Re: [Elecraft] After Rob Sherwood's Talk at Dayton

2013-06-09 Thread Fred Smith
OMG FREE HAT!!! Welcome to a group of proud radio owners and great service
for a great company.


73,
Fred/N0AZZ
K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100
P3/SVGA--KPA500--KAT500--W2



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Chris Pinholster
Sent: Saturday, June 08, 2013 10:29 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] After Rob Sherwood's Talk at Dayton

Hello to the fine folks on this reflector:

I am a new Elecraft K3 owner, I received mine yesterday. I made my decision
right after I heard Sherwood speak in the Drake forum at Dayton.
He gave high praise to the K3, and I thought gave short thrift to the Orion
565, which I owned. After the forum was over, I approached Sherwood, asked
him about his Orion remarks and the comparison to the K3. He answered me
politely and directly. He was exactly right about the Orion. The encounter
with Rob convinced me.

I went directly to the Elecraft booth and ordered my K3 and P3 combo. 
I had been reading for some time about the great treatment owners receive
from Elecraft. (I got the free hat) and I look forward to a long
relationship with Elecraft.

My Orion will be up for sale shortly, along with a few other radios to
lessen the economic blow.
Regards,

Chris
k4...@mac.com

P.S. I'm keeping most of my Drake gear. (I like old toys too)




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Re: [Elecraft] After Rob Sherwood's Talk at Dayton

2013-06-09 Thread Bill W4ZV
Chris Pinholster wrote
 I am a new Elecraft K3 owner, I received mine yesterday. I made my
 decision right after I heard Sherwood speak in the Drake forum at Dayton.
 He gave high praise to the K3, and I thought gave short thrift to the
 Orion 565, which I owned. After the forum was over, I approached Sherwood,
 asked him about his Orion remarks and
 the comparison to the K3. He answered me politely and directly. He was
 exactly right about the Orion. The encounter with Rob convinced me.

When Orion was first introduced in 2003 it was the best performing radio
available.  Unfortunately Ten-Tec management then went through a dry spell
with uncharacteristically poor responsiveness and firmware support.  Since
John Henry took over engineering a few years ago, Ten-Tec has turned around
and done several good things to refresh Orion including a really good Sub-RX
instead of the poor one in the original unit.

IMHO Orion remains one of the better rigs available today.  There are still
some things about it I miss (such as the flexible antenna selection
matrix...not possible in the K3 due to limited front panel space).

The moral to this story for any company is to always maintain responsiveness
to customer input.  So far that remains one of Elecraft's stellar strengths.

73,  Bill  W4ZV




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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Bill W4ZV
Bill K9YEQ wrote
 Glad I never discussed the same issue with the wife when I bought the K2. 
 I
 now own the K3 and KX3.  The K2 is my hearty backup in case of issues.

The K2/10 remains a very capable rig for portable use and SOTA activating. 
While the KX3 has several advantages including weight and size, I've not yet
been compelled to get one.  If I really want light weight (3 ounces) and
small size (Altoids tin), I take my ATS-3. 

Part of my love for the K2 is from building it myself in 2004...it might be
for sale after I leave planet Earth.  Here's a little story about SOTA
activating using the K2 in the recent QRPTTF event:

http://www.uwharrieqrp.com/2013/04/qrpttf-and-rocky-knob-w4cem-047.html

73,  Bill  W4ZV

 




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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Fred Smith
I have all 3 radios a K2/K3/KX3 the K2 was pretty much set aside when the K3
came home to me. Everything the K2 did the K3 did much better from QRP up
and all modes I loved the radio and for a while the K2 sat till I decided to
use it again for QRP. It is a keeper because I built it and built and
rebuilt it till it finally worked fine with some help from Don.

That was the case till I decided to buy the KX3 with all options at 1/4 the
size of the K2. It blew my K2 away with all it had packed into such a small
package and the really great receiver. Again the K2 was not being used for
months till I loaned to a new ham to use that I knew for a month or so (now
a Elecraft K3 owner) as of last week.

When I got it back I decided to make better use of the radios that I own and
that the K2 would be devoted to digital modes only. JT65HF/JT-9/PSK/RTTY is
where most all the traffic is at any more so why not take advantage of them
with a dedicated radio/computer have 3 in the shack.

It seems most all of my contacts in the last couple of months have been QRP
my amps haven't even been turned on.


73,
Fred/N0AZZ
K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100
P3/SVGA--KPA500--KAT500--W2




-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill W4ZV
Sent: Sunday, June 09, 2013 5:22 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

Bill K9YEQ wrote
 Glad I never discussed the same issue with the wife when I bought the K2. 
 I
 now own the K3 and KX3.  The K2 is my hearty backup in case of issues.

The K2/10 remains a very capable rig for portable use and SOTA activating. 
While the KX3 has several advantages including weight and size, I've not yet
been compelled to get one.  If I really want light weight (3 ounces) and
small size (Altoids tin), I take my ATS-3. 

Part of my love for the K2 is from building it myself in 2004...it might be
for sale after I leave planet Earth.  Here's a little story about SOTA
activating using the K2 in the recent QRPTTF event:

http://www.uwharrieqrp.com/2013/04/qrpttf-and-rocky-knob-w4cem-047.html

73,  Bill  W4ZV

 




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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Fred Jensen

Is a KX3 REALLY 1/4 the size of a K2?


On 6/9/2013 3:54 AM, Fred Smith wrote:


That was the case till I decided to buy the KX3 with all options at 1/4 the
size of the K2. It blew my K2 away with all it had packed into such a small
package and the really great receiver. Again the K2 was not being used for
months till I loaned to a new ham to use that I knew for a month or so (now
a Elecraft K3 owner) as of last week.



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Don Wilhelm

Actually it is a bit less than 1/4 the volume of the K2.
The Front Panel is about 1/2 inch less in length and about 3/16 inch 
greater in height (width for the KX3).

The K2 is 8.5 inches deep, and the KX3 is a bit less than 1.75 inches deep.

73,
Don W3FPR

On 6/9/2013 3:18 PM, Fred Jensen wrote:

Is a KX3 REALLY 1/4 the size of a K2?


On 6/9/2013 3:54 AM, Fred Smith wrote:

That was the case till I decided to buy the KX3 with all options at 
1/4 the
size of the K2. It blew my K2 away with all it had packed into such a 
small
package and the really great receiver. Again the K2 was not being 
used for
months till I loaned to a new ham to use that I knew for a month or 
so (now

a Elecraft K3 owner) as of last week.



