from:"tom armour"

Re: [Elecraft] OT: CW Contest logging question

2016-02-22 Thread tom armour

Where do I find the Elecraft Reflector? 

It seems to have been lost in the dust. 


> To: elecraft@mailman.qth.net
> From: n...@contesting.com
> Date: Mon, 22 Feb 2016 08:50:15 -0500
> Subject: Re: [Elecraft] OT: CW Contest logging question
> 
> Can this thread please go back to CQ-Contest where it (unfortunately) 
> belongs?
> 
> 73, Pete N4ZR
> Download the new N1MM Logger+ at
> . Check
> out the Reverse Beacon Network at
> , now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
> 
> On 2/22/2016 1:02 AM, Jim Brown wrote:
> > On Sun,2/21/2016 9:00 PM, Chester Alderman wrote:
> >>   I did go into my log and converted the 'NN' to 99;
> >
> > Back when I was learning CW and ham radio, I was taught to copy what 
> > is sent. I still do that, and that's what goes in my log. If he sends 
> > ATT, I log ATT. If he sends 1K, or 1KW, that's what i log. If he sends 
> > NN, I log NN. When I'm copying JAs, I make allowances for language 
> > when he sends 1oo and log 100. Several years ago, a lot of JAs were 
> > getting really strange with cut numbers for power, and I refused the Q 
> > if they wouldn't send me real numbers. Thankfully they have gotten the 
> > word.
> >
> > Cut numbers are for lids. I put up with ENN for 599, because the 
> > report is an anachronistic placeholder. But the structure of Morse 
> > numbers provides some redundancy (in the form of spacing) to reduce 
> > errors, and I refuse to give up that redundancy. I'm the one who gets 
> > dinged if I copy his exchange wrong.
> >
> > 73, Jim K9YC
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> >
> 
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Re: [Elecraft] K3 Mic LED Orange

2015-08-27 Thread tom armour

Maybe you put the K3 in split mode?

Tom wa4ta 

 To: elecraft@mailman.qth.net
 From: vetteresto...@gmail.com
 Date: Thu, 27 Aug 2015 12:08:39 -0700
 Subject: [Elecraft] K3 Mic LED Orange
 
 Hello All:
 
 I just installed the DVR in my K3 and now the LED above the mic control 
 is orange and always on.  What did I do?  Everything works normally, 
 including the DVR.
 
 Richard
 K7SD
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Re: [Elecraft] K3 13.8 VDC power

2014-12-22 Thread tom armour

I use one of these power supplies with a battery backup module installed 
(Model: SEC-1223BBM).  I have a deep cycle battery attached to 
it.http://www.samlexamerica.com/products/ProductDetail.aspx?pid=516The 
hot-switches to battery is very nice when power fails. Also if you happen to 
draw more than 25A it uses the battery for the difference from up to 35A.  It 
charges the battery at 5A with normal power.Tom - wa4ta

 Date: Mon, 22 Dec 2014 13:51:52 -0600
 From: rpfj...@embarqmail.com
 To: elecraft@mailman.qth.net
 Subject: Re: [Elecraft] K3   13.8 VDC power

 Wow, thanks to all for the greatly informative answers.  I gleaned many 
 good ideas from them.

 This is my concern; I am interested in protecting my K3 from damage by 
 not being shut down properly should a power interruption occur while the 
 K3 is operating. For this design, I'm thinking about a worst case 
 scenario; in transmit mode at 100 watts/20 amps, plus accessories on.

 I am concerned about Hydrogen gas while charging a lead-acid battery 
 here in the furnace room.  Since I don't need to operate by battery 
 power,  I'd like to know your thoughts about if a Gel-Cel battery of a 9 
 amp variety would handle the 20 amp load until I could go to receive 
 mode and properly shut down?
 I haven't had any experience drawing that much amperage from a gel-cel 
 momentarily.  I don't know if the load voltage would be adequate to keep 
 the K3 alive.  I'd need to test it using an older style radio.  I'm 
 hoping someone has had experience related to this.

