Re: [Elecraft] Magnetic Loop question

2016-10-21 Thread Bill Leonard N0CU
"The polarization does not matter to radiation pattern. " This isn't the case for most antennas we use which launch an electromagnetic wave by generating an electric field. Ground characteristics affect the pattern of a vertically polarized wave much more than they affect a horizontally polarized

Re: [Elecraft] Magnetic Loop question

2016-10-20 Thread Fred Jensen
Ummm ... there may be a confusion with loops that are electrically large ... like a circumference of 360 deg. They are E-field antennas [just like a half-wave dipole or 1/4 wave vertical] and the feed point determines the polarization. Polarization matters at VHF and above, but at HF, the rec

Re: [Elecraft] Magnetic Loop question

2016-10-20 Thread John Magliacane via Elecraft
On Thu, 10/20/16, Steven Dick wrote: > The vertical loop can be horizontally polarized by feeding it in the middle > of the top or bottom edges. It can be vertically polarized by feeding it in > the middle of the vertical edges. That's true for a loop having a full-wave circumference, but "Ma

Re: [Elecraft] Magnetic Loop question

2016-10-20 Thread Steven Dick
On Thu, Oct 20, 2016 at 5:04 AM, Vic Rosenthal wrote: > If it is vertically polarized it has a dipole-like pattern, with sharp nulls. > If horizontal, it is more or less omnidirectional. > This is sort of incorrect. The polarization does not matter to radiation pattern. The physical orientatio

Re: [Elecraft] Magnetic Loop question

2016-10-20 Thread Dave Cole
On Thu, 2016-10-20 at 12:04 +0300, Vic Rosenthal wrote: > If it is vertically polarized it has a dipole-like pattern, with sharp > nulls. If horizontal, it is more or less omnidirectional. > > Vic 4X6GP Add enough ferrite material to do some decent choking on the feedline, and the nulls get deepe

Re: [Elecraft] Magnetic Loop question

2016-10-20 Thread Vic Rosenthal
If it is vertically polarized it has a dipole-like pattern, with sharp nulls. If horizontal, it is more or less omnidirectional. Vic 4X6GP > On 20 Oct 2016, at 04:42, Phillip Lontz wrote: > > Are mag loop antennas very directional? > Are mag loop antennas a little directional? > Are mag loops

Re: [Elecraft] Magnetic Loop question

2016-10-19 Thread Fred Jensen
On 10/19/2016 6:42 PM, Phillip Lontz wrote: Are mag loop antennas very directional? Yes Are mag loop antennas a little directional? Yes, more than a little Are mag loops kinda directional? The fwd lobe [in the plane of the loop] is very broad, very hard to discern the peak, so it reall

Re: [Elecraft] Magnetic Loop question

2016-10-19 Thread W5RDW
Here is Pixel's info on their loop antenna. http://www.universal-radio.com/catalog/sw_ant/6142dia.jpg - Roger W5RDW -- View this message in context: http://elecraft.365791.n2.nabble.com/Magnetic-Loop-question-tp7623550p7623552.html Sent from the Elecraft mailing list archive at Nabble.com

Re: [Elecraft] Magnetic Loop question

2016-10-19 Thread Charlie T, K3ICH
Reflector Subject: [Elecraft] Magnetic Loop question Are mag loop antennas very directional? Are mag loop antennas a little directional? Are mag loops kinda directional? So which one? Phil K5SSR What me worry? > On Oct 19, 2016, at 9:42 AM, Richard Fjeld wrote: > > This is a fol

[Elecraft] Magnetic Loop question

2016-10-19 Thread Phillip Lontz
Are mag loop antennas very directional? Are mag loop antennas a little directional? Are mag loops kinda directional? So which one? Phil K5SSR What me worry? > On Oct 19, 2016, at 9:42 AM, Richard Fjeld wrote: > > This is a follow up to recent post from someone in California who > noticed less