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Fred Smith
Yes very close.

73,
Fred/N0AZZ

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen
Sent: Sunday, June 09, 2013 2:19 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

Is a KX3 REALLY 1/4 the size of a K2?


On 6/9/2013 3:54 AM, Fred Smith wrote:

 That was the case till I decided to buy the KX3 with all options at 
 1/4 the size of the K2. It blew my K2 away with all it had packed into 
 such a small package and the really great receiver. Again the K2 was 
 not being used for months till I loaned to a new ham to use that I 
 knew for a month or so (now a Elecraft K3 owner) as of last week.


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No virus found in this message.
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Version: 2012.0.2242 / Virus Database: 3199/5894 - Release Date: 06/08/13

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Edward R Cole

Hey, Don.

I like the sound of my old 1950's metal National Speaker.  True is 
has a bit more bass than needed but the K3 sounds much mellower than 
the internal speaker.  For really tough to hear signals I use 
headphones, anyway.  I eventually will replace the cheap HK computer 
speakers used with my KX3 with probably the West Mountain comm 
speaker (immune to RFI).


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


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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Mike Harris
However, this needs expansion.  The QRP K2 and the QRO K2 are the same 
size.  The QRP KX3 is small as described but to make it QRO by adding 
the 100W amp it will probably be a close comparison. Comments on the 
list indicate that the amp is not tiny.


With respect to features, that's altogether another story.

Regards,

Mike VP8NO
K2 #1400
K3 #345

On 09/06/2013 17:59, Fred Smith wrote:

Yes very close.

73,
Fred/N0AZZ

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen
Sent: Sunday, June 09, 2013 2:19 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

Is a KX3 REALLY 1/4 the size of a K2?


On 6/9/2013 3:54 AM, Fred Smith wrote:


That was the case till I decided to buy the KX3 with all options at
1/4 the size of the K2. It blew my K2 away with all it had packed into
such a small package and the really great receiver. Again the K2 was
not being used for months till I loaned to a new ham to use that I
knew for a month or so (now a Elecraft K3 owner) as of last week.

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Mark Petiford
...and I love the sound of the speaker for my old 1947 RME 45 receiver, but its 
steel cabinet is over 60 times the size (volume) of my KX3, and weighs at least 
10 times more, so I just can't see using it with the KX3. ;-)

Mark
KE6BB




 From: Edward R Cole kl...@acsalaska.net
To: Elecraft@mailman.qth.net 
Sent: Sunday, June 9, 2013 2:25 PM
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton
 

Hey, Don.

I like the sound of my old 1950's metal National Speaker.  True is 
has a bit more bass than needed but the K3 sounds much mellower than 
the internal speaker.  For really tough to hear signals I use 
headphones, anyway.  I eventually will replace the cheap HK computer 
speakers used with my KX3 with probably the West Mountain comm 
speaker (immune to RFI).

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

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-09 Thread Fred Jensen

On 6/9/2013 3:06 PM, Mark Petiford wrote:

...and I love the sound of the speaker for my old 1947 RME 45
receiver, but its steel cabinet is over 60 times the size (volume) of
my KX3, and weighs at least 10 times more, so I just can't see using
it with the KX3. ;-)


Prior to getting the SX-28 at 15, I had an RME45.  Both were very good 
protection against gravity outages.  Although I've solved the problem 
now, for quite awhile I had a real problem with my K3 and P3 being too 
light ... tapping and holding pushed them rather than the buttons 
around.  How time changes things!


73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Edward R Cole

I agree with Fred and with Elecraft's position on product support.

When I went hat in hand to appeal with my wife to agree to spend 
roughly $3K for a new ham radio, it was with the understanding that 
it was the last (major) ham purchase I would make.  The continuous 
improvement and support of the K3 make it possible for me to keep 
that promise, as I see the radio evolving for  long time.


This is the promise that SDR makes (but only Elecraft actually 
does).  I did squeak out buying the KX3, but the cost was largely 
offset by the sale of my Yaesu radios (FT-847  FT-817).


Already several firmware improvements for the KX3, as well as the 
K3.  How could you not like that (rhetorical question)?


73, Ed - KL7UW
BTW when I bought the K3, I also paid off my wife's new Toyota Van 
loan (me no dummy).



---
Date: Fri, 7 Jun 2013 12:13:48 -0500
From: Fred Smith m...@totalhighspeed.com
To: 'Wayne Burdick' n...@elecraft.com,  'Keith-K5ENS'
ke...@kathyandkeith.mx
Cc: 'Elecraft Reflector' elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton
Message-ID: 002901ce63a2$60751260$215f3720$@com
Content-Type: text/plain;   charset=us-ascii

Yup, Yup and Yup that's the reason I have Elecraft gear. Not buying new
radio gear every 2 years like I did with my Yaesu and Icom gear. I for one
agree with the business model and great equipment.

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


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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Tony Estep
On Sat, Jun 8, 2013 at 3:04 AM, Edward R Cole kl...@acsalaska.net wrote:

 ...the promise that SDR makes (but only Elecraft actually does)

===
I owned two of the vaunted SDR transceivers. Their hardware design is
flawed (sudden power spikes that could blow an amp, no QSK, poor auto-tune,
and other miscellaneous stuff), but more to the point that Ed mentions,
each of their much-trumpeted software updated brought an immediate flood of
bug reports (some quite serious) from users that indicated that little or
no testing had been done via on-air operation. Add to that the fact a K3
with LP-Pan and NaP3 offers a complete superset of their capabilities, and
the choice was oh so obvious.

Tony KT0NY
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Luis V. Romero

I guess we are arguing quibbles here, Don.

Of course youre correct in your comments regarding powered/unpowered 
speakers.


My ancient Yamaha YST-M101's, which are my primary station speakers on the 
line output of my K3, sound just fine to me!  But since I usually use 
headphones, I rarely listen through them anyhow.  But still, when I do 
listen without headphones, Im a happy guy (especially after the K3DSP mod 
was installed!  The buzzy flyback-transformer-like high end artifacts are 
now GONE!)


I think this entire argument is moot, but then I had to throw my hat into 
the ring... I made a pretty good living making good audio and video, and 
still do.


The K3 sound just fine to me the way it is.

Waiting for the note from the Moderator that we have beat this subject to 
death already.


