Re: Topband: Skirted vertical antennas for MF broadcast

2022-04-08 Thread Terry Conboy
Top hats could be skirts if you feed the antenna through them.  This design looks a lot like a “conical monopole”. Is there a distinction? Terry N6RY > On 2022 Apr 7, at 3:38 AM, Rich Dailey, N8UX > wrote: > > So top hats are now skirts.~ N8UX > _ > Searchable Archives:

Re: Topband: Trees (not the N6TR kind)

2013-01-01 Thread Terry Conboy
On 2012-12-31 8:46 AM, Tom W8JI wrote: Years ago, when some fellow proposed that trees would radiate because they were fractals, I measured the RF resistivity of freshly-cut pine trees. I firmly attached copper or aluminum plates to a thick one foot long trunk section, and measured resistance.

Re: Topband: I meant a full wave loop instead of a 4 square.

2012-12-31 Thread Terry Conboy
On 2012-12-25 7:40 PM, Jim in Waco WB5OXQ wrote: I meant a full wave loop If I can support a wire antenna at 50' or maybe more in tall pine trees and have 1.9 acres of space to use which would work best. Lots of tall pine trees on the lot. I assume the trees in the center of the square will

Re: Topband: Tuning 160M Dipole

2012-11-08 Thread Terry Conboy
Paul, At least in the copy of your message I received, it was a bit hard to determine where the frequency ended and the SWR began. As I understand, the SWR was 1.77 MHz 6.21 1.80 MHz 4.31 1.845 MHz 3.37 1.86 MHz 3.77 1.89 MHz 4.88 1.91 MHz 6.08 1.94 MHz 8.19 Since your antenna is

Re: Topband: Antenna analysers in close proximity to BC station.

2012-11-07 Thread Terry Conboy
On 2012-11-03 8:25 PM, WO0W wrote: Perhaps you can take a portable transmitter and manual tuner to the site. At the point where you wish to place an L network, attach the manual tuner and transmitter and adjust the tuner for a good match. Take the tuner away from the source of interference,

Re: Topband: The use of digital modes on 160 metres

2012-09-18 Thread Terry Conboy
On 2012-09-15 4:29 AM, George, VK5IT wrote: I do, however, suspect that because going digital is such an obvious answer that there must already be some activity among devotees so I would be interested in hearing what frequencies and what modes are used on 160 meters and any comments. 73 George,

Re: Topband: Topband list and 630 Meters - the decision

2012-02-22 Thread Terry Conboy
This link worked for me: http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com On 2012-02-22 8:14 AM, ZR wrote: Sorry about that, I went to bed without testing the link and forgot about the subscription process. I hope everyone has the correct info now. Any questions send me a direct email.

Re: Topband: Another non-traditional antenna working.

2011-11-17 Thread Terry Conboy
See http://www.w0uce.net/K2AVantennas.html On 2011-11-16 12:22 PM, Rik van Riel wrote: On 11/16/2011 12:10 AM, Guy Olinger K2AV wrote: We are testing N3ND's new 160 antenna tonight (Monday local time) 1818 @ 0005Z. This is another antenna based on RBN validated untraditional design. 73,

Re: Topband: bottom fed antenna causing broad band signal?

2011-10-29 Thread Terry Conboy
On 2011-10-24 4:10 PM, BRYON PAUL n0ah VEAL wrote: I have a good friend who has a 1/4 wave 80 foot vertical (63 feet) who decided to put a 100 foot coil to bottom feed the antenna for 160M. Using a tuner, (no UnUN) he is resonant at 1.830 but the signal is very broad banded at 4 miles

Re: Topband: coax cable counterpoise

2011-10-03 Thread Terry Conboy
On 2011-09-24 6:32 PM, Bob Kupps wrote: Hi when I lived in the Mojave desert I fed my 70' crank up tower as a folded monopole on 160m and used 8 radials made from electric 1/4 waves of old coax cable laying on top of the ground. The center conductors of the radials were fed with the shield