Date   

Re: K3 and end fed wire

Michael Kopec
 

I know I will probably get a lot of what the heck feedback on this set-up, but it works for me using both my kX3 and K2 with internal tuners, I use a bnc test connector with two test poles connected directly to the radio. I directly connect a 27ft wire, usually strung at a 30 to 45 degree upward angle, to the red pole and a 27ft counterpoise/radial to the other black pole, usually laid on the ground. The xcvr tunes fine on 10 thru 40m with the internal tuner. When I am done operating, I just roll up the #20 stranded wire on a old fishing line spool. It is easy and works for me.

On Tuesday, May 18, 2021, 04:42:51 PM EDT, K9MA <k9ma@...> wrote:


I know they're not popular, but I recommend an external tuner located at the end of the wire. The only exception might be if the coax is short and the wire is NOT a multiple of a half wave. In either case, the counterpoise connects near the end of the antenna.  If you can, the simplest arrangement is to bring the end of the wire right to the tuner near the radio. 

That said, the half wave multiple wire can work very well, if you can match it with an external tuner. (Some use a 9:1 transformer, but I don't.) The big advantage is that only a minimal counterpoise is required, because the antenna impedance is very high. Also, the part of the wire near the feedpoint doesn't radiate much, so bringing the wire right to the radio doesn't hurt performance much.  I have long been using an end fed 40 meter half wave for portable operation on 40, 20, and 15 meters. For 80 meters, I add two 20 meter long radials, bypass the external tuner, and use the internal ATU. On 80, an isolation choke cuts down on RF in the shack, though I don't use it for QRP operation.

73,
Scott K9MA

On 5/18/2021 11:11 AM, JOHN MCBRIDE wrote:
I am considering using my K3 on Field Day with an end fed wire. I have studied the information from Wayne N6KR as well as looked at other information on this topic on line. I am wondering about a transmission line from the ATU (RG8 or other) on the K3 to connect to the end fed wire several feet away. But the recommendation is for the counterpoise to be connected to the ground on the K3. Do I need to run a separate counterpoise wire from the K3 or can the counterpoise be connected to the braid/shield of the transmission line? Any and all responses will be helpful. Thanks!
--
John N0UQC


-- Scott  K9MAk9ma@...


Re: K3 and end fed wire

K9MA
 

I know they're not popular, but I recommend an external tuner located at the end of the wire. The only exception might be if the coax is short and the wire is NOT a multiple of a half wave. In either case, the counterpoise connects near the end of the antenna.  If you can, the simplest arrangement is to bring the end of the wire right to the tuner near the radio. 

That said, the half wave multiple wire can work very well, if you can match it with an external tuner. (Some use a 9:1 transformer, but I don't.) The big advantage is that only a minimal counterpoise is required, because the antenna impedance is very high. Also, the part of the wire near the feedpoint doesn't radiate much, so bringing the wire right to the radio doesn't hurt performance much.  I have long been using an end fed 40 meter half wave for portable operation on 40, 20, and 15 meters. For 80 meters, I add two 20 meter long radials, bypass the external tuner, and use the internal ATU. On 80, an isolation choke cuts down on RF in the shack, though I don't use it for QRP operation.

73,
Scott K9MA

On 5/18/2021 11:11 AM, JOHN MCBRIDE wrote:
I am considering using my K3 on Field Day with an end fed wire. I have studied the information from Wayne N6KR as well as looked at other information on this topic on line. I am wondering about a transmission line from the ATU (RG8 or other) on the K3 to connect to the end fed wire several feet away. But the recommendation is for the counterpoise to be connected to the ground on the K3. Do I need to run a separate counterpoise wire from the K3 or can the counterpoise be connected to the braid/shield of the transmission line? Any and all responses will be helpful. Thanks!
--
John N0UQC


-- 
Scott  K9MA

k9ma@...


Re: K3 and end fed wire

Mel Farrer, K6KBE <farrermesa@...>
 

EVER Heard of the ECOCFD?  
Not my design, but it WORKS.

Mel, K6KBE

On Tue, May 18, 2021 at 11:09 AM Dennis Moore <dennis@...> wrote:
How are you transitioning from the coax to the end fed?