 Thanks in advance for comments,

 Dick, n0ce

 On 12/22/2014 1:31 AM, Richard Fjeld wrote:
  Is anyone floating a battery across their power distribution?

  Dick, n0ce

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Re: [Elecraft] KAT500 tuning in combination with K3

2014-11-14 Thread tom armour

Yes that or hit the ATU TUNE button on the K3 to tune the KAT500.
Tom wa4ta

 Date: Fri, 14 Nov 2014 11:07:19 +0100
 From: p...@xs4all.nl
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] KAT500 tuning in combination with K3

 Dick,

 Now that you are 'on the air'...

 Pressing the tune button on the KAT500 means that I want to tune. 
 Wouldn't it be nice if the K3 (automatically) gives a tune signal when I 
 do that?

 Is that somewhere on the list? Or will this never become reality?

 73
 Arie

 Dick Dievendorff schreef op 14-11-2014 8:04:
  You weren't the first to ask for this. You can enable or disable antenna 
  connectors by band with the KXPA Utility. See help text and the 
  Configuration tab.

  Use current production versions of firmware and the Utility.

  73 de Dick, K6KR

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Re: [Elecraft] K3 receiver troubleshooting

2014-07-16 Thread tom armour

Also how did you fix it?
Tom - wa4ta
 Date: Wed, 16 Jul 2014 09:59:20 -0700
 To: Elecraft@mailman.qth.net
 Subject: Re: [Elecraft] Elecraft] K3 receiver troubleshooting
 From: elecraft@mailman.qth.net

 Thanks to all who offered helpful suggestions.  They were all via email - 
 you 
 notice there were no helpful postings on the reflector.  Anyway, it's 
 working 
 again and I'm a happy camper.

 So Rick..  now that you are happy what was the trouble that you found??

 Bill - K6WLM
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Re: [Elecraft] Update on a Question About the P3 SVGA and Mac Computers

2014-07-10 Thread tom armour

Why not just look at the P3 display?  Don't you need that to have the P3 SVGA?  
I don't have a P3.
What about using a Softrock Lite IF to a USB sound card on the Macbook Air?  
The Softrock Lite is about $22 but you have to build it.  You could also get a 
LP-Pan2, but you already have the P3 so you may not want to do that. 
A quick google search turned up 
this:http://www.epiphan.com/products/frame-grabbers/vga2usb/
It is $299 list price, but there should be other less expensive vga-to-usb 
devices that can be used on a Mac.
Hope that gives you a place to start.  Although I may not be understanding what 
you are asking al.  I do have a Softrock light IF to a sound card on my Windows 
PC.  I have not tried it to my Macbook Pro, but that is a company machine.
Tom - wa4ta

 From: eda...@law.du.edu
 To: elecraft@mailman.qth.net
 Date: Thu, 10 Jul 2014 20:15:43 +
 Subject: [Elecraft] Update on a Question About the P3 SVGA and Mac Computers
 
 A week or two ago I posted this question:  Would it be possible to have
 the P3's SVGA output displayed on the screen of a MacAir computer, and
 have a logging program resident on the same computer, and be able to
 toggle between the two with a simple computer keyboard stroke?  Neat trick
 for contesting if there's no room for dual monitors, eh?
 
 The simple answer (but see below) turns out to be no - with some dongling
 older Macs could operate as dumb monitors but newer ones (like my
 MacAir) cannot, a fact I had confirmed by a tech at the local Apple store.
  I was told that only the 27 monitor (too big for my space) might be able
 to do that, and maybe it couldn't either.
 
 I was referred by a member of this reflector (thank you) to a
 computer-consultant friend of his, from whom I learned that there was no
 direct way to do it but that it could be done if the P3's SVGA output
 could be made into the electronic equivalent of an Internet web site.
 Moreover, he said, that should be possible using something called
 Raspberry Pi.
 
 Right.  For an EE or computer expert, maybe; but not for a Liberal Arts
 sort of guy.  Even my Internet research about Raspberry Pi was
 entertaining but incomprehensible.  But that aside, does anyone know of a
 way to feed the P3 output into a server sort of thing and have it come out
 as something that will fool the MacAir into thinking it's a web site,
 hence toggleable vis-a-vis the resident logging program?
 
