my thinking (like probably many here) that with my fully loaded 
(except for the 2M module) K3, I have a top of the line radio that I 
have invested much in already and I want it to stay this way. One of 
the things I love about Elecraft is they keep raising the bar and 
allowing the older K3 radios to be be brought up to 100% of the 
current specs. About it a year ago I sent mine in for all the 
available upgrades and updates. With all I have invested, it is to 
me, a no-brainer to keep this rig as cutting edge as possible (It's 
to my benefit, right?) AND... to help support the Elecraft industry. 
I don't want to see Elecraft do anything but make a profit for many 
reasons but among them, again, it's to my benefit, right?

73,

Gary
KA1J 

> same here 2xKSYN3A ...gonne be shipped on Tue coz Monday is long weekend vy 
> 73 de VE3GNO Daniel
>   From: Bruce Osterberg 
>  To: elecraft@mailman.qth.net 
>  Sent: Friday, February 13, 2015 11:15 AM
>  Subject: [Elecraft] K3 KSYN3A Synthesizer Module Ordered
>
> Good Morning:
> 
> Well Elecraft opened 14 minutes ago and I ordered two of the KSYN3A 
> Modules.  I am ready to give them a try in both the main and 
> sub-receiver of my K3.  looks like a fantastic upgrade!
> 
> Bruce N9BX 73
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> 
>   
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Re: [Elecraft] K3 KSYN3A Synthesizer Module Ordered

Same here, though I only need one. I do wonder if 
I'll notice the difference -- but keeping my K3 at 
its best is a priority, so  .


Phil W7OX

On 2/13/15 8:15 AM, Bruce Osterberg wrote:

Good Morning:

Well Elecraft opened 14 minutes ago and I 
ordered two of the KSYN3A Modules.  I am ready 
to give them a try in both the main and 
sub-receiver of my K3.  looks like a fantastic 
upgrade!


Bruce N9BX 73


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Re: [Elecraft] K3 KSYN3A Synthesizer Module Ordered

same here 2xKSYN3A ...gonne be shipped on Tue coz Monday is long weekend vy 73 
de VE3GNO Daniel
  From: Bruce Osterberg 
 To: elecraft@mailman.qth.net 
 Sent: Friday, February 13, 2015 11:15 AM
 Subject: [Elecraft] K3 KSYN3A Synthesizer Module Ordered
   
Good Morning:

Well Elecraft opened 14 minutes ago and I ordered two of the KSYN3A 
Modules.  I am ready to give them a try in both the main and 
sub-receiver of my K3.  looks like a fantastic upgrade!

Bruce N9BX 73
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[Elecraft] Further K3 development

2015-02-13 Thread Doug Turnbull

Dear OMs,   
 I will follow this thread for a while.   It would be nice to know more
about the performance enhancement as Johnny Siu has stated.

 What I am really chuffed about is that Wayne, Eric and company are
enhancing a radio which has been on the market perhaps seven years now.
Oh I like the modular design and construction and I love the company.

 The K3 is not being made obsolete but it is being updated right back to
SN 1 - My friend Brendan Minish, EI6IZ can update SN 42 and no doubt he
will.I will be contacting Brendan to see what he thinks.

  Good going guys, my loyalty is rewarded yet attain.   If I can be
jingoistic it is nice to see an American company performing in this manner.
The edge is not lost.   Great to see the engineering continue to evolve the
K3 - thank you.

 73 Doug EI2CN 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Terry
Hart
Sent: 13 February 2015 14:39
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available:
TheKSYN3A

---and I just received my K3 kit serial number 8795. I had no idea this was
coming up!
The extended receiver tuning down to 100KHz sounds
interestingwhat are the front-end filtering arrangements for that, I
wonder? And it would be interesting to see some comparative close-in phase 
noise plots.

