[Elecraft] Lower Header Kit Prices & What's Coming Next

[Gary Hvizdak]

We have lowered our un-module header kit prices:
o   by $3.50 (for all of our rev. D based kits)
o   by an average of $0.625 (for our rev. G based kits)

If you ordered since our rev. G pre-production sale, then Ken will
automatically credit you the difference 

Also, Ken will be offering a $2 rebate for customers who purchased
rev. D board products at our original (pre-sale) prices, and who now
wish to upgrade to rev. G.  The purpose of this discount is to average
our NRE (Non-Recurring Engineering) costs, which were significantly
greater for rev. D than for rev. G.  I'll be updating our "Ordering"
page this weekend to describe how this rebate will be applied.

 --- - - - ---

With our rev. G board now in production, I'll be turning my attention
back to our documentation, and to fixing our website so it displays
properly for Mozilla Firefox users.  When the website revision is done,
it promises to display better with Firefox than with Internet Explorer! 

 --- - - - --- 

One task that's particularly high on my "To Do" list is a major
revision of our Companion Guide.  The next release will:

o   incorporate a suggestion from G3XYS that does away with the task
of annotating the K2 assembly instructions.  Instead the Companion
Guide will have the assembly instructions.  The annotations to the
K2 assembly manual will be limited to including references back to
the Companion Guide.

o   include lots of background information provided by W3FPR regarding
the VCO circuit change that's required for 60 meter operation, and
giving the builder perhaps as many as three choices as to when to
change this circuit.

73,
Gary, KI4GGX
K2 #4067

Visit our website at http://www.unpcbs.com/ to learn about our un-
module header products and our rework-free "Plug & Play Ready" K2
assembly instructions.

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Re: [Elecraft] Eary NAQP?

[Jack Brindle]

Practice makes perfect. The Northern California Contest Club sponsors  
a short practice session (about 30 minutes) on Thursdays and Fridays  
before major contests. Also, we have a short sprint contest on  
Thursday evenings, lasting about 30 minutes.


For more details, go to:   http://www.ncccsprint.com/


On Aug 4, 2006, at 7:54 PM, Craig Rairdin wrote:


Sri for the off-topic post but you guys know everything.

Why are there a couple dozen stations on 20M CW calling "CQ NA"?  
Doesn't

that start tomorrow at 1800Z?

Craig
NZ0R
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-Jack Brindle, W6FB
===


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[Elecraft] Eary NAQP?

[Craig Rairdin]

Sri for the off-topic post but you guys know everything.
 
Why are there a couple dozen stations on 20M CW calling "CQ NA"? Doesn't
that start tomorrow at 1800Z?
 
Craig 
NZ0R
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Re: [Elecraft] Multimeter Altitude Limits

[Dan Allen]

Correct.  Pressure and density are not the same thing.  But if we are 
talking about arcing, should we be more concerned with pressure altitude, or 
density altitude?  A higher than standard temperature can make a huge 
difference in the two.


As an old pilot, I had to ask!

Dan Allen
KB4ZVM
K-2 S/N 1757


Air is a dielectric. While its dielectric *constant* is almost identical
to vaccum, its dielectric *strength* (volts per distance) decreases with
density (pressure) until you get into some really hard vacuum situations.
See  for a
chart.
For air at STP it's about 3000 volts per millimeter

In interpreting that chart, remember that standard atmospheric pressure
is 760 torr, and at 2000 meters altitude (the notorious 6500 ft)  the
pressure is about 600 torr. Pressure and density aren't linearly related
because of the temperature drop as you go up, but its a decent
approximation for the first couple thousand meters or so. By the time you
reach 300 torr, at about 7500 meters, the dielctric strength of air is
degraded by about a factor of 2, and by 30,000 meters (10 torr) it's
degraded by about 90%. We routinely fly our balloons above 38,000 meters.




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RE: [Elecraft] J-F's photos

[Ron D'Eau Claire]

That is a great picture. A cover shot if I ever saw one!>> Try this link...

Merci beaucoup, Jean-Francois 

Ron AC7AC 

>> Try this link...
>>
>> http://homepage.mac.com/jfmenard/va2vyz.jpg

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Re: [Elecraft] J-F's photos

[JEAN-FRANCOIS MENARD]

You know, sometime it is purely luck !! :-))

And other time, it is experience that do the work...

Thanks for your comment !!!

Ron Hahn EI2JP a écrit :


On 4 Aug 2006, at 19:34, JEAN-FRANCOIS MENARD wrote:


Try this link...

http://homepage.mac.com/jfmenard/va2vyz.jpg



Lovely!  How come my radio photos don't come out like this?

