Search String: Display: Description: Sort:

Results:

References: [ +from:tom@telemetry.demon.co.uk: 42 ]

Total 42 documents matching your query.

1. Topband: Loading coil relay arcing (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Thu, 10 Nov 2005 17:06:05 -0000
Folks The answer to this problem is to put the loading coil at the top of the vertical, not the bottom, and you won't need to do any relay switching at all! The coil looks like an RF choke on 80m and
/archives//html/Topband/2005-11/msg00087.html (6,918 bytes)

2. Topband: Aluminium antenna wire (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Mon, 16 Jan 2006 18:48:37 -0000
Does anyone have any experience of using alumin(i)um wire for antennas? My 160m antenna is supported by tall trees which tend to move in opposite directions with the wind and the antenna life expecta
/archives//html/Topband/2006-01/msg00237.html (6,758 bytes)

3. Topband: Aluminium Antenna Wire (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 17 Jan 2006 10:15:59 -0000
Thanks for all the comments, some for and some against Al wire for antennas. I think the 'split-nut' or 'split-bolt' connector is what we commonly call a 'chocolate block' because that's what it look
/archives//html/Topband/2006-01/msg00243.html (7,302 bytes)

4. Topband: Al wire (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Mon, 23 Jan 2006 13:34:41 -0000
Just to repeat my thanks to all those who posted comments on the pros and cons of using aluminium wire for antennas. The advantages seem to be outweighed by the disadvantages, so I'm sticking to copp
/archives//html/Topband/2006-01/msg00322.html (6,465 bytes)

5. Topband: Inverted-L (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Fri, 3 Mar 2006 11:23:56 -0000
The advantage with making it a little longer than 1/4 wl is that it tunes with a simple series C. What's your recommended way of matching a true 1/4 wl to 50 ohm coax? 73 Tom G3OLB _________________
/archives//html/Topband/2006-03/msg00029.html (7,056 bytes)

6. Topband: Inverted L matching (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 5 Mar 2006 18:39:35 -0000
Hello Top-banders Thanks to all those who responded on the subject of matching 160 metre inverted-L antennas. As expected, everyone does it differently! KU8E uses a 1.78:1 UNUN and has problems N2CU
/archives//html/Topband/2006-03/msg00035.html (7,522 bytes)

7. Re: Topband: Thunderstorm (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Wed, 29 Mar 2006 13:40:42 +0100
Well I was walking my dog in some light rain under HV power lines a while ago and was getting sparks and cracks from the spokes to the stem of my umbrella! Quite frightening! Tom G3OLB ______________
/archives//html/Topband/2006-03/msg00200.html (7,274 bytes)

8. Topband: Broadcast Radio?? (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Mon, 25 Sep 2006 07:38:44 +0100
sounds Bob Check the connections in your antenna. You have a rectifying joint somewhere which is acting like a mixer to a couple of broadcast stations and producing a mixing product on topband. 73, T
/archives//html/Topband/2006-09/msg00107.html (6,706 bytes)

9. Topband: Stew Perry Contest (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 31 Dec 2006 12:21:22 -0000
I think conditions last night would have tried even the legendary patience of the man from Winthrop! I just about managed 5 NA stations from 2200 - 2300z and 3 more from 0400 - 0415z. All NA signals
/archives//html/Topband/2006-12/msg00367.html (6,672 bytes)

10. Topband: non-reciprocity (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 11 Nov 2007 23:55:33 -0000
If station A has a transmitting antenna with completely different directional characteristics to that of station B, then it is surely conceivable that A to B takes a different path than B to A? On to
/archives//html/Topband/2007-11/msg00067.html (6,803 bytes)

11. Topband: Antennas in trees (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Wed, 14 Nov 2007 18:50:23 -0000
Andreas Trees are not ideal antenna supports because it is not easy keeping the wire away from branches. This autumn my inverted 'L' gradually moved it's resonant frequency up the band by about 20 KH
/archives//html/Topband/2007-11/msg00102.html (7,597 bytes)

12. Re: Topband: Antennas in trees (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Thu, 15 Nov 2007 08:41:54 -0000
Tom My antenna was actually touching the branches - I had pulled it in close to get a maximum height of about 83'. I have only pulled it away by a few feet to miss the branches but my measurements sh
/archives//html/Topband/2007-11/msg00117.html (8,174 bytes)

13. Topband: Enhanced conditions last week (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 1 Apr 2008 20:27:45 +0100
Brian VE3MGY asked what 160 condx. were like last week in Europe: Thursday 27th yielded FK8CP at 1905z, 4S7NE at 1946z and VK3ZL at 2009z, all at good strengths, VK3AMZ heard peaking 579. Friday 28th
/archives//html/Topband/2008-04/msg00000.html (6,449 bytes)

14. Topband: 2nd harmonic suppression (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 15 Apr 2008 17:42:28 +0100
I had a similar problem to ZS1REC's with a high 2nd harmonic output from my amp and a report on 80m from Norway while on topband! Like many on 160, I use an inverted 'L' antenna which was matched wit
/archives//html/Topband/2008-04/msg00056.html (6,841 bytes)

15. Topband: Nice conditions (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Fri, 21 Nov 2008 03:29:09 -0800
That's how I like to hear topband! Sunrise conditions have been excellent for the last few days despite some slow, deep QSB. Yesterday morning the band was very quiet but yielded K9FD/KH6. This morni
/archives//html/Topband/2008-11/msg00142.html (7,143 bytes)

16. Topband: VK9GMW Antenna (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Mon, 27 Apr 2009 07:22:19 +0100
George (AA7JV) - Interesting description of your antenna - it would also be usful to have info on your auto-ATU. 73 Tom G3OLB _______________________________________________ Topband mailing list Topb
/archives//html/Topband/2009-04/msg00083.html (6,880 bytes)

17. Topband: 1830 carrier (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 19 May 2009 22:27:17 +0100
In East Devon the 1830 carrier has been audible all day for the last few days, S5-6 at mid-day and S9 + 10 to 20dB after dark. Tom G3OLB _______________________________________________ Topband mailin
/archives//html/Topband/2009-05/msg00081.html (7,138 bytes)

18. Topband: Topband loaded dipole (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Fri, 24 Jul 2009 07:38:56 +0100
Ian, if you want the best DX performance, do what the others say and use a Marconi Tee. But if you want to optimise your high angle inter-G signal, then use an inductively loaded dipole arrangement o
/archives//html/Topband/2009-07/msg00107.html (7,340 bytes)

19. Topband: Mica capacitors for antenna matching. (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 26 Jul 2009 20:22:52 +0100
There's been a thread on here about using silvered mica capacitors for antenna matching networks. I have had no success at all using these as they don't appear to handle any significant amount of cur
/archives//html/Topband/2009-07/msg00134.html (7,757 bytes)

20. Topband: Low activity (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 02 Mar 2010 06:17:38 -0800
Sunrise topband conditions have been good this week but activity very low. This morning between 0700 and 0730, excellent signals from ZL1AZE and W6OAR but no other callers. Listening for an hour, I o
/archives//html/Topband/2010-03/msg00003.html (6,543 bytes)

Current List: 1 - 20
Page: [1] [2] [3]
This search system is powered by Namazu