Re: [Elecraft] KDVR

[juergen]

Hi David

A  simple way of erasing recorded messages would be nice. Blanking the entire 
message bank would also help.

A way of  resetting the recorder to the beginning would also make life easy 
when playing back recordings. You always end up with mess of different 
recordings that requires care and guessing when you are playing them back.

I marvel  at how well my simple Sony DVR works, I wish it was in the K3. I 
could then save my recordings  for future reference.

John


--- On Sat, 6/5/10, David Pratt  wrote:

> From: David Pratt 
> Subject: Re: [Elecraft] KDVR
> To: "N8XPQ" 
> Cc: elecraft@mailman.qth.net
> Date: Saturday, June 5, 2010, 11:38 PM
> In a recent message, N8XPQ 
> wrote ...
> >
> >I have competed K# build #4354 this afternoon. I have a
> question about the
> >operation or capabilities of the KDVR. Is it possible
> to playback audio from
> >a received station, back over the air to that station?
> 
> Yes, it is, but it's bit awkward at the moment particularly
> if you use a 
> speaker and do not normally monitor your outgoing
> speech.  We are told 
> that a forthcoming K3 software release will enable the
> monitor to be 
> enabled while playing back a received station over the
> KDVR.
> 
> 73
> -- 
> David G4DMP
> Leeds, England, UK
> --
> 
> 
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 


  
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K2 - first tests and some problems (serial no. 6905)

[Ian Liston-Smith]

Hi Don,

Fantastic, yes, holding down 4, 5 and 6 cleared it!

Many thanks.

Regards and 73,

Ian, G4JQT

> Date: Sat, 5 Jun 2010 16:08:38 -0400
> From: w3...@embarqmail.com
> To: ian...@hotmail.co.uk
> CC: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K2 - first tests and some problems (serial no. 6905)
> 
> Ian,
> 
> That sounds like either the menu system has gotten messed up or you have 
> one or more soldering problems.
> 
> I suspect that you may have attempted to change some menu items and do 
> other actions when it did not work without the regulator installed.
> Since this is a new build, I suggest you do a Master Reset which will 
> put all the menu items back at the default setting.
> Hold the 4, 5 and 6 buttons in while turning power on. then wait for the 
> reset to complete.
> 
> If that does not change anything, please let us know what you have 
> accomplished and what you now observe.
> 
> 73,
> Don W3FPR
> 
> Ian Liston-Smith wrote:
> > Hi there. I suspect this may be the first of many questions and requests 
> > for advice with my new K2... 
> >
> > First test (K2 manual page 43) revealed that I had stupidly omitted the U2 
> > 6V regulator (thought missing from kit until today), so I got the 080 error 
> > message. 
> >
> > Added this and did not get the 7100.00c display but 3030 with blinking A 
> > and RIT indicators with r above XIT and sometimes a - (dash) above that, 
> > depending on band selected.
> >
> > Scrolling though the bands gives: various 3040/3028/etc frequency readings 
> > with a 25023 and "turn 1" and "turn 2" appearing momentarily. 
> >
> > The relays are clicking with band selection and the display seems ok, 
> > although I cannot get
> > ST L 040 but ST L 003  and not INP HAND only INP SCAN
> >
> > One green bar at extreme right of S-meter.
> >
> > Shaft encoder rate/direction and battery volts/current display are ok.
> >
> > Are these related to firing it up first time without 6V U2? 
> >
> > What should I check? 
> >
> > Many thanks.
> >
> > Ian 
> >   
> > _
> > http://clk.atdmt.com/UKM/go/195013117/direct/01/
> > We want to hear all your funny, exciting and crazy Hotmail stories. Tell us 
> > now
> > __
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft@mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> >
> >   
  
_
http://clk.atdmt.com/UKM/go/195013117/direct/01/
We want to hear all your funny, exciting and crazy Hotmail stories. Tell us now
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] XV50 cooling

[Geoffrey Mackenzie-Kennedy]

Don,

I do not like to add to your workload, but I would be interested to know if 
the heat generated by the Mitsubishi power module has any negative effect on 
the transverter's noise figure (receive mode) if you have the time to 
measure it. If I understand the layout of the XV50 correctly, the input 
circuitry of its receive path is placed quite close to the power module.

My reason for asking is that I have been considering the option of buying a 
XV50 for use in a set up dedicated only to 6m EME, rather than building a 
transverter from scratch

73,
Geoff
GM4ESD


Don Wilhelm wrote on Sunday, June 06, 2010 at 3:59 AM:



> Gentleman,
>
> My promised temperature rise measurements will have to be delayed a
> bit.  This XV50 has a bad power output module and I will have to wait
> for one to be sent from Watsonville.  Later next week, I will have the 
> data.
>
> BTW - Mitsubishi in their notes at the end of the data sheet suggest
> that the module case temperature should be limited to 60 deg/C - but
> that is "too hot to touch" (140 deg/F), so the "excessively hot"
> criteria may actually be well within the limits of tolerance - I would
> not want to hold my hand very long on a surface that is at 60 deg/C.
> Also, I do agree that other components can be affected by the
> temperature rise, but most are spec-ed at 60 deg/C, so in reality, there
> may be no problem, just a "discomfort zone" - details after the new
> module arrives.
>
> 73,
> Don W3FPR




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] XV50 cooling

[Don Wilhelm]

Geoff,

I do not have proper equipment to do a true noise figure measurement, 
but my signal generator will go down to -140 dBm, and I can give the 
number of dB above the receive noise floor for that signal strength - I 
can do that at various temperatures during the other tests.

I doubt the temperature rise will affect the active devices, but a 
change in temperature *could* alter the inductors a bit which could 
detune the input circuits slightly.  At this point, that is all speculation.

73,
Don W3FPR

Geoffrey Mackenzie-Kennedy wrote:
> Don,
>
> I do not like to add to your workload, but I would be interested to know if 
> the heat generated by the Mitsubishi power module has any negative effect on 
> the transverter's noise figure (receive mode) if you have the time to 
> measure it. If I understand the layout of the XV50 correctly, the input 
> circuitry of its receive path is placed quite close to the power module.
>
> My reason for asking is that I have been considering the option of buying a 
> XV50 for use in a set up dedicated only to 6m EME, rather than building a 
> transverter from scratch
>
> 73,
> Geoff
> GM4ESD
>
>
> Don Wilhelm wrote on Sunday, June 06, 2010 at 3:59 AM:
>
>
>
>   
>> Gentleman,
>>
>> My promised temperature rise measurements will have to be delayed a
>> bit.  This XV50 has a bad power output module and I will have to wait
>> for one to be sent from Watsonville.  Later next week, I will have the 
>> data.
>>
>> BTW - Mitsubishi in their notes at the end of the data sheet suggest
>> that the module case temperature should be limited to 60 deg/C - but
>> that is "too hot to touch" (140 deg/F), so the "excessively hot"
>> criteria may actually be well within the limits of tolerance - I would
>> not want to hold my hand very long on a surface that is at 60 deg/C.
>> Also, I do agree that other components can be affected by the
>> temperature rise, but most are spec-ed at 60 deg/C, so in reality, there
>> may be no problem, just a "discomfort zone" - details after the new
>> module arrives.
>>
>> 73,
>> Don W3FPR
>> 
>
>
>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>   
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] Fw: Michele Bachmann Is 'Hot Property'

[NORMAN HEGYI]

- Forwarded Message 
From: Arthur Nienhouse 
To: Tim ; Gus Coro ; Jerry Celmer 
; Norm Hegyi 
Sent: Sat, June 5, 2010 8:12:41 PM
Subject: Re: Michele Bachmann Is 'Hot Property'

I believe she is "ordained" of God to be where she is and a rising star indeed 
remember when she took down that piece of dung Arlin Spector in a debate he 
told her to shut up and act like a lady ...she thought for about a second and 
did a come back I am a lady .
I like her on the presidential ticket in 12 either spot would be my thinking.
z

On 6/5/2010 7:54 PM, Tim wrote:
> http://www.newsmax.com/InsideCover/michele-bachmann-minnesota-republican/2010/06/05/id/361135
> 
> I think more&  more people are waking up. A good sign is when newspapers 
> start writing stories like this
> 
> 
>   
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] Fw: Michele Bachmann Is 'Hot Property'

[Bob Naumann]

I hope it's obvious to everyone that this was sent to the list in error so
please eschew further comment.

Please!