--
Ron Hahn - EI2JP (a.k.a. W1VON)
Grid:  IO52GA  CQ: 14  ITU: 27  IOTA: EU-115
FISTS: 10883
Club Web Site:  http://www.ei1karg.com
QSL Info: http://www.qrz.com/detail/EI2JP
Mob. +353-86-600-5499





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[Elecraft] Multimeter Altitude Limits

[James Duffey]

I have lived at about 7000 ft asl for the last 14 years and never had a 
problem with a multimeter functioning properly. This includes cheap 
Harbor Freight models. an HP or two , a Fluke, an old analog Triplett 
(Simpson?)260, and several rigs with LCD displays.


So that although I suspect that the there is a limit, it is much higher 
than 7000 ft asl, and the 6500 ft asl is an aribitrary limit imposed by 
someone who lives near sea level. Like in Taiwan, Malaysia, or Tijuana. 
I would think that the multimeter that you are considering will do fine 
where you want to use it and you will have no problems.


The marketing department does work in mysterious ways. - Dr. Megacycle 
KK6MC/5

--
James Duffey KK6MC/5
Cedar Crest NM 87008
DM65

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RE: [Elecraft] Yaesu YH77STA & K2

[peter gerba]

Hi Vic;

You can build a roll off filter with some caps and an inductor or two. Look
at an old "ARRL Handbook" for this info. I'm not sure if the newer Handbooks
cover this topic.

pete

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Vic K2VCO
Sent: Friday, August 04, 2006 10:02 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] Yaesu YH77STA & K2


peter gerba wrote:
> Icom HP-4 headphones  22.95 from universal radio.  They roll off the high
> end. I've been using them for years for cw.

The trouble with these is that they are monaural.  Stereo is important
because I want to investigate binaural modes for CW, such as putting the
I and Q outputs of a quadrature sampling detector into each ear, etc.

The Yaesu phones are stereo but the frequency range is important so I
can get rid of the external DSP I'm using to kill sidetone thumps and
clicks.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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Re: [Elecraft] Yaesu YH77STA & K2

[Tom Arntzen]

I use the KOSS PortaPro headphones.
I found them to be lightweight and easy to drive with low audio.
Also easy to collapse for that mountaintrip or camping.
Very nice audio.
Low cost quality , at least here in Norway.

Tom LA1PHA

- Original Message - 
From: "Bernard Gaffney" <[EMAIL PROTECTED]>

To: 
Sent: Friday, August 04, 2006 6:24 AM
Subject: [Elecraft] Yaesu YH77STA & K2



Hi,

 anyone using the Yaesu YH77STA headphones with their
K2? If so, what do you think of them (pros & cons)?

  Tnx

72 de N8PVZ
  ---bernie


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Re: [Elecraft] KDSP2 Performance

[Bob Tellefsen]

Hello Elliott

The KDSP2 and the KNB2 work together.  The KNB2 blanker handles
pulse noises, while the KDSP2 works more on the "white" noises you
hear.  Neither by itself can do the whole job, but together they work
just fine.  Sometimes one kind of noise will predominate, and some-
times the other.  Sometimes both occur together.  It's really nice to
have the combo available to handle whatever you get hit with.

Good luck and 73
Bob N6WG

- Original Message -
From: "Elliott Lawrence" <[EMAIL PROTECTED]>
To: "Elecraft List" 
Sent: Friday, August 04, 2006 9:01 AM
Subject: [Elecraft] KDSP2 Performance





I am thinking of adding the KDSP2 to my trusty K2.  I have listened to the
.wav files on the Elecraft site and the reduction in ambient noise is
impressive.  I know that the DSP is designed to handle random/thermal noise
but can anyone comment on its actual ability to handle pulse/burst noise
such as that generated by power lines etc.

Thanks es 73,
Elliott WA6TLA
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Re: [Elecraft] Yaesu YH77STA & K2

[Joe-aa4nn]

I sometimes plug my YH77ST headsets into my PC phones out, which
is stereo, and put a music CD in the drive and listen to some great stereo
music.  I don't know about the 20Khz upper response but the "highs" and
"lows" I hear are quite high fidelity.  Certainly much broader than the
100-5000HZ.  Plus, they are amazing CW receptors as well.
de Joe, aa4nn

Do you know what the frequency response of these 'phones is?  Are they 
the usual 20Hz - 20Khz "hi-fi" type, or do they have a more limited 
response, like 100-5000 Hz?.