-lu-
W4LT


-

Message: 9
Date: Fri, 07 Jun 2013 21:21:02 -0400
From: Don Wilhelm w3...@embarqmail.com
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton
Message-ID: 51b286fe.5090...@embarqmail.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I do not read Wayne's response that way at all.
The issue has been fixed except perhaps for all but the most discerning
ears (audiophiles).
Wayne has 'musician ears', and would not make statements like that if
not good to his ears.

As far as the K3 audio being better on powered external speakers than
with un-powered speakers, think about that for a minute.  Good powered
speakers should faithfully replicate the input signal, and that includes
any distortion products that may be present in the input signal.

Good unpowered speakers should produce an even cleaner output because
the input signal is not further distorted by the characteristics of the
powered speakers.  Unfortunately, good unpowered speakers are not the
metal cased 8 inch speakers that were available with old National or
Hallicrafters receivers, they have a lot of bass response and color the
signal a LOT.  They may sound good to many ears, but are not a faithful
representation of the input signal.  Try some high efficiency good
quality bookshelf speakers for a fair comparison.

If one wants a Hi-Fi output, then it is time to shop the audiophile
stores for speakers rather than the consumer grade computer (and iPod)
speakers that are commonly used.

73,
Don W3FPR


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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Phil Hystad

On Jun 8, 2013, at 10:11 AM, Luis V. Romero lrom...@ij.net wrote:

 stuff deleted
 Waiting for the note from the Moderator that we have beat this subject to 
 death already.
 

I think very few subjects are beaten to death on this forum since they always 
seem to keep coming back and alive time to time.  Good for me because I usually 
don't get the finer points of the debate until the third or forth time around.

peh

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Bill

From what point (date or serial number) was the K3DSP mod included?

I have never tried the K3's line out for my amplified speakers. I use 
the Behringer MS40s fed from a Behringer 802 mixer.


Thanks,

Bill W2BLC


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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Bruce Beford
Your answer lies here:
http://www.elecraft.com/K3/mods/dsp_rev_c_information.htm

Bruce
N1RX

 From what point (date or serial number) was the K3DSP mod included?



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Bill K9YEQ
Ed,

Glad I never discussed the same issue with the wife when I bought the K2.  I
now own the K3 and KX3.  The K2 is my hearty backup in case of issues.  The
Kx3 is my living room radio, if you can believe it.  The KX3 can be routed
through my THP 2.5 for a 300 watt signal provided I have selected and tuned
for the correct band while in the living room. The wife, pretends to be
somewhat oblivious  She's a keeper, esp. after nearly 40 years.

73,
Bill
K9YEQ

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward R Cole
Sent: Saturday, June 08, 2013 3:04 AM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

I agree with Fred and with Elecraft's position on product support.

When I went hat in hand to appeal with my wife to agree to spend roughly
$3K for a new ham radio, it was with the understanding that it was the last
(major) ham purchase I would make.  The continuous improvement and support
of the K3 make it possible for me to keep that promise, as I see the radio
evolving for  long time.

This is the promise that SDR makes (but only Elecraft actually does).  I
did squeak out buying the KX3, but the cost was largely offset by the sale
of my Yaesu radios (FT-847  FT-817).

Already several firmware improvements for the KX3, as well as the K3.  How
could you not like that (rhetorical question)?

73, Ed - KL7UW
BTW when I bought the K3, I also paid off my wife's new Toyota Van loan (me
no dummy).


---
Date: Fri, 7 Jun 2013 12:13:48 -0500
From: Fred Smith m...@totalhighspeed.com
To: 'Wayne Burdick' n...@elecraft.com,  'Keith-K5ENS'
 ke...@kathyandkeith.mx
Cc: 'Elecraft Reflector' elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton
Message-ID: 002901ce63a2$60751260$215f3720$@com
Content-Type: text/plain;   charset=us-ascii

Yup, Yup and Yup that's the reason I have Elecraft gear. Not buying new
radio gear every 2 years like I did with my Yaesu and Icom gear. I for one
agree with the business model and great equipment.

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

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Fred Jensen

On 6/8/2013 3:09 PM, Bill K9YEQ wrote:

Ed,

Glad I never discussed the same issue with the wife when I bought the K2.  I
now own the K3 and KX3.  The K2 is my hearty backup in case of issues.  The
Kx3 is my living room radio, if you can believe it.  The KX3 can be routed
through my THP 2.5 for a 300 watt signal provided I have selected and tuned
for the correct band while in the living room. The wife, pretends to be
somewhat oblivious  She's a keeper, esp. after nearly 40 years.


My K2 serves two purposes:  It's my QRP field radio, and I use it in 
occasional CW contests, sometimes in QRP entry class, sometimes in LP. 
The coefficient of usability of the K2 is exceeded only by my K3, but 
sometimes it's a slam dunk for the K2 if I want to work a CW Sprint out 
on the deck [if you really think it's wireless, peek behind my 
K-line].  Sometimes, I just turn to it because I like to use it ... a 
lot.  I've given up getting a mic for it.


Shortly before I retired [2000], Andrea took up Needlepoint, and became 
as addicted to it as I am to ham radio.  She proposed Equal Hobby 
Allowances, I agreed, not knowing much about the economics of 
Needlepoint.  The kids are long gone, one of several grandsons comes up 
and drives the tractor to mow the place [and we leave some cash in his 
car, he'd come anyway but he's the one who does], the house and vehicles 
are paid off, and there's money left in the checking account at the end 
of each month.


Economics of Needlepoint:  Most of my stuff is somewhat more expensive 
than hers.  She needs waaay more of her stuff than I do of mine.  It was 
a good deal. :-)


45 years and counting.  New grandkids have ended [he says with hopeful 
certainty], they're making great grandkids now.


Firmware for the K2 is embedded in the chip, there have been a series of 
small hardware mods over the years.  The radio is pretty stable.  I 
doubt seriously Elecraft will ever tell us they won't talk to us about 
it.  A chip might not be available anymore, and my K2 may become 
e-trash, but I'm not thinking anytime soon.  I'm at the point where its 
life expectancy may exceed mine.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org


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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Robert G Strickland

Fred...
With the K2 on the back deck, do you run batteries or commercial AC? If 
batteries, do you use the internal battery pack or run off of external 
batteries? If external, which one(s)? Life is never simple... Thanks.