W5OV

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of NORMAN HEGYI
Sent: Sunday, June 06, 2010 7:42 AM
To: Elecraft@mailman.qth.net; Al Eddelman; BRIAN ROOSA; Cindy Marino; Dan
Conroy; Dicky Bomar; Karen Newberg
Subject: [Elecraft] Fw: Michele Bachmann Is 'Hot Property'





- Forwarded Message 
From: Arthur Nienhouse 
To: Tim ; Gus Coro ; Jerry Celmer
; Norm Hegyi 
Sent: Sat, June 5, 2010 8:12:41 PM
Subject: Re: Michele Bachmann Is 'Hot Property'

I believe she is "ordained" of God to be where she is and a rising star
indeed remember when she took down that piece of dung Arlin Spector in a
debate he told her to shut up and act like a lady ...she thought for about a
second and did a come back I am a lady .
I like her on the presidential ticket in 12 either spot would be my
thinking.
z

On 6/5/2010 7:54 PM, Tim wrote:
>
http://www.newsmax.com/InsideCover/michele-bachmann-minnesota-republican/201
0/06/05/id/361135
> 
> I think more&  more people are waking up. A good sign is when newspapers
start writing stories like this
> 
> 
>   
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] XV50 cooling

[Geoffrey Mackenzie-Kennedy]

Don,

Thank you.

Yes it is the possible effect on the input L-C circuit that is my main
concern.

73,

Geoff
GM4ESD


Don Wilhelm wrote:

> Geoff,
>
> I do not have proper equipment to do a true noise figure measurement,
> but my signal generator will go down to -140 dBm, and I can give the
> number of dB above the receive noise floor for that signal strength - I
> can do that at various temperatures during the other tests.
>
> I doubt the temperature rise will affect the active devices, but a
> change in temperature *could* alter the inductors a bit which could
> detune the input circuits slightly.  At this point, that is all 
> speculation.
>
> 73,
> Don W3FPR




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] XV50 cooling

[Tom W8JI]

> Yes it is the possible effect on the input L-C circuit 
> that is my main
> concern.
>
> 73,
>
> Geoff
> GM4ESD

I would think the major concern would be elevated noise or 
change in the first stage's semiconductor device parameters 
from the receiver's input device temperature increase, not 
from tuned circuit drift or PA noise.

I can't imagine a tuned circuit wide enough to pass six 
meters drifting so far as to change sensitivity, or really 
any meaningful change on a band like six meters.

73 Tom 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] SDR-IQ

[QRZ]

Hi Joe,

Thanks for the link, do you know if Elecraft included this mod and when they
may have started doing so, and if they did, how I can tell that my K3 has
it?

With the age of this unit (#4249), I would prefer not to start modifying it
just yet, at least not until the warranty expires.

It's unfortunate for me that I wasn't aware of this short fall before
purchasing what I was told was a good solution for the lack of a panoramic
display on the K3.

Thanks to you and Don for the information.
73
George...WA1NTA

-Original Message-
From: Joe Subich, W4TV [mailto:li...@subich.com] 
Sent: Saturday, June 05, 2010 10:10 PM
To: WA1NTA; Elecraft Reflector
Subject: Re: [Elecraft] SDR-IQ


Unless you have performed the IF Output buffer gain modification

or use the Clifton Labs broadband buffer amplifier between K3 & SDR-IQ

what you see is entirely normal.

The unmodified K3 IF output is approximately 17 dB lower than the
RF signal input level.

73,

... Joe, W4TV

On 6/5/2010 9:09 PM, WA1NTA wrote:
>
>
>
> Does anyone have the correct settings for the K3 to work properly with the
> SDR-IQ? I'm sure I've got something set wrong because when I connect the
IQ
> to the IF and switch output the levels seem very low, I can see signals on
> 40 but they don't seem representative of what I am hearing and what the S
> Meter is telling me. When I switch to 17, I can't see any activity on the
> scope, but I can hear signals on the band. However when I connect the
> antenna directly to the IQ and set EXT Radio back to none, I am able to
> observe signals and tune them in on 17 with no problem.
>
> Thanks in advance.
> George
> WA1NTA

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] K3 Rear Panel Mirror Image

[Alan Sewell N5NA]

I recently created a mirror image of the K3 rear panel.  I find this 
handy to place behind my K3 to assist in plugging cables in the correct 
jacks.

Anyone who may find this of use is welcome to download it from 


73,

Alan  N5NA
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] Re： XV50 cooling

[Johnny Siu]

Hello Gentleman,

The structure and architectural of XV50 and XV144 are the same.  The proposed 
test from Don would be useful.  Eventually, we do need an official confirmation 
from Elecraft some time in due course.  Let us stay tune and wait for Don's 
test.

cheers,

Johnny VR2XMC



- 郵件原件 
寄件人﹕ Tom W8JI 
收件人﹕ Geoffrey Mackenzie-Kennedy ; d...@w3fpr.com
副本(CC) Elecraft Discussion List 
傳送日期﹕ 2010/6/6 (日) 9:43:59 PM
主題： Re: [Elecraft] XV50 cooling

> Yes it is the possible effect on the input L-C circuit 
> that is my main
> concern.
>
> 73,
>
> Geoff
> GM4ESD

I would think the major concern would be elevated noise or 
change in the first stage's semiconductor device parameters 
from the receiver's input device temperature increase, not 
from tuned circuit drift or PA noise.

I can't imagine a tuned circuit wide enough to pass six 
meters drifting so far as to change sensitivity, or really 
any meaningful change on a band like six meters.

73 Tom 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html



  

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] KDVR

[Gary Gregory]

Hmmm,

Playing back another stations audio seems to be a common request,
however, the recording when it is played back is not the "true" audio
being transmitted by the originating station so therefore it becomes
kiinda useless.

Recording and playing multiple "messages" is possible using software
such as HRD and N1MM Logger if that's any help?

Yep, would be kinda nice to have a "whoops" key to erase individual
and M1-M4 recordings. Oh well, it is still the best DVR I have had to
play with...

YMMV

Gary

On Sun, Jun 6, 2010 at 5:42 PM, juergen  wrote:
>
> Hi David
>
> A  simple way of erasing recorded messages would be nice. Blanking the entire 
> message bank would also help.
>
> A way of  resetting the recorder to the beginning would also make life easy 
> when playing back recordings. You always end up with mess of different 
> recordings that requires care and guessing when you are playing them back.
>
> I marvel  at how well my simple Sony DVR works, I wish it was in the K3. I 
> could then save my recordings  for future reference.
>
> John
>
>
> --- On Sat, 6/5/10, David Pratt  wrote:
>
>> From: David Pratt 
>> Subject: Re: [Elecraft] KDVR
>> To: "N8XPQ" 
>> Cc: elecraft@mailman.qth.net
>> Date: Saturday, June 5, 2010, 11:38 PM
>> In a recent message, N8XPQ 
>> wrote ...
>> >
>> >I have competed K# build #4354 this afternoon. I have a
>> question about the
>> >operation or capabilities of the KDVR. Is it possible
>> to playback audio from
>> >a received station, back over the air to that station?
>>
>> Yes, it is, but it's bit awkward at the moment particularly
>> if you use a
>> speaker and do not normally monitor your outgoing
>> speech.  We are told
>> that a forthcoming K3 software release will enable the
>> monitor to be
>> enabled while playing back a received station over the
>> KDVR.
>>
>> 73
>> --
>> David G4DMP
>> Leeds, England, UK
>> --
>>
>>
>>
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>



-- 
Gary
VK4FD - Motorhome Mobile
http://www.qsl.net/vk4fd/
K3 #679
For everything else there's Mastercard!!!
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] SDR-IQ

[R. Kevin Stover]

On 6/6/2010 9:10 AM, QRZ wrote:
> Hi Joe,
>
> Thanks for the link, do you know if Elecraft included this mod and when they
> may have started doing so, and if they did, how I can tell that my K3 has
> it?
>
> With the age of this unit (#4249), I would prefer not to start modifying it
> just yet, at least not until the warranty expires.
>
> It's unfortunate for me that I wasn't aware of this short fall before
> purchasing what I was told was a good solution for the lack of a panoramic
> display on the K3.
>
> Thanks to you and Don for the information.
> 73
> George...WA1NTA
>
Elecraft started including this mod in Sept of 2009.
Last sentence of the first paragraph on the pdf in the link.
If the rig is older than that you need the mod kit. If it's newer you don't.
I don't think doing an Elecraft approved and kit supplied modification 
voids the warranty.

-- 
R. Kevin Stover

ACØH

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] XV50 cooling

[Geoffrey Mackenzie-Kennedy]

Would that not depend on whether or not the source impedance presented to 
the input device has been optimised for lowest noise figure or for optimum 
power transfer? If the former then the question arises how rapidly does the 
noise figure change with small deviations from an optimum noise "match", 
even if the effective loaded Q of the input circuitry is suitable to pass 
the six metre band.