 If it turns out to be patentable I'm willing to share the royalties . . .
 
 Ted, KN1CBR
 
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Re: [Elecraft] Learning Morse Code [OT]

2014-05-28 Thread tom armour


Here are some of my resources I used for learning starting in January of 2014.  
A lot of it was already mentioned.
First note: Spend 25% of your time practicing sending code.  It helps you 
associate sound sequences with characters.  Code oscillators are good for this. 
 You can also use your rig in test mode to practice.  CW_player and FLDigi can 
decode CW from a a PC mic.
Second note: practice every day for at least 20 minutes, don't skip days.
Third note: get on the air as soon as you can.  Even if you cannot copy 
perfectly.  Send QRS or AGN or ? if you didn't get something.

My preferred software was cw_player to get started and FLDigi once I was 
primarily playing text files.
Here are some good 
tips:http://www.skccgroup.com/member_services/beginners_corner/
skccgroup is an excelent resource.
---
Getting started: (random characters and text players)
CW Player: http://www.f6dqm.fr/software.htm
Just Learn Morse Codehttp://www.justlearnmorsecode.com/
g4fon Koch trainer:http://www.g4fon.net/CW%20Trainer.htm
Learn CW Online:http://lcwo.net/

FLDigi is harder to set up, but probably the cleanest CW sender of text:(most 
of the other software will send CW from text files 
also)http://www.w1hkj.com/download.html
---
Additional resources:
Text files for a player: (this has character groups and words for those groups 
- get the zipped collection file)http://nfarl.org/sigCW/cwIntro.html
Morse code podcast at 
5WPM:http://aa9pw.com/category/morse-code/podcast-morse-code/He also has some 
good online resources:http://aa9pw.com/morsecode/
Nice collection of text to put into one of the CW 
players:http://www.k7qo.net/answers.zip
He also has MP3 files but I preferred to play the files through a player at the 
speed I wanted.http://www.k7qo.net/
ARRL has on air code and MP3 files:  (BTW: ARRL uses FLDigi to send their 
code)You can also get the answer file and send it through your preferred cw 
player at the speed you 
want)http://www.arrl.org/code-transmissionshttp://www.arrl.org/code-practice-files
Longer texts for players, it also has MP3's that slowly increase in 
speed:http://www.skccgroup.com/member_services/learning_center/
After you get to about 5-7wpm you can use Morse runner (10wpm minimum) to 
practice copying call signs in a simulated 
contest:http://www.dxatlas.com/morserunner/ 
Another speed trainer I haven't used yet is:http://www.rufzxp.net/
Hope that helps.
73 - Tom - wa4ta  
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Re: [Elecraft] TIP, RING,RING, Sleeve plug

2014-05-05 Thread tom armour

You probably want this 
adapter:http://www.radioshack.com/product/index.jsp?productId=12970495
But it is hard to tell without knowing what type of new computer you got.
Tom - wa4ta

 From: w...@i29.net
 Date: Mon, 5 May 2014 13:14:52 -0500
 To: Elecraft@mailman.qth.net
 Subject: [Elecraft] TIP, RING,RING, Sleeve plug

 Hi to the group

 I had my computer go bad and replaced it this week end. I have everything 
 working except my old computer had separate AF and MIC jacks. My new computer 
 has a combined AF/MIC jack. I need to find that kind of plug so I can build 
 an adaptor but I don't even know what it is called and where to get one. I 
 would hope it is something Radio Shack sells as that is the only place I can 
 get parts without paying big shipping charges.

 73 and thanks for your help.

 Ken  W0CZ   w0cz at i29 dot net

 Sent from my iPad
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Re: [Elecraft] Another K3-SignaLink question

2014-03-27 Thread Tom Armour

Thanks for asking and answering this question.  This was on my list of
things to figure out.