Terry G3VFO


- Original Message - 
From: "Harry Yingst via Elecraft" 
To: "Wayne Burdick" ; "Elecraft Reflector" 
; "elecraft...@yahoogroups.com" 

Sent: Friday, February 13, 2015 1:17 PM
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The 
KSYN3A


> Dang, I just put the sub receiver in last week I should have waited
>
>
>
>  From: Wayne Burdick 
> To: Elecraft Reflector ; 
> "elecraft...@yahoogroups.com" 
> Sent: Friday, February 13, 2015 1:07 AM
> Subject: [Elecraft] Upgraded K3 synthesizer module now available: The 
> KSYN3A
>
> The KSYN3A synthesizer module for the K3 is a completely new design that 
> improves on the original KSYN3 in several ways. All K3s shipped on or 
> after January 23, 2015 already include the new synthesizer (serial number 
> 8801 and later).
>
> See feature list below. Ordering and installation instructions can be 
> found here:
>
> http://www.elecraft.com/order_form_parts.htm#K3%20Parts
>
> * * *
>
> NOTE: If you wish to upgrade a K3 that includes the sub receiver (KRX3), 
> you'll need two (2) KSYN3A modules, since the synthesizers for both 
> receivers must be of the same type.
>
> * * *
>
> KSYN3A FEATURES:
>
> * FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING
>
> A dedicated coprocessor on the module permits faster transmit/receive 
> switching, improving CW timing accuracy with both internal and external 
> keying. This also speeds up receive recovery between elements.
>
> * ULTRA-LOW PHASE NOISE
>
> The KSYN3A significantly improves the K3's already excellent receive and 
> transmit phase noise characteristics at close carrier spacings. This, in 
> turn, improves its close-spaced receive dynamic range, yielding even 
> better weak signal detection in the presence of strong signals. In 
> transmit mode, the KSYN3A keeps the signal exceptionally clean, further 
> enhancing K3 performance at multi-transmitter stations, Field Day and 
> DXpeditions.
>
> * 600-METER COVERAGE
>
> The new synthesizer provides complete coverage of 600 meters -- and below.

> VFO tuning extends down to 100 kHz, with sensitivity gradually falling off

> below 450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm 
> at the RX ANT IN jack. Transmit output of about 1.0 mW is available for 
> use with a suitable external amplifier. (Note: 600-m allocations vary by 
> country. Operation on this band requires the KBPF3 and KXV3 options. For 
> receive-only use, an antenna can be connected to the RX ANT IN jack on the

> KXV3 module. For transceive operation with an external amplifier, use the 
> XVTR IN and XVTR OUT jacks, and set CONFIG:KXV3 to TEST.)
>
> * EXCELLENT MECHANICAL STABILITY
>
> The KSYN3A is virtually immune to both physical vibration and magnetic 
> coupling, and operates over a very wide temperature range with no change 
> in performance. K3 kit construction is simplified, as the KSYN3A requires 
> no alignment of any kind.
>
> * * *
>
> 73,
> Wayne
> N6KR
>
>
>
>
>
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[Elecraft] K3 KSYN3A Synthesizer Module Ordered

2015-02-13 Thread Bruce Osterberg


Good Morning:

Well Elecraft opened 14 minutes ago and I ordered two of the KSYN3A 
Modules.  I am ready to give them a try in both the main and 
sub-receiver of my K3.  looks like a fantastic upgrade!


Bruce N9BX 73
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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

so no more phase noise limitation in DR and IMD?...that's gonna be fun, coz now 
there is a lot of buzz with new 7850 super low noise LO, so 200 bucks update K3 
is gonna stay shoulder to shoulder with a 10k limited quantity radio...so here 
is my bet...won't wait for test results and gonna order 2day...

vy 73 de VE3GNO Daniel
  From: Johnny Siu 
 To: Wayne Burdick ; Elecraft Reflector 
; "elecraft...@yahoogroups.com" 

 Sent: Friday, February 13, 2015 9:42 AM
 Subject: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

Hello Wayne,
It is good to see improvement in RX phase noise which will affect the 
reciprocal noise mixing.
Could you put the improvement in layman terms?  For example, in the original 
KSYN3, a weak CW signal could be heard 10Khz away from a S9+60db signal, under 
the new KSYN3A, what improvement can I expect?  Will it be now heard 1Khz away 
from the S9+60db signal?
It would be better for you to give examples in this way so that for a non-radio 
profession like me, can understand the improvements.
73
Johnny VR2XMC 
      寄件人︰ Wayne Burdick 
 收件人︰ Elecraft Reflector ; 
"elecraft...@yahoogroups.com"  
 傳送日期︰ 2015年02月13日 (週五) 2:07 PM
 主題︰ [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

The KSYN3A synthesizer module for the K3 is a completely new design that 
improves on the original KSYN3 in several ways. All K3s shipped on or after 
January 23, 2015 already include the new synthesizer (serial number 8801 and 
later).

