Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread Tom Watson via BVARC
What would happen if you made the legs of the dipole out of computer ribbon cable tied together at the feed end and open at the other? Would that be similar to what you are talking about? From: BVARC [mailto:bvarc-boun...@bvarc.org] On Behalf Of Martin Blaise via BVARC Sent: Thursday,

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread Travis Burgess via BVARC
Sorry, that should have been addressed to Kirk! Not Rick. See, my brain is AWOL! No trees were harmed in the production of this message, however, a great many electrons were terribly inconvenienced. From: BVARC on behalf of Martin Blaise via BVARC Sent:

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread Travis Burgess via BVARC
Rick, while your brain is out wandering about, please have it tell mine to come home!!! Travis No trees were harmed in the production of this message, however, a great many electrons were terribly inconvenienced. From: BVARC on behalf of Martin Blaise via

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread Kirk Kendrick via BVARC
Rick, Fan dipole with all the wires the same lengthand closely spaced. Resistance should be 2) unchanged as others pointed out. Coupling will cause broader BW like a cage dipole. Unless your antenna conductors are manufactured to limit variance Impedence in real world will be hard to

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread MIKE BRANNAN via BVARC
Sent from my iPhone > On Jan 16, 2020, at 9:38 AM, Gus Bernard via BVARC wrote: > >  > I'm no engineer, but my guess is the individual DC resistance of each wire > will not change one iota; therefore, the total DC resistance will not change, > either. Then, continuing my guess and

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread NIzar Mullani via BVARC
Look up CAGE antenna. It is an old design that reduces the Q of the antenna and therefore makes the antenna work over a larger frequency range. From: BVARC [mailto:bvarc-boun...@bvarc.org] On Behalf Of Rick Hiller via BVARC Sent: Thursday, January 16, 2020 8:57 AM To: BRAZOS VALLEY AMATEUR

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread PAUL JOKI via BVARC
Sounds like A horsefence antenna.Sent from Xfinity Connect Application-Original Message-From: bvarc@bvarc.orgTo: bvarc@bvarc.orgCc: rickhille...@gmail.comSent: 2020-01-16 8:57:15 AM Subject: [BVARC] Antenna Theory Technical Question I am in the midst of analyzing a Ham market HF antenna. 

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread Gus Bernard via BVARC
I'm no engineer, but my guess is the individual DC resistance of each wire will not change one iota; therefore, the total DC resistance will not change, either. Then, continuing my guess and ignoring non-resistive impedance, any RF energy introduced at the feed point will be dissipated equally

Re: [BVARC] Antenna Theory Technical Question

2020-01-16 Thread Ravi Patrick Ratnala via BVARC
Interesting antenna. Off the top of my head, at RF, I’d say there’s no difference in the resistive component of impedance; you’re still talking about a 5-ohm material. The reactive component probably does have to be modeled. The big issue I see is that, unless all the component wires are

[BVARC] Antenna Theory Technical Question

2020-01-16 Thread Rick Hiller via BVARC
I am in the midst of analyzing a Ham market HF antenna. Still building the EZNEC model, but working it thru the gray matter. Case: Take a 1/2 wl dipole antenna -- center fed. Each side is made up of multiple, equal length wires that are each insulated, parallel, and closely spaced. The wires