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21. Topband: 'Spud Gun' (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Wed, 17 Mar 2010 19:52:50 -0800
Can anyone give me more information on Gary's 'Spud Gun'? I have been using an angler's catapult, with monofilament line, for years to put my topband wire halyards over trees, but the limit is about
/archives//html/Topband/2010-03/msg00089.html (7,126 bytes)

22. Topband: 'Spud Guns' (score: 1)
Author: tom@telemetry.demon.co.uk
Date: Sat, 20 Mar 2010 13:22:02 +0000
Thanks to Gary KA1J, Bob G3REP, Bob W0BR and all the others who sent me a wealth of information on projectile launch devices for antenna erection. I'm not sure how available sprinkler trigger valves
/archives//html/Topband/2010-03/msg00115.html (6,572 bytes)

23. Topband: Inverted L dimensions (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Fri, 24 Sep 2010 17:20:07 +0100
<(2) I could still benefit from resonating each "L" with base-mounted variable capacitors (albeit with much SMALLER "C").> Eddy, you will need LARGER value capacitors to resonate your quarter waves +
/archives//html/Topband/2010-09/msg00078.html (7,870 bytes)

24. Topband: Preferred Topband transceiver (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Mon, 06 Dec 2010 06:18:53 -0800
Gerry, This morning was an example of the great advantage of the K3's phase-locked diversity receiver. During my contact with ZL3IX, Greg was peaking 569 and dropping to 449 in rapid QSB on both my v
/archives//html/Topband/2010-12/msg00025.html (7,933 bytes)

25. Topband: First attempt at beverage antenna, not working as expected (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Mon, 17 Jan 2011 08:48:37 -0800
Just a few comments to Mark WD4ELG: I too have a single short Beverage, about 350' over clay soil and sloping up a hill to the west, fed with about a quarter mile of RG58. It's really too short for t
/archives//html/Topband/2011-01/msg00086.html (9,172 bytes)

26. Topband: 160 metre vertical with 'top loading' (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 24 Apr 2011 20:01:59 +0100
On the eternally recurring argument about current into and out of a loading coil, here is the way my simple mind has always understood it: W8JI is correct in that the current into a perfect inductor
/archives//html/Topband/2011-04/msg00115.html (7,642 bytes)

27. Topband: 160 metre vertical with 'top loading' (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 26 Apr 2011 09:49:42 +0100
I take your point Yuri, but my simplistic way of looking at the current decreasing along a straight quarter wave of wire is due to the current flow through it's distributed capacitance to ground. May
/archives//html/Topband/2011-04/msg00127.html (9,156 bytes)

28. Topband: 160 Conditions (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Wed, 28 Dec 2011 03:28:28 -0800
Who says top-band conditions are in the doldrums? 160 was really singing this morning and signals from the mid-west and west were like I've never heard them. In under an hour at 0500Z, 30 US stations
/archives//html/Topband/2011-12/msg00561.html (6,753 bytes)

29. Topband: RSGB 1st 1.8 MHz Contest (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 12 Feb 2012 02:17:36 -0800
Nice to work some old friends last night although G activity seemed low and the last couple of hours were a little painful. 160 QSOs with at least one dupe which was my logging error (sorry Terry!) N
/archives//html/Topband/2012-02/msg00180.html (7,908 bytes)

30. Topband: Fw: RSGB 1st 1.8 MHz Contest (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 12 Feb 2012 03:11:19 -0800
Tree - delete this please - sent it to the wrong reflector! 73, Tom G3OLB Nice to work some old friends last night although G activity seemed low and the last couple of hours were a little painful. 1
/archives//html/Topband/2012-02/msg00182.html (7,737 bytes)

31. Topband: TB Season (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Fri, 16 Mar 2012 11:46:11 -0800
Well something just ate my control cable to my remote antenna switch box! Pesky rabbits I think. 73 Tom G3OLB _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
/archives//html/Topband/2012-03/msg00114.html (7,731 bytes)

32. Topband: DSL knocks out when on topband (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 17 Jul 2012 16:45:12 +0100
Herb, On the recommendation of John G3PQA, I recently changed my router from a D-Link unit to an ADDON NWAR-3670 which appears to have much better RFI immunity. I'm not getting any dropouts at all no
/archives//html/Topband/2012-07/msg00223.html (8,574 bytes)

33. Topband: Antenna analysers in close proximity to BC station. (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Fri, 02 Nov 2012 17:21:43 -0500
A ham friend asked me to design a matching network for his 160 metre end fed quarter wave, so I asked him to provide an impedance reading using his MFJ-259B. I would then use the Berkley site (http:/
/archives//html/Topband/2012-11/msg00006.html (8,646 bytes)

34. Topband: Antenna analysers in close proximity to BC station (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Sun, 04 Nov 2012 12:46:57 -0500
That's an interesting idea Red and worth a try. 73 Tom G3OLB 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,
/archives//html/Topband/2012-11/msg00052.html (7,125 bytes)

35. Topband: Antenna analysers in close proximity to BC station (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Mon, 05 Nov 2012 02:54:50 -0500
Thinking again about this, we have missed out a stage. After measuring the tuner output impedance, we need to make a temporary L network which, when terminated with 50 ohms, looks like the antenna. N
/archives//html/Topband/2012-11/msg00057.html (7,904 bytes)

36. Topband: Broadband dipoles (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 26 Feb 2013 09:59:12 -0500
It's the reference to termination resistors in the SPX data sheet that bothers me. Tom G3OLB _________________ Topband Reflector
/archives//html/Topband/2013-02/msg00174.html (7,101 bytes)

37. Re: Topband: Broadband dipoles (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 26 Feb 2013 18:18:33 -0500
Yes Tom, I was going to mention the polyprop guys as well. Worst stuff you can use. Well remember a 60' mast bent across my neighbours roof as a result of using polyprop guys which had degraded in UV
/archives//html/Topband/2013-02/msg00180.html (8,506 bytes)

38. Topband: Fw: Inv-L joy (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Tue, 23 Jul 2013 18:31:54 +0100
What bothers me about putting the actual antenna wire across the tree is that it is then very close and in fact touching the tree. I'm not sure what loss the tree would cause by having it so close. M
/archives//html/Topband/2013-07/msg00039.html (7,443 bytes)

39. Topband: 'Hairpin' matching (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Thu, 19 Sep 2013 19:52:33 +0100
Just to add a comment on this thread: I do not use an inductor to match my inverted 'L', just a capacitor from coax centre/bottom of wire to the radial point. Further I do not use big wide space 'toa
/archives//html/Topband/2013-09/msg00275.html (7,680 bytes)

40. Topband: 'Hairpin' matching (score: 1)
Author: "Tom Boucher" <tom@telemetry.demon.co.uk>
Date: Fri, 20 Sep 2013 07:25:18 +0100
The excellent web site for calculating matching network values should have been: http://home.sandiego.edu/~ekim/e194rfs01/jwmatcher/matcher2.html not the one I posted yesterday. 73, Tom G3OLB _______
/archives//html/Topband/2013-09/msg00277.html (6,697 bytes)

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