Tom - wa4ta


On Thu, Mar 27, 2014 at 3:53 PM, Joe Harris joseph.a.har...@gmail.comwrote:

 Ed,

 See page 20 of the K3 manual, in the Line Out setting. You can set the Line
 Out level in Config, or it can be set to =PHONES, which is what it sounds
 like you have it set to.

 73,
 Joe, N1QD


 On Thu, Mar 27, 2014 at 3:09 PM, Edward F. Steinfeld 
 edw...@go-embedded.com
  wrote:

  I have just connected my SignaLink to the K3 using SignaLink supplied K3
  cables. I find the Line Out amplitude varies according to where I have
 the
  AF control set. I would have thought that Line Out was a constant signal
  level. Without setting the AF level quite high I do not get good PSK
  reception. At those levels it is too loud for my ham shack (and my wife).
  What I have I set wrong?
 
  Ed  --  KB1ZJK
 
  Edward F. Steinfeld
  25 Arbor Glen Drive
  Stow, MA 01775-1258
  Home: (978)897-3127
  Cell: (978)376-3146
  mailto::edw...@go-embedded.com
  http://www.go-embedded.com http://www.go-embedded.com/
  http://en.wikipedia.org/wiki/Mount_Steinfeld
 
 
 
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 --
 Joe Harris, N1QD
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Re: [Elecraft] [OT] Be Advised ... New Microsoft Outlook EmailSpam-Filter False-Positives Bug!

2014-03-24 Thread Tom Armour

I am in the same boat.

I added my gmail account since my wa4ta at hotmail account is not receiving
mail from QTH.net

I opened a ticket with Microsoft over a week ago.  I have received a few
messages from the list since then but not many.

Tom


On Mon, Mar 24, 2014 at 8:48 AM, ejk...@gmail.com wrote:

 FYI,
 This new process by MS is rejecting nearly all my emails to/from this
 email list.
 I don't even get my own posts back.
 I added my Gmail account to the Elecraft list and I am getting all the
 list emails there.
 This has been going on for over a week now.
 I am a member of several other lists and that mail comes through fine.
 I contacted Keith at Elecraft, he said to contact QTH.net, they said MS
 was rejecting their emails and they had contacted MS.  My email that is
 getting rejected is  wm3m at live dot com
 Emory  WM3M

 -Original Message- From: Gary W. Hvizdak
 Sent: Monday, March 24, 2014 1:40 AM
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] [OT] Be Advised ... New Microsoft Outlook
 EmailSpam-Filter False-Positives Bug!

 This past week I emailed someone (Bob in Germany) but he didn't reply so a
 few days later I emailed him again.  Upon replying to my second email, Bob
 indicated that he never received my first email!

 Fast-
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Re: [Elecraft] Button of no return

2014-03-13 Thread tom armour

I am surprised no-one mentioned this.
You can buy retention clips if you have issues with disconnects: Anderson part 
# 110G68 
They cost about 50 cents.
Can we drop this subject now?  it has been re-hashed many times.
73 - Tom - wa4ta

 Date: Thu, 13 Mar 2014 12:05:49 -0300
 From: mike.har...@horizon.co.fk
 To: elecraft@mailman.qth.net
 Subject: Re: [Elecraft] Button of no return

 I use a somewhat larger diameter than supplied cable to my K3 with a 
 four inch or so piece of the supplied cable with the PP's in line 
 crimped to it using vehicle cabling crimps.  Provides flexibility at the 
 K3 without adding any significant extra IR loss.

 Regards,

 Mike VP8NO

 On 13/03/2014 11:21, Roger D Johnson wrote:
  I do not dislike Power Poles and use them for many cords around my
  station. The problem is that
  my K3 is fed from the power supply using large (stiff) diameter
  conductors. Brushing up against
  these can cause them to disconnect from the K3. If the K3 is powered up,
  this can result in the K3
  going off to never-never land which requires a special, and not well
  documented, procedure to
  get it running again. I think the K3 needs a better connector here.

  73, Roger

  On 3/13/2014 9:52 AM, Mike Harris wrote:
  Not a flame just a simple power pole observation.