See feature list below. Ordering and installation instructions can be found 
here:

    http://www.elecraft.com/order_form_parts.htm#K3%20Parts

* * *

NOTE:  If you wish to upgrade a K3 that includes the sub receiver (KRX3), 
you'll need two (2) KSYN3A modules, since the synthesizers for both receivers 
must be of the same type.

* * *

KSYN3A FEATURES:

* FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING 

A dedicated coprocessor on the module permits faster transmit/receive 
switching, improving CW timing accuracy with both internal and external keying. 
This also speeds up receive recovery between elements.

* ULTRA-LOW PHASE NOISE

The KSYN3A significantly improves the K3's already excellent receive and 
transmit phase noise characteristics at close carrier spacings. This, in turn, 
improves its close-spaced receive dynamic range, yielding even better weak 
signal detection in the presence of strong signals. In transmit mode, the 
KSYN3A keeps the signal exceptionally clean, further enhancing K3 performance 
at multi-transmitter stations, Field Day and DXpeditions. 

* 600-METER COVERAGE

The new synthesizer provides complete coverage of 600 meters -- and below. VFO 
tuning extends down to 100 kHz, with sensitivity gradually falling off below 
450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm at the RX 
ANT IN jack. Transmit output of about 1.0 mW is available for use with a 
suitable external amplifier. (Note: 600-m allocations vary by country. 
Operation on this band requires the KBPF3 and KXV3 options. For receive-only 
use, an antenna can be connected to the RX ANT IN jack on the KXV3 module. For 
transceive operation with an external amplifier, use the XVTR IN and XVTR OUT 
jacks, and set CONFIG:KXV3 to TEST.)

* EXCELLENT MECHANICAL STABILITY

The KSYN3A is virtually immune to both physical vibration and magnetic 
coupling, and operates over a very wide temperature range with no change in 
performance. K3 kit construction is simplified, as the KSYN3A requires no 
alignment of any kind.

* * *

73,
Wayne
N6KR

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[Elecraft] New K3 Synthesizer

2015-02-13 Thread Bob Locher

Wayne - thanks - news of the new K3 Synthesizer is very exciting! And I 
will be very interested in the Sherwood testing  of the K3 with the new 
board.


Question: how hard is it to install it in the K3? And how hard to 
install in the sub receiver?


You say a K3 with Sub-receiver needs both to have the new board. Is this 
only so that dual diversity reception capability is retained? Do both 
receivers need the new synthesizers  if the user does not use 
dual-diversity?


Anyhow, it is a wonderful thing that Elecraft is offering such an 
improvement for units in the field.  I am aware of no other transceiver 
supplier offering a major upgrade for units already in the field. 
Elecraft's willingness to do this and its loyalty to its customers is 
unmatched!


What a wonderful gift for us K-3 owners!

Cheers/73

Bob Locher W9KNI

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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

I have the KBPF3 in both my Mani and Sub Receivers so I'm hoping they will go 
down to 100KHz
I also wish I had known about this because it's something I've wanted for a 
long time (to be able to Receive LF)



  From: Terry Hart 
 To: elecraft@mailman.qth.net 
 Sent: Friday, February 13, 2015 9:39 AM
 Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The 
KSYN3A
   
---and I just received my K3 kit serial number 8795. I had no idea this was
coming up!
The extended receiver tuning down to 100KHz sounds
interestingwhat are the front-end filtering arrangements for that, I
wonder? And it would be interesting to see some comparative close-in phase 
noise plots.