I agree that the noise figure need not be very low for terrestrial 6m, but 
6m EME requires much lower noise figures when looking away from manmade 
noise sources.

73,
Geoff.


Tom W8JI wrote:

> I would think the major concern would be elevated noise or
> change in the first stage's semiconductor device parameters
> from the receiver's input device temperature increase, not
> from tuned circuit drift or PA noise.
>
> I can't imagine a tuned circuit wide enough to pass six
> meters drifting so far as to change sensitivity, or really
> any meaningful change on a band like six meters.
>
> 73 Tom



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] SDR-IQ

[Joe Subich, W4TV]

 > Thanks for the link, do you know if Elecraft included this mod and
 > when they may have started doing so, and if they did, how I can tell
 > that my K3 has it?

The modification information indicates that it was incorporated in
production beginning about 1 Sept 2009 (RF board Rev H3 and later).

 > With the age of this unit (#4249), I would prefer not to start
 > modifying it just yet, at least not until the warranty expires.

That modification will not void the warranty if done properly
(e.g. if you don't use a torch!).  However, if you prefer to
avoid modifications, the Clifton Labs buffer is an alternative.
I messed up the link in the last response - here's the correct one:


73,

... Joe, W4TV

On 6/6/2010 10:10 AM, QRZ wrote:
> Hi Joe,
>
> Thanks for the link, do you know if Elecraft included this mod and
> when they may have started doing so, and if they did, how I can tell
> that my K3 has it?
>
> With the age of this unit (#4249), I would prefer not to start
> modifying it just yet, at least not until the warranty expires.
>
> It's unfortunate for me that I wasn't aware of this short fall
> before purchasing what I was told was a good solution for the lack of
> a panoramic display on the K3.
>
> Thanks to you and Don for the information. 73 George...WA1NTA
>
> -Original Message- From: Joe Subich, W4TV
> [mailto:li...@subich.com] Sent: Saturday, June 05, 2010 10:10 PM To:
> WA1NTA; Elecraft Reflector Subject: Re: [Elecraft] SDR-IQ
>
>
> Unless you have performed the IF Output buffer gain modification
> 
>
>
or use the Clifton Labs broadband buffer amplifier between K3&  SDR-IQ
> 
>
>
what you see is entirely normal.
>
> The unmodified K3 IF output is approximately 17 dB lower than the RF
> signal input level.
>
> 73,
>
> ... Joe, W4TV
>
> On 6/5/2010 9:09 PM, WA1NTA wrote:
>>
>>
>>
>> Does anyone have the correct settings for the K3 to work properly
>> with the SDR-IQ? I'm sure I've got something set wrong because when
>> I connect the
> IQ
>> to the IF and switch output the levels seem very low, I can see
>> signals on 40 but they don't seem representative of what I am
>> hearing and what the S Meter is telling me. When I switch to 17, I
>> can't see any activity on the scope, but I can hear signals on the
>> band. However when I connect the antenna directly to the IQ and set
>> EXT Radio back to none, I am able to observe signals and tune them
>> in on 17 with no problem.
>>
>> Thanks in advance. George WA1NTA
>
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 Rear Panel Mirror Image

[Gary, W7TEA]

Thanks Alan!!

73, Gary W7TEA

-
73,

Gary W7TEA  K3 #1001
-- 
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-Rear-Panel-Mirror-Image-tp5145531p5145593.html
Sent from the Elecraft mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 Rear Panel Mirror Image

[W0FK]

Very handy tool Alan. Thanks!

73,

Lou, W0FK


Alan Sewell N5NA wrote:
> 
> I recently created a mirror image of the K3 rear panel.  I find this 
> handy to place behind my K3 to assist in plugging cables in the correct 
> jacks.
> 
> Anyone who may find this of use is welcome to download it from 
> 
> 
> 73,
> 
> Alan  N5NA
> 
> 
> 


-
St. Louis, MO
K3 #2513
-- 
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-Rear-Panel-Mirror-Image-tp5145531p5145557.html
Sent from the Elecraft mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 Rear Panel Mirror Image

[Deni]

Good show Allan, very useful.
Thanks,
Deni F5VJC

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] SDR-IQ

[QRZ]

Joe,

I guess my confusion is that if the mod was included beginning in Sept 2009
then I guess I'm back to square one with the SDR-IQ. Do you know how I can
verify that the mod was done before I try another solution?

Thanks and 73...
George, WA1NTA

-Original Message-
From: Joe Subich, W4TV [mailto:li...@subich.com] 
Sent: Sunday, June 06, 2010 10:55 AM
To: QRZ; Elecraft Reflector
Subject: Re: [Elecraft] SDR-IQ


 > Thanks for the link, do you know if Elecraft included this mod and
 > when they may have started doing so, and if they did, how I can tell
 > that my K3 has it?

The modification information indicates that it was incorporated in
production beginning about 1 Sept 2009 (RF board Rev H3 and later).

 > With the age of this unit (#4249), I would prefer not to start
 > modifying it just yet, at least not until the warranty expires.

That modification will not void the warranty if done properly
(e.g. if you don't use a torch!).  However, if you prefer to
avoid modifications, the Clifton Labs buffer is an alternative.
I messed up the link in the last response - here's the correct one:


73,

... Joe, W4TV

On 6/6/2010 10:10 AM, QRZ wrote:
> Hi Joe,
>
> Thanks for the link, do you know if Elecraft included this mod and
> when they may have started doing so, and if they did, how I can tell
> that my K3 has it?
>
> With the age of this unit (#4249), I would prefer not to start
> modifying it just yet, at least not until the warranty expires.
>
> It's unfortunate for me that I wasn't aware of this short fall
> before purchasing what I was told was a good solution for the lack of
> a panoramic display on the K3.
>
> Thanks to you and Don for the information. 73 George...WA1NTA
>
> -Original Message- From: Joe Subich, W4TV
> [mailto:li...@subich.com] Sent: Saturday, June 05, 2010 10:10 PM To:
> WA1NTA; Elecraft Reflector Subject: Re: [Elecraft] SDR-IQ
>
>
> Unless you have performed the IF Output buffer gain modification
> 
>
>
or use the Clifton Labs broadband buffer amplifier between K3&  SDR-IQ
> 
>
>
what you see is entirely normal.
>
> The unmodified K3 IF output is approximately 17 dB lower than the RF
> signal input level.
>
> 73,
>
> ... Joe, W4TV
>
> On 6/5/2010 9:09 PM, WA1NTA wrote:
>>
>>
>>
>> Does anyone have the correct settings for the K3 to work properly
>> with the SDR-IQ? I'm sure I've got something set wrong because when
>> I connect the
> IQ
>> to the IF and switch output the levels seem very low, I can see
>> signals on 40 but they don't seem representative of what I am
>> hearing and what the S Meter is telling me. When I switch to 17, I
>> can't see any activity on the scope, but I can hear signals on the
>> band. However when I connect the antenna directly to the IQ and set
>> EXT Radio back to none, I am able to observe signals and tune them
>> in on 17 with no problem.
>>
>> Thanks in advance. George WA1NTA
>
>

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] KDVR

[Geoffrey Downs]

Well I wouldn't say useless. I'm sure no recording is *exactly* like the 
original but I have often played back another station's transmission (eg to 
help them set up their audio to let them know how they sound over a long 
distance), and other people listening  (eg in the same net) usually say the 
KDVR3 is pretty close. I believe it's certainly close enough to be of use. 
Another way of handling it of course is to play the KDVR recording into a PC 
and email it but that's slower and less immediate.

Like you Gary I find the KDVR3 very good. All it needs to make it perfect in 
my view is the monitor tweak recently (and regularly) mentioned on the list 
and yes I too would support a way of erasing the AF REC loop. You can 
already erase M1-4 memories individually.

73 to all,

Geoff
G3UCK

- Original Message - 
From: "Gary Gregory" 
Sent: Sunday, June 06, 2010 3:32 PM
Subject: Re: [Elecraft] KDVR


Hmmm,

Playing back another stations audio seems to be a common request,
however, the recording when it is played back is not the "true" audio
being transmitted by the originating station so therefore it becomes
kiinda useless.


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] XV50 cooling

[Tom W8JI]

> Would that not depend on whether or not the source 
> impedance presented to the input device has been optimised 
> for lowest noise figure or for optimum power transfer? If 
> the former then the question arises how rapidly does the 
> noise figure change with small deviations from an optimum 
> noise "match", even if the effective loaded Q of the input 
> circuitry is suitable to pass the six metre band.

