Bob, The map legend says those numbers are in "millimhos per meter". I couldn't see one greater than 30 in the US. It says seawater is assumed to be 5,000 millimhos per meter, quite a difference! 73,
Al, I also bought mine from The Wireman. I also wrapped 5 turns through two stacked #31 ferrites at each end. 73, Steve N6SJ https://thewireman.com/product/306-premium-rotor-cable-2x12ga-2x18ga/ Rich
Dave, One more thought: Years ago I put a 2-element quad on top of a 150' Douglas fir, 800 feet uphill from my cabin in a canyon. I used 800' of open-wire feeders that I built myself, in 100' lengths
Dennis, Use an antenna analyzer to see what's going on. I recently used a RigExpert AA-54 to tune up my 160M vertical with elevated radials. It provides a lot of good data! 73, Steve N6SJ I recently
Art, I have gone to Davis Bury Flex for outdoor use. The jacket is polyethylene instead of PVC. I have lots of polyethylene water pipes that have stood up to 40 years of hot sun and cold freezes. My
Jim, I put mine in for my new tower in 2011, so that's going on 12 years now. So far so good! 73, Steve N6SJ So have I, and I'm very happy with Davis RF and I'm using BuryFlex, but I don't have a dec
But Jeff, weren't you aware?...Chevy's are well- known to break down after prolonged UV exposure! (just kidding!) I dont think this is about "liking", but rather about experience with different types
How about Brasso? We always used it to clean copper cable stubs at Farinon before shipping the microwave radio racks to the field, where the copper would be terminated in a punch down block. Stuff wo
Dave, How wonderful to learn "demon rum" has had a virtuous purpose! 73, Steve N6SJ On this Saint Patrick's Day, let those of us so inclined raise a glass of Jameson's to Guglielmo Marconi: We hunt f
I agree with Herschel's recommendations, but with one additional step: Before anything else, verify there is AC power at the switch box at the tower. Nor sure how you get power to the tower from the
Chuck, I can't imagine a 2% slope would make much difference. I have two 500' Beverages in the mountains here and they drop off a good 100 feet. Or 20% slope. They work well both directions. Using th
My propane torch has a solid copper tip that slips over the end of the nozzle and is held in place with a set screw. Scary in these tinder-dry woods, but completely self-contained and portable. 73, S
Gene, I saw a permeability of 250 @ 1 MHz on the tech data. It is 35 at 700 MHz and goes down from there. 73, Steve N6SJ This link worked for me. Can't find application info for freqs below 700 MHz.
I initially had this problem in San Mateo County, near SF. The Planning Dept. wanted to issue me a "conditional use permit" which would need to be renewed every year. I explained this is not a tower
Older ARRL Antenna Books had those formulas. 73 es HNY, Steve N6SJ Morning folks and Happy New Year to all. I am looking for equations, or an on-line calculator, for open-wire transmission line using
I used 2" spacing on my acrylic plastic spacers, with 20 gauge solid copper wire, so maybe 200 Ohms impedance? But with it I could load all bands with my tuner from 80M-10M. 73, Steve N6SJ I think we
Probably a poured concrete foundation in the roof structure with the anchor bolts embedded... Just as long as they don't get rid of Schlitz, the Beer That Made Milwaukee Famous! 73, Steve N6SJ They m
When I worked at Farinon Electric we supplied microwave radio links to India's Northern Railway, to replace the copper telephone lines that controlled the switches, after copper wire thieves cut them
And does he have a fall radius of more than 200'? The neighbors might otherwise get nervous! 73, Steve N6SJ The weak spot is where it transitions from tapered to straight @ 140'. Generally it will ha
San Mateo County made that a requirement of my permit! How many ham tower installations are falling distance plus away from the property line? Many commercial towers are not either. John KK9A And doe