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Robert, Do you really mean 1/4 wave dipole (each leg being approx 5 meters long)? Or do you mean 1/2 wave dipole (each leg being approx 10 meters long)? Are you specifying the length of each leg, or
For completeness, when looking for guy wires that don't interfere with HF antennas, you need to look at fiberglass guys as well. In the quantity I used, they were cheaper than Phillistran and cheaper
Guy, All the points you are making, I have never heard anyone complain about, including the 486/f "thing". What, BTW, is that all about? That formula is an approximation. I've used it for years and n
I find it amazing that any ham would not want to ensure that his/her antenna system is safe! Without knowing the mechanical details of the house mount (the loads and capability of the house and the m
Bob is absolutely right. Read today's Wall Street Journal for an example - 7 World Trade Center insurance claim - Page 1. Insurance Companies *know* how much it will cost for claims based on actuaria
Before you blame or compliment an antenna, determine the complete loss/gain including feedline losses. Be sure you're not overlooking something in the system. Are all three antennas pointing in the p
Ford, Check out my website: www.erols.com/n3rr Click on "All design links" then "Cabling subsystem". You don't say what frequency you're interested in, but the tables in the cabling subsystem webpage
Recognizing this is the "TOWER" reflector, nevertheless, the purpose/use of the antenna system on the tower must be paramount in importance, and in fact, determining the design. For single op, all-ba
Anyone interested in lightning protection needs to go to my website: www.erols.com/n3rr and check out the link Lightning Protection Subsystem. Much of what's been/being discussed here lately is answe
Look at it as less than 1 dB difference. That's 1/6 of an S-unit, which is insignificant. The 270 ft of Belden is "better" since you avoid additional connectors and their additional loss and failure
There are several considerations, but addressing the lightning issue for coax attached to the outside of a tower: There is no lightning issue if you ground the shield of the coax at the top, close to
I'll try keep it short: The amateur radio "rule of thumb" is as I have stated in my post - Using a ground kit (or equivalent), ground the coax to the tower at the top (or close to the antenna) and at
Ford, You are "missing" BALUNs at each antenna. Think about it. The beads you installed acted like/as a BALUN and isolated your 40M dipole from the switch and everything else. That's the reason why o
This is a multi-part message in MIME format. --=_NextPart_000_0016_01C1C295.3D150D30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, mine plays GREAT