Author: RMcGraw@Blomand.Net (Robert & Linda McGraw K4TAX)
Date: Sun Aug 10 22:51:39 2003
If any of you received this message, don't be puzzled. I received it too. Looks like it was generated while I was sleeping and the computer was turned OFF! Gremlins! 73 Bob, K4TAX the -- --
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Sun Aug 10 23:00:10 2003
At least the first time it arrived, it arrived with a virus like attachment, a file with two extensions the first one innocous the second one executeable. I've destroyed to keep it from popping up he
Not a gremlin, but rather a virus called bugbear. It's not on your machine, Bob, but on the machine of someone who has communicated with you by e-mail. There are two tip-offs: The sender's address co
Hello All !!!!! While looking thru antenna makers listed on the net I went to TITANEX ........ Incredible antennas !!!!! But what caught my eye was TWINCOM feedline that looks like a combination of n
George, Sorry there is no free lunch. Higher impedance lines are less lossy, that is true. But, the Twincom appears to be twin coax, and has an obvious dielectric around the wire in the picture. Thus
of way Hey George and Ten Tec Group, I have been using a twin lead coax setup for a year now. I just bought some from my local satellite service provider and it works like a cannon into Europe from m
Hi George, If it's real ladder line you're looking for, W7FG has it for sale... 73 John wb5oau To: <tentec@contesting.com> -- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Mon, 14 Oct 2002 18:46:59 -0500
Incredibly stretched truth. It has much affinity with the solid byproducts of a male bovine. Any alloy of aluminum has poorer conductivity than aluminum. Any alloy with lots of titanium will likely b
Author: RMcGraw@Blomand.Net (Robert & Linda McGraw K4TAX)
Date: Tue, 15 Oct 2002 09:09:16 -0500
I've seen various posts where 2 pieces of coax was used to run between the balanced output of a tuner and through walls and windows to get to a balanced feed line. In general, this approach totally u
I've got an 10' run of parallel sections of RG-62 between my (genuinely balanced) tuner and the wall where it meets up with 600 ohm open line. Obviously, it's a compromise, but most of us have to mak
I'm planning on putting open wire feed through a basement window by knocking out a middle window pane (removing it with care actually) and putting in a plexiglass pane with holes drilled through it f
Something to consider..... Go to your local hardware store and into the area where they sell bathroom tile. Buy their specially shaped drill for drilling holes through bathroom tile, they come in 1/8
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Tue, 15 Oct 2002 12:54:40 -0500
The wider the space the more the feed line radiates. The thin spacers of the TWINWIRE compared to the plastic ladder lines means its less affected by wind, and maybe by ice. I've used flat lines for
Author: Gary Hoffman" <ghoffman@spacetech.com (Gary Hoffman)
Date: Tue, 15 Oct 2002 20:09:08 -0400
Why would a wider spaced feed line radiate more ? It should not radiate at all, unless you are assuming there is unbalance, or poor construction. But, given proper implementation, it should radiate n
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Tue, 15 Oct 2002 19:57:41 -0500
But a wide spaced line WILL radiate. Antennas are made of slightly wider spaced parallel lines, for example the Quad, where the spacing is quarter wave. The connectors top and bottom (if horizontally
Jerry can deal with this at whatever level he chooses, but the short answer is that parallel lines do NOT radiate precisely because they are close enough in terms of wavelength for their equal and op
At typical antenna and line lengths, any differences in SWR, line input impedance and line loss are insignificant. Since you are using open wire line I assume you are using an antenna tuner in order
Thanks Jerry and everyone for all the open wire comments--very instructive & good ideas there. During the next year I hope to find out either that open wire is the best kept secret in ham radio or le