...robert



the K2 is exceeded only by my K3, but
sometimes it's a slam dunk for the K2 if I want to work a CW Sprint out
on the deck



--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Fred Jensen
I run with batteries, outside my radio.  I use these times as tests for 
when I'm going to go to the field [that could be a local park :-)] to 
practice for  real field efforts.   I will admit, sometimes on the deck, 
I run a coax out from the tribander.  Most of the time, I do it now with 
the AlexLoop.


I never put batteries inside my radio.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org

On 6/8/2013 6:59 PM, Robert G Strickland wrote:

Fred...
With the K2 on the back deck, do you run batteries or commercial AC? If
batteries, do you use the internal battery pack or run off of external
batteries? If external, which one(s)? Life is never simple... Thanks.



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-08 Thread Fred Smith
All 3 just depends how I feel the battery is a 7ah one.

73,
Fred/N0AZZ

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Robert G Strickland
Sent: Saturday, June 08, 2013 9:00 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

Fred...
With the K2 on the back deck, do you run batteries or commercial AC? If
batteries, do you use the internal battery pack or run off of external
batteries? If external, which one(s)? Life is never simple... Thanks.
...robert


the K2 is exceeded only by my K3, but
 sometimes it's a slam dunk for the K2 if I want to work a CW Sprint 
out  on the deck


--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2242 / Virus Database: 3199/5894 - Release Date: 06/08/13

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[Elecraft] After Rob Sherwood's Talk at Dayton

2013-06-08 Thread Chris Pinholster
Hello to the fine folks on this reflector:

I am a new Elecraft K3 owner, I received mine yesterday. I made my decision 
right after I heard Sherwood speak in the Drake forum at Dayton.
He gave high praise to the K3, and I thought gave short thrift to the Orion 
565, which I owned. After the forum was over, I approached Sherwood, asked him 
about his Orion remarks and
the comparison to the K3. He answered me politely and directly. He was exactly 
right about the Orion. The encounter with Rob convinced me.

I went directly to the Elecraft booth and ordered my K3 and P3 combo. 
I had been reading for some time about the great treatment owners receive from 
Elecraft. (I got the free hat) and I look forward to a long relationship with 
Elecraft.

My Orion will be up for sale shortly, along with a few other radios to lessen 
the economic blow.
Regards,

Chris
k4...@mac.com

P.S. I'm keeping most of my Drake gear. (I like old toys too)




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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Bill W4ZV
Hisashi T Fujinaka wrote
 Can anyone point out more about the K3 transmit audio fixes that
 Sherwood talked about?

I thought most of the comments were about receive audio distortion.  There
have been several changes, both hardware (DSP upgrade) and firmware (AGC
Decay) and possibly others which affect this.

73,  Bill  W4ZV




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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Gustavo Villada
On Fri, Jun 7, 2013 at 1:06 AM, Tony Estep estept...@gmail.com wrote:

 [..].

Meanwhile other radios I've owned
 or used have had irritating flaws that would have been glaringly apparent
 to the makers if they had actually tried them on the air before committing
 the design to production.

 Tony KT0NY



Tony, that is the difference  between a company managed by executives, and
other one by engineers.

Gus
LU6AGV
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Phil Hystad
If I were using external amplified speakers (which I am not right now) on my 
K3, would I use the rear panel SPKR stereo plug, or the headphones connector 
stereo plug, or the stereo line out plug?  Or does it matter?  Noted that the 
line out impedance is much different than SPKRS or PHONES.

73, phil, K7PEH


On Jun 7, 2013, at 8:18 AM, Wayne Burdick n...@elecraft.com wrote:

 Rob helped us identify the K3's audio output distortion issue, which we 
 subsequently cleaned up with a hardware change (five years ago) and new 
 firmware (about three years ago). 
 
 If you have an older K3, see:
 
   http://www.elecraft.com/K3/mods/K3_AF_Stage_Upgrade_Instructions_Rev_B.pdf
 
 This mod, long since incorporated into production, adds a large RF choke in 
 series with the AF amplifier stage's DC supply. As Rob's plots show, this 
 dramatically knocked down the IMD products; most are now down 70-80 dB. I 
 have pretty good ears, and once we made this change, I couldn't hear any 
 difference between the internal amplifier and external powered speakers.
 
 Rob is correct that it would be possible to further reduce low-level 
 distortion products. However, many of these fall outside the hearing range of 
 the average user because they're related to an image of the 12-kHz CODEC 
 sampling rate. What's left within hearing range could be reduced with a 
 change in the AF amp IC, though there are diminishing returns and pragmatic 
 considerations. The stereo audio amplifier IC we use is capable of driving 
 two 4-ohm speakers at up to a few watts apiece, and it generates no RFI 
 because it is a classic analog device running class AB. We could get higher 
 drive power using a beefier analog device with much higher quiescent current, 
 or by using a class-D or higher switching-style device. The former would 
 increase the radio's current drain substantially, while the latter would 
 require additional shielding and decoupling. 
 
 As always, our goal is to continuously improve the K3 in a way that is 
 applicable to units in the field. If we find a practical way to achieve a 
 further significant improvement in the audio channel, we'll certainly make it 
 available. 
 
 73,
 Wayne
 N6KR
 
 
 On Jun 7, 2013, at 3:55 AM, Bill W4ZV btipp...@alum.mit.edu wrote:
 
 Hisashi T Fujinaka wrote
 Can anyone point out more about the K3 transmit audio fixes that
 Sherwood talked about?
 
 I thought most of the comments were about receive audio distortion.  There
 have been several changes, both hardware (DSP upgrade) and firmware (AGC
 Decay) and possibly others which affect this.
 
 73,  Bill  W4ZV
 
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Rick Bates
This policy is so clearly stated that I have to comment that it's a nice
change to actually hear from the actual designer AND user that doesn't speak
in 'engineer-ese'.  To 'hear' clear, concise and accurate information
without having to translate is wonderful.  I actually understood it!

Bravo!

Rick wa6nhc

-Original Message-
From: Wayne Burdick

Rob helped us identify the K3's audio output distortion issue, which we
subsequently cleaned up with a hardware change (five years ago) and new
firmware (about three years ago). 

If you have an older K3, see:

 
http://www.elecraft.com/K3/mods/K3_AF_Stage_Upgrade_Instructions_Rev_B.pdf

This mod, long since incorporated into production, adds a large RF choke in
series with the AF amplifier stage's DC supply. As Rob's plots show, this
dramatically knocked down the IMD products; most are now down 70-80 dB. I
have pretty good ears, and once we made this change, I couldn't hear any
difference between the internal amplifier and external powered speakers.

