Re: [Elecraft] KX3 Field Ant. for 80/40/30

: Wednesday, November 22, 2017 10:42 AM To: elecraft@mailman.qth.net Cc: donw...@embarqmail.com; Erik Basilier <ebasil...@cox.net> Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 Hi Eric, Don't give up on WSPRlite, with experience you'll learn that its an exceptionally powerful a

Re: [Elecraft] KX3 Field Ant. for 80/40/30

ank W3LPL - Original Message - From: "Erik Basilier" <ebasil...@cox.net> To: donw...@embarqmail.com, donov...@starpower.net, elecraft@mailman.qth.net Sent: Wednesday, November 22, 2017 8:43:57 AM Subject: RE: [Elecraft] KX3 Field Ant. for 80/40/30 Don, please see my comments b

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Don, please see my comments below: >About all you can conclude from the WSPR readings is the relative difference >between antennas. If you want to compare two horizontal antennas, place them >end to end. >The radiation at the end is at a minimum and the antenna will >not interact. Years ago

Re: [Elecraft] KX3 Field Ant. for 80/40/30

A relatively new ham asked for a copy or diagram of my portable antenna design.   Here's my response. Welcome on being a new ham.  As to the antenna design..well there is no such thing in existence. We usually camp in National parks and State parks.  There's

Re: [Elecraft] KX3 Field Ant. for 80/40/30

. 73, Erik K7TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ignacy Sent: Tuesday, November 21, 2017 5:07 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 Antenna performance does n

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Erik, About all you can conclude from the WSPR readings is the relative difference between antennas. If you want to compare two horizontal antennas, place them end to end. The radiation at the end is at a minimum and the antenna will not interact. As for comparing a vertical with a

Re: [Elecraft] KX3 Field Ant. for 80/40/30

K7TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik Basilier Sent: Sunday, November 19, 2017 11:13 PM To: donov...@starpower.net; elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 Hi Frank

Re: [Elecraft] KX3 Field Ant. for 80/40/30

: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ignacy Sent: Tuesday, November 21, 2017 5:07 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 Antenna performance does not depend on how it is fed (if feeder losses are low

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Antenna performance does not depend on how it is fed (if feeder losses are low) but on height and ground type. For KX3 with AT, any special length makes little sense, especially in portable conditions. KX3 matches most random wires, and KX3 with 4:1 balun matches any wires. Lack of balance is not

Re: [Elecraft] KX3 Field Ant. for 80/40/30

For that very reason, in our camper operation, I use a end fed antenna.  The matching network is a tapped coil and variable C forming an L network.  The circuit is in a small plastic box with a SO-239 on each end, thus it is reversible.   This allows a wide range of impedance selections, plus

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Hi Frank, Thanks for your very useful comments. Below my answers: >Radiation results from RF current flowing in an antenna. An RF >ammeter is a useful instrument for measuring the relative efficiency >different types of matching networks feeding similar antennas. Granted. I might want

Re: [Elecraft] KX3 Field Ant. for 80/40/30

For several years I've been using a 33 ft wire and a pair of small tapped loading coils to get  an EFHW vertical resonant on 20m. 30m and 40m.  It's fed with a link coupled tuned tank circuit consisting of a coil on a 1 inch powdered iron toroid and an air variable capacitor.  The link

Re: [Elecraft] KX3 Field Ant. for 80/40/30

On 11/19/2017 02:22, Erik Basilier wrote: The second approach, used by MyAntennas and others seems to use a transformer with much higher impedance ratio. One way to construct such a transformer would be to cascade two 9:1 units for an effective ratio of 81:1. While I haven't tried it, it would

Re: [Elecraft] KX3 Field Ant. for 80/40/30

: "Erik Basilier" <ebasil...@cox.net> To: donov...@starpower.net, elecraft@mailman.qth.net Sent: Monday, November 20, 2017 1:51:47 AM Subject: RE: [Elecraft] KX3 Field Ant. for 80/40/30 I am well aware of that, Frank, and in fact I have multiple cores sitti

Re: [Elecraft] KX3 Field Ant. for 80/40/30

best for me in field use. 73, Erik K7TV From: donov...@starpower.net [mailto:donov...@starpower.net] Sent: Sunday, November 19, 2017 3:33 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 Its easy to measure transformer loss by measuring the loss through

Re: [Elecraft] KX3 Field Ant. for 80/40/30

ilier" <ebasil...@cox.net> To: "Bill Frantz" <fra...@pwpconsult.com> Cc: elecraft@mailman.qth.net Sent: Sunday, November 19, 2017 10:14:41 PM Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 Bill, I am aware of Jim's innovative way of achieving center feed while

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Erik K7TV -Original Message- From: Bill Frantz [mailto:fra...@pwpconsult.com] Sent: Sunday, November 19, 2017 1:03 PM To: Erik Basilier <ebasil...@cox.net> Cc: 'JT Croteau' <jt.to...@gmail.com>; elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 A u

Re: [Elecraft] KX3 Field Ant. for 80/40/30

3...@rogers.com> Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 there is an End Fed Half Wave Antenna group on Facebook started up by N4LQ. it certainly promotes the EFHW fed with a 49:1 transformer. Steve loves the EFHW, but really does not have much love for 9:1 unun antenna. still, it is an