The two primary sources of noise are from current flow in 
the input device and thermal noise. I'm not sure what 
portion of the two exist in the XV50, but almost certainly 
the semiconductor characteristics would change far more 
rapidly than the impedance of relatively broadly tuned 
matching circuits.
 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] KDVR

[Merle Bone]

I have a couple of questions about the DVR that I could not find answers to in 
the manual. If you are using "Speech Processing" does the DVR record the audio 
before or after the SP when you are recording from the microphone?

Also, when you playback a message from the DVR, does the audio from the DVR go 
through the Speeech Processing if you have the SP turned On? 
Thanks & 73, Merle - W0EWM
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] SDR-IQ

[Joe Subich, W4TV]

 > Do you know how I can verify that the mod was done before I try
 > another solution?

Check your RF board to see if it is marked Rev H3 or later.
Also, check the resistance of the ONE resistor that was
changed.  The information is in that modification pdf.

73,

... Joe, W4TV

On 6/6/2010 11:27 AM, QRZ wrote:
> Joe,
>
> I guess my confusion is that if the mod was included beginning in Sept 2009
> then I guess I'm back to square one with the SDR-IQ. Do you know how I can
> verify that the mod was done before I try another solution?
>
> Thanks and 73...
> George, WA1NTA
>
> -Original Message-
> From: Joe Subich, W4TV [mailto:li...@subich.com]
> Sent: Sunday, June 06, 2010 10:55 AM
> To: QRZ; Elecraft Reflector
> Subject: Re: [Elecraft] SDR-IQ
>
>
>   >  Thanks for the link, do you know if Elecraft included this mod and
>   >  when they may have started doing so, and if they did, how I can tell
>   >  that my K3 has it?
>
> The modification information indicates that it was incorporated in
> production beginning about 1 Sept 2009 (RF board Rev H3 and later).
>
>   >  With the age of this unit (#4249), I would prefer not to start
>   >  modifying it just yet, at least not until the warranty expires.
>
> That modification will not void the warranty if done properly
> (e.g. if you don't use a torch!).  However, if you prefer to
> avoid modifications, the Clifton Labs buffer is an alternative.
> I messed up the link in the last response - here's the correct one:
> 
>
> 73,
>
>  ... Joe, W4TV
>
> On 6/6/2010 10:10 AM, QRZ wrote:
>> Hi Joe,
>>
>> Thanks for the link, do you know if Elecraft included this mod and
>> when they may have started doing so, and if they did, how I can tell
>> that my K3 has it?
>>
>> With the age of this unit (#4249), I would prefer not to start
>> modifying it just yet, at least not until the warranty expires.
>>
>> It's unfortunate for me that I wasn't aware of this short fall
>> before purchasing what I was told was a good solution for the lack of
>> a panoramic display on the K3.
>>
>> Thanks to you and Don for the information. 73 George...WA1NTA
>>
>> -Original Message- From: Joe Subich, W4TV
>> [mailto:li...@subich.com] Sent: Saturday, June 05, 2010 10:10 PM To:
>> WA1NTA; Elecraft Reflector Subject: Re: [Elecraft] SDR-IQ
>>
>>
>> Unless you have performed the IF Output buffer gain modification
>> 
>>
>>
> or use the Clifton Labs broadband buffer amplifier between K3&   SDR-IQ
>> 
>>
>>
> what you see is entirely normal.
>>
>> The unmodified K3 IF output is approximately 17 dB lower than the RF
>> signal input level.
>>
>> 73,
>>
>> ... Joe, W4TV
>>
>> On 6/5/2010 9:09 PM, WA1NTA wrote:
>>>
>>>
>>>
>>> Does anyone have the correct settings for the K3 to work properly
>>> with the SDR-IQ? I'm sure I've got something set wrong because when
>>> I connect the
>> IQ
>>> to the IF and switch output the levels seem very low, I can see
>>> signals on 40 but they don't seem representative of what I am
>>> hearing and what the S Meter is telling me. When I switch to 17, I
>>> can't see any activity on the scope, but I can hear signals on the
>>> band. However when I connect the antenna directly to the IQ and set
>>> EXT Radio back to none, I am able to observe signals and tune them
>>> in on 17 with no problem.
>>>
>>> Thanks in advance. George WA1NTA
>>
>>
>
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] K2REMOTE ?

[n0jrn]

Morning gang:

Been playing with K2REMOTE and was curious about a couple of it's features.

At the bottom of the window are

" Test TX String "   &  " Debug RX Window "

Not being a real avid control software user,  I haven't figured out what 
those are used for.  Figure I would ask the group and see what I'm missing.

Thanks to all and have a great day:

73 Jerry N0JRN 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] KDVR

[Tom W8JI]

> Well I wouldn't say useless. I'm sure no recording is 
> *exactly* like the
> original but I have often played back another station's 
> transmission (eg to
> help them set up their audio to let them know how they 
> sound over a long
> distance), and other people listening  (eg in the same 
> net) usually say the
> KDVR3 is pretty close. I believe it's certainly close 
> enough to be of use.
> Another way of handling it of course is to play the KDVR 
> recording into a PC
> and email it but that's slower and less immediate.

I have a problem with that idea.

When I listen to the other station I hear his audio colored 
by everything between his mouth and my ear. That would 
include his mic, his audio system and transmitter, 
propagation effects like multipath or noise, my receiver 
characteristics, my speaker or headphones, and my hearing.

When I record him and play it back the audio is colored by 
his mic, his audio system and transmitter, propagation 
effects like multipath or noise to me, my receiver 
characteristics, my recorder, my transmitter audio 
characteristics, propagation effects again but back to him, 
his entire receiver system, his speaker or headphones, and 
his hearing.

I often shake my head in disbelief when I witness audio 
playbacks as a disinterested third party, because what I 
hear that is being recorded is rarely like what I hear being 
played back as an example of how the fellow sounds. It isn't 
what the first party sounds like, it is what the first party 
sounds like after being run in and out through a different 
receiver and different transmitter. The recorder is the 
least of the worries.

Which leads me to a question...

In the K3, is the DVR playback run out through the 
transmitter on a wide bandwidth and perfectly flat so the 
playback is at least a reproduction of what the receiver 
wound up creating, or is the playback run though the 
equalizer at the custom settings of the K3 transmitter's 
owner?

To me, this is one of the silliest ways to adjust audio. An 
on-site receiver with wide bandwidth and a good set of 
headphones (or local recorder) is far more meaningful.

One of the most annoying things to me is someone recording 
me and, with his S3 signal from a wet noodle antenna, saying 
"this is how good you sound here".
:-)

73 Tom 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 S/N 4359 - It's Alive! (And Thanks)

[Jim / W6JHB]

Roughly about 10 hours, and I really took my time. Did it over about 2-1/2
days. That includes ALL parts inventory and the clean-up from dumping the
parts bin into the unit halfway through! It truly was a piece of cake. 
-- 
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-S-N-4359-It-s-Alive-And-Thanks-tp5141556p5146285.html
Sent from the [K3] mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 S/N 4359 - It's Alive! (And Thanks)

[Alan D. Wilcox]

Hi Jim,
Glad to hear you were successful. It's always nice to hear a story with a happy 
ending. :)
Alan
 
Alan D. Wilcox, W3DVX (K2-5373, K3-40)
570-321-1516
http://WilcoxEngineering.com
Williamsport, PA 17701 



Jim / W6JHB wrote:
> Roughly about 10 hours, and I really took my time. Did it over about 2-1/2
> days. That includes ALL parts inventory and the clean-up from dumping the
> parts bin into the unit halfway through! It truly was a piece of cake. 
>   

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] 43 ft Vertical & Balun

[David Little]

Those of you who a thinking about a 43 ft vertical or how to feed it might 
read the links I have provided you here.
I have built a 43 ft vertical from a 50 ft telescoping Rohn push-up pole. I 
am using a mesh ground system under it
thanks to Home Depot's  4ft x 7 ft mesh sheets linked together, radial 
wires, grounding rods, and a homebrew balun.
I am using a K2 with ATU and 100 watts through a short run of LMR400 coax to 
the base of the antenna where the
balun is located. The 43 ft vertical also supports my windom. The windom is 
insulated from the vertical.