Rob is correct that it would be possible to further reduce low-level
distortion products. However, many of these fall outside the hearing range
of the average user because they're related to an image of the 12-kHz CODEC
sampling rate. What's left within hearing range could be reduced with a
change in the AF amp IC, though there are diminishing returns and pragmatic
considerations. The stereo audio amplifier IC we use is capable of driving
two 4-ohm speakers at up to a few watts apiece, and it generates no RFI
because it is a classic analog device running class AB. We could get higher
drive power using a beefier analog device with much higher quiescent
current, or by using a class-D or higher switching-style device. The former
would increase the radio's current drain substantially, while the latter
would require additional shielding and decoupling. 

As always, our goal is to continuously improve the K3 in a way that is
applicable to units in the field. If we find a practical way to achieve a
further significant improvement in the audio channel, we'll certainly make
it available. 

73,
Wayne
N6KR


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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Keith-K5ENS
This statement baffles me...


As always, our goal is to continuously improve the K3 in a way that
is applicable to units in the field. If we find a practical way to achieve a
further significant improvement in the audio channel, we'll certainly make
it available.


Why would you not make improvements to the K3 just because they can not be
applied to older units?  I'm not sure what is to gain by holding back
improvements.  As a early K3 owner I would love to see a better K3 offered. 
I would have a choice to keep my early K3 or replace it with a improved
unit.  Radios evolve all the time.  It is disappointing to know a better K3
could exist but doesn't because a new K3 may be better than the an older K3. 

That's just wrong.  IMHO.

Keith, K5ENS 



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Doug Turnbull
Keith,
It might make it more difficult to upgrade all K3s if there were a
number of different version K3s out there.   I see your point but prefer to
see Elecraft doing what it started and keeping the K3 an improving product
for all.   Once there is a K3A, B, C this may not longer be practical.   

 As a CW operator the small amount of distortion is perhaps less
noticeable than it would be if I were an ESSB operator with good hearing.

 Just one man's opinion ultimately it is up to the designers what
happens.   They have such an agreeable ethos that I am not sure it would be
good to change it.

73 Doug EI2CN

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Keith-K5ENS
Sent: 07 June 2013 17:09
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

This statement baffles me...


As always, our goal is to continuously improve the K3 in a way that
is applicable to units in the field. If we find a practical way to achieve a
further significant improvement in the audio channel, we'll certainly make
it available.


Why would you not make improvements to the K3 just because they can not be
applied to older units?  I'm not sure what is to gain by holding back
improvements.  As a early K3 owner I would love to see a better K3 offered. 
I would have a choice to keep my early K3 or replace it with a improved
unit.  Radios evolve all the time.  It is disappointing to know a better K3
could exist but doesn't because a new K3 may be better than the an older K3.


That's just wrong.  IMHO.

Keith, K5ENS 



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Bill W4ZV
Keith-K5ENS wrote
 This statement baffles me...
 
 
 As always, our goal is to continuously improve the K3 in a way
 that is applicable to units in the field. If we find a practical way to
 achieve a further significant improvement in the audio channel, we'll
 certainly make it available.
 
 
 Why would you not make improvements to the K3 just because they can not be
 applied to older units?  I'm not sure what is to gain by holding back
 improvements.  As a early K3 owner I would love to see a better K3
 offered.  I would have a choice to keep my early K3 or replace it with a
 improved unit.  Radios evolve all the time.  It is disappointing to know a
 better K3 could exist but doesn't because a new K3 may be better than the
 an older K3. 
 
 That's just wrong.  IMHO.
 
 Keith, K5ENS

Keith I don't think anything is being held back.  Everything (HW and SW)
in the K3 can be modified as has been demonstrated numerous times (e.g. most
notably replacing the entire DSP board).  I believe Wayne is just saying
that upgradability of existing units is a key consideration in their
thinking (as opposed to Japan's Big 3).  I only wish more manufacturers
thought the same way.

73,  Bill  W4ZV




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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Phil Hystad
I for one would prefer that Elecraft continue their plan to provide support to 
all
K3s in the field from the earliest serial number to the latest with the same
upgrades and options.

As far as doing something different for an even better K3, that would not be a 
K3, maybe it would be
called a K4 or whatever.  However, as long as the K3 can be that better 
product, even
for those early adopters with much older K3s, this practice would hopefully 
continue.

As far as audio goes -- I have no complaints and that may be due to the fact 
that I don't
put up an oscilloscope or spectrum analyzer on my audio output as a means of 
using the
K3.  My ears work good enough.

73, phil, K7PEH


On Jun 7, 2013, at 9:09 AM, Keith-K5ENS ke...@kathyandkeith.mx wrote:

 This statement baffles me...
 
 
As always, our goal is to continuously improve the K3 in a way that
 is applicable to units in the field. If we find a practical way to achieve a
 further significant improvement in the audio channel, we'll certainly make
 it available.
 
 
 Why would you not make improvements to the K3 just because they can not be
 applied to older units?  I'm not sure what is to gain by holding back
 improvements.  As a early K3 owner I would love to see a better K3 offered. 
 I would have a choice to keep my early K3 or replace it with a improved
 unit.  Radios evolve all the time.  It is disappointing to know a better K3
 could exist but doesn't because a new K3 may be better than the an older K3. 
 
 That's just wrong.  IMHO.
 
 Keith, K5ENS 
 
 
 
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Fred Smith
The most understood presentation I have ever heard on a complex mater, that
was easy for even me to understand.


73,
Fred/N0AZZ
K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100
P3/SVGA--KPA500--KAT500--W2




-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rick Bates
Sent: Friday, June 07, 2013 11:01 AM
To: 'Wayne Burdick'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

This policy is so clearly stated that I have to comment that it's a nice
change to actually hear from the actual designer AND user that doesn't speak
in 'engineer-ese'.  To 'hear' clear, concise and accurate information
without having to translate is wonderful.  I actually understood it!

Bravo!

Rick wa6nhc

-Original Message-
From: Wayne Burdick

Rob helped us identify the K3's audio output distortion issue, which we
subsequently cleaned up with a hardware change (five years ago) and new
firmware (about three years ago). 