  Never had a problem, never fallen out (K2, K3, XV50) even when tugging
  units around, soldered not crimped, no $40. crimper, not colour blind
  so arranged the cable and connectors to match the equipment.

  Each to his own I guess.

  Regards,

  Mike VP8NO

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Re: [Elecraft] Noise, RFI ?

2014-02-19 Thread tom armour

I get this type of noise when my wife uses a laminator.  
I also get a lot of sporadic noise in the morning around the time people get up 
which I assume are hair driers and curling irons.  
It really could be anything, but probably something one of your neighbors has.  
Good luck finding it, if it continues. 
73- Tom - wa4ta

 From: phys...@mac.com
 Date: Wed, 19 Feb 2014 10:15:42 -0800
 To: Elecraft@mailman.qth.net
 Subject: [Elecraft] Noise, RFI ?

 Using my K3 I was trying to pick up a ZL2 station (New Zealand) around 18.08 
 MHz this morning (about 9:50 AM PST) when this huge noise blanketed 
 everything out.  It was about 30/9 and absolutely solid across the spectrum 
 shown on the P3.  Using my KPA500, I switched to the 20 meter band -- same 
 noise, same level, same broadband impact.

 I determined that the noise was from roughly 1400 KHz all the way up to 28.05 
 MHz.  All about 30/9.  About the time that I finished checking this full 
 MF/HF spectrum of noise it switched off.

 Then, it switched on, and stayed on for about 5 seconds, then off again.  I 
 turned on my Icom R75.  The next time the noise came on I checked it with the 
 R75 and the same noise, same 30/9 level, same broad across the bands.

 Obviously man-made or under man control as it switched on and off and was on 
 for various periods of time.  This noise seems to be close, like generated in 
 the neighborhood someplace.

 Anyone have ideas of the cause.  You noise experts (Jim?) should have ideas.  
 I was thinking maybe an arc welding machine but that is just a wild guess.  
 It sure seems to be something that can be switched on and off.  It is not 
 periodic in that the on/off switching is at varying intervals.  The longest 
 on period is about one minute, the shortest on period about 2 seconds.  And, 
 it has been quiet for the last 10 minutes or so.

 Thanks for your help.

 73, phil, K7PEH
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Re: [Elecraft] K3 to KAT500

2014-02-16 Thread tom armour

So I ordered my K3 after this discussion and decided not to get the AUX cable.  
Now subsequently there is new firmware that makes me want the AUX cable (I 
would have got it from Elecraft if I had know of the new firmware).  
If I order it from Elecraft it now costs ~$46 including shipping and waiting a 
week to get it.  
I can get this cable locally: http://www.qvs.com/specs/CC320M1-xx_S.jpg
Will that work for the AUX cable?  
K3 #7999KAT500 #1099
Thanks
73 - Tom - wa4ta

 Date: Fri, 24 Jan 2014 16:04:41 -0800
 From: j...@audiosystemsgroup.com
 To: elecraft@mailman.qth.net
 Subject: Re: [Elecraft] K3 to KAT500
 
 On 1/24/2014 3:52 PM, tom armour wrote:
  If I buy a K3/100 without auto tuner and a KAT500 is there any additional 
  cable I need (other than coax) to connect the two together?
 
 Some folks feel the need for an AUX cable to tell the KAT500 what band 
 it is on. I don't, because the KAT500 has a very fast frequency counter 
 that can figure that out with a short burst of RF.
 
  or does KAT500 come with all cable beeded to connect it to the K3?
 
 Yes.
I see a cable for KAT500 to KPA500 but not to the K3.
 
 Yes. To prevent damage to its relays, the KAT500 must be able to 
 interrupt the keying line to any power amp that is used.  It has an RCA 
 input, and an RCA output. So ONLY if you're running an amp, you need an 
 RCA-RCA between rig and KAT500, and another between KAT500 and power amp 
 PTT.
 
  Is there anything I'll be missing with the KAT500 vs the internal tuner 
  other than portability?
 
 QRP autotune  -- the KAT500 is optimized for high power, and doesn't 
 autotune very well below about 10W.
 