Terry G3VFO


- Original Message - 
From: "Harry Yingst via Elecraft" 
To: "Wayne Burdick" ; "Elecraft Reflector" 
; "elecraft...@yahoogroups.com" 

Sent: Friday, February 13, 2015 1:17 PM
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The 
KSYN3A


> Dang, I just put the sub receiver in last week I should have waited
>
>
>
>      From: Wayne Burdick 
> To: Elecraft Reflector ; 
> "elecraft...@yahoogroups.com" 
> Sent: Friday, February 13, 2015 1:07 AM
> Subject: [Elecraft] Upgraded K3 synthesizer module now available: The 
> KSYN3A
>
> The KSYN3A synthesizer module for the K3 is a completely new design that 
> improves on the original KSYN3 in several ways. All K3s shipped on or 
> after January 23, 2015 already include the new synthesizer (serial number 
> 8801 and later).
>
> See feature list below. Ordering and installation instructions can be 
> found here:
>
> http://www.elecraft.com/order_form_parts.htm#K3%20Parts
>
> * * *
>
> NOTE: If you wish to upgrade a K3 that includes the sub receiver (KRX3), 
> you'll need two (2) KSYN3A modules, since the synthesizers for both 
> receivers must be of the same type.
>
> * * *
>
> KSYN3A FEATURES:
>
> * FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING
>
> A dedicated coprocessor on the module permits faster transmit/receive 
> switching, improving CW timing accuracy with both internal and external 
> keying. This also speeds up receive recovery between elements.
>
> * ULTRA-LOW PHASE NOISE
>
> The KSYN3A significantly improves the K3's already excellent receive and 
> transmit phase noise characteristics at close carrier spacings. This, in 
> turn, improves its close-spaced receive dynamic range, yielding even 
> better weak signal detection in the presence of strong signals. In 
> transmit mode, the KSYN3A keeps the signal exceptionally clean, further 
> enhancing K3 performance at multi-transmitter stations, Field Day and 
> DXpeditions.
>
> * 600-METER COVERAGE
>
> The new synthesizer provides complete coverage of 600 meters -- and below. 
> VFO tuning extends down to 100 kHz, with sensitivity gradually falling off 
> below 450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm 
> at the RX ANT IN jack. Transmit output of about 1.0 mW is available for 
> use with a suitable external amplifier. (Note: 600-m allocations vary by 
> country. Operation on this band requires the KBPF3 and KXV3 options. For 
> receive-only use, an antenna can be connected to the RX ANT IN jack on the 
> KXV3 module. For transceive operation with an external amplifier, use the 
> XVTR IN and XVTR OUT jacks, and set CONFIG:KXV3 to TEST.)
>
> * EXCELLENT MECHANICAL STABILITY
>
> The KSYN3A is virtually immune to both physical vibration and magnetic 
> coupling, and operates over a very wide temperature range with no change 
> in performance. K3 kit construction is simplified, as the KSYN3A requires 
> no alignment of any kind.
>
> * * *
>
> 73,
> Wayne
> N6KR
>
>
>
>
>
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Re: [Elecraft] #WorldRadioDay

2015-02-13 Thread Kenneth Talbott

I did.  Then I looked at the other posts and quickly deleted mine.

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David
Ahrendts
Sent: Friday, February 13, 2015 8:50 AM
To: Elecraft Reflector
Subject: [Elecraft] #WorldRadioDay

If ya Twitter, it is this very day: World Radio Day. Put a pix of your
ELECRAFT rig on Twitter, hash tag WorldRadioDay.



David Ahrendts   davidahren...@me.com   




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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

The extension of operation to 100-KHz is a terrific addition for 
those of us using the 600m band.  FCC approval for experimental 
licensed stations on 472-478 KHz has seen a major move of activity to 
this new sub-band which left users of the K3 out (the old lower limit 
of 490-KHz).


I will have to save up as I have the KRX3, so the cost is double.

Also will be interesting to see if the lower phase noise will improve 
weak-signal detection threshold on digital modes (e.g. JT65).


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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[Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

Hello Wayne,
It is good to see improvement in RX phase noise which will affect the 
reciprocal noise mixing.
Could you put the improvement in layman terms?  For example, in the original 
KSYN3, a weak CW signal could be heard 10Khz away from a S9+60db signal, under 
the new KSYN3A, what improvement can I expect?  Will it be now heard 1Khz away 
from the S9+60db signal?
It would be better for you to give examples in this way so that for a non-radio 
profession like me, can understand the improvements.
73
Johnny VR2XMC 
  寄件人︰ Wayne Burdick 
 收件人︰ Elecraft Reflector ; 
"elecraft...@yahoogroups.com"  
 傳送日期︰ 2015年02月13日 (週五) 2:07 PM
 主題︰ [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A
   
The KSYN3A synthesizer module for the K3 is a completely new design that 
improves on the original KSYN3 in several ways. All K3s shipped on or after 
January 23, 2015 already include the new synthesizer (serial number 8801 and 
later).