Below are several links on the 43 ft antenna including the AD5X info on how 
to build your own balun. I based my
balun on his and it works fine. If you do not wish the build your own balun, 
a great one can be purchased from
Balun Desins LLC. They offer two models for low and high power. The links 
are all there.

http://vk1od.net/antenna/multibandunloadedvertical/index.htm
http://www.balundesigns.com/servlet/the-Ununs-for-Verticals-%26-Longwires/Categories
http://www.ad5x.com/images/Articles/Match160.pdf
http://www.ad5x.com/images/Presentations/Vertical43.pdf

73
Dave Little, AF5U 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] How to test serial communications?

[Pete Smith]

Today we had a heavy lightning storm pass through the area.  All of my 
antennas were disconnected, as were all the control cables, but the 
computer and my new K3 were still on.  When I returned to the shack 
after the storm, everything appears to be working normally *except* that 
none of my software can communicate with the K3.  The radio shows no 
error messages, and transmits and receives normally - just no 
communications.  Alas, I have no other serial devices in the shack, and 
my backup computer does not have a serial port, so I can't test to 
determine whether it is the port on the computer or the KIO3.

Is there any diagnostic that can be performed in the K3 to determine if 
in fact something's blown on the KIO3 board?

-- 
73, Pete N4ZR

The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at 
reversebeacon.blogspot.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] 43 ft Vertical & Balun

[Phil LaMarche]

I have a 43 ft vertical from Zero Five and I purchased the switching balun
from Phil after it was featured in QST.  I switch back and forth from the
PRO67B at 72 ft and the vertical and am amazed how good the vertical works.
The ground is the key.

Phil 


Philip LaMarche
 
LaMarche Enterprises, Inc
p...@lamarcheenterprises.com
www.LaMarcheEnterprises.com 
 
727-944-3226
727-937-8834 Fax
727-510-5038 Cell 
 
www.w9dvm.com
 
K3 #1605
 
CCA 98-00827
CRA 1701
W9DVM
 

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Little
Sent: Sunday, June 06, 2010 2:13 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] 43 ft Vertical & Balun

Those of you who a thinking about a 43 ft vertical or how to feed it might
read the links I have provided you here.
I have built a 43 ft vertical from a 50 ft telescoping Rohn push-up pole. I
am using a mesh ground system under it thanks to Home Depot's  4ft x 7 ft
mesh sheets linked together, radial wires, grounding rods, and a homebrew
balun.
I am using a K2 with ATU and 100 watts through a short run of LMR400 coax to
the base of the antenna where the balun is located. The 43 ft vertical also
supports my windom. The windom is insulated from the vertical.

Below are several links on the 43 ft antenna including the AD5X info on how
to build your own balun. I based my balun on his and it works fine. If you
do not wish the build your own balun, a great one can be purchased from
Balun Desins LLC. They offer two models for low and high power. The links
are all there.

http://vk1od.net/antenna/multibandunloadedvertical/index.htm
http://www.balundesigns.com/servlet/the-Ununs-for-Verticals-%26-Longwires/Ca
tegories
http://www.ad5x.com/images/Articles/Match160.pdf
http://www.ad5x.com/images/Presentations/Vertical43.pdf

73
Dave Little, AF5U 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] K2 ATU and 43-ft Vertical

[Edward R Cole]

I am using a top-loaded 43 foot vertical (43x130-foot inverted-L) on 
495.6 KHz (600 meters).  The antenna Z = 0.81 - j681.5 from EzNEC.  I 
built an air coil from #12 thhn copper wire (ordinary solid conductor 
electrical housewire) roughly 10-in diam by 10-inch long 39 turns and 
tapped it about 3/4 for a match.  A tap at 2-1/2 turns matches 
50-ohms coax to the xmtr which is a converted 100w NDB (aviation 
non-directional beacon).
Details at:  http://www.kl7uw.com/600m.htm

The base loading coil is nearly identical in design to the toroidal 
coil of AD5X, linked below.  I do intend to find 160 & 80m tap 
locations for the antenna.

One thing I wanted to share was that I am using 2-foot chicken wire 
as ground radials lying on the ground.  They are obviously short on 
600m (1/4 Wave = 496 feet).  Two radial are 50-foot long and one is 
70-foot long.  I am using the shield of my 1-5/8 inch Heliax hardline 
coax as the fourth radial (it is 120-foot long and has ground rod at each end).

With a modified MFJ-269B, I get a measured Z = 20 + j0; the 50-ohm 
tap sees Z = 63 + j15 for SWR=1.3  antenna efficiency is 4% 
(ERP=4.15w for 100w xmtr output).  With this I have been heard in BC 
over 1300-miles away (not in the prime DX season).

73, Ed - KL7UW
--

Message: 15
Date: Sat, 5 Jun 2010 18:26:41 -0500
From: "Bob Naumann" 
Subject: Re: [Elecraft] K2 ATU and 43-ft Vertical
To: 
Message-ID: <017001cb0506$8e203850$aa60a8...@com>
Content-Type: text/plain;   charset="us-ascii"

As Don mentioned, the 2-part article in QST was written by AD5X and can also
be seen here:

http://www.ad5x.com/images/Articles/Match160.pdf

I  built one of these "matching networks" (it's not a tuner) for my 43'
vertical and it works very well on 160, 80 and up. The AD5X matching network
is a very clever design and makes tuning of this short radiator quite easy
as it offsets the huge capacitive reactance of these antennas and even
allows control of the relays right over your feedline. Very slick.

I have a Zero Five vertical and it is made very well, has been up about 3
years and still looks brand new. The only difference is that with the AD5X
matcher I can tune it on 160 and 80 now!

The feedline makes a huge difference primarily due to the loss that will
impact your performance with poor SWR. If you have a lossy feedline (like
RG8X like I used at first) the antenna will appear to match pretty easily.
If you switch (like I did to 1/2" hardline, with its much lower loss) you'll
see the impact of all of that capacitive reactance in making tuning of the
43' antenna very difficult especially on 160 and 80. In fact, I could not
match it at all on 160.

73,

Bob W5OV



73, Ed - KL7UW, WD2XSH/45
==
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 144-600w, 432-100w, 1296-60w, 3400-fall 2010
DUBUS Magazine USA Rep dubus...@hotmail.com
==

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] How to test serial communications?

[Vic K2VCO]

On 6/6/2010 12:13 PM, Pete Smith wrote:
>  Alas, I have no other serial devices in the shack, and
> my backup computer does not have a serial port, so I can't test to
> determine whether it is the port on the computer or the KIO3.
>
> Is there any diagnostic that can be performed in the K3 to determine if
> in fact something's blown on the KIO3 board?

I am not sure, but you certainly can test the serial port con the computer. 
Just jump pins 
2 and 3 of the connector (or cable) coming from the computer and activate any 
terminal 
program. Set it for no handshaking. If the port is working, you should see an 
echo of 
anything you type.
-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] How to test serial communications?

[Jim Brown]

On Sun, 06 Jun 2010 15:13:57 -0400, Pete Smith wrote:

>Is there any diagnostic that can be performed in the K3 to determine if 
>in fact something's blown on the KIO3 board?

Pete,

One of the things that lightning create errors in or modify digital memory. 
One thing I would try is going into the K3 menu and re-setting anything 
associated with digital comm, like bit rate, etc. Then do the same thing in 
your computer. If that solves the problem, there may be other errors lucking 
about. :) 

73, Jim K9YC


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] How to test serial communications?

[R. Kevin Stover]

I assume you're restarted both the computer and the K3.
You need to eliminate either the computer or the K3 as the problem.
Test the computer serial port by following these instructions.

http://www.reliableracing.com/downloads/LoopBackTest.pdf

If the port talks to itself the problem is with the K3.

On 6/6/2010 2:13 PM, Pete Smith wrote:
> Today we had a heavy lightning storm pass through the area.  All of my
> antennas were disconnected, as were all the control cables, but the
> computer and my new K3 were still on.  When I returned to the shack
> after the storm, everything appears to be working normally *except* that
> none of my software can communicate with the K3.  The radio shows no
> error messages, and transmits and receives normally - just no
> communications.  Alas, I have no other serial devices in the shack, and
> my backup computer does not have a serial port, so I can't test to
> determine whether it is the port on the computer or the KIO3.
>
> Is there any diagnostic that can be performed in the K3 to determine if
> in fact something's blown on the KIO3 board?
>
>

-- 
R. Kevin Stover

ACØH

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 S/N 4359 - It's Alive! (And Thanks)

[Jim / W6JHB]

Hi Alan - thanks! It was fun to build (although I do miss the smell of that
rosin core solder) - gotta get a KX1 for Christmas!
-- 
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-S-N-4359-It-s-Alive-And-Thanks-tp5141556p5146721.html
Sent from the [K3] mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 S/N 4359 - It's Alive! (And Thanks)

[Jim / W6JHB]

WA5ZZT wrote:
> 
> 
> Thanks.  I just started looking at them seriously. I am in Dallas and
> Hamcom is next Friday so I thought I would take a look at them again.  I
> was thinking about getting the 100watt kit and then adding to it later. 
> Is that a good way to go or is it hard to add modules after it's built?
> 
> 

>From what I've seen, it is a snap to add modules. In fact, the XYL pinched
my pocketbook when I was getting ready to order and I had to cut the KBPF3
(General Coverage band pass filter module) and the associated 6KHz crystal
filter from my list. As I built the rig, I saw how easy it'll be to add
those two items when dollars are a tad more available. In the case of these
two items, it simply requires taking out a few small screws holding the top
cover in place, plugging in the KBPF3, removing the front half of the bottom
cover and inserting the new crystal filter & retaining screw. Bolt the
covers back on, run the K3 Utility software and let the K3 know about the
new stuff just installed.