If the antenna is connected directly to the jack on the K3 then the
counterpoise would be necessity be connected to the chassis at some
point. But if you're running a length of coax out to the antenna and
using some sort of unun, connect the counterpoise at that unun and use
some type of choke on the coax to keep RF off the shield.

When I'm using an end-fed antenna placed away from the rig, I use the HF
matchbox found here: http://www.earchi.org/proj_homebrew.html connected
directly to an ugly balun. With this setup I've worked as far as
Thailand, Spain, Fiji, New Zealand from California. Easily handles 100
watts.

73, Dennis NJ6G

On 5/18/2021 09:11, JOHN MCBRIDE wrote:
> I am considering using my K3 on Field Day with an end fed wire. I have
> studied the information from Wayne N6KR as well as looked at other
> information on this topic on line. I am wondering about a transmission
> line from the ATU (RG8 or other) on the K3 to connect to the end fed
> wire several feet away. But the recommendation is for the counterpoise
> to be connected to the ground on the K3. Do I need to run a separate
> counterpoise wire from the K3 or can the counterpoise be connected to
> the braid/shield of the transmission line? Any and all responses will
> be helpful. Thanks!
> --
> John N0UQC






Re: K3 and end fed wire

Dennis Moore
 

How are you transitioning from the coax to the end fed?

If the antenna is connected directly to the jack on the K3 then the counterpoise would be necessity be connected to the chassis at some point. But if you're running a length of coax out to the antenna and using some sort of unun, connect the counterpoise at that unun and use some type of choke on the coax to keep RF off the shield.

When I'm using an end-fed antenna placed away from the rig, I use the HF matchbox found here: http://www.earchi.org/proj_homebrew.html connected directly to an ugly balun. With this setup I've worked as far as Thailand, Spain, Fiji, New Zealand from California. Easily handles 100 watts.

73, Dennis NJ6G

On 5/18/2021 09:11, JOHN MCBRIDE wrote:
I am considering using my K3 on Field Day with an end fed wire. I have studied the information from Wayne N6KR as well as looked at other information on this topic on line. I am wondering about a transmission line from the ATU (RG8 or other) on the K3 to connect to the end fed wire several feet away. But the recommendation is for the counterpoise to be connected to the ground on the K3. Do I need to run a separate counterpoise wire from the K3 or can the counterpoise be connected to the braid/shield of the transmission line? Any and all responses will be helpful. Thanks!
--
John N0UQC


Re: K3 and end fed wire

Mel Farrer, K6KBE <farrermesa@...>
 

John what bands are you wanting to operate?

My favorite end fed wire is the ECOCFD  End connected Off center fed dipole.  I have the construction article if you are interested.  Cheers,

Mel, K6KBE

On Tue, May 18, 2021 at 10:46 AM JOHN MCBRIDE <jlm124@...> wrote:
I am considering using my K3 on Field Day with an end fed wire. I have studied the information from Wayne N6KR as well as looked at other information on this topic on line. I am wondering about a transmission line from the ATU (RG8 or other) on the K3 to connect to the end fed wire several feet away. But the recommendation is for the counterpoise to be connected to the ground on the K3. Do I need to run a separate counterpoise wire from the K3 or can the counterpoise be connected to the braid/shield of the transmission line? Any and all responses will be helpful. Thanks!
--
John N0UQC


Re: K3 and end fed wire

Mike Flowers
 

This article describes an antenna for use with the KX2/KX3, but of course would work with a K3:

 

https://reflector.sota.org.uk/t/simple-resonant-multiband-antenna-for-use-with-kx3-2-and-internal-atu/16978

 

- 73 and good DX de Mike, K6MKF, NCDXC Secretary

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of JOHN MCBRIDE
Sent: Tuesday, May 18, 2021 09:11
To: Elecraft-K3@groups.io
Subject: [Elecraft-K3] K3 and end fed wire

 

I am considering using my K3 on Field Day with an end fed wire. I have studied the information from Wayne N6KR as well as looked at other information on this topic on line. I am wondering about a transmission line from the ATU (RG8 or other) on the K3 to connect to the end fed wire several feet away. But the recommendation is for the counterpoise to be connected to the ground on the K3. Do I need to run a separate counterpoise wire from the K3 or can the counterpoise be connected to the braid/shield of the transmission line? Any and all responses will be helpful. Thanks!
--
John N0UQC


