Only if you mount the cage dipole in free space! Any dipole mounted somewhere above a good ground, could have some gain in some directions ... compared to a dipole in free space ... and so it would
But that is EXACTLY what it means!!! Anything else is inexact science, not even science, and would require a disclaimer that all numbers have an error tolerance of +/- 10 dB or so because we don't r
That raised rim is a recent addition. Most don't have it. The blank plug addresses the problem of accidentally turning it on when you store it, which was/is a frequent problem. As far as I know, the
The original Appendix F that this one replaces, apparently was adopted in Dec. 2000 and became effective Jan. 1, 2001. You can find the original one, currently in effect, at http://www.franklinmo.org
Also search for open wire lines. How much does the exact impedance mean to you? Do you have a 450.0 ohm antenna on the end of your line? One of the advantages of ladder/open wire line is it tolerate
Since 2005?? _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listi
The characteristic impedance is dependent on how the cable is used ... which wires are signal, and which ground. For example, G-S-S-G is different than a G-S-G-S-G configuration. Not having done a t
Just another data point ... I believe it is standard for AM broadcast stations to match the tower to the feedline right at the base of each tower, even with their monster coax or when they had balanc
The (old, no longer used) feedline I saw, I'm pretty sure was balanced. It had just two wires, with pairs of glass insulators. If they had been unbalanced in that arrangement, I think it would have
So why do those KFBK towers use unbalanced feedlines? As center-fed antennas, wouldn't the feedpoints be essentially balanced? Andy _______________________________________________ __________________
There is an array not far from here of about a dozen tall wooden poles, visible from a mile or two. I've read that it supports a Sterba array. Sorry I don't know the operator's call off-hand (now in
The one near me is W1EVT. Some claim he got funding from the government when he built it, because it was useful for locating precise directions of foreign signals in the early Cold War. (I don't know
He reminds me a bit of Edwin Armstrong on towers. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http:
I've been looking at that logo all day today. Can't figure out what that fan thing is supposed to be. What is it? _______________________________________________ ____________________________________
I guess I wasn't clear in my question yesterday. Yes, I know about Tesla coils. And I understand how the corona in the "oo" and the part that makes the top of the "g" are representative of a Tesla co
The exterior of the John Hancock tower is mostly glass. Pittsburgh Glass supplied the glass. They knew the windows wouldn't survive, they told the architects they wouldn't work, but they insisted on
Ahh, you mean "the building formerly known as the Sears Tower". I do not understand the need to rename everything. But I suspect this one might always be known as the Sears Tower, in spite of its la
I'm surprised there hasn't been more response, so I'll throw in mine. Take mine with a grain of salt. The lightning rods and wiring ought to be done according to your local codes / national code, and
Sign up here: http://groups.yahoo.com/group/LightningProtection/ I will mention that it is a tightly moderated group. The moderators may answer questions directly to you without your email making it
the That is true of the total net reactance. Antennas in general do have both, distributed along their elements; as do tuned circuits; but when you look at the terminals, you see only the net reacta