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Total 1524 documents matching your query.

141. [TowerTalk] stacking distances (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 8 Jan 2002 01:23:23 -0500
Very interesting. It is amazing what is in those manuals that I, like most people, never bother reading. Anyway, that's why I like the new Eznec with it's average gain! You can look to see if averag
/archives//html/Towertalk/2002-01/msg00191.html (9,010 bytes)

142. [TowerTalk] Using guy wire to carry in coax lines? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Wed, 9 Jan 2002 18:19:28 -0500
I can't speak for the mechanical issues, other than I would question hanging too much weight on a cable because you either have to have a lot more slack in the span or have a lot more tension. I'd c
/archives//html/Towertalk/2002-01/msg00215.html (10,014 bytes)

143. [TowerTalk] Are_higher_HF_antenna's_really_better? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Fri, 11 Jan 2002 10:42:54 -0500
While it is nice to have an antenna that compliments the nulls of another antenna with a nice lobe, there are other worries. All my life I have used high yagi's, and never have noticed a problem. Wh
/archives//html/Towertalk/2002-01/msg00291.html (10,759 bytes)

144. [TowerTalk] Re: Aluminum Masts (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Fri, 11 Jan 2002 10:52:45 -0500
I'm delighted to see someone point out the real issue. The issue is the *design*. I have aluminum masts here that, if they were steel, you would never be able to work with them. They are as strong o
/archives//html/Towertalk/2002-01/msg00293.html (8,090 bytes)

145. [TowerTalk] non-conductive lightweight mast (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Fri, 11 Jan 2002 19:12:37 -0500
Why do you need a non-conductive mast? Why not just use a short length of PVC at the top of a regular mast? If it is really fussy, you would have to insulate the mast bottom but I doubt it is. That
/archives//html/Towertalk/2002-01/msg00310.html (8,791 bytes)

146. [TowerTalk] Are_higher_HF_antenna's_really_better? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Sat, 12 Jan 2002 19:36:03 -0500
That's good advice. While all the talk about patterns over perfect flat earth with no buildings is useful in that environment, we all don't live in the country on cattle farms or on golf courses. If
/archives//html/Towertalk/2002-01/msg00332.html (10,560 bytes)

147. [TowerTalk] Remote antenna switches (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Sun, 13 Jan 2002 06:07:30 -0500
Hi Bill, Why use a DC blocked protector? The DC blocking will do next to nothing for lightning protection if it passes HF signals without a SWR bump. Lightning is a time-varying pulse, not DC. The DC
/archives//html/Towertalk/2002-01/msg00336.html (9,308 bytes)

148. [TowerTalk] low band receiving antennas options (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Mon, 14 Jan 2002 06:45:24 -0500
Hi Rick, Cone of silence lengths have little advantage for receiving S/N over other lengths, unless you happen to have noise that is concentrated in the null area. Odds are you will never know the di
/archives//html/Towertalk/2002-01/msg00353.html (11,302 bytes)

149. [TowerTalk] non-conductive lightweight mast (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Mon, 14 Jan 2002 06:45:24 -0500
You do not need a fiberglass mast. That antenna has a moderately low impedance. All you need is an ground-insulated mast (conduit is fine) with a short stub of PVC at the top to keep it away from th
/archives//html/Towertalk/2002-01/msg00354.html (8,722 bytes)

150. [TowerTalk] low band receiving antennas options (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Mon, 14 Jan 2002 12:55:46 -0500
I use my phased 800 foot long Beverages (three wide with 350 foot spacing) all the way up to 40 meters and higher. The reason they work when they are so long is the far ends don't carry any current
/archives//html/Towertalk/2002-01/msg00361.html (13,019 bytes)

151. [TowerTalk] RCS-4 ant. switch usable on 6 Meters? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Thu, 17 Jan 2002 03:05:03 -0500
The old RCS-4 is unacceptable at 6 meters due to SWR and crosstalk. It has already been revised, and will be acceptable to 100MHz. The new unit should be out in a month or so, and now safely handles
/archives//html/Towertalk/2002-01/msg00390.html (7,736 bytes)

152. SV: [TowerTalk] Copperweld radials--note (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Sun, 20 Jan 2002 18:02:11 -0500
Just use solid bare copper. There are hundreds of radio stations using radials from the 1920' and 1930's, and those radials are in good shape today. We dug some up at WSPD, they were installed in th
/archives//html/Towertalk/2002-01/msg00438.html (8,288 bytes)

153. [TowerTalk] Loss in Connectors (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Mon, 21 Jan 2002 08:17:07 -0500
The consensus is absolutely wrong, and it is easy to prove they are wrong. Here's how you can use common sense to dispel rumor or folklore. 1.) 0.2dB loss is about 5% power loss. 2.) The conductor A
/archives//html/Towertalk/2002-01/msg00446.html (10,651 bytes)

154. [TowerTalk] Force 12 Sigma 80 (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Mon, 21 Jan 2002 15:55:41 -0500
Why not just build a vertical Brad? While linear loading is generally not as efficient as lumped loading using properly designed inductors or a small capacitance hat/inductor combination, you'd almo
/archives//html/Towertalk/2002-01/msg00458.html (9,378 bytes)

155. [TowerTalk] Loss in Alpha Delta Switches ? (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Mon, 21 Jan 2002 15:55:41 -0500
Most of these indoor manual switches are imports, and I suspect many are from the same manufacturer. The MFJ switches I looked at had a lightning protector with too low a rating. With a "typical" 15
/archives//html/Towertalk/2002-01/msg00459.html (10,187 bytes)

156. [TowerTalk] Loss in Coax Switches ? Was Alpha Delpha. (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 22 Jan 2002 08:47:59 -0500
As with the coax connectors, most of us can not measure the loss in a switch. If there is noticeable loss, and if you run more than a hundred watts or so, the switch will almost instantly become "hi
/archives//html/Towertalk/2002-01/msg00482.html (10,648 bytes)

157. [TowerTalk] Force 12 Sigma 80 (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 22 Jan 2002 14:16:51 -0500
Not speaking of any vertical antenna in particular, but all vertical antennas in general we have to be careful! We can feed power into a short vertical dipole mounted near earth and it will have a l
/archives//html/Towertalk/2002-01/msg00486.html (10,136 bytes)

158. [TowerTalk] Force 12 Sigma 80 (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 22 Jan 2002 21:44:49 -0500
I enjoyed your ground loss comments, and mostly agree with them. I'm not speaking of any antenna brand in particular, but only of system in general. there is no magic bullet. But here are some intere
/archives//html/Towertalk/2002-01/msg00488.html (11,190 bytes)

159. [TowerTalk] Best coax switch (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Wed, 23 Jan 2002 10:33:02 -0500
My first coax switch was a plywood board nailed to the wall, with antenna coax cables coming in from above and hanging vertically. I soldered a heavy wire along the shields, and bent hooks in the cen
/archives//html/Towertalk/2002-01/msg00501.html (7,923 bytes)

160. [TowerTalk] Summary: Short Tower and Close Foundation (score: 1)
Author: W8JI@contesting.com (Tom Rauch)
Date: Tue, 29 Jan 2002 11:57:32 -0500
You should be insecure about the Hex beam. There is far too much hyperbole and far too few facts offered in the claims. 73, Tom W8JI W8JI@contesting.com _____________________________________________
/archives//html/Towertalk/2002-01/msg00615.html (8,135 bytes)


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