If you have an older K3, see:

 
http://www.elecraft.com/K3/mods/K3_AF_Stage_Upgrade_Instructions_Rev_B.pdf

This mod, long since incorporated into production, adds a large RF choke in
series with the AF amplifier stage's DC supply. As Rob's plots show, this
dramatically knocked down the IMD products; most are now down 70-80 dB. I
have pretty good ears, and once we made this change, I couldn't hear any
difference between the internal amplifier and external powered speakers.

Rob is correct that it would be possible to further reduce low-level
distortion products. However, many of these fall outside the hearing range
of the average user because they're related to an image of the 12-kHz CODEC
sampling rate. What's left within hearing range could be reduced with a
change in the AF amp IC, though there are diminishing returns and pragmatic
considerations. The stereo audio amplifier IC we use is capable of driving
two 4-ohm speakers at up to a few watts apiece, and it generates no RFI
because it is a classic analog device running class AB. We could get higher
drive power using a beefier analog device with much higher quiescent
current, or by using a class-D or higher switching-style device. The former
would increase the radio's current drain substantially, while the latter
would require additional shielding and decoupling. 

As always, our goal is to continuously improve the K3 in a way that is
applicable to units in the field. If we find a practical way to achieve a
further significant improvement in the audio channel, we'll certainly make
it available. 

73,
Wayne
N6KR


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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread J.K. Hooper
Keith, 

I, too, think I see your point.   That point is that one strategy a company 
could take is to continuously introduce newer, better products, ones which 
might cannibalize sales of previous products with each new product 
introduction.  I worked at HP, and I think that was the strategy for the 
printer division.   I think this is a good strategy for a consumer market 
place. This worked well when sales were reasonably high volume.  

Arguably, the best aspect about the Elecraft statement which you quote is that 
it exists and guides the company investments.

That statement appeals to me.I like knowing that my radio will continue to 
be supported by my vendor and that its re-sale value, when I kick the bucket, 
will be higher than otherwise.  

So, to Elecraft, one benefit is that the strategy appeals to what-I-think is 
one of their target market segments - customers who want to be loyal customers. 
 

I see a cost reduction benefit to Elecraft as well.   Elecraft is less likely 
to need to be supporting multiple products.   They can keep inventory down, and 
won't have the costs of dealing with end of support life issues.   And design 
costs might be lower, as the company is not introducing as many new designs and 
the new designs that are introduced are primarily for completely 
new-to-Elecraft functionality.   Cost reduction is a big deal for any company.  
  

So Elecraft's strategy totally works for me. 

73, 
Hoop
K9QJS  





On Jun 7, 2013, at 9:09 AM, Keith-K5ENS ke...@kathyandkeith.mx wrote:

This statement baffles me...


   As always, our goal is to continuously improve the K3 in a way that
is applicable to units in the field. If we find a practical way to achieve a
further significant improvement in the audio channel, we'll certainly make
it available.


Why would you not make improvements to the K3 just because they can not be
applied to older units?  I'm not sure what is to gain by holding back
improvements.  As a early K3 owner I would love to see a better K3 offered. 
I would have a choice to keep my early K3 or replace it with a improved
unit.  Radios evolve all the time.  It is disappointing to know a better K3
could exist but doesn't because a new K3 may be better than the an older K3. 

That's just wrong.  IMHO.

Keith, K5ENS 

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Wayne Burdick
Keith (K5ENS) wrote:

 I'm not sure what is to gain by holding back
 improvements.  As a early K3 owner I would love to see a better K3 offered. 
 I would have a choice to keep my early K3 or replace it with a improved
 unit.  Radios evolve all the time.


Hi Keith,

It's highly desirable that changes be retrofittable since we have some 7,500 
K3s in the field. But there are different levels of mod. 

The mod we made to the RF choke (to reduce receive AF IMD) was simple, 
involving a component change. Let's call that level 1. Nearly all of the K3's 
mods over the years have been of this type.

We could completely redesign the AF stage if it were warranted, requiring 
replacement of the DSP board. Some customers might be willing to pay for such 
an upgrade, and we wouldn't . That would be level 2.

Now suppose we came up with something truly revolutionary, like a switch from 
an LCD to and OLED display. That would require replacement of the entire front 
panel module, and we might change the model number of the radio--a level 3 
change. (We are *not* going to do that, by the way :) 

Any of the above changes are retrofittable, and I can assure you that we're not 
holding anything back. The K3 was designed in a modular fashion so it can adapt 
to new requirements.

73,
Wayne
N6KR

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Fred Smith
Yup, Yup and Yup that's the reason I have Elecraft gear. Not buying new
radio gear every 2 years like I did with my Yaesu and Icom gear. I for one
agree with the business model and great equipment.



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne Burdick
Sent: Friday, June 07, 2013 11:58 AM
To: Keith-K5ENS
Cc: Elecraft Reflector
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton

Keith (K5ENS) wrote:

 I'm not sure what is to gain by holding back improvements.  As a early 
 K3 owner I would love to see a better K3 offered.
 I would have a choice to keep my early K3 or replace it with a 
 improved unit.  Radios evolve all the time.


Hi Keith,

It's highly desirable that changes be retrofittable since we have some 7,500
K3s in the field. But there are different levels of mod. 

The mod we made to the RF choke (to reduce receive AF IMD) was simple,
involving a component change. Let's call that level 1. Nearly all of the
K3's mods over the years have been of this type.

We could completely redesign the AF stage if it were warranted, requiring
replacement of the DSP board. Some customers might be willing to pay for
such an upgrade, and we wouldn't . That would be level 2.

Now suppose we came up with something truly revolutionary, like a switch
from an LCD to and OLED display. That would require replacement of the
entire front panel module, and we might change the model number of the
radio--a level 3 change. (We are *not* going to do that, by the way :) 

Any of the above changes are retrofittable, and I can assure you that we're
not holding anything back. The K3 was designed in a modular fashion so it
can adapt to new requirements.

73,
Wayne
N6KR

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Edward Dickinson III
I'd look favorably on potential receive audio improvements.

 

I'm not sure I fully understand the 'we wouldn't' below.  Is that, 'We
wouldn't introduce such an improvement (level 2),' or 'We wouldn't bear the
cost of such improvement,' (it would be the responsibility of the end user)?

 

73,

Dick - KA5KKT

 



---

Hi Keith.We could completely redesign the AF stage if it were warranted,
requiring replacement of the DSP board. Some customers might be willing to
pay for such an upgrade, and we wouldn't . That would be level 2.