My build of the K3 included the KAT3 internal antenna tuner, the 100-watt
amp, and two additional crystal filters. Those were the the only options I
went for on this go-round.

I sold off a K2 and an Icom 756 Pro III to get this rig, and so far I'm
quite impressed. Now, if the sun would cooperate and get spotty, I'd really
be happy. Today's conditions on 20 meters in north central California are
pathetic - almost ZERO signals heard. Last night I was running only 30w into
a crummy Buddistick and I worked KH6AT over in Hilo, HI on 40 CW - my first
K3 QSO. (And Bryce was also running a K3)

73, Jim / W6JHB
-- 
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-S-N-4359-It-s-Alive-And-Thanks-tp5141556p5146732.html
Sent from the [K3] mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] NAQCC Sprint Tuesday night!

[NAQCC]

NAQCC Sprint Tuesday night!

This coming Tuesday evening will be the monthly NAQCC Sprint for June, 2010.

I will refer you to the proper URL:

http://home.windstream.net/yoel/sprint201006.html

There you will find all the details as to time, frequencies and also a special 
prize.

This month's Special Prize goes to the winner, to be decided by drawing among 
all who submit a valid log, gets a choice of paddle handles, straight key 
knobs, and/or K2 knob inserts donated by Gregg WB8LZG.

This is a monthly event that caters to the CW veteran, the CW newcomer, 
straight key and bug fans. All are welcome to participate (this includes QRO); 
but you must use QRP power levels to compete for awards.

Come join us and have a real good time!

72/73 de Dave VA3RJ
NAQCC #0004

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3 S/N 4359 - It's Alive! (And Thanks)

[Jim Miller KG0KP]

Happy BEGINNING 

73, de Jim KG0KP

- Original Message - 
From: "Alan D. Wilcox" 
To: "Jim / W6JHB" ; "elecraft" 
Sent: Sunday, June 06, 2010 2:06 PM
Subject: Re: [Elecraft] K3 S/N 4359 - It's Alive! (And Thanks)


> Hi Jim,
> Glad to hear you were successful. It's always nice to hear a story with a 
> happy ending. :)
> Alan
>
> Alan D. Wilcox, W3DVX (K2-5373, K3-40)
> 570-321-1516
> http://WilcoxEngineering.com
> Williamsport, PA 17701
>
>
>
> Jim / W6JHB wrote:
>> Roughly about 10 hours, and I really took my time. Did it over about 
>> 2-1/2
>> days. That includes ALL parts inventory and the clean-up from dumping the
>> parts bin into the unit halfway through! It truly was a piece of cake.
>>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] KDVR

[Gary Gregory]

Tom,

Exactly my thoughts.

I too have witnessed these types of QSO's and I came to the same
conclusion that what I heard from the station playing back a recorded
transmission did not sound anywhere close to what I heard "live".

Oh well, to each his/her own eh?

But I still would like to see the Monitor "mute" option come to pass.

73's
Gary

On Mon, Jun 7, 2010 at 4:16 AM, Tom W8JI  wrote:
>> Well I wouldn't say useless. I'm sure no recording is *exactly* like the
>> original but I have often played back another station's transmission (eg
>> to
>> help them set up their audio to let them know how they sound over a long
>> distance), and other people listening  (eg in the same net) usually say
>> the
>> KDVR3 is pretty close. I believe it's certainly close enough to be of use.
>> Another way of handling it of course is to play the KDVR recording into a
>> PC
>> and email it but that's slower and less immediate.
>
> I have a problem with that idea.
>
> When I listen to the other station I hear his audio colored by everything
> between his mouth and my ear. That would include his mic, his audio system
> and transmitter, propagation effects like multipath or noise, my receiver
> characteristics, my speaker or headphones, and my hearing.
>
> When I record him and play it back the audio is colored by his mic, his
> audio system and transmitter, propagation effects like multipath or noise to
> me, my receiver characteristics, my recorder, my transmitter audio
> characteristics, propagation effects again but back to him, his entire
> receiver system, his speaker or headphones, and his hearing.
>
> I often shake my head in disbelief when I witness audio playbacks as a
> disinterested third party, because what I hear that is being recorded is
> rarely like what I hear being played back as an example of how the fellow
> sounds. It isn't what the first party sounds like, it is what the first
> party sounds like after being run in and out through a different receiver
> and different transmitter. The recorder is the least of the worries.
>
> Which leads me to a question...
>
> In the K3, is the DVR playback run out through the transmitter on a wide
> bandwidth and perfectly flat so the playback is at least a reproduction of
> what the receiver wound up creating, or is the playback run though the
> equalizer at the custom settings of the K3 transmitter's owner?
>
> To me, this is one of the silliest ways to adjust audio. An on-site receiver
> with wide bandwidth and a good set of headphones (or local recorder) is far
> more meaningful.
>
> One of the most annoying things to me is someone recording me and, with his
> S3 signal from a wet noodle antenna, saying "this is how good you sound
> here".
> :-)
>
> 73 Tom
>



-- 
Gary
VK4FD - Motorhome Mobile
http://www.qsl.net/vk4fd/
K3 #679
For everything else there's Mastercard!!!
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] Elecraft SSB net results (6-6-10)

[Phillip Shepard]

Conditions on 20 meters at net time were terrible again this week. I could
only copy two stations east of the Mississippi River.  No discussions took
place during the 18 minute net, but AE6IC said that he was running NR at
F8-1 and wondered if anyone else was similarly configured.  No one answered
him.  There were 13 of us in total.

Here is the list of the group:

Station NameQTH Rig S/N


AE6IC   FredCA  K3  2241
W0FMTerry   MO  K3  474
AC9DDickCA  K3  3697
K4GCJ   Gerry   NC  K3  1597
W4RKS   Jim AL  TS820 (K3 is still down)
W0RSR   MikeCO  K2  5767
AC0NM   Glenn   AZ  K3  2843
NT5QDan NM  K3  4189
KD7GC   AlanAZ  IC775DSP
KL7QOW  MikeAK  K3  3114
W6WOV   PhilCA  TS830
K7HRT   Pat WA  FTDX5000D
NS7PPhilOR  K3  1826


73,

Phil, NS7P



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] build?

[ussv dharma]

I ordered the osc kit from elecraft, but find that the parts are so small that 
my 75 year old eyes just wont do the job.

I emailed a couple of the "builders available" but get no response.

Anyone interested in building this "thing-a-ma-bob" (there that tells my age) 
for me?

Susan
If you don't change direction you WILL arrive exactly where you're 
headed!! Susan Meckley, Skipper W7KFI-mm  AFA9SM USSV 
DHARMA 


--- On Sun, 6/6/10, Merle Bone  wrote:

> From: Merle Bone 
> Subject: [Elecraft]  KDVR
> To: elecraft@mailman.qth.net
> Date: Sunday, June 6, 2010, 7:04 AM
> I have a couple of questions about
> the DVR that I could not find answers to in the manual. If
> you are using "Speech Processing" does the DVR record the
> audio before or after the SP when you are recording from the
> microphone?
> 
> Also, when you playback a message from the DVR, does the
> audio from the DVR go through the Speeech Processing if you
> have the SP turned On? 
> Thanks & 73, Merle - W0EWM
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K2 ATU and 43-ft Vertical

[Tom W8JI]

> The base loading coil is nearly identical in design to the 
> toroidal
> coil of AD5X, linked below.  I do intend to find 160 & 80m 
> tap
> locations for the antenna.

I hope you have serious top loading.

I have a video of a base loading coil throwing a two inch 
long arc when running 500 watts on 160 meters into a 43-foot 
vertical that is mounted over a good ground system. It 
looked like the Northern Lights from Macon.:-)

73 Tom 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] [KX1] New KX1 Kit...

[Phil Hystad]

I got a new KX1 kit along with the 30/80 band addition at the Elecraft booth at 
SEAPAC this weekend.  Now, all I need is the time to put it together.  I am 
willing to trade my Norcal 40A for 15-hours of someone's spare time.  You can 
e-mail the hours.

