Search String: Display: Description: Sort:


References: [ 38 ]

Total 38 documents matching your query.

1. Topband: Need RI (score: 1)
Date: Thu, 29 Jan 2004 01:26:48 +0000
I've been looking for a RI QSO to complete my QRP WAS on 160m. Nothing heard from RI in ARRL 160 or CQ 160. Is there anyone in RI with a pretty competitive station that would be willing to work with
/archives//html/Topband/2004-01/msg00298.html (6,685 bytes)

2. Re: Topband: dynamic range (score: 1)
Author: "Bob Tellefsen" <>
Date: Fri, 6 Feb 2004 08:57:48 -0800
Thomas My take is to calibrate the Smeter at 50 uV for the band on which it matters to me at the moment. If I'm working the 160m contest, that's where I calibrate it. It only takes a few moments on a
/archives//html/Topband/2004-02/msg00114.html (8,219 bytes)

3. Re: Topband: mfj-1026 ? (score: 1)
Author: "Bob Tellefsen" <>
Date: Mon, 8 Mar 2004 08:48:11 -0800
Javier The MFJ1026 is an excellent tool. Like all tools, it must be used correctly. It relies on a noise pickup antenna to provide the noise sample. The MFJ1026 tries to remove that noise from the ma
/archives//html/Topband/2004-03/msg00091.html (7,800 bytes)

4. Re: Topband: Inverted L bandwidth (score: 1)
Author: "Bob Tellefsen" <>
Date: Mon, 8 Mar 2004 09:25:52 -0800
Jon Based on what I've read, plus my own experiments with 160m antennas, I think you are correct. The readings are suspicious. You should see a narrowing of the bandwidth with an improved ground plan
/archives//html/Topband/2004-03/msg00093.html (7,334 bytes)

5. Topband: DX When? (score: 1)
Author: "Bob Tellefsen" <>
Date: Wed, 10 Mar 2004 16:52:52 -0800
I see a lot of DX contacts discussed here, but mostly by midwest to eastern US and VE stations. Are there any W6 stations working DX, and if so, when? I don't hear anything in the evening. Is DX main
/archives//html/Topband/2004-03/msg00141.html (6,513 bytes)

6. Re: Topband: 3B9C In Florida/ Receive Antennas (score: 1)
Author: "Bob Tellefsen" <>
Date: Thu, 25 Mar 2004 17:12:11 -0800
Thomas I use a Flag loop aimed east with my TX vertical only 30 ft away. I'm able to open up my TX antenna so the vertical is disconnected from the matching network. At this point it ceases to reradi
/archives//html/Topband/2004-03/msg00265.html (8,105 bytes)

7. Re: Topband: Front-end savers? (score: 1)
Author: "Bob Tellefsen" <>
Date: Sat, 27 Mar 2004 10:37:04 -0800
Don The front end saver, or receiver feedline shorting, is a good idea if you are running power. However, with your receiving antenna so close to your transmitting vertical, you will have significant
/archives//html/Topband/2004-03/msg00290.html (7,024 bytes)

8. Re: Topband: 160 vertical advice needed (score: 1)
Author: "Bob Tellefsen" <>
Date: Sat, 5 Jun 2004 16:49:08 -0700
Dan essentially wastes the 14 ft of stinger above them. You would do better if you could run the top loading wires from the top of the stinger. Then you get into the question of how much down tilt of
/archives//html/Topband/2004-06/msg00007.html (8,222 bytes)

9. Re: Topband: Tophat? Does it have to be at the top? (score: 1)
Author: "Bob Tellefsen" <>
Date: Sun, 6 Jun 2004 14:03:28 -0700
Bill top loading wires would be ineffective. Top loading wires work best when at the top of the vertical section. Good luck and 73 Bob N6WG _______________________________________________ Topband mai
/archives//html/Topband/2004-06/msg00013.html (7,170 bytes)

10. Re: Topband: Tophat? Does it have to be at the top? (score: 1)
Author: "Bob Tellefsen" <>
Date: Thu, 10 Jun 2004 09:22:21 -0700
George My setup is similar to what you plan. I have a 50 ft vertical with sloping top loading wires. I modeled the antenna in EZNEC to find the best combination of top loading inductor and sloping wi
/archives//html/Topband/2004-06/msg00039.html (7,952 bytes)