 73, Jim K9YC
 
 
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Re: [Elecraft] Tuner Loss question

2014-02-11 Thread tom armour

Why do you need to know the loss of the tuner?  Put a power meter after the 
tuner and see what your rig is putting out.  
Is this the type of chart you are looking 
for?http://www.packetradio.com/pdfzips/SWRvsPowerNwatts.pdf
It is not really the tuner that is causing the loss.  It is more the feed line. 
 
You can test this by using an external tuner and placing a watt meter both in 
front and behind the tuner and see what kind of loss you are getting.
Yes the tuner will have loss, but relatively negligible.

73 - Tom - wa4ta

 Date: Tue, 11 Feb 2014 11:47:19 -0600
 From: jvand...@gmail.com
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] Tuner Loss question
 
 I have lots of data in the loss to be expected in Coax or Open wire when
 running at higher SWR into a multiband antenna  - however, I do NOT have
 any real world data on the losses to be expected in a tuner system at
 higher SWR.
 
 So:
 
 Are there any numbers available on what additional losses my Elecraft K3
 (SN 5283) antenna tuner will experience when the SWR is high - say about
 5:1 or higher when feeding a multiband antenna with 50 Ohm coax on 20
 meters?  Should I expect another 3 dB down in signal strength during
 receive - and also Transmit?  Or are the losses higher or lower then that?
  Also, are the losses frequency dependent (like on coax) or are they the
 same across the bands.
 
 Thanks for any available data.
 
 Jobst
 AC0LP
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[Elecraft] K3 to KAT500

2014-01-24 Thread tom armour

If I buy a K3/100 without auto tuner and a KAT500 is there any additional cable 
I need (other than coax) to connect the two together? or does KAT500 come with 
all cable beeded to connect it to the K3?  I see a cable for KAT500 to KPA500 
but not to the K3.
Is there anything I'll be missing with the KAT500 vs the internal tuner other 
than portability?  I hope to be able to make an order soon.
Thanks
73 - Tom - wa4ta
  
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Re: [Elecraft] K3 to KAT500

2014-01-24 Thread tom armour

ThanksGreat input so far!It is really helping me finalize my decision. 

A few more notes/questions:I have an old tube amp (fl-2100) that does about 
600w max I intend to use until I get the money together for a KPA500.
I currently use a manual tuner that I could potentially put in line if I want 
to run QRP.I do not intend to move the K3 a lot.  I have another radio I can 
use portable.

With the old amp should I have an AUX cable?  or is the RCA cables 
Rig-KAT500-Amp enough?
73 - Tom - wa4ta
 Date: Sat, 25 Jan 2014 09:27:07 +0800
 From: vr2...@yahoo.com.hk
 To: elecraft@mailman.qth.net
 Subject: [Elecraft]  K3 to KAT500
 
 Apart from Jim's advice below, I would supplement as follows:
 
 1.  If you have no intention to take K3 as portable use or your K3 is a 
 station rig, I would go for KAT500.  This will give you the future liberty of 
 buying a KPA500 or other linear amplifier.
 2.  Once you have a linear, the internal KAT3 tuner will become redundant.  
 In fact, I sold the KAT3 to subsidize the purchase of KAT500.  I am using KX3 
 for portable use.
 
 73
 
 Johnny VR2XMC
  
 
 
  寄件人︰ Jim Brown j...@audiosystemsgroup.com
 收件人︰ elecraft@mailman.qth.net 
 傳送日期︰ 2014年01月25日 (週六) 8:04 AM
 主題︰ Re: [Elecraft] K3 to KAT500
   
 
 On 1/24/2014 3:52 PM, tom armour wrote:
  If I buy a K3/100 without auto tuner and a KAT500 is there any additional 
  cable I need (other than coax) to connect the two together?
 
 Some folks feel the need for an AUX cable to tell the KAT500 what band 
 it is on. I don't, because the KAT500 has a very fast frequency counter 
 that can figure that out with a short burst of RF.
 
  or does KAT500 come with all cable beeded to connect it to the K3?
 