So, I am thinking though that I want to take the easy route and have someone do 
my toroids for me.  Along with the KX1, I got sheet of paper describing a 
toroid winding service from Toroid Guy.  Any recommendations.  The $9 price for 
the KX1 seems hard to beat, I paid more then that for my glass of wine with 
dinner last night.

Thanks for any comments.

73, phil, K7PEH

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K2 Tuner and 43 ft. vertical

[Phillip Zminda]

I have a Zero-Five 43 ft. verttcal and a K2. I use the KAT-2 built-in  
tuner with it. It tunes on all bands 80 through 10 meters with no  
difficulty. I don't have the 160 board in the K2 so can't comment on  
160 with this tuner. I have about 50 radials, most 43 ft long and a  
little over 150 ft of Bury-Flex coax. This antenna would not tune well  
on 80 and didn't tune on 160 at all  with an LDG AT100Pro  auto- 
tuner.  With a Palstar  tuner I can tune 160 easily with this antenna.  
I suspect that the K2 tuner would be OK on 160 also.

As for the antenna, it's built like a tank. It's very easy to assemble  
and works well for me chasing DX on 40 and 80. If you have questions,  
you can speak directly with Tom the owner, just like dealing with  
Elecraft. A lot of guys speak negatively about this antenna design and  
show all the reasons it shouldn't work. All I can say is it works for  
me.

Phil N3ZP
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] Would you be interested in a K2 PSK31 digital interface card?

[NQ3RP]

I've tried to find one of EA3BLQ's interface cards for the K2 but have not
been successful. So I thought I would design a replacement since I've done
PCB designs before.  The problem is that if I do it, to keep the cost down,
I would have to make a couple of dozen boards.  So I wondered if there was
any interest out there in obtaining one of his boards.  My main interest is
in making the K2DI VIII board on this page
http://www.qsl.net/ea3blq/k2di_pci_tec_ang.htm .  If you would like one
please post a reply here.  If I get enough responses I'll see about doing
the run.  If you want the K2DI PCI card also please state that also.  If I
get two dozen the cost should be about $20 per board ($40 for the two).  
If you would like a complete kit state that also.  I could do the kit for
around $49.50 for both boards and the electronic parts.
-- 
View this message in context: 
http://elecraft.365791.n2.nabble.com/Would-you-be-interested-in-a-K2-PSK31-digital-interface-card-tp5147084p5147084.html
Sent from the Elecraft mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] [KX1] New KX1 Kit...

[Don Wilhelm]

Phil,

I am emailing 15 hours right now :-)  - please send the NC-40A!

More important than the toroids for the KX1, you will need the toroids 
for the KXB3080 which are more difficult than usual to wind correctly.  
So add another $10 to that toroid price and add the shipping that 
Mychael charges.  It is really a great service and his toroids are quite 
professional.

73,
Don W3FPR

Phil Hystad wrote:
> I got a new KX1 kit along with the 30/80 band addition at the Elecraft booth 
> at SEAPAC this weekend.  Now, all I need is the time to put it together.  I 
> am willing to trade my Norcal 40A for 15-hours of someone's spare time.  You 
> can e-mail the hours.
>
> So, I am thinking though that I want to take the easy route and have someone 
> do my toroids for me.  Along with the KX1, I got sheet of paper describing a 
> toroid winding service from Toroid Guy.  Any recommendations.  The $9 price 
> for the KX1 seems hard to beat, I paid more then that for my glass of wine 
> with dinner last night.
>
> Thanks for any comments.
>
> 73, phil, K7PEH
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>   
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] K2 BFO problem - need suggestions

[Elmore's]

Greetings everyone,
I have a 4+ year old K2 which has provided spotless service for me until 
recently. I began to have an audio issue in that on power up I would not 
have audio. I could get it back intermittently by either powering down and 
back up or by switching through the modes.
In doing some basic troubleshooting I discovered that by touching the 
L33 coil in the BFO I would have audio again. While checking the BFO 
frequency using the internal frequency counter I discovered that when I did 
not have audio the frequency was reading either 4.5 or 5.5 Mhz depending on 
the sideband selected. After regaining audio the frequency would be back at 
4.9 MHz.
Thus, it appears the oscillator is oscillating but at an incorrect 
frequency until I introduce my body capacitance.
Can anyone help me in troubleshooting so that I could isolate the 
component or does anyone know of the most likely cause of such a problem?
Thanks fo your help,
Jim WA4YWM 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K2 Tuner and 43 ft. vertical

[Tom W8JI]

> Elecraft. A lot of guys speak negatively about this 
> antenna design and
> show all the reasons it shouldn't work. All I can say is 
> it works for
> me.

Hi Phil,

"Works for me" is fine. No one can argue with that. That 
doesn't mean it has reasonable efficiency. If it had 
reasonable efficiency, it would be very difficult to load up 
on 160 and 80 meters. That's not being negative, it is just 
a simple fact of life.

The base impedance of a 43 foot vertical with a reasonable 
ground on 160 meters is  about 4 - J 750 ohm. To actually 
get 500 watts into that antenna, a tuner at the antenna base 
would have to supply 7900 volts RMS (11 kV peak) at almost 
11 amperes.

The 50-ohm SWR of a 43 foot vertical on 160 is over 100:1. 
On 80 it is at least 50:1 SWR. Plug the impedances into a 
transmission line loss calculator and see how it comes out. 
The loss of 150 feet of Bury Flex is about 20 dB into that 
impedance on 160 meters.

The reason it loads up with a standard tuner is because the 
150 foot transmission line is a huge attenuator pad on 160.

That doesn't mean you won't make contacts, it simply means 
the signal is 20 dB or more weaker than it could be with 
proper matching. Where we might be 30 over 9 with proper 
matching, with a remote tuner it will be 10 over nine or 
less. 20 dB loss (or even more) will still allow contacts. 
It will still make some people quite happy. I'm proud of my 
mobile signal on 160, and I've even worked Australia and 
Japan on CW and Europe on 160 SSB. It is about 1% efficient 
also, and it makes me quite happy. I'd be happier with 
another 20 dB, but that isn't possible with an 8-foot long 
mobile antenna on 160.

73 Tom 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K2 ATU and 43-ft Vertical

[Alan Bloom]

I happened to be down at Harbor Freight yesterday and noticed they have
20-foot telescoping aluminum flag poles on sale for $55.  That should
make a good vertical on 40-10 meters (almost 5/8 wave on 10) with maybe
a little bit of top-loading needed on 40.  It even comes with an
American flag.  :=)

Al N1AL


On Sun, 2010-06-06 at 20:06 -0400, Tom W8JI wrote:
> > The base loading coil is nearly identical in design to the 
> > toroidal
> > coil of AD5X, linked below.  I do intend to find 160 & 80m 
> > tap
> > locations for the antenna.
> 
> I hope you have serious top loading.
> 
> I have a video of a base loading coil throwing a two inch 
> long arc when running 500 watts on 160 meters into a 43-foot 
> vertical that is mounted over a good ground system. It 
> looked like the Northern Lights from Macon.:-)
> 
> 73 Tom 


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K2 BFO problem - need suggestions

[Don Wilhelm]

Jim,

That behavior is indicative of a bad solder connection.  The main 
components in the BFO area are X3 and X4, C173 and C174, D37 and D38, 
L33, and RP6.  The path to the TP2 BFO counter probe also includes Q24, 
C169, R98 and C168, but since the  problem seems to be frequency 
oriented, I would suggest that the last list is only of secondary concern..

On a 4 year old K2, I believe you have the yellow core toroid at L33.  
You may do well to upgrade with the BFOMDKT which will provide an extra 
degree of temperature stability for the BFO.  If you have the L33 toroid 
wound with #36 wire (many turns, comes pre-wound), then you already have 
that mod installed.

It is also possible that you have a bad BFO crystal, but check out the 
other possibilities before reaching that conclusion.  Of course, if you 
have to order parts from Elecraft, it is probably more economical to 
just order the BFO crystals at the same time whether they are needed or not.

