What appears to be missing in the picture you painted is the usual choking device to decouple the unbalanced feedline from what otherwise is a balanced antenna. One could construct a balanced feedlin
Many varieties of N connectors. PL259's are all the same size as far as mating to the coax without an adapter. N connectors vary greatly in the kind of coax they mate, there are many UG numbers that
One of the great unverified assumptions of low-angle propagation is that smooth, sharp decrease of gain from a horizontal antenna as the angle goes down in the last handful of degrees. This lack of v
Tucked away in many small corners of the specifications for bases and such, are such quaint phrases as undisturbed earth, among others. All of which make the right stuff not quite as "prefab-able" as
Another gotcha at my place is the long paved driveway with a 56" steel culvert pipe where Reedy Branch goes underneath (official tributary of the Cape Fear River that starts about a half mile away).
One thing I do NOT see often in these collapse discussions, is discussion of the merits of self supporting towers in these tight situations. A guyed tower is made of the same stuff at 0-10 feet as it
That double wound stuff could be bought from Air Dux. Two of them made a dandy 4:1 HF balun. The Heath was the only one I remember you could buy complete with supports. Some folks removed the stuff f
A fall from 10 feet up the tower onto concrete can kill you, bust your head open like a watermelon. Human body is just not designed for falling onto hard things. The most scared I have ever been on a
Appearances can be deceiving (both ways). Look how strong a spider web is and how tiny and thin. Also do not confuse the stuff that F12 sends with the antennas with the cheeep jjjunkkk you get in the
You are right about HIGH ANGLE close in signals. Rotating it does not make much difference. There IS a difference at low angles. You WILL have a dickens calling stations in EU if your rotatable 40m d
That's SALT water. And you need to be right up close. And the magical difference has to do with vertically polarized antennas. Fresh water doesn't do much except usually get rid of ground clutter in
ATTENUATION beyond standard, unexpected impedance transformation or open circuit. All measurable with a 259B. When water gets in, it will go south very fast. 73. one
Just make sure that no one is confused that this rough equivalence of a freshwater takeoff to what I would term halfway decent dirt is NOT to be confused or ranked ANYWHERE NEAR the spectacular low a
Hi Mel, If you have modeled a Cal-Av, you should be able to model the basic form of an F12 N element, with the linear loading folding outward, etc. Since you've done the one model, you've already cro
A tornado is trees being ripped UP. It breaks at the point accumulating most aerodynamic drag and least able to support the weight of the root ball. it's full fallen of one Towers
Hi Jamie, Note that the Mag 340/620 precedes the introduction of the "N" elements. I would guess this antenna has the old design, using support wires to the center of the element as the linear loadin
I agree with this assessment if you want rear exit with knob on front. The B&W model 590 and 590 G (grounding model) also fit this description, but with 5 positions. I have a 590 G They do come up on
THREE sources of loss in a vertical system. 1) loss in the current sink, solved with elevated radials or a dense radial system. 2) E-plane penetration of the ground and resultant lossy current immedi
Let's call that spectacularly reduced attenuation at low angles. If you haven't heard it come in driving up to and onto a saltwater beach with a mobile HF rig/whip, you've missed one of life's great