K3 & FD multi band antenna
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I have the internal tuner in my K3 and want to be able to put up a
wire antenna that can be assembled in minutes for both FD and public event locations. I used to have a Mor-Gain antenna & while it wasn't a great performer, it would have been fine for this use. Danged if I can find it though, I must have lent it out & never got it back. I've thought to use my spud gun to send a random wire over a tree top & have a counterpoise wire on the ground, using the K3's ATU to match the wire to the band. The goal would be to cover 80-20 meters. Above 20 would be nice but there's not much activity there and I'd like to be able to demonstrate Ham Radio. Any suggestions on something else that is convenient and works well would be appreciated. Thanks Gary KA1J ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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On Thu, 10 Jun 2010 23:20:56 -0400, "Gary Smith" <[hidden email]>
wrote: Gary, I would suggest using three inverted vee's all fed from the same coax. By feeding them with the same coax only the antenna that is resonant on the transmit frequency will radiate and the K3 internal tuner can handle the tuning of them so you can work each band on CW and SSB. You could use your spud gun to launch the suspension cord (3/16 nylon works really good and will support all 3 inverted vee's. I used this arrangement for several years after I was first licensed in 1976. and lived on a city lot. Try it you'll like it! Tom, N5GE K3 #806 with SUB RX, PR6, KRC2 and K144XV K3 #1055 with PR6 and XV432 W1, 2 W2's and other small kits QCWA Life Member 35102 [hidden email] http://www.n5ge.com http://www.swotrc.net >I have the internal tuner in my K3 and want to be able to put up a >wire antenna that can be assembled in minutes for both FD and public >event locations. I used to have a Mor-Gain antenna & while it wasn't >a great performer, it would have been fine for this use. Danged if I >can find it though, I must have lent it out & never got it back. > >I've thought to use my spud gun to send a random wire over a tree top >& have a counterpoise wire on the ground, using the K3's ATU to match >the wire to the band. The goal would be to cover 80-20 meters. Above >20 would be nice but there's not much activity there and I'd like to >be able to demonstrate Ham Radio. > >Any suggestions on something else that is convenient and works well >would be appreciated. > >Thanks > >Gary >KA1J >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Amateur Radio Operator N5GE
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In reply to this post by Gary Smith-2
Gary,
For 80 thru 20 meter operation, I would advocate an 88 foot dipole. 44 feet on each side and fed with either 300 or 450 ohm ladder line (use 300 ohm for portable because it is lighter). A push-up pole will allow that antenna to be erected in minutes - The feedline and center of the dipole are at the tip of the pole and the ends are spread out in inverted Vee fashoin to whatever bushes, shrube, or trees are available. A 44 foot dipole will work fine for 40 thru 10 meters. See the L B Cebik archives - My Favorite 5 Backyard Antennas for more details. 73, Don W3FPR Gary Smith wrote: > I have the internal tuner in my K3 and want to be able to put up a > wire antenna that can be assembled in minutes for both FD and public > event locations. I used to have a Mor-Gain antenna & while it wasn't > a great performer, it would have been fine for this use. Danged if I > can find it though, I must have lent it out & never got it back. > > I've thought to use my spud gun to send a random wire over a tree top > & have a counterpoise wire on the ground, using the K3's ATU to match > the wire to the band. The goal would be to cover 80-20 meters. Above > 20 would be nice but there's not much activity there and I'd like to > be able to demonstrate Ham Radio. > > Any suggestions on something else that is convenient and works well > would be appreciated. > > Thanks > > Gary > KA1J > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Gary
I am always portable and for a quick antenna when portable, if you have a vehicle mounted antenna with RG8/59 connected to it, just remove the antenna and attach a long wire and throw that up into the trees...the K3 ATU handles mine just fine..80-10M. My 2 cents worth, keep the change mate! Gary - VK4FD On Fri, Jun 11, 2010 at 2:29 PM, Don Wilhelm <[hidden email]> wrote: > Gary, > > For 80 thru 20 meter operation, I would advocate an 88 foot dipole. 