" I don't know about Home Depot but Lowe's carries the Compression Home Depot carries these as well. " This is my favorite part about RG-6!! Although, to be honest, I live 40 minutes from The RF Conn
"solder through the heavy oil film, and you can get the solder to bond the aluminum and copper together. Have never tried it, but it would be interesting to try." I DID try it last year sometime, but
I get BCB interference problems with my MFJ-259 on my little 60 foot vertical on topband once I get the coil taps close. If you're getting anywhere close to resonance on 160 and are anywhere close to
"and while having a LOT is better, it's probably only about 6 dB better. That's a good reason for adding radials, but it's not a reason for staying off of 160 if you can't! :)" Yep, I have about 30 m
I just use a footswitch to switch two relays. One is a coax relay that selects the transmit antenna or the RX antenna. The other is a 3PDT relay that allows me to do a few things: 1) Lock out transmi
Yeah, it'll work better as an inverted L than a base loaded vertical at that height... but you'll get a fair bit of high angle horizontally polarized radiation from the "top loading wire" ... not ne
Several tens of wavelengths as ground reflections interfere with the direct radiation from the antenna to form the pattern... But good moist conductive earth at the base of the antenna could allevia
I'd believe that. The voltage across the coil will tend to be pretty fierce. 500W seems to give about 7600V across the coil. Full legal limit would be 13kV. Commonly done and generally a decent way t
"I read that the doorknob caps can't handle the current" That's probably right... I stand corrected. _______________________________________________ _______________________________________________ To
"Somewhere I have the modeling data which shows a modest improvement in radiation resistance when the top-hat wire is horizontal (as compared to sloping), but it's not a make or break difference. " I
N3RR has a site about his planning and execution of his big tower: http://users.erols.com/n3rr/ _______________________________________________ _______________________________________________ TowerTa
If you go to N4MC's Vanity HQ http://www.vanityhq.com/ There's a link to a "hams in your zipcode" *MAP*, which I think is pretty cool. I can't seem to link directly to it, I think vanityhq.com is a f
Of course not. I think they can just recycle the mercury, plus all fluorescent bulbs contain it as far as I know. There's probably a recycling center near you... but that's still kind of a pain... c
Imagine a pair of yagis in free space. What one hears from the other one depends on their relative orientation, correct? The pattern of an antenna in free space is an interference pattern... the rad
Where do you live that cutting a chunk off a 2 foot concrete filled steel tube and upending it into a hole is cheaper and easier than getting concrete delivered ;-) Maybe it's just cheaper... Anyway
Steve, Formula for volume of a cylinder is Pi times the radius squared times the height... area of the circular opening times the height. For a 2 foot diameter pipe 8 feet long, google calculator giv
If you wait long enough and sample enough signals in both directions you'll find that usual ionospheric propagation is going to be pretty reciprocal. The addition of random ionospheric shifts in amp
I've had my breakfast and coffee and plenty of time after to think about it and I'm still left muttering "time reversal symmetry" The best I can do right now is this: http://uw.physics.wisc.edu/~wal
Who needs drilling and fittings? Buy some carbon fiber fabric, some epoxy, and really good gloves. Sand the boom a little. Make a jig to hold your aluminum element center section at a right angle to
I just want to SECOND this comment. Jim clearly put a lot of time into writing it and if you read and over time make it part of your thought process while dealing with antennas, you'll be able to el