See feature list below. Ordering and installation instructions can be found 
here:

    http://www.elecraft.com/order_form_parts.htm#K3%20Parts

* * *

NOTE:  If you wish to upgrade a K3 that includes the sub receiver (KRX3), 
you'll need two (2) KSYN3A modules, since the synthesizers for both receivers 
must be of the same type.

* * *

KSYN3A FEATURES:

* FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING 

A dedicated coprocessor on the module permits faster transmit/receive 
switching, improving CW timing accuracy with both internal and external keying. 
This also speeds up receive recovery between elements.

* ULTRA-LOW PHASE NOISE

The KSYN3A significantly improves the K3's already excellent receive and 
transmit phase noise characteristics at close carrier spacings. This, in turn, 
improves its close-spaced receive dynamic range, yielding even better weak 
signal detection in the presence of strong signals. In transmit mode, the 
KSYN3A keeps the signal exceptionally clean, further enhancing K3 performance 
at multi-transmitter stations, Field Day and DXpeditions. 

* 600-METER COVERAGE

The new synthesizer provides complete coverage of 600 meters -- and below. VFO 
tuning extends down to 100 kHz, with sensitivity gradually falling off below 
450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm at the RX 
ANT IN jack. Transmit output of about 1.0 mW is available for use with a 
suitable external amplifier. (Note: 600-m allocations vary by country. 
Operation on this band requires the KBPF3 and KXV3 options. For receive-only 
use, an antenna can be connected to the RX ANT IN jack on the KXV3 module. For 
transceive operation with an external amplifier, use the XVTR IN and XVTR OUT 
jacks, and set CONFIG:KXV3 to TEST.)

* EXCELLENT MECHANICAL STABILITY

The KSYN3A is virtually immune to both physical vibration and magnetic 
coupling, and operates over a very wide temperature range with no change in 
performance. K3 kit construction is simplified, as the KSYN3A requires no 
alignment of any kind.

* * *

73,
Wayne
N6KR





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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

2015-02-13 Thread Terry Hart


---and I just received my K3 kit serial number 8795. I had no idea this was
coming up!
The extended receiver tuning down to 100KHz sounds
interestingwhat are the front-end filtering arrangements for that, I
wonder? And it would be interesting to see some comparative close-in phase 
noise plots.


Terry G3VFO


- Original Message - 
From: "Harry Yingst via Elecraft" 
To: "Wayne Burdick" ; "Elecraft Reflector" 
; "elecraft...@yahoogroups.com" 


Sent: Friday, February 13, 2015 1:17 PM
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The 
KSYN3A




Dang, I just put the sub receiver in last week I should have waited



 From: Wayne Burdick 
To: Elecraft Reflector ; 
"elecraft...@yahoogroups.com" 

Sent: Friday, February 13, 2015 1:07 AM
Subject: [Elecraft] Upgraded K3 synthesizer module now available: The 
KSYN3A


The KSYN3A synthesizer module for the K3 is a completely new design that 
improves on the original KSYN3 in several ways. All K3s shipped on or 
after January 23, 2015 already include the new synthesizer (serial number 
8801 and later).


See feature list below. Ordering and installation instructions can be 
found here:


http://www.elecraft.com/order_form_parts.htm#K3%20Parts

* * *

NOTE: If you wish to upgrade a K3 that includes the sub receiver (KRX3), 
you'll need two (2) KSYN3A modules, since the synthesizers for both 
receivers must be of the same type.


* * *

KSYN3A FEATURES:

* FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING

A dedicated coprocessor on the module permits faster transmit/receive 
switching, improving CW timing accuracy with both internal and external 
keying. This also speeds up receive recovery between elements.


