I haven't used RG-6 much for ham applications, but have hundreds of feet installed for satellite TV here. There are several reputable brands, such as Belden, Commscope, etc., but a lot of junk also.
Of course an absolute zoning prohibition of antennas is in violation of PRB-1, but you already knew that. Around here, there would be a much louder cry about clearcutting forest land than for the tow
All issues of HR are available on CD-ROM; <http://www.arrl.org/ catalog/?category=CD-ROMs#HRCD>. 73, Bob N7XY _______________________________________________ _________________________________________
A big part of the problem is that it keeps getting to be more complicated (and more expensive) year after year. In 1956 I went to city hall and asked the zoning administrator about putting up a tower
Home Depot carries these as well. Bob, N7XY _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://list
I have been using Clearwire WiMax for the past three months. It appears to be growing rapidly in this area as they add more coverage, but isn't yet available in most parts of the country. I believe t
Actually it's McCaw money. They are partnering with Sprint/Nextel to expand coverage nation-wide. _______________________________________________ _______________________________________________ Tower
I would be very wary of doing that, since the higher temperature required for silver soldet would likely melt the foamed dielectric of the cable. perhaps a F compression connector and an adapter like
Towertalk archives are at <http://lists.contesting.com/pipermail/ lists.contesting.com/archives//html/Towertalk/>. 73, Bob N7XY _______________________________________________ _______________________
I once used RG-400 to feed an elevated 80 meter dipole. It has a teflon dielectric (similar to RG-142 except that the center conductor is stranded copper instead of copperweld) so power handling wasn
If you need high breakdown voltage (not usually an issue with 50 ohm systems), sulphur hexafluoride is sometimes used. _______________________________________________ _______________________________
"A thing of beauty is a joy forever" --John Keats "Beauty is in the eye of the beholder" --Margaret Hungerford 73, Bob N7XY _______________________________________________ ___________________________
Hmm, it's different in my copy (4th edition (1956), chapter 20): (276/(epsilon^.5) * log10 (2D/(2*d1d2)^.5) for d1, d2 << D I suspect (but haven't checked) that the formula Rick gave may be more gene
All of the above. Gain is a ratio. It is normally expressed in decibels (dB), which is 10 log (P/P0) or 20 log (E/E0). Since P = I^2R = E^2/R, gain in decibels is independent of whether you are measu
I had a Hy-Gain vertical in the late 1950s with a light blue base insulator and traps. Bob, N7XY _______________________________________________ _______________________________________________ TowerT
I recall an excercise in graduate EM class I took many years ago. You draw the geometry and break it up into squares. Each square has an impedance of 376.7 ohms in free space and you calculate the ch
DJVU is a somewhat-obscure document format, somewhat like PDF. There is a link on the BAMA website to a viewer. Bob, N7XY Bob Nielsen n7xy@clearwire.net ______________________________________________
I don't recall many analyzers available 50 years ago. Of course, tube transmitters were a bit less critical. I use the Tenna-Dipper with my MP-1 for portable use. It's easily worth the $25 I paid for
And I bet you also carry a large quantity of batteries for them :^) 73, bob N7XY _______________________________________________ _______________________________________________ TowerTalk mailing list
When I worked on antenna ranges (a long time ago) I purchased Heliax many times and it was packed that way for lengths too short for a reel. Bob, N7XY _______________________________________________