 

73,

Wayne

N6KR

 

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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Rick Wheeler
I see your point but...



I can see a host of problems with implementing a policy of continuously 
improving a radio without the ability to modify the older versions. With each 
new improvement that is not possible on the older versions you increasing 
marginalize the early adopters. Now they own a K3 that is not as good as the 
later K3's and can never be as good as that later model. Early adopters are 
VERY important to a company because they provide the cash flow and feedback 
needed to successfully market and manufacture a product. In addition you will 
have various versions of the K3. Imagine the confusion for Elecraft and hams 
alike. The early K3's will be worth much less than the later ones as one knows 
it would be impossible to improve it any further. So who would buy an early 
product? Not me!! I'd wait, and wait, and wait... The constant improvement of a 
product without the ability to improve the earlier versions may work for some 
products, but it definitely would not work
 (IMHO only;-), it's not my company) for Elecraft radios.

Want a better radio? Then wait for a K4, 5, 6... 

I own a K2 No. 2005. A great radio and I am happy with the fact that No. 0001 
and  will always have the capability to be equal or very nearly equal in 
specs, quality, and ergonomics. 
 
Rick
K4LX


From: Keith-K5ENS ke...@kathyandkeith.mx
To: elecraft@mailman.qth.net 
Sent: Friday, June 7, 2013 12:09 PM
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton
 

This statement baffles me...


        As always, our goal is to continuously improve the K3 in a way that
is applicable to units in the field. If we find a practical way to achieve a
further significant improvement in the audio channel, we'll certainly make
it available.


Why would you not make improvements to the K3 just because they can not be
applied to older units?  I'm not sure what is to gain by holding back
improvements.  As a early K3 owner I would love to see a better K3 offered. 
I would have a choice to keep my early K3 or replace it with a improved
unit.  Radios evolve all the time.  It is disappointing to know a better K3
could exist but doesn't because a new K3 may be better than the an older K3. 

That's just wrong.  IMHO.

Keith, K5ENS 



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Keith-K5ENS
My only point is that from reading Wayne's statement, Elecraft is not going
to make improvements to the K3 that can not be fitted to the units in the
field. And I'm not sure there is any improvement that couldn't be fitted due
to the design of the K3.  If I remember when I built my K3 are the parts
just plugged in. That makes me think the K3 today is not the best K3 that
could be produced.  It's just not going to be made available because it
would make today's K3 less valuable.   Where does that put plans for any
future model?  I would think making changes to the K3 would be easier on K3
owners than a completely new model.  It could be a lot less tooling.  As I
have stated before the K3 as it is today is getting old.  But hey Kenwood is
still selling the TS-2000.  Not that I would want one.

I am a K3 owner SN 2654 with no plans to replace it with another brand.  I'm
just pushing for the next best great product from Elecraft.  I know it's
there.



Keith, K5ENS



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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Richard Fjeld
I'd like to weigh in at this point with a thought and a question.

Suppose a K4 were to be introduced.  If it was a standard (typical) radio, I 
can't imagine what improvements it would have other than some specs we could 
not hear as was eluded to in this discussion.

So the questions is; Unless it was very different, would we want to buy it?

Dick, n0ce

  - Original Message - 
  From: Phil Hystad 
  To: Keith-K5ENS 
  Cc: elecraft@mailman.qth.net 
  Sent: Friday, June 07, 2013 11:31 AM
  Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton


  I for one would prefer that Elecraft continue their plan to provide support 
to all
  K3s in the field from the earliest serial number to the latest with the same
  upgrades and options.

  As far as doing something different for an even better K3, that would not be 
a K3, maybe it would be
  called a K4 or whatever.  However, as long as the K3 can be that better 
product, even
  for those early adopters with much older K3s, this practice would hopefully 
continue.

  As far as audio goes -- I have no complaints and that may be due to the fact 
that I don't
  put up an oscilloscope or spectrum analyzer on my audio output as a means of 
using the
  K3.  My ears work good enough.

  73, phil, K7PEH


  On Jun 7, 2013, at 9:09 AM, Keith-K5ENS ke...@kathyandkeith.mx wrote:

   This statement baffles me...
   
   
  As always, our goal is to continuously improve the K3 in a way that
   is applicable to units in the field. If we find a practical way to achieve a
   further significant improvement in the audio channel, we'll certainly make
   it available.
   
   
   Why would you not make improvements to the K3 just because they can not be
   applied to older units?  I'm not sure what is to gain by holding back
   improvements.  As a early K3 owner I would love to see a better K3 offered. 
   I would have a choice to keep my early K3 or replace it with a improved
   unit.  Radios evolve all the time.  It is disappointing to know a better K3
   could exist but doesn't because a new K3 may be better than the an older 
K3. 
   
   That's just wrong.  IMHO.
   
   Keith, K5ENS 
   
   
   
   --
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Hisashi T Fujinaka

I misheard the audio and thought it was in the TX chain. I wondered why
he wasn't more upset about it. This all makes much more sense.

On Fri, 7 Jun 2013, Wayne Burdick wrote:


Rob helped us identify the K3's audio output distortion issue, which we 
subsequently cleaned up with a hardware change (five years ago) and new 
firmware (about three years ago).

If you have an older K3, see:

  http://www.elecraft.com/K3/mods/K3_AF_Stage_Upgrade_Instructions_Rev_B.pdf

This mod, long since incorporated into production, adds a large RF choke in 
series with the AF amplifier stage's DC supply. As Rob's plots show, this 
dramatically knocked down the IMD products; most are now down 70-80 dB. I have 
pretty good ears, and once we made this change, I couldn't hear any difference 
between the internal amplifier and external powered speakers.

Rob is correct that it would be possible to further reduce low-level distortion 
products. However, many of these fall outside the hearing range of the average 
user because they're related to an image of the 12-kHz CODEC sampling rate. 
What's left within hearing range could be reduced with a change in the AF amp 
IC, though there are diminishing returns and pragmatic considerations. The 
stereo audio amplifier IC we use is capable of driving two 4-ohm speakers at up 
to a few watts apiece, and it generates no RFI because it is a classic analog 
device running class AB. We could get higher drive power using a beefier analog 
device with much higher quiescent current, or by using a class-D or higher 
switching-style device. The former would increase the radio's current drain 
substantially, while the latter would require additional shielding and 
decoupling.