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Re: [Elecraft] J-F's photos

[JEAN-FRANCOIS MENARD]

If you click also on the picture, it will be greater than just 
thumbnail.. ;-)


Ron Hahn EI2JP a écrit :


On 4 Aug 2006, at 13:23, JEAN-FRANCOIS MENARD wrote:



Thanks for your excellent comment !!!
No problemo for the screen saver I hope I will do a few more 
photos like this one some day !!!


I was very lucky that day.

Best 73


Must have been asleep that day?  Where is this magnificent photo to be 
seen?


73 de Ron EI2JP
--
Ron Hahn - EI2JP (a.k.a. W1VON)
Grid:  IO52GA  CQ: 14  ITU: 27  IOTA: EU-115
FISTS: 10883
Club Web Site:  http://www.ei1karg.com
QSL Info: http://www.qrz.com/detail/EI2JP
Mob. +353-86-600-5499





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Re: [Elecraft] J-F's photos

[JEAN-FRANCOIS MENARD]

Try this link...

http://homepage.mac.com/jfmenard/va2vyz.jpg


Ron Hahn EI2JP a écrit :


On 4 Aug 2006, at 13:23, JEAN-FRANCOIS MENARD wrote:



Thanks for your excellent comment !!!
No problemo for the screen saver I hope I will do a few more 
photos like this one some day !!!


I was very lucky that day.

Best 73


Must have been asleep that day?  Where is this magnificent photo to be 
seen?


73 de Ron EI2JP
--
Ron Hahn - EI2JP (a.k.a. W1VON)
Grid:  IO52GA  CQ: 14  ITU: 27  IOTA: EU-115
FISTS: 10883
Club Web Site:  http://www.ei1karg.com
QSL Info: http://www.qrz.com/detail/EI2JP
Mob. +353-86-600-5499





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Re: [Elecraft] Multimeter Altitude Limits

[n5ib]

On Fri, 4 Aug 2006 07:58:37 -0700 Peter writes:
>Hi Jim;
>I understand arcing at standard Temp. and pressure.  I thought that 
>the reduction of media would produce an increase of voltage Vs. distance

>(vacuum relays and Caps.)

Air is a dielectric. While its dielectric *constant* is almost identical
to vaccum, its dielectric *strength* (volts per distance) decreases with
density (pressure) until you get into some really hard vacuum situations.
See  for a
chart.
For air at STP it's about 3000 volts per millimeter

In interpreting that chart, remember that standard atmospheric pressure
is 760 torr, and at 2000 meters altitude (the notorious 6500 ft)  the
pressure is about 600 torr. Pressure and density aren't linearly related
because of the temperature drop as you go up, but its a decent
approximation for the first couple thousand meters or so. By the time you
reach 300 torr, at about 7500 meters, the dielctric strength of air is
degraded by about a factor of 2, and by 30,000 meters (10 torr) it's
degraded by about 90%. We routinely fly our balloons above 38,000 meters.

See


for a representative chart of pressure, altitude, and other
meteorological parameters.

The vacuum relays and caps incorporate some pretty hard vacuum, I'd
surmise. Pretty bitter pill to swallow... paying premium bucks for a
better grade of nothing :^))

So, if your working around higher voltages than most of our QRP gear, I
guess it's best not to inhale  :^))

73
Jim N5IB



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[Elecraft] Re: [QRP-L] WA3WSJ AT-Mini Paddle & and Elecraft KXPD1 Paddle

[David Toepfer]

While I love the simplicity of this idea, the only  concern I would have for
myself if it is directly plugged in to any board-mounted elecraft key jack is
that the jack is not designed for constant pushing back abnd forth and will
likely cause premature failure of the board and/or jack.

NOTE: Elecraft addressed this with their KXPD1 by including a mounting screw
for stability and load distribution.

I do, however, like the idea of the hand-held 1/4" plug/paddle in the extension
cable at the top of their page.

David, K3TUE
.

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Re: [Elecraft] Yaesu YH77STA & K2

[Vic K2VCO]

peter gerba wrote:

Icom HP-4 headphones  22.95 from universal radio.  They roll off the high
end. I've been using them for years for cw.


The trouble with these is that they are monaural.  Stereo is important 
because I want to investigate binaural modes for CW, such as putting the 
I and Q outputs of a quadrature sampling detector into each ear, etc.


The Yaesu phones are stereo but the frequency range is important so I 
can get rid of the external DSP I'm using to kill sidetone thumps and 
clicks.

--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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RE: [Elecraft] Yaesu YH77STA & K2

[peter gerba]

Icom HP-4 headphones  22.95 from universal radio.  They roll off the high
end. I've been using them for years for cw.

pete

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Vic K2VCO
Sent: Friday, August 04, 2006 9:36 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] Yaesu YH77STA & K2


Joe, aa4nn wrote:
> Bernie, etal,
>
> Yaesu YH77STA headphones are lightweight
> and very comfortable.