73,
Don W3FPR

Elmore's wrote:
> Greetings everyone,
> I have a 4+ year old K2 which has provided spotless service for me until 
> recently. I began to have an audio issue in that on power up I would not 
> have audio. I could get it back intermittently by either powering down and 
> back up or by switching through the modes.
> In doing some basic troubleshooting I discovered that by touching the 
> L33 coil in the BFO I would have audio again. While checking the BFO 
> frequency using the internal frequency counter I discovered that when I did 
> not have audio the frequency was reading either 4.5 or 5.5 Mhz depending on 
> the sideband selected. After regaining audio the frequency would be back at 
> 4.9 MHz.
> Thus, it appears the oscillator is oscillating but at an incorrect 
> frequency until I introduce my body capacitance.
> Can anyone help me in troubleshooting so that I could isolate the 
> component or does anyone know of the most likely cause of such a problem?
> Thanks fo your help,
> Jim WA4YWM 
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>   
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] [KX1] New KX1 Kit...

[Phil Hystad]

don,

I didn't see the hours attached to your message.  Did you use the right MIME 
encoding?

Yes, I know about the 3080 toroids and this is probably the main reason that I 
decided to look into having someone wind them for me.  And, yes, I forgot to 
include the full price for both sets but my glass of wine actually cost me 
$12.50 and my wife's glass was $9 so we still paid more for wine then the cost 
of winding toroids.  Of course there is postage too.

phil


On Jun 6, 2010, at 6:22 PM, Don Wilhelm wrote:

> Phil,
> 
> I am emailing 15 hours right now :-)  - please send the NC-40A!
> 
> More important than the toroids for the KX1, you will need the toroids for 
> the KXB3080 which are more difficult than usual to wind correctly.  So add 
> another $10 to that toroid price and add the shipping that Mychael charges.  
> It is really a great service and his toroids are quite professional.
> 
> 73,
> Don W3FPR
> 
> Phil Hystad wrote:
>> I got a new KX1 kit along with the 30/80 band addition at the Elecraft booth 
>> at SEAPAC this weekend.  Now, all I need is the time to put it together.  I 
>> am willing to trade my Norcal 40A for 15-hours of someone's spare time.  You 
>> can e-mail the hours.
>> 
>> So, I am thinking though that I want to take the easy route and have someone 
>> do my toroids for me.  Along with the KX1, I got sheet of paper describing a 
>> toroid winding service from Toroid Guy.  Any recommendations.  The $9 price 
>> for the KX1 seems hard to beat, I paid more then that for my glass of wine 
>> with dinner last night.
>> 
>> Thanks for any comments.
>> 
>> 73, phil, K7PEH
>> 
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> 
>>  

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] Elecraft CW Net Report for June 6th & 7th, 2010

[Kevin Rock]

Good Evening,
   I must admit the census this year is so efficient that I have been counted 
four times thus far :)  I just got another visit by a census taker to be 
counted again.  Three times by visits and once by the mail.  I wonder when I 
will be fully counted?  This census taker mentioned she had been to some houses 
three times and had them on her list again.
   The nets were not great today.  The propagation was weaker than normal on 
both bands.  The forty meter net was especially tough due to the seasonal 
storms and the solar activity.  Plenty of lightning crashes made listening to 
my own sending tough.  Twenty meters had some QSB but signals were not bad at 
all.  However, some of the regularly strong ops were much weaker today while 
the normally weaker ones were stronger.  
   
   On to the lists =>

 On 14050 kHz at 2200z:
KL7QOW - Mike - AK - K3 - 3144
K1THP - Dave - CT - K3 - 686
AB9V - Mike - IN - K3 - 398
W0RSR - Mike - CO - K2 - 5767
W0CZ - Ken - ND - K3 - 457
NO8V - John - MI - K3 - 820
K6DGW - Fred - CA - K3 - 642

 On 7045.5 kHz at z:
AE6IC - Fred - CA - K3 - 2241
K0DTJ - Brian - CA - K3 - 4113
AE6IC - Fred - CA - K3 - 2241

   Hopefully the sun has injected sufficient ions into our ionosphere to 
improve propagation over the week.  I will try 6 meters by reattaching my loop 
and monitoring the calling frequency.  It is a fun band when it is open.  I 
will fix my spare HF antenna so I can monitor 10 meters on another rig.  Now to 
finish folding clothes and making my bed.  The hummingbirds need to be fed 
before dark too.
   Until next week stay well,
  73,
 Kevin.  KD5ONS  (Net Control Operator 5th Class)

-
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] Would you be interested in a K2 PSK31 digital interface card?

[Randy Moore]

I would be interested in both boards and a kit.

73,
Randy, KS4L

On Jun 6, 2010, at 7:40 PM, NQ3RP  wrote:

>
> I've tried to find one of EA3BLQ's interface cards for the K2 but  
> have not
> been successful. So I thought I would design a replacement since  
> I've done
> PCB designs before.  The problem is that if I do it, to keep the  
> cost down,
> I would have to make a couple of dozen boards.  So I wondered if  
> there was
> any interest out there in obtaining one of his boards.  My main  
> interest is
> in making the K2DI VIII board on this page
> http://www.qsl.net/ea3blq/k2di_pci_tec_ang.htm .  If you would like  
> one
> please post a reply here.  If I get enough responses I'll see about  
> doing
> the run.  If you want the K2DI PCI card also please state that  
> also.  If I
> get two dozen the cost should be about $20 per board ($40 for the  
> two).
> If you would like a complete kit state that also.  I could do the  
> kit for
> around $49.50 for both boards and the electronic parts.
> -- 
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/Would-you-be-interested-in-a-K2-PSK31-digital-interface-card-tp5147084p5147084.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] build?

[Alexey Kats]

Which kit?

If it is one of these three I can build it for you.

- XG2 Three Band Receiver Test Oscillator / S-Meter Calibrator
- N-gen Wideband Noise Generator.(100 kHz - 500 MHz)
- 2T-gen 2-Tone Test Oscillator

Send me an e-mail if you are interested.

On Sun, Jun 6, 2010 at 5:05 PM, ussv dharma  wrote:
> I ordered the osc kit from elecraft, but find that the parts are so small 
> that my 75 year old eyes just wont do the job.
>
> I emailed a couple of the "builders available" but get no response.
>
> Anyone interested in building this "thing-a-ma-bob" (there that tells my age) 
> for me?
>
> Susan
> If you don't change direction you WILL arrive exactly where you're 
> headed!! Susan Meckley, Skipper W7KFI-mm  AFA9SM USSV 
> DHARMA

-- 
Alexey Kats (neko)
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] Would you be interested in a K2 PSK31 digital interface card?

[Don Wilhelm]

This is a great effort, and I applaud John for taking up this task.  
Pauli had a great design, and I know there are many who would like to 
reproduce it..
Now to relate "the other half of the story" -- when I was offering kits 
and boards for the W3FPR Fixed Audio Output, I was amazed to find that 
one day that Pauli ordered one.  I quickly sent him an email asking why, 
since he had developed a great digital interface for the K2, and he 
replied that my solution was quite simple and elegant by comparison.  
Yes, the microphone and PTT switching must be done in an external 
interface box (many do that), but just the addition of a fixed level 
audio output alone is very helpful to working digital modes with the K2.

If you are interested in this more simplified solution, check out either 
the original design on my website www.w3fpr.com or see the updated board 
that Tom Hammond N0SS developed which mounts easily between the Front 
Panel and the Control Board.  Tom no longer offers either the kits nor 
the boards for this design, but he has offered to provide the board 
layout to anyone interested.  See www.n0ss.net for more information.  
The design is not complex and can easily be implemented on perfboard if 
you do not want to go the route of ordering a lot of boards (and selling 
them to others) from FAR circuits or other board sources.

73,
Don W3FPR

NQ3RP wrote:
> I've tried to find one of EA3BLQ's interface cards for the K2 but have not
> been successful. So I thought I would design a replacement since I've done
> PCB designs before.  The problem is that if I do it, to keep the cost down,
> I would have to make a couple of dozen boards.  So I wondered if there was
> any interest out there in obtaining one of his boards.  My main interest is
> in making the K2DI VIII board on this page
> http://www.qsl.net/ea3blq/k2di_pci_tec_ang.htm .  If you would like one
> please post a reply here.  If I get enough responses I'll see about doing
> the run.  If you want the K2DI PCI card also please state that also.  If I
> get two dozen the cost should be about $20 per board ($40 for the two).  
> If you would like a complete kit state that also.  I could do the kit for
> around $49.50 for both boards and the electronic parts.
>   
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Elecraft] LP Pan and E-MU 0202 USB for sale

[David F. Reed]

I have an LP-PAN (assembled version for K3) and an EMU-0202 USB box in 
working order that I am selling; $225 gets them including shipping in 
the continental US.

Please reply directly if interested.

Thanks & 73 de Dave, W5SV

w5sv.d...@gmail.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html