Re: [Elecraft] KX3 Field Ant. for 80/40/30

A useful post Erik. Also useful is the "pseudo end-fed" design that K9YC shows on starting at page 70. This design is really a center fed dipole using the outside of the feed line coax as one half of the dipole and an extension of the center conductor as

Re: [Elecraft] KX3 Field Ant. for 80/40/30

-- From: "Erik Basilier" <ebasil...@cox.net> Sent: Sunday, November 19, 2017 3:22 AM To: "'JT Croteau'" <jt.to...@gmail.com>; <elecraft@mailman.qth.net> Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 End-fed antennas have gotten po

Re: [Elecraft] KX3 Field Ant. for 80/40/30

If the wire is near an even multiple of 1/4 wave (1/2 wave, one full wave, 1 1/2 wave, etc.) then the impedance at the end of the wire is going to be very high. If the wire is near an odd multiple of 1/4 wave (1/4 wave, 3/4 wave, 1 1/4 wave) then the impedance will be low. If you're

Re: [Elecraft] KX3 Field Ant. for 80/40/30

ound >> the rig, I would consider a small counterpoise wire to the high impedance >> side of the transformer, or experimenting with the length of the feedline, >> as the length of it matters when "counterpoise current" flows on the >> outside >> of it. I would not count on the

[Elecraft] KX3 Field Ant. for 80/40/30 Alternative to wire

onto where the buckle rivets on G7LTQ - John N From: Don Wilhelm <donw...@embarqmail.com> Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30 Date: 18 November 2017 at 22:05:22 GMT To: JT Croteau <jt.to...@gmail.com>, elecraft@mailman.qth.net Reply-To: donw...@embarqmail.com The

Re: [Elecraft] KX3 Field Ant. for 80/40/30

fective common mode choke. 73, Erik K7TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of JT Croteau Sent: Saturday, November 18, 2017 2:34 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KX3 Field Ant. for 80/40/30 Friends

Re: [Elecraft] KX3 Field Ant. for 80/40/30

ilman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of JT Croteau Sent: Saturday, November 18, 2017 2:34 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KX3 Field Ant. for 80/40/30 Friends, what would be a good end fed wire setup that will match well with the internal KX3 AT

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Check out the expedition that W6GJB, W6JTI, and I did for 7QP last year (2016) to seven NV counties, including Nye and Lander.   k9yc.com/7QP.pdf 73, Jim K9YC On 11/18/2017 4:52 PM, Fred Jensen wrote: Nearest "town" for me in Nye County is Gabbs, population 269, about 2.5 hrs from home.  I'm

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Nearest "town" for me in Nye County is Gabbs, population 269, about 2.5 hrs from home.  I'm way too old and way too physically diminished to do this without reasonable accommodations.  Google Nye County NV and pick Wikipedia for a photo of "downtown" Gabbs.  Between home and Gabbs is a whole

[Elecraft] KX3 Field Ant. for 80/40/30

Why not do Nye county as well. That might only take one QSO.  hi-hi Terry, KQ5U On 11/18/2017 4:29 PM, Fred Jensen wrote: My HOA-Stealth antenna is the "80-10 EF" from myantennas.com  It is strung on electric fence insulators along the top of the wooden fence, about 1.8 meters high.  It has

Re: [Elecraft] KX3 Field Ant. for 80/40/30

My HOA-Stealth antenna is the "80-10 EF" from myantennas.com  It is strung on electric fence insulators along the top of the wooden fence, about 1.8 meters high.  It has a 90 deg bend in it about 1/3 of the way down from the transformer.  It actually works 160-10 with my K3/100 + KAT3.  It

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Yes, this is also a great technique. One suggestion though -- there's RF current in the counterpoise, and having it too close to the ground will burn (waste) some TX power. Better to run it in the range of 6-8 ft. Remember - an SWR indication at the rig is NOT an indicator of antenna

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Hi. Feet is not my everyday system for length measure, but i think it transelate to very close to an full wave length on 40m and close to an half wave on 80. That is an tough match for any tuner. Even so, with the transformer and the coax I think it should have given better results than 6.4:1 on

Re: [Elecraft] KX3 Field Ant. for 80/40/30

Thanks Don, I will try this next. On Sat, Nov 18, 2017 at 5:05 PM, Don Wilhelm wrote: > The easiest end fed antenna for portable use with those bands on the KX2/KX3 > comes from some experiments and experience of one of the KX2 field testers > (and an active SOTA ham). >

Re: [Elecraft] KX3 Field Ant. for 80/40/30

On 11/18/2017 1:34 PM, JT Croteau wrote: Friends, what would be a good end fed wire setup that will match well with the internal KX3 ATU and cover, hopefully, 80, 40, and 30 meters? I went out to my winter camp site, with two really tall pine trees, and tried to experiment with a 9:1 UNUN, 135'

Re: [Elecraft] KX3 Field Ant. for 80/40/30

The easiest end fed antenna for portable use with those bands on the KX2/KX3 comes from some experiments and experience of one of the KX2 field testers (and an active SOTA ham). Use a BNC to dual binding post (Pomona) adapter on the KX2/3. Connect a 58 foot piece of wire to the red (center

[Elecraft] KX3 Field Ant. for 80/40/30

Friends, what would be a good end fed wire setup that will match well with the internal KX3 ATU and cover, hopefully, 80, 40, and 30 meters? I went out to my winter camp site, with two really tall pine trees, and tried to experiment with a 9:1 UNUN, 135' radiator, and 35' of RG8X. It was a total