Do you know what the frequency response of these 'phones is?  Are they
the usual 20Hz - 20Khz "hi-fi" type, or do they have a more limited
response, like 100-5000 Hz?  I am looking for a comfortable set with a
communications-type response.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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RE: [Elecraft] Yaesu YH77STA & K2

[peter gerba]

Icom has some light weight communications type head phones. I think the
receiver section of the icom page will find them.

pete

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Vic K2VCO
Sent: Friday, August 04, 2006 9:36 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] Yaesu YH77STA & K2


Joe, aa4nn wrote:
> Bernie, etal,
>
> Yaesu YH77STA headphones are lightweight
> and very comfortable.

Do you know what the frequency response of these 'phones is?  Are they
the usual 20Hz - 20Khz "hi-fi" type, or do they have a more limited
response, like 100-5000 Hz?  I am looking for a comfortable set with a
communications-type response.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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Re: [Elecraft] Yaesu YH77STA & K2

[Vic K2VCO]

Joe, aa4nn wrote:

Bernie, etal,

Yaesu YH77STA headphones are lightweight
and very comfortable.  


Do you know what the frequency response of these 'phones is?  Are they 
the usual 20Hz - 20Khz "hi-fi" type, or do they have a more limited 
response, like 100-5000 Hz?  I am looking for a comfortable set with a 
communications-type response.

--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[Elecraft] Limited success with USB to Serial Cable Adapter

[gehringc]

I achieved some limited degree of success last night with my USB to Serial 
adapter cable.

 Thanks to the excellent recommendation/endorsement from Paul Gates, KD3JF and 
Don Nesbitt, N4HH, I visited the I.O.Gear web-site and downloaded the 
USB-Serial Driver for the GUC232A cable.  
http://www.iogear.com/main.php?loc=dm

Installing the driver was just a little tricky; I had to uninstall the old 
driver (following instructions from the MS Windows Tech Support web-site).   I 
also downloaded the GIC232A Manual from I.O.Gear.  

The driver installed and showed up as "Prolific USB Serial".  Again following 
the instructions from the KIO2 manual, I conducted the Menu "PORT" test and 
"Eureka!" the radio responded to commands from the Hyper Terminal, perfectly.

Unfortunately, I labeled it a limited success because when I attempted to 
connect my K2 with my “Ham Radio Deluxe” software things did not run smoothly.  
There appeared to be a huge latency issue between HRD and the K2.  The full 
frequency from my K2 did not always show up on HRD and commands from the HRD to 
the K2 were delayed about 8-10 seconds.  After running HRD straight to a Serial 
input and experiencing a seamless interface this was disappointing. But alas 
that is something that I will work on with HRD and I really don’t consider that 
a major issue, as I know that I will work it out.  I have faith in Simon Brown 
and the HRD forum.

For what it may be worth it seemed that changing positions of the USB cable 
from one USB connection (on the back of the computer) and there by changing my 
COM Port settings gave me different results.  My system did not seem to like 
COM Port 3 or 4, but by moving to a different USB connection and changing to 
COM Port 5 and 6 showed very good results.  It may be worth a try.
The point is that the I.O.Gear GUC232A software worked.  For those individuals 
looking to get a USB to Serial Interface, I found a great deal from Amazon.com 
for the Cable and Software for $20 shipping included   
http://www.dealtime.com/xPC-Iogear_G_UC232A

73 Chuck
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[Elecraft] KDSP2 Performance

[Elliott Lawrence]

I am thinking of adding the KDSP2 to my trusty K2.  I have listened to the .wav 
files on the Elecraft site and the reduction in ambient noise is impressive.  I 
know that the DSP is designed to handle random/thermal noise but can anyone 
comment on its actual ability to handle pulse/burst noise such as that 
generated by power lines etc.

Thanks es 73,
Elliott WA6TLA
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[Elecraft] F/S KAF2 Audio Filter

[SABorns]

For Sale:
 
   KAF2 Audio Filter and Real-Time Clock  (Assembled and Tested)
 
   I just purchased this module but decided to go to the 
KDSP2 instead. $70.00  shipped 
  CONUS.
 
  73,
  Steve K8IDN
 
  
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[Elecraft] Continuing Serial to (RS232, DB9) to USB Adapter Cable

[David Lear]

Chuck Gehring wrote:-

"The closest I came to success was seeing a tiny blip of undecipherable 
data stream on the hyper terminal window during the K2 port test."