11. Re: Topband: Mystery signal on 1805 (score: 1)
Author: "Bob Tellefsen" <>
Date: Mon, 28 Jun 2004 07:46:59 -0700
Don Do you have a portable shortwave receiver, perhaps like the Sony 2010 or others that are out there? Or maybe somewhere you could borrow one? Try walking around your neighborhood with it and see i
/archives//html/Topband/2004-06/msg00085.html (6,769 bytes)

12. Re: Topband: Q: Measuring Height? (score: 1)
Author: "Bob Tellefsen" <>
Date: Sat, 21 Aug 2004 08:39:48 -0700
Eric There was an article in one of the ARRL Antenna Compendiums that explored the halfsquare in various arrangements. If the horizontal wire isn't horizontal, as in running down a hill, the vertical
/archives//html/Topband/2004-08/msg00042.html (7,571 bytes)

13. Re: Topband: Adding radials, a question (score: 1)
Author: "Bob Tellefsen" <>
Date: Fri, 3 Sep 2004 08:29:44 -0700
Tom commented "There also was a claim radials only need to be about as long as the antenna. That's not quite true either. The shorter the antenna the more important it is to have a large number of lo
/archives//html/Topband/2004-09/msg00011.html (8,980 bytes)

14. Re: Topband: radial layout and pattern skew (score: 1)
Author: "Bob Tellefsen" <>
Date: Sun, 5 Sep 2004 14:34:38 -0700
Tony There must be more to it than that. My vertical has a nearly circular pattern, maybe 0.25 dB "front to back ratio". The vertical is at the center of one edge of a rectangular overhead counterpoi
/archives//html/Topband/2004-09/msg00021.html (7,028 bytes)

15. Re: Topband: Aluminum Push Up Mast (score: 1)
Author: "Bob Tellefsen" <>
Date: Wed, 8 Sep 2004 11:06:15 -0700
Dick The military mast sections that Pete mentioned are very good for a mast. The aluminum is amazingly tough. I had a 32 ft mast on my garage roof caught in a really big wind here. It tore out one s
/archives//html/Topband/2004-09/msg00054.html (7,632 bytes)

16. Re: Topband: Bi-directional Beverage for DXpedition (score: 1)
Author: "Bob Tellefsen" <>
Date: Wed, 13 Oct 2004 13:04:53 -0700
Ron No room here for a Bev, but from what I've read, you could use a pair of on-ground radials in place of the ground rod in your questionable ground. Just make the radials equally about 1/4 wave lon
/archives//html/Topband/2004-10/msg00063.html (7,100 bytes)

17. Re: Topband: W6SAI three wire inverted L (score: 1)
Author: "Bob Tellefsen" <>
Date: Mon, 25 Oct 2004 09:12:35 -0700
Peter This is my anecdotal info for you. Earlier this year I completed QRP WAS on 160m using a 50 ft top loaded vertical. When I built it, I arranged the length and loading to put the current max in
/archives//html/Topband/2004-10/msg00135.html (7,686 bytes)

18. Re: Topband: Vertical on the Beach? (score: 1)
Author: "Bob Tellefsen" <>
Date: Mon, 25 Oct 2004 09:16:56 -0700
Mike Check out the Force 12 antennas site. In one of the articles there they discuss making measurements of the effectiveness of verticals at different distances from the water. Good luck and 73 Bob
/archives//html/Topband/2004-10/msg00136.html (7,089 bytes)

19. Topband: He's baaaack (score: 1)
Author: "Bob Tellefsen" <>
Date: Mon, 15 Nov 2004 08:39:53 -0800
Just got my vertical back up in the air, with a jury rig matching arrangement. So crude, I won't even describe it :-) Called my first CQs last night and the first two responses were both from KH6, so
/archives//html/Topband/2004-11/msg00160.html (6,486 bytes)

20. Re: Topband: EZNEC Coaxial Transmission-Line Model (score: 1)
Author: "Bob Tellefsen" <>
Date: Fri, 19 Nov 2004 15:34:46 -0800
Hello Dick The transmission lines used in EZNEC are ideal, and do not radiate. elements, and thus would not show an interaction. Another approach might be to replace the TL with a wire of similar dim
/archives//html/Topband/2004-11/msg00198.html (7,098 bytes)

This search system is powered by Namazu