K3 and end fed wire

JOHN MCBRIDE
 

I am considering using my K3 on Field Day with an end fed wire. I have studied the information from Wayne N6KR as well as looked at other information on this topic on line. I am wondering about a transmission line from the ATU (RG8 or other) on the K3 to connect to the end fed wire several feet away. But the recommendation is for the counterpoise to be connected to the ground on the K3. Do I need to run a separate counterpoise wire from the K3 or can the counterpoise be connected to the braid/shield of the transmission line? Any and all responses will be helpful. Thanks!
--
John N0UQC


Re: Trade: KX1, with extras, for W2 Wattmeter with extras

Dave (NK7Z)
 

The KX1 is no longer available, a person has exactly what I was looking for, and we are in the process of performing the trade.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 5/16/21 12:52 PM, Dave (NK7Z) wrote:
Hi,
I have an almost mint KX1, (recently back from service and checkup, with paperwork indicating all is well with the unit, and it meeting specs), which I am looking to trade for a almost mint condition W2 Wattmeter, with one HF 2K coupler, (DCHF-2000), and one VHF 200 W coupler, (DCV/U-200).
I will pay insured express postage to you, and you pay insured express postage to me.
Rather than attach a set of photos to the list, if you are interested, see:
https://wp.me/P285zq-2id
For photos and more detailed description.


KIO3B and KXV3B Needed

Bruce N9BX <n9bx73@...>
 

Hello group.  If anyone has one or both of these for sale, please let me know.  Just upgrading my basic K3
Bruce N9BX 73  You can Email me direct.  Thanks.


Re: Lets see if we can meet on 3.775 75/80 Elecraft Net

Paul Van Dyke
 

Lets see who can brave the mess on the bands tonight
It has been a mess all day ... I know there were ops on 40, bur never heard them

Since Mother Nature messed with me last week and I could only pull one of all the crashes. Let's try again 
Time Tonight at 01:00 UTC (or Monday morning)
3.775 73

Paul Van Dyke - KB9AVO
K4 #76


On Sun, May 9, 2021 at 4:02 AM Paul Van Dyke <pvandyke1953@...> wrote:
Since Mother Nature messed with me last week and I could only pull one of all the crashes. Let's try again 

Time Tonight at 01:00 UTC (or Monday morning)
73

Paul Van Dyke - KB9AVO
K4 #76


Trade: KX1, with extras, for W2 Wattmeter with extras

Dave (NK7Z)
 

Hi,

I have an almost mint KX1, (recently back from service and checkup, with paperwork indicating all is well with the unit, and it meeting specs), which I am looking to trade for a almost mint condition W2 Wattmeter, with one HF 2K coupler, (DCHF-2000), and one VHF 200 W coupler, (DCV/U-200).

I will pay insured express postage to you, and you pay insured express postage to me.

Rather than attach a set of photos to the list, if you are interested, see:

https://wp.me/P285zq-2id

For photos and more detailed description.

--
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources


Re: K3 to K3S Upgrade Parts Question

Bob Hammond G4DBW
 

I assumed June 2022........

Bob G4DBW


Re: K3 to K3S Upgrade Parts Question

Ian Kahn
 

All,

Two comments to this:

  1. To Jim, K9YC - Please accept my apologies for what, in hindsight, was an inappropriate response to your reply to my original post. I saw your reply late in the evening, after a rough day at work. Perhaps I was bit more prickly than I needed to be, and I took your reply to be more than it really was. This, of course, is no excuse for behaving poorly. For that, I apologize, both to you personally, and to the entire community.
  2. To the others who replied - thank you for the answer. I couldn't find the original email from Elecraft, and I obviously mis-remembered what it said about anticipated delivery dates.
I will now go crawl back in my hole and patiently await my components sometime in/after July of this year.

73 de,

Ian, NV4C


Re: K3 to K3S Upgrade Parts Question

David M
 

You probably shouldn't expect your order to be delivered by Field Day...

From Elecraft's web site:

https://elecraft.com/pages/k3-k3s-options

"We hope to start shipping end of July at the earliest."