44 > feet on each side and fed with either 300 or 450 ohm ladder line (use > 300 ohm for portable because it is lighter). > > A push-up pole will allow that antenna to be erected in minutes - The > feedline and center of the dipole are at the tip of the pole and the > ends are spread out in inverted Vee fashoin to whatever bushes, shrube, > or trees are available. > > A 44 foot dipole will work fine for 40 thru 10 meters. > > See the L B Cebik archives - My Favorite 5 Backyard Antennas for more > details. > > 73, > Don W3FPR > > Gary Smith wrote: >> I have the internal tuner in my K3 and want to be able to put up a >> wire antenna that can be assembled in minutes for both FD and public >> event locations. I used to have a Mor-Gain antenna & while it wasn't >> a great performer, it would have been fine for this use. Danged if I >> can find it though, I must have lent it out & never got it back. >> >> I've thought to use my spud gun to send a random wire over a tree top >> & have a counterpoise wire on the ground, using the K3's ATU to match >> the wire to the band. The goal would be to cover 80-20 meters. Above >> 20 would be nice but there's not much activity there and I'd like to >> be able to demonstrate Ham Radio. >> >> Any suggestions on something else that is convenient and works well >> would be appreciated. >> >> Thanks >> >> Gary >> KA1J >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> 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:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Don Wilhelm-4
Don and all,
The 88 foot dipole, and the 44 foot dipole, are examples of an antenna designed for pattern alone with no consideration of feedline losses or matching systems. http://www.w8ji.com/short_dipoles_and_problems.htm With an 88 foot antenna the 80 meter SWR on a 400 ohm line (most ladder line is 400 ohms, not 450) is over 100:1. That does not make for an efficient system, and it can be hell on antenna tuners and baluns. While any mismatched dipole would require consideration of feedline length and antenna length, the minimum sensible length of a dipole is about 80% of full size. Below that things get very rough for tuners and feedlines. 73 Tom ----- Original Message ----- From: "Don Wilhelm" <[hidden email]> To: <[hidden email]> Cc: <[hidden email]> Sent: Friday, June 11, 2010 12:29 AM Subject: Re: [Elecraft] K3 & FD multi band antenna > Gary, > > For 80 thru 20 meter operation, I would advocate an 88 foot dipole. 44 > feet on each side and fed with either 300 or 450 ohm ladder line (use > 300 ohm for portable because it is lighter). > > A push-up pole will allow that antenna to be erected in minutes - The > feedline and center of the dipole are at the tip of the pole and the > ends are spread out in inverted Vee fashoin to whatever bushes, shrube, > or trees are available. > > A 44 foot dipole will work fine for 40 thru 10 meters. > > See the L B Cebik archives - My Favorite 5 Backyard Antennas for more > details. > > 73, > Don W3FPR > > Gary Smith wrote: >> I have the internal tuner in my K3 and want to be able to put up a >> wire antenna that can be assembled in minutes for both FD and public >> event locations. I used to have a Mor-Gain antenna & while it wasn't >> a great performer, it would have been fine for this use. Danged if I >> can find it though, I must have lent it out & never got it back. >> >> I've thought to use my spud gun to send a random wire over a tree top >> & have a counterpoise wire on the ground, using the K3's ATU to match >> the wire to the band. The goal would be to cover 80-20 meters. Above >> 20 would be nice but there's not much activity there and I'd like to >> be able to demonstrate Ham Radio. >> >> Any suggestions on something else that is convenient and works well >> would be appreciated. >> >> Thanks >> >> Gary >> KA1J >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> 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:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Gary Smith-2
Hi Gary,
I use a very simple inverted vee 41' total length which is not resonant on any band, I have constructed it out of Coated-Flex-150 from qsradio.com which is very flexible and tangle resistant and works well in trees, fed with coax and very easy to get in the air and tunes 10 - 80 with the K3's ATU. 73 George...WA1NTA -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Gary Smith Sent: Thursday, June 10, 2010 11:21 PM To: [hidden email] Subject: [Elecraft] K3 & FD multi band antenna I have the internal tuner in my K3 and want to be able to put up a wire antenna that can be assembled in minutes for both FD and public event locations. I used to have a Mor-Gain antenna & while it wasn't a great performer, it would have been fine for this use. Danged if I can find it though, I must have lent it out & never got it back. I've thought to use my spud gun to send a random wire over a tree top & have a counterpoise wire on the ground, using the K3's ATU to match the wire to the band. The goal would be to cover 80-20 meters. Above 20 would be nice but there's not much activity there and I'd like to be able to demonstrate Ham Radio. Any suggestions on something else that is convenient and works well would be appreciated. Thanks Gary KA1J ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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