Re: [Elecraft] Magnetic Loop question

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

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

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

[Elecraft] K3 Freq jumpnig when cold (50F or so)

Have our club's K3/100, serial # 67xx. When it is cold (FP=11C 52F ), increasing the frequency using VFO A or VFO B causes a 1MHz jump DOWN in frequency. When reducing frequency the failure is much less frequent and it will also jump down 1 MHz. At times while tuning up in freq there are some

Re: [Elecraft] K3 Freq jumpnig when cold (50F or so)

Bill, Try loading beta firmware 5.54 to that K3 and see if that behavior continues. That firmware improves the flash memory interface. I can't say for sure if it will fix that K3, but is worth a try. 73, Don W3FPR On 10/20/2016 10:16 AM, Bill Coleman wrote: Have our club's K3/100, serial # 6

[Elecraft] KX2 FM

Will we see FM on the KX2 as it can be used with the 10 meter repeaters also when used with a transverter for 144 MHz? Don G6CMV --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___

Re: [Elecraft] Magnetic Loop question

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

[Elecraft] Mag Loop

Having played with a Loop, I made one octagonal about 64 inches across, and mounted it vertical or perpendicular to the ground, I observed sharp nulls through the center of the loop. Additionally, I took a 4 or 7 watt flurescent bulb and while transmitting (low Power) ran the bulb from top to botto

Re: [Elecraft] Mag Loop

Well Morgan ... Your fluorescent bulb is responding to the voltage/current nodes around your octagon. Your loop is coupling to free space using the H-field, to which the bulb is pretty much insensitive. Because an electrically small loop couples via the H-field, it tends to be fairly insensi

Re: [Elecraft] Magnetic Loop question

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] K3 Freq jumpnig when cold (50F or so)

Thanks Don.I put on 5.54 The K3 is behaving differently No more jumping down 1MHz. What it is doing now: there's still a relay clicking once in a while as I tune VFO A - this is within any given ham band. Now, while tuning VFO A, VFO B will jump frequency. Example: VFO A = 3.853, p

[Elecraft] W6SFM Bug Roundup Event Coming Soon

Announcing W6SFM'sBUG ROUNDUP The Samuel F. Morse Amateur Radio Club, a Sacramento, California based CW enthusiast club wanted a special time to bring bug operators together on the air. In the same spirit as ARRL's Straight Key Night, participants are encour