Perhaps we are not concerned about shielding at all but just want the lowest loss cable available, and it is shielded this way. Keith NM5G unbalanced RG8X and I'm guessing with a braid on The point i
I saw that photo and was also awe-struck with the apparent lack of concern for tower climbing safety. Keith NM5G --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@
Age old question. It's hard to find a female PL259, which should be taken as a message: "Use a barrel connector." The insertion loss is negligible to at least 400 MHz. Keith NM5G Reading the info on
What is the insertion loss below 400 MHz? Number in dB please. Keith NM5G Bill, the barrel connectors are double-ended SO-239 females, intended for use as a union between two PL-259 male coax lines.
Above 150 MHz I would think most folks are using "N" connectors. The only exception would be mobile 70 cm operation, and a barrel connection should not be necessary. Keith NM5G --Original Message-- F
BURY-FLEX Interesting name. Seems like some sort of oxymoron. Just thinking of other things that hams might bury, imagine a flexible ground rod, or water pipe, or electrical conduit, or Rohn SB45G Sh
You would have a slightly lower elevation angle. This may be desirable for those long-range DX contacts but it also means you will be slightly less effective in stateside contests. I currently have a
A typical LPDA design gain is about 3 dBd down from a typical 3 element Yagi, and almost 2 dBd down from a typical 2 element Yagi. The tradeoff, as you have indicated, is a nice flat VSWR over the en
Having recently taken delivery of two ICE 419A combo bandpass filters ordered through Array Solutions for use in a DXpedition next month, I am looking for any input on the best way to implement these
Thanks to all who offered advice. Looks like these filters should do a good job for our two-transceiver operation as VP8WWW in the Falklands. Power limit there is 150 watts so amplifiers will not be
I have a Paladin solder sucker. It is far more effective than any other method I have used, including the wicking braid. But, the easiest method may be a heat gun. It works well for circuit boards th
I use pipe. Each pipe is buried about 5 feet with a few inches of gravel at the bottom and about 4 yards of concrete. A friend who is also a CE for the county came by to see the installation just aft
Interesting point. The block that is underground is approximately 3 feet wide and 5 feet long (in direction of guy) if memory serves. Anybody on this list that can figure the lateral force required t
Just went out to measure the top, which took a bit of digging as it is about 6 inches below ground level. Looks to be 4 feet by 5 feet by 5 1/2 feet deep. Soil is sandy loam to 3 feet, then iron ore
Just went outside and measured one of my pipes. It is 4 1/2 inch OD, 1/4 inch wall. It is galvanized and filled with concrete. These were installed in 1999. There are 4 guys installed. They have held
I think this pipe is fairly common in the oil and gas distribution business (short haul). I drew up the design on a piece of paper and gave it to the welder. He used 1/4 inch steel plate for the guy
I would say not al all effective. To my knowledge a radial system is used as the second half of a vertical 1/4 wave radiator (Marconi antenna). Keith NM5G I have sloping 80 meter dipoles of a 90' tow
Higher is better. The current elevation (18 feet) is probably sufficient for operation on 20 meters. Moving up to 36 feet will improve operation on 40 meters significantly. I like to have a dipole up
My barn is built on 4X6 20-foot Wolmanized pine posts set in concrete to a depth of 4 feet. It was erected in 1977. There is no evidence of rot. Keith NM5G I think setting timber in concrete is a bad
The difference in the two is likely power handling and loss rating. The bigger size probably has a larger center conductor, better dielectric material and shielding, which normally gets the higher ra