Radials on the ground are not resonant. In that application you don't care about resonance as they are simply a device for collecting the return currents and increasing conductivity in the ground. Q
The only resonance effects occur when the radial system is insufficient to provide a proper return. No matter the length of the radials, when there are enough radials that the spacing between the en
All of the credit for debunking the myth goes to Tom, W8JI. I have only referred people to Tom's work. On the other hand, since the folded monopole does provide an easier way of feeding and matching
Even a reasonable "ground" followed by a single common mode choke should be an improvement over the same common mode choke as some random position on the feedline. Assuming the "ground" has an imped
Correct. Also correct. Absolutely not. Your interpretation is incorrect. The vertically polarized radiation is proportional to the integral of the current from the feedpoint to the junction of the "
Dave, Given your ground conditions, I'd suggest looking into the pennant or flag antennas. The flag was developed by K6SE as ground independent receiving antenna to avoid the ground dependence proble
If you already have a wire inverted L, it's not that hard to convert to a trapped antenna using either the Reyco traps or home made coaxial traps. See the info from K1ZM many years ago concerning the
Assuming the technology of the K7JTR 4 sq controller is the same as his 8 antenna design it is a single band design where the DXE (W8JI) controller uses crossfire phasing which works on both 160 and
That still doesn't answer the question. The 8 element design could be used on any band but the phasing was such that it was correct only over a narrow band. The W8JI "crossfire" design hold the phas
The key is how well the shields of the feedlines are decoupled. If the feedlines are elevated - or even on ground - the shield can act like a "Beverage on Ground" (BOG) and will impress a signal on
As pointed out previously, the same can be said of FT5GA who compounded the problem by going QRT during times of best propagation to North and South America. On the other hand, operations like K7C,
Sorry, Jim. Even if contests were scored using grids or fields as multipliers and distance for QSO scoring, the northeast US would have an advantage among US stations and south-central Europe would h
Perhaps it makes sense to prepare all of the W/VE/XE cards, bundle them and ship them to someone in the US who can put US postage ($0.44 US, $0.75 VE, $0.79 XE) and mail them. It might take a little
Steve, That's the entire issue ... ARRL 160 is a 160 Sweepstakes and should be scored that way. DX countries should not be multipliers and DX QSOs should not count. I won ARRL 160 Single Op from Ohio
Back in "prehistoric times" there was no HP/LP division only single/multi op. I think nighttime power restrictions were still in effect back then. I am referring to #1 overall. With the modern rules
It doesn't even have to be connected to something plugged into a different outlet. If the equipment is connected to a tower ground (e.g., transceiver/antenna) and the tower ground is not bonded to t
Using EZNEC to do some quick model comparisons - looking for trends and not exact values - the effect of a higher antenna depends on the relative sizes and separation. If the bottom antenna is much
Somewhere in the distant past I heard or read a rule of thumb that said the top loading contribution of a yagi was about 1.8 times the turning radius it the antenna was relatively "square." That is
Tony, As shipped all of the MonstIR elements are floating. You see a change in resonance because of the coupling via the coax shield to one side of the driven element. That effect is very difficult t
Since the drive element connection for an HF yagi or 80/40 meter dipole tends to be at a HIGH Impedance point when the tower is shunt fed, the typical common mode choke - even one with 3 - 5K chokin