Search String: Display: Description: Sort:

Results:

References: [ +from:mikewate@gmail.com: 1109 ]

Total 1109 documents matching your query.

141. Re: Topband: 1820 spur (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Fri, 2 Nov 2012 22:30:55 -0500
Hi Tim! Yes, as Joe stated, multiple sources is probably right. But I'd like to find out what they are. Every time I operate my R-4C, I think of you. I have four Sherwood filters in it that I bought
/archives//html/Topband/2012-11/msg00021.html (7,857 bytes)

142. Re: Topband: 1820 spur (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 3 Nov 2012 18:13:58 -0500
I understand that. I have heard weak spurs on multiples of 10 kHz that come and go on the low end of 160 ever since I put up Beverage antennas here. But the one on 1820 is the strongest I have ever h
/archives//html/Topband/2012-11/msg00046.html (8,699 bytes)

143. Re: Topband: Beverage Antenna (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Fri, 9 Nov 2012 14:02:16 -0600
That is excellent advice! 160 is a band for vertically-polarized antennas (such as an inverted-L or shunt-fed tower with radials lying on the ground.) http://www.w0btu.com/160_meters.html 73, Mike ht
/archives//html/Topband/2012-11/msg00102.html (8,010 bytes)

144. Re: Topband: Beverage Antenna (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Fri, 9 Nov 2012 18:24:54 -0600
Have you ever thought of using a 2-wire bi-directional Beverage? They are not complex at all. It only takes one more wire, two more simple transformers, and one more run of coax. A remote relay and f
/archives//html/Topband/2012-11/msg00104.html (8,278 bytes)

145. Topband: Total Length of Inverted-L wire? (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Fri, 9 Nov 2012 19:52:25 -0600
84' + 104' ... I take it that's an inverted-L with a total length of 188'? That's interesting, Guy. I've been playing with different lengths of wire in EZNEC+ 5, for a 160 Inverted-L here with a 55'
/archives//html/Topband/2012-11/msg00107.html (7,950 bytes)

146. Re: Topband: Beverage Antenna (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Fri, 9 Nov 2012 21:41:34 -0600
That's a good question. :-) Maybe it has something to do with the tension each one will stand. I think that CW or plated steel fence wire will stand a lot more tensioning than coax. 73, Mike www.w0bt
/archives//html/Topband/2012-11/msg00109.html (10,325 bytes)

147. Re: Topband: Vertical Array Over Uneven Ground (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Wed, 14 Nov 2012 00:35:12 -0600
I never found a way to model an an antenna over anything but flat, level ground. Not in EZNEC+ 5.0, anyway. 73, Mike www.w0btu.com _______________________________________________ Topband reflector -
/archives//html/Topband/2012-11/msg00196.html (7,526 bytes)

148. Re: Topband: Covered /bare antennn wire (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Thu, 15 Nov 2012 11:56:48 -0600
Why not prevent the static buildup in the first place? I use 33K resistors from each wire to ground. Schematic is at http://www.w0btu.com/Beverage_antennas.html . The components in parallel with the
/archives//html/Topband/2012-11/msg00226.html (7,378 bytes)

149. Re: Topband: Covered /bare antennn wire (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Thu, 15 Nov 2012 13:07:00 -0600
Hi Bruce, Sure, and I'd be interested in knowing that, too. :-) I should add that the GDTs were added after a lighting hit in the vicinity caused windings to open up on the transformers. The GDTs wer
/archives//html/Topband/2012-11/msg00233.html (8,937 bytes)

150. Re: Topband: Covered /bare antennn wire (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Fri, 16 Nov 2012 16:39:13 -0600
discharge, it seems to me that at least some of this could be eliminated by either: 1. Eliminating all the sharp points 2. Properly covering all the sharp points with suitable insulation such as hea
/archives//html/Topband/2012-11/msg00261.html (10,131 bytes)

151. Re: Topband: beverage layout (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sun, 18 Nov 2012 16:39:19 -0600
Hi Jorge, Beverages don't have to be either straight or level. It would be better if it was straighter, but if that's all you can do at your QTH then by all means put it up that way. My "Europe/Austr
/archives//html/Topband/2012-11/msg00296.html (7,374 bytes)

152. Re: Topband: beverage layout (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sun, 18 Nov 2012 17:10:39 -0600
_______________________________________________ Topband reflector - topband@contesting.com
/archives//html/Topband/2012-11/msg00297.html (10,201 bytes)

153. Re: Topband: 2 wire beverage question (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Wed, 28 Nov 2012 12:21:49 -0600
There is no practical difference, unless the wires happen to be widely spaced. (But Tom knew that. :-) Some people want to build their Beverages with the wires a foot apart. In that case, one wire ov
/archives//html/Topband/2012-11/msg00440.html (8,006 bytes)

154. Re: Topband: Inverted L SWR Jumps ??? (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Wed, 28 Nov 2012 14:03:24 -0600
I second that! Being acquainted with Tom over the years and reading his informative posts has wonderfully enriched my enjoyment of radio. :-) 73, Mike www.w0btu.com __________________________________
/archives//html/Topband/2012-11/msg00444.html (9,870 bytes)

155. Re: Topband: 2 wire beverage question (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Thu, 29 Nov 2012 10:14:01 -0600
Rick, Why don't you just mount them on permanent posts (or trees) 10' high? That's what I and many others do. That ought to let you mow around them without taking them down. My support posts are 100'
/archives//html/Topband/2012-11/msg00462.html (9,321 bytes)

156. Re: Topband: 2 wire beverage question (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Thu, 29 Nov 2012 10:24:33 -0600
Two 10' high 14 AWG wires spaced 12" would have an impedance of 710 ohms. The impedance of both wires to ground would be 357 ohms. 73, Mike www.w0btu.com _____________________________________________
/archives//html/Topband/2012-11/msg00463.html (8,537 bytes)

157. Re: Topband: Beverages 2 basic questions (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 1 Dec 2012 13:34:47 -0600
The hams with Beverages that cover more than four directions likely have Beverages with a 3 dB beamwidth narrower than 90 degrees, such as: 1. A single Bev 1.5 or 2 wavelengths long 2. Two of them po
/archives//html/Topband/2012-12/msg00023.html (8,405 bytes)

158. Re: Topband: Beverages 2 basic questions (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 1 Dec 2012 13:41:58 -0600
Please let us know how that works, Carl. I'd love to experiment with a Slinky. If brass Slinkys aren't available anymore, then we could wind one from some Close-wind it first, then stretch it to the
/archives//html/Topband/2012-12/msg00026.html (8,216 bytes)

159. Re: Topband: Beverages 2 basic questions (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Sat, 1 Dec 2012 13:47:14 -0600
It does? http://www.w8ji.com/slinky_and_loaded_beverages.htm Maybe Tom and Carl are both in on this conspiracy. ;-) 73, Mike www.w0btu.com _______________________________________________ Topband refl
/archives//html/Topband/2012-12/msg00027.html (7,838 bytes)

160. Re: Topband: one-way propagation (score: 1)
Author: Mike Waters <mikewate@gmail.com>
Date: Tue, 4 Dec 2012 16:08:32 -0600
I've often thought that some "one-way propagation" is simply due to the differences in antennas. For example, two stations with the same power, ambient noise level, etc. are receiving on Beverages po
/archives//html/Topband/2012-12/msg00131.html (8,487 bytes)

Current List: 141 - 160
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
This search system is powered by Namazu