I am in the same position except I measured it with a multimeter set to 
the AC millivolts range (on Gary Surrency's advice) and the software 
responds with a one time change of frequency and mode (N3FJP ACLOG). My 
question is what in the K2 generates the continuous data stream?


My story is that I think that in a nearby lightning strike, my USB/RS232 
adapter was fried. I also found that my Adapter chip on the I/O board 
needed replacing. In debugging this condition I destroyed the MCU 
(grugh).That's now replaced and I'm at this one shot condition. I 
replaced my damaged adapter, that was working, with the same make (from 
Buxcomm). That works to extent  that it passes on the one shot data. Any 
ideas?


73, Dave Lear
NE5DL

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RE: [Elecraft] Multimeter Altitude Limits

[peter gerba]

Hi Jim;

I understand arcing at standard Temp. and pressure.  I thought that the
reduction of media would produce an increase of voltage Vs. distance (vacuum
relays and Caps.)

I'm missing something here.

pete kn6bi

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
Sent: Thursday, August 03, 2006 5:20 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Multimeter Altitude Limits


In our high altitude ballooning program at LSU (>120,000 feet) it's
necessary to be very careful about sharp edges and corners in circuits of
even modest voltages. Vacuum chamber testing is an essential part of the
payload development. Our student payload had a Geiger-Muller tube, and
that's a couple hundred volts, so they had to be sure to test in the
chamber.

Interestingly... 6500 ft is 1981 meters, so I speculate a conversation
like..

Pointy Haired Boss: We need an altitude limit because of HV arcing, what
do think it should be?
Alice: Oh, couple thousand meters or so should be safe enough.
Pointy Haired Boss: OK, tell marketing.
Alice: Fine, but remember we're selling it in the USA.
Pointy Haired Boss: Not to worry, ad copy writers will take care of
conversion.

I recall a wireless device whose range was specified on the package to be
"up to 328 feet."
Amazing how they knew it would work at 327 but not at 329. Of course what
was meant was that the range was about 100 meters.  :^))

73
Jim N5IB

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Re: [Elecraft] J-F's photos

[JEAN-FRANCOIS MENARD]

Thanks for your excellent comment !!!
No problemo for the screen saver I hope I will do a few more photos 
like this one some day !!!


I was very lucky that day.

Best 73


John Wiener a écrit :

Man!
J-F, your photo "Hams at Work" belongs on the cover of QST.  
Excellent work, OM!


John
AB8WH

PS, I think I just found a new screen saver...is that OK?
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Re: [Elecraft] Yaesu YH77STA & K2

[Joe, aa4nn]

Bernie, etal,

Yaesu YH77STA headphones are lightweight
and very comfortable.  I have used them for
many years at home as well as on DXpedition
with a K2 working those gruelling 3 to 4-hour
shifts of pileups.  I don't wear them covering
my ear but pushed slightly forward.  Great
sound from those beautiful CW tones.  I have
no idea how they sound on that other mode.

de Joe, aa4nn

>Anyone using the Yaesu YH77STA headphones with their
>K2? If so, what do you think of them (pros & cons)?
>
>   Tnx
>
> 72 de N8PVZ
>   ---bernie
>
>
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[Elecraft] No power output K2 Part III of assembly Problem Solved

[W7is]

Thanks very much for the helpful suggestions on how to solve the 
no power output in the final assembly Part  III.  W3FJP provided
a very detailed test procedure and a number of others provided  info
about how they solved similar problems. The RF  probe showed low
output from the Buffer.   Using a magnifying lens I found  what
 appeared to be a tiny hint of a  pool of solder around   RFC13. 
After touching it  up,  all is well with full output  power. I also 
found my  trusty  35 yrs old 2kw dummy load had a bad coax  fitting.  
 
Even though I was up half the night, it was worth the effort!!!  
 
Frank W7is   
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Re: [Elecraft] Yaesu YH77STA & K2

[Gordon Gibson]

Hi Bernie

I use Yaesu YH77STA with my K2 (2746) and I love them, I am not sure what 
Pro's and Cons you refer to but I prefer a light pair of phones and these 
are ideal from my point of view, the only other pair of earphones I have 
used on the K2 were Heil and I found those to be very claustrophobic  if 
that is the correct word they shut everything out!


73 de Gordon G3ZFZ
#2746


- Original Message - 
From: "Bernard Gaffney" <[EMAIL PROTECTED]>

To: 
Sent: Friday, August 04, 2006 5:24 AM
Subject: [Elecraft] Yaesu YH77STA & K2



Hi,

 anyone using the Yaesu YH77STA headphones with their
K2? If so, what do you think of them (pros & cons)?



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