 Yes.
I see a cable for KAT500 to KPA500 but not to the K3.
 
 Yes. To prevent damage to its relays, the KAT500 must be able to 
 interrupt the keying line to any power amp that is used.  It has an RCA 
 input, and an RCA output. So ONLY if you're running an amp, you need an 
 RCA-RCA between rig and KAT500, and another between KAT500 and power amp 
 PTT.
 
  Is there anything I'll be missing with the KAT500 vs the internal tuner 
  other than portability?
 
 QRP autotune  -- the KAT500 is optimized for high power, and doesn't 
 autotune very well below about 10W.
 
 73, Jim K9YC
 
 
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Re: [Elecraft] K3 Current Drain When Off

2013-10-16 Thread tom armour

Get the one from Hobbyking for $24 instead of from Power Werx.  It is the exact 
same Turnigy 130A meter without the power 
poles.http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10080You 
can buy a lot of power poles for $40.
73, Tom - wa4ta

 Date: Wed, 16 Oct 2013 17:42:34 -0700
 From: j...@audiosystemsgroup.com
 To: elecraft@mailman.qth.net
 Subject: Re: [Elecraft] K3 Current Drain When Off

 On 10/16/2013 2:46 PM, Mike Harris wrote:
  FWIW #345 draws 39mA. 

 The two radios I measured are s/n 935 and 1606. They've got a lot of 
 good miles on them. :)

 I'm measuring with a cute little inline meter that looks at volts, amps, 
 Ah, etc. Called Watts Up. Several ham vendors, including Power Werx, 
 sell it, in the range of $65, with Power Poles on both ends. Bought a 
 second one at Pacificon for $59, tax included.

 73, Jim K9YC
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This comment made me do a search on Kraus.
I found one of his books online for free in the open source archive.org site
(this is the streaming link, they also have it in
PDF):http://archive.org/stream/Antennas2ndbyjohnD.Kraus1988/Kraus-Antennas-2nd.Edition-1988#page/n0/mode/2up
I though others might like to look at it.
73 - Tom - wa4ta

Date: Wed, 2 Oct 2013 13:36:36 -0400
From: k3...@comcast.net
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Random wires

No. I expected someone who is an engineer and commands the language
better than I to explain that they are not the same and how they fit
together thereby adding a little enlightenment to this thread.

73,
Barry
K3NDM

On 10/2/2013 1:07 PM, David Gilbert wrote:

What do you expect Krause will tell you? That feedpoint impedance and
radiation resistance are the same thing?? I guarantee that it will not.

Did you not understand that feedpoint transformations transform the
combination of all impedances present at that point, and therefore
leave the relative magnitude of the various components (and therefore
the efficiency of the system) the same?? Or are you somehow of the
opinion that a folded element is not a feedpoint transformation??
I'm really having trouble understanding your logic here.

Dave AB7E

On 10/2/2013 9:26 AM, Barry LaZar wrote:
Everybody,
I see a real problem here. Please someone open up the authority,
Krause, and see what he says. His work is the basis of a whole lot of
what we have today.

73,
Barry
K3NDM

On 10/1/2013 10:55 PM, Bob Cunnings wrote:
Here's a link to the W8JI radiation resistance topic:

http://www.w8ji.com/radiation_resistance.htm

where the antenna efficiency issue is analyzed - using a 1/4 long
folded radiator as the example. In this analysis the antenna efficiency
is unchanged because total power and ground loss power terms remain
constant.

Bob NW8L

On Tue, 1 Oct 2013 14:48:55 -0700
Ron D'Eau Claire r...@cobi.biz wrote:

The important value is the resistance at the feed point of the
radiator, independent of any matching devices used.

Adding a 4:1 or other transformer is simply adjusting the impedance
the feed line sees, like any other matching network you might use. It
has no effect on the feed point resistance of the antenna.

A 1/4 wave long folded radiator has a feed point resistance of 4x the
typical 1/4 wavelength radiator, quite independent of the ground
system. Hence the efficiency is higher.

73, Ron AC7AC

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