Good luck,   de AJ4TF


Re: K3 to K3S Upgrade Parts Question

 
Edited

Ian,

You must have received a different letter from Elecraft than I did. I received mine on 04/19/2021 and it didn't say anything about a "June" shipment date.

Below is a cut/paste of the graf that discusses "possible" shipment time.  This is from the e-mail I got from Elecraft.

That same letter is at the Elecraft website and I've added a link to the message here:  https://elecraft.com/pages/k3-k3s-options  

A quick glance at the 3rd graf indicates July.  So not sure where you saw June.

====================
You may be aware of the challenges that many manufacturers are having when it comes to acquiring materials in a timely manner - this is the case for Elecraft and our suppliers.  We expect to order materials by the end of April.  We are guesstimating that it will take ten weeks to receive the materials based on the timelines our suppliers have provided us, and another two to three weeks to assemble.  We hope to start shipping end of July at the earliest.
====================
--

73 - Nolan K.
KI5IO


Re: K3 to K3S Upgrade Parts Question

Keith KV5J
 

Ian,

No.

Keith


Re: K3 to K3S Upgrade Parts Question

Jim Brown
 

On 5/14/2021 8:29 PM, Ian Kahn wrote:
nstead of a snide, backbiting, sarcasm-laced remark.
You have a vivid imagination. That may be what you thought, but it's not what I wrote. Indeed, I suggested that you ask on the Elecraft reflector, with the principals both hang out.

73, Jim K9YC


Re: K3 to K3S Upgrade Parts Question

Ian Kahn
 

Jim,

1. I work for a hospital.
2. I read this group multiple times a day.

So, yes, I am very aware of what's going on with supply chain, COVID, wildfires, etc.

The email I got when ordering availability was announced said to expect shipment sometime in June. While I certainly don't expect delivery the first week in June, Field Day isn't until the LAST week of the month this year. So, my question seems perfectly reasonable. If the answer is, "No", then so be it. That's fine, and I'm patient.

However, my club often uses my K3 as one of its Field Day stations. So, I would like to be able to tell everyone, with some degree of confidence, what its capabilities will, or won't be.

That said, I would greatly appreciate a reasonable, appropriate answer from someone who might know, instead of a snide, backbiting, sarcasm-laced remark. Elecraft sales is busy enough without having to answer my piddling question, and I know many of Elecraft's staff follow this group. If I could get a simple answer from someone in the know, that's all I ask.

73 de,

Ian, NV4C


KAT500 single band fault

David Aslin
 

Consulting the hive mind:

I have for many years used the K3/KPA500/KAT500 combination at home and on 6Gs DXpeditions.  It has been faultless until this week.

Setup: On all bands 20-6m I use an Ultrabeam antenna (same principle as Steppir) so the KAT500 is set to Bypass.  SWR ranges up to 1.2:1 depending on frequency and band

Symptom: the KAT500 and KPA500 fault with High SWR.  The LEDs show 3:1.  This only happens on 12m; other bands work as expected

Fault finding so far: antenna analyser on the Ultrabeam on 12m shows SWR of 1.2:1. 

Suggests antenna OK, so replaced antenna with dummy load: KAT500/KPA500 fault as before on 12m only.

Antenna had been connected to Port 2 of the KAT500; dummy load also connected to Port 2.

Moved dummy load to Port 3.  Setup runs as normal. Moved antenna to Port 3. Setup runs as normal across all bands 20m-6m.

 

Conclusion: there is a problem with Port 2 of the KAT500, but only on 12m.

Suggestions of how to troubleshoot this Port 2 issue with KAT500 gratefully received!

 

BTW, I built all my Elecraft products from kits, so happy to open up the box and do board or component level troubleshooting/replacement; I just need guidance on how to nail down the problem.

73, David G3WGN  M6O


Re: K3 to K3S Upgrade Parts Question

Jim Brown
 

On 5/14/2021 12:22 PM, Ian Kahn wrote:
whether or not parts receipt well before Field Day is a reasonable expectation?
If you've been paying attention here, on Elecraft's own reflector, or even newspapers, you'll take the pessimistic view. Virtually ALL manufacturing has supply chain problems -- everything from construction to vehicles. We're all swimming around in the same soup.

73, Jim K9YC

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