Mark, If you are using a 1/2 wave dipole the wire on the ground should be unbroken and 5% longer. You can run two or three parallel wires spaced a few feet apart or just one wire. If you are using a
Author: "WA3GIN in King George, VA" <wa3gin@erols.com>
Date: Sun, 28 Aug 2005 13:07:16 -0400
Consider this...today you might be thinking of a 6sq ft antenna...next year you might be thinking of a 15sq fto antenna...you can always go to a larger antenna, you can't upgrade the base if you skim
Author: " WA3GIN in Alexandria City" <wa3gin@erols.com>
Date: Mon, 29 Aug 2005 21:21:53 -0400
The Rohn 25 house bracket works perfectly for this tower. All you need is to fabricate a steel strap to hold the tower to the bracket with bolts. I did this for my TT-40. The tower was up 20+ years.
When the place burns to the ground they will wish they had the tower, DUH! _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weath
Guess it will be illegal to take a pee in your county soon...as that stuff eventually makes it way to the river as well! OH WELL! ;...-( ...that eventually drains into a river where people can fish f
KC9DAO has some fine quality mast clamp products... I've purchase a couple and find them to be very high quality, constructed of aluminum and stainless steel. Check it out at " http://www.penninger.c
Those that are cranked down and nested. But if an airborne 18 wheeler tractor trailer hits the tower expect a total loss! _______________________________________________ See: http://www.mscomputer.co
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Sat, 19 Nov 2005 12:36:35 -0500
That dropping concept in reality works fine. Most of the radiating work is done much closer to the feed point, the first 1/8 wave of wire either side of the feed point. 73, dave wa3gin --Original Mes
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Sat, 19 Nov 2005 13:13:14 -0500
At height he is using it's a NVIS antenna...a few feet of droopy elements isn't going to make a noticeable difference in his short skip performance. 73, dave wa3gin The whole antenna is importand, do
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Sat, 19 Nov 2005 13:14:25 -0500
Don't know why you can't get it to work OM. I've got a 3 E 40m beam built that way and it works great...maybe your antenna is installed over a iron ore deposite??? 73, dave wa3gin --Original Message-
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Sat, 19 Nov 2005 14:49:49 -0500
Sure...the time you spend trying to squeeze a db out you could work 100 stations...play more squeeze less! 73, dave wa3gin True ofcourse, but every dB counts, atleast in my book. If I don´t hav
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Sat, 19 Nov 2005 14:50:58 -0500
Gee, a theoretical .2db...that theoretically could amount to how many missed contacts - .001, haha 73, dave wa3gin --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounce
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Tue, 22 Nov 2005 23:15:51 -0500
Rubber begins to decay almost immediately after it is pressed into shape. That is why tires on RVs although they have only a few thousand miles have to be replaced. They aren't safe after more than t
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Thu, 8 Dec 2005 20:28:08 -0500
Question: Installed a ½ wave 40 meter dipole 10ft above the penthouse roof which is 410ft above sea level and 210ft above average terrain. The dipole is almost perfectly horizontal. We get a d
Its not just for safety. Typically, a 1/4 vertical over a reasonable radial system will have a low input impedance of about 25-30 ohms. The coil shunted across the input raises the input impedance to
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Tue, 27 Dec 2005 19:41:21 -0500
It is a monument to Ham Radio in the USA much like the mid-century TELREX rotating 100ft pole were in their season. BRAVO and Happy New Year to all that helped build that beautiful monster array! 73,
Author: "WA3GIN in Alex. City, VA" <wa3gin@erols.com>
Date: Wed, 18 Jan 2006 21:16:48 -0500
I've successfully done the same thing with a 50ft tower. It's a lot of work to install. There will be a lot of weight on that bearing just above the rotor. Might be easily to just hire someone to swa
Hi Jim, ...I use a cage 1/4 wave vertical on 40 meters. Using two hulla hoops and 12 wires. The vertical has a usable bandwidth of about 1.5Mhz. ...I use 2" irrigation tubing for a dipole on 40 meter
NO its is for bandwidth... sometimes I stuff a screwdriver mobile antenna on each end and use it as a 160 - 40m remote tuned dipole ;-) 73, dave wa3gin _______________________________________________
Makes sense...I was speaking to a fella working on a 400ft self supporting tower in Maryland. The State Police are revamping the entire network and these 400ft towers are going up all over the place.