Tom, Exactly. In fact, the portion of the curve looked at was appropriate for each height. It showed an increase in Z at 28 M relative to 24M. The curve is on page 3-2 of the 19th Edition of the ARRL
Gollieeeee! Just what I've been looking for. An antenna that always produces 20db over 9 signal reports! Who did you work? I doubt it was that weak S2 station via long path. Info on SWR is interestin
Bill, For what it is worth, I have a GEM quad with fibreglass spreaders. I asked the manufacturer this same question. His response: Don't. He pointed out that some paints are mildly conductive and mi
Jamie, I don't understand this at all. I have two crank down towers (actually towers with Hazers) and had an EZ-way telescoping/tilt over tower. The trick is to not attach the coax directly to the to
Guys, It means nothing that a VHF RX doesn't show much noise-- if you are interested in HF operation. First of all spark transmitters are primarily MF/HF noise generators. They don't have much energy
Another way I used was a big engine jack. Position the feet over the hole , dig, wiggle, hoist and repeat. In our old clay environment water was NOT the way to go. The water/post combo would act as a
Anybody out there successfully used stepper motors to power variable caps in remote tuners? The ability to have good precision/repeatability seems idea. Chief problem seems to be obtaining one with e
George, What you say may be true in general. However, I have a circuit from the PARALLAX stamp manual which shows a single stamp chip, a ULN2003 driver chip, five resistors and a unipolar stepper mot
I once bought a HiTower used. One of the insulators was replaced with white PVC. It didn't seem to arc over at full power on 80. Apparently, the factory supplied one did at some time! However, I didn
Tom's "lead in arrow" approach seems to solve one real problem I've encountered using slingshots. The weights are not heavy enough to pull the line down to the ground through tree branches et al. It
You guys are forgetting that anything longer than 7' has to go by truck. Add at least $100 if not considerably more to the price. 73 de Brian/K3KO List Sponsor: Are you thinking about installing a to
Ice storms in Pittsburgh filled up the space with mother natures creation. Unfortunately, it takes a long time in winter to melt any ice. Solution there was a replacement car U-joint boot extending d
Sure, build it. However, leave the other wires up so you can do direct comparisons. That way you will be able to determine if you made any improvement! Alternatively, you could model what you have an
Coax-through-bead baluns have another advantage. It is impossible to tell if they have failed from the ground or SWR reading. The only way I've been able to detect damage is if they rattle. I suppose
Guys, No problem if you've got the skills and the money. Look at the full sized 3 element yagi from DJ6JC in the ON4UN Low Band DXING handbook. The elements weigh only about 250 pounds each and are m
Here are some EZNEC calcs of an 80 meter dipole at heights from 60' to 160' Clearly guys who get even dipoles high win. height max gain/angle half power angles 20deg gain 60' 6.52dbi/89deg 30deg 1.5d
Actually black is a better "color". Phylistrand guys disappear. They don't paint covert operation helicopters black for no reason. My reaction to a "no guys" edict is "no gals". The XYL here knows we
wx0b'S presentation to the PVRC has the following rules of thumb. 1 wl booms space 1 wl .75 wl booms space .87 wl .5 wl booms space .707 wl .25 wl booms space .5 wl. The following note is also attach
I queries WX0B about the rule of thumb regarding "optimum" stacking height. Here was his response: ** For HF antennas over ground, W2PV did the math correctly and the formula is SQ rt of boom length
Bill, I understand you did extensive analyses considering the terrain around you. To what extent did this impact the stack spacing and/or final antenna heights? 73 de Brian/K3KO -- FAQ on WWW: http:/