* ULTRA-LOW PHASE NOISE

The KSYN3A significantly improves the K3's already excellent receive and 
transmit phase noise characteristics at close carrier spacings. This, in 
turn, improves its close-spaced receive dynamic range, yielding even 
better weak signal detection in the presence of strong signals. In 
transmit mode, the KSYN3A keeps the signal exceptionally clean, further 
enhancing K3 performance at multi-transmitter stations, Field Day and 
DXpeditions.


* 600-METER COVERAGE

The new synthesizer provides complete coverage of 600 meters -- and below. 
VFO tuning extends down to 100 kHz, with sensitivity gradually falling off 
below 450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm 
at the RX ANT IN jack. Transmit output of about 1.0 mW is available for 
use with a suitable external amplifier. (Note: 600-m allocations vary by 
country. Operation on this band requires the KBPF3 and KXV3 options. For 
receive-only use, an antenna can be connected to the RX ANT IN jack on the 
KXV3 module. For transceive operation with an external amplifier, use the 
XVTR IN and XVTR OUT jacks, and set CONFIG:KXV3 to TEST.)


* EXCELLENT MECHANICAL STABILITY

The KSYN3A is virtually immune to both physical vibration and magnetic 
coupling, and operates over a very wide temperature range with no change 
in performance. K3 kit construction is simplified, as the KSYN3A requires 
no alignment of any kind.


* * *

73,
Wayne
N6KR





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Re: [Elecraft] SWR

2015-02-13 Thread Wes (N7WS)

I guess it's semantics.  If an undesired output event causes a corrective action 
to be taken in a previous stage isn't this a closed loop?  I believe it is, even 
if it's a "man-in-the-loop" system, i.e. I see on the oscilloscope that I'm flat 
topping so I turn the audio gain down to correct it.


On 2/12/2015 9:59 PM, Don Wilhelm wrote:

Wes,

An analog open loop ALC is one in which the drive is reduced in response to an 
overload condition (high SWR, power level that exceeds the maximum set 
level).  The response is applied only after the offending condition occurs - 
that is an open loop system.
With the K3, KX3 and K2 power control system being a closed loop system, that 
condition does not exist.  The overshoot possibility is detected early and the 
power is reduced accordingly without PA overshoot and the PA going into a 
distortion region.


If you have any understanding about closed loop control systems, you will then 
understand 'damping' conditions.  Underdamped systems will oscillate near the 
'set point' while overdamped systems will never come up to the set point.  
Critically damped systems will quickly settle to the set point and maintain 
the proper condition (power level, temperature, you 'name it' condition).  In 
the case in point, the power level is the 'set point' that is considered.  An 
open loop system is totally undamped and will only respond 'after the fact' to 
conditions that exceed certain thresholds.  Closed loop systems approach those 
thresholds with actions that will result in critical damping of the response 
mechanism.


73,
Don W3FPR



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[Elecraft] #WorldRadioDay

2015-02-13 Thread David Ahrendts

If ya Twitter, it is this very day: World Radio Day. Put a pix of your ELECRAFT 
rig on Twitter, hash tag WorldRadioDay.



David Ahrendts   davidahren...@me.com   




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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

What makes this desirable to me (If I'm reading this right) is the ability to 
be able to receive down to 100KHz.
I've been working on designing a RX (and possible TX) converter so this is very 
desirable to me.





  From: Wayne Burdick 
 To: Elecraft Reflector ; 
"elecraft...@yahoogroups.com"  
 Sent: Friday, February 13, 2015 1:07 AM
 Subject: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A
   
The KSYN3A synthesizer module for the K3 is a completely new design that 
improves on the original KSYN3 in several ways. All K3s shipped on or after 
January 23, 2015 already include the new synthesizer (serial number 8801 and 
later).

See feature list below. Ordering and installation instructions can be found 
here:

    http://www.elecraft.com/order_form_parts.htm#K3%20Parts


  
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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

2015-02-13 Thread Mike Reublin NF4L

Barry -
>From Wayne's post...