As always, our goal is to continuously improve the K3 in a way that is 
applicable to units in the field. If we find a practical way to achieve a 
further significant improvement in the audio channel, we'll certainly make it 
available.

73,
Wayne
N6KR


On Jun 7, 2013, at 3:55 AM, Bill W4ZV btipp...@alum.mit.edu wrote:


Hisashi T Fujinaka wrote

Can anyone point out more about the K3 transmit audio fixes that
Sherwood talked about?


I thought most of the comments were about receive audio distortion.  There
have been several changes, both hardware (DSP upgrade) and firmware (AGC
Decay) and possibly others which affect this.

73,  Bill  W4ZV


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--
Hisashi T Fujinaka - ht...@twofifty.com
BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Lu Romero
Keith:

Please read Wayne's reply again.

Note that he says that this is an issue with the internal audio amplifier 
driving UNPOWERED speakers. 

Two things: 

1) with the internal speaker, you cannot hear the issue at all
2) with POWERED EXTERNAL SPEAKERS connected to line out, you bypass the 
internal audio amplifier and cannot hear the issue at all.

So the solution is; if it bothers you, do not hook up external speakers,to the 
internal audio amp, use headsets or external powered speakers (as I do) on the 
line out connector.

Also consider that if what you propose was put into practice, the value of your 
early rig would suffer.

You may be independently wealthy, and may not care... But with two kids in 
college a car payment and a mortgage, I certainly do care.

Thank you Wayne, for insuring that my investment holds its value.

Lu Romero - W4LT
K3/P3/KPA500/K1

-

Message: 3
Date: Fri, 7 Jun 2013 09:09:22 -0700 (PDT)
From: Keith-K5ENS ke...@kathyandkeith.mx
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] A Rob Sherwood's talk in Dayton
Message-ID: 1370621362857-7574839.p...@n2.nabble.com
Content-Type: text/plain; charset=us-ascii

This statement baffles me...


   As always, our goal is to continuously improve the K3 in a way that
is applicable to units in the field. If we find a practical way to achieve a
further significant improvement in the audio channel, we'll certainly make
it available.


Why would you not make improvements to the K3 just because they can not be
applied to older units?  I'm not sure what is to gain by holding back
improvements.  As a early K3 owner I would love to see a better K3 offered. 
I would have a choice to keep my early K3 or replace it with a improved
unit.  Radios evolve all the time.  It is disappointing to know a better K3
could exist but doesn't because a new K3 may be better than the an older K3. 

That's just wrong.  IMHO.

Keith, K5ENS 
Sent from my iPad
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-07 Thread Don Wilhelm

I do not read Wayne's response that way at all.
The issue has been fixed except perhaps for all but the most discerning 
ears (audiophiles).
Wayne has 'musician ears', and would not make statements like that if 
not good to his ears.


As far as the K3 audio being better on powered external speakers than 
with un-powered speakers, think about that for a minute.  Good powered 
speakers should faithfully replicate the input signal, and that includes 
any distortion products that may be present in the input signal.


Good unpowered speakers should produce an even cleaner output because 
the input signal is not further distorted by the characteristics of the 
powered speakers.  Unfortunately, good unpowered speakers are not the 
metal cased 8 inch speakers that were available with old National or 
Hallicrafters receivers, they have a lot of bass response and color the 
signal a LOT.  They may sound good to many ears, but are not a faithful 
representation of the input signal.  Try some high efficiency good 
quality bookshelf speakers for a fair comparison.


If one wants a Hi-Fi output, then it is time to shop the audiophile 
stores for speakers rather than the consumer grade computer (and iPod) 
speakers that are commonly used.


73,
Don W3FPR

On 6/7/2013 8:54 PM, Lu Romero wrote:

Keith:

Please read Wayne's reply again.

Note that he says that this is an issue with the internal audio amplifier 
driving UNPOWERED speakers.

Two things:

1) with the internal speaker, you cannot hear the issue at all
2) with POWERED EXTERNAL SPEAKERS connected to line out, you bypass the 
internal audio amplifier and cannot hear the issue at all.

So the solution is; if it bothers you, do not hook up external speakers,to the 
internal audio amp, use headsets or external powered speakers (as I do) on the 
line out connector.

Also consider that if what you propose was put into practice, the value of your 
early rig would suffer.

You may be independently wealthy, and may not care... But with two kids in 
college a car payment and a mortgage, I certainly do care.

Thank you Wayne, for insuring that my investment holds its value.


.net/donate.html



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[Elecraft] A Rob Sherwood's talk in Dayton

2013-06-06 Thread Gustavo Villada
A comparison of several rigs, KX3 included

http://www.youtube.com/watch?v=SOf2OOGeGi8



73
Gus LU6AGV
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-06 Thread Tony Estep
Very interesting, Gus. One of the most salient impressions that comes out
is how little on-air testing seems to be done by most manufacturers. I
guess that most rigs are made for phone ragchewers, and are probably fine
for that purpose; but many of the faults that Rob Sherwood points out
become obvious with a few hours of actual pileup or contest operation. How
could a manufacturer imagine that a DXer would prefer to work a split
pileup with a mouse-tuned radio, or send CW with a radio whose internal
keyer spits out dits and dahs of random length? And the phase-noise
dynamics that Rob describes -- they may not show up on a certain test, but
they're clear enough when you use the radio, as are a variety of AGC
problems. The Elecraft tradition started with rigs that would meet the
requirements of a multi-op Field Day, and they have stuck with that
viewpoint, to the benefit of their users. Meanwhile other radios I've owned
or used have had irritating flaws that would have been glaringly apparent
to the makers if they had actually tried them on the air before committing
the design to production.

Tony KT0NY



On Thu, Jun 6, 2013 at 6:09 PM, Gustavo Villada vill...@gmail.com wrote:

 A comparison of several rigs, KX3 included

 http://www.youtube.com/watch?v=SOf2OOGeGi8



 73
 Gus LU6AGV
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Re: [Elecraft] A Rob Sherwood's talk in Dayton

2013-06-06 Thread Hisashi T Fujinaka

Can anyone point out more about the K3 transmit audio fixes that
Sherwood talked about?

On Thu, 6 Jun 2013, Gustavo Villada wrote:


A comparison of several rigs, KX3 included

http://www.youtube.com/watch?v=SOf2OOGeGi8



73
Gus LU6AGV
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BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte
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