See feature list below. Ordering and installation instructions can be found 
here:

   http://www.elecraft.com/order_form_parts.htm#K3%20Parts

773, Mike NF4L
> On Feb 13, 2015, at 7:52 AM, Barry  wrote:
> 
> Wat is involved, technically in performing the upgrade - is it simply
> swapping out a board?
> Barry W2UP
> 
> 
> 
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/Upgraded-K3-synthesizer-module-now-available-The-KSYN3A-tp7598267p7598270.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

Dang, I just put the sub receiver in last week I should have waited

  From: Wayne Burdick 
 To: Elecraft Reflector ; 
"elecraft...@yahoogroups.com"  
 Sent: Friday, February 13, 2015 1:07 AM
 Subject: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

The KSYN3A synthesizer module for the K3 is a completely new design that 
improves on the original KSYN3 in several ways. All K3s shipped on or after 
January 23, 2015 already include the new synthesizer (serial number 8801 and 
later).

See feature list below. Ordering and installation instructions can be found 
here:

    http://www.elecraft.com/order_form_parts.htm#K3%20Parts

* * *

NOTE:  If you wish to upgrade a K3 that includes the sub receiver (KRX3), 
you'll need two (2) KSYN3A modules, since the synthesizers for both receivers 
must be of the same type.

* * *

KSYN3A FEATURES:

* FASTER CW BREAK-IN AND MORE ACCURATE CW TIMING 

A dedicated coprocessor on the module permits faster transmit/receive 
switching, improving CW timing accuracy with both internal and external keying. 
This also speeds up receive recovery between elements.

* ULTRA-LOW PHASE NOISE

The KSYN3A significantly improves the K3's already excellent receive and 
transmit phase noise characteristics at close carrier spacings. This, in turn, 
improves its close-spaced receive dynamic range, yielding even better weak 
signal detection in the presence of strong signals. In transmit mode, the 
KSYN3A keeps the signal exceptionally clean, further enhancing K3 performance 
at multi-transmitter stations, Field Day and DXpeditions. 

* 600-METER COVERAGE

The new synthesizer provides complete coverage of 600 meters -- and below. VFO 
tuning extends down to 100 kHz, with sensitivity gradually falling off below 
450 kHz. Receive sensitivity (MDS) at 475 kHz is typically -120 dBm at the RX 
ANT IN jack. Transmit output of about 1.0 mW is available for use with a 
suitable external amplifier. (Note: 600-m allocations vary by country. 
Operation on this band requires the KBPF3 and KXV3 options. For receive-only 
use, an antenna can be connected to the RX ANT IN jack on the KXV3 module. For 
transceive operation with an external amplifier, use the XVTR IN and XVTR OUT 
jacks, and set CONFIG:KXV3 to TEST.)

* EXCELLENT MECHANICAL STABILITY

The KSYN3A is virtually immune to both physical vibration and magnetic 
coupling, and operates over a very wide temperature range with no change in 
performance. K3 kit construction is simplified, as the KSYN3A requires no 
alignment of any kind.

* * *

73,
Wayne
N6KR

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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

2015-02-13 Thread k2ttt

Is it worth the $400 bucks?
K2TTT


Sent from my Verizon Wireless 4G LTE smartphone


 Original message 
From: Barry  
Date:02/13/2015  7:52 AM  (GMT-05:00) 
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] Upgraded K3 synthesizer module now available: The   
KSYN3A 

Wat is involved, technically in performing the upgrade - is it simply
swapping out a board?
Barry W2UP



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/Upgraded-K3-synthesizer-module-now-available-The-KSYN3A-tp7598267p7598270.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

2015-02-13 Thread Barry

Wat is involved, technically in performing the upgrade - is it simply
swapping out a board?
Barry W2UP



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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A

2015-02-13 Thread Arie Kleingeld PA3A


Wayne,

That sounds interesting. Before investing in two modules I'd like to 
know how much the dynamic range will change. Could you share some 
relevant measurements?


73
Arie PA3A


Wayne Burdick schreef op 13-2-2015 om 7:07:


* ULTRA-LOW PHASE NOISE

The KSYN3A significantly improves the K3's already excellent receive and 
transmit phase noise characteristics at close carrier spacings. This, in turn, 
improves its close-spaced receive dynamic range, yielding even better weak 
signal detection in the presence of strong signals. In transmit mode, the 
KSYN3A keeps the signal exceptionally clean, further enhancing K3 performance 
at multi-transmitter stations, Field Day and DXpeditions.



73,
Wayne
N6KR



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Re: [Elecraft] Upgraded K3 synthesizer module now available: The KSYN3A