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References: [ +from:clive@gm3poi.prestel.co.uk: 41 ]

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21. [TowerTalk] Re: Guy wire interaction (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Sat, 10 Apr 1999 08:08:13 +0100; "However, besides rescaling the wire lengths, a frequency scale will also change the diameters. While this may have a small effect on the model behaviour, I'd reset the wire diameter after the rescal; /archives//html/Towertalk/1999-04/msg00218.html (7,660 bytes)
22. [TowerTalk] 15m/10m Yagi (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Sun, 11 Apr 1999 13:57:48 +0100; Has anyone got a design for an optimised interlaced 15/10m yagi of about 4/5el on each band, all i need is the .875" element lengths and spacing. Preferably separate feeders,rather than open sleeve.; /archives//html/Towertalk/1999-04/msg00249.html (6,958 bytes)
23. [TowerTalk] Brown Lewis Epstein (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Mon, 19 Apr 1999 22:39:06 +0100; I would like to get hold of a copy of the 1937 Ground System Efficiency Paper. Does any one know whether its been reproduced on the Web anywhere. 73 Clive GM3POI -- FAQ on WWW: http://www.contesting.; /archives//html/Towertalk/1999-04/msg00521.html (6,998 bytes)
24. [TowerTalk] Prop Pitch Brushes (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Wed, 21 Apr 1999 08:12:54 +0100; Stewart, First check the length of the existing one. New ones are 11/16" long. 73 Clive GM3POI --Original Message-- From: S Cooper <coopersg@odl.co.uk> To: 'towertalk@contesting.com' <towertalk@conte; /archives//html/Towertalk/1999-04/msg00560.html (8,039 bytes)
25. [TowerTalk] Ground Radial Fields (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Sat, 27 Mar 1999 11:42:26 -0000; HI, Does anyone have any field strength data, re the lowering of radiation angle in a given direction if extra radials are concentrated in that direction. ie taken to the extreme 60 radials covering; /archives//html/Towertalk/1999-03/msg00501.html (7,811 bytes)
26. [TowerTalk] Ground Radial Fields (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Tue, 30 Mar 1999 13:36:23 +0100; Hi Tom, Thanks for the I/P yes N6RK has interesting info on his web page about the work he did measuring radial field differences all very interesting stuff. It can be found at <http://www.karlquist.; /archives//html/Towertalk/1999-03/msg00552.html (9,532 bytes)
27. [TowerTalk] Yagi Separation (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Mon, 15 Feb 1999 14:43:15 -0000; Hi, I'm currently trying to evaluate the effect of various spacings on a 15m 4el and a 10m 4el. I wonder what others have found.? I have modelled both with each antenna being the upper one to see if; /archives//html/Towertalk/1999-02/msg00336.html (7,749 bytes)
28. [TowerTalk] Yagi Separation (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Wed, 17 Feb 1999 00:15:10 -0000; Hi Gary and Bill W4AN, Thanks for your comments and to everybody else as well. According to the modelling so far the F/B and SWR are not badly affected by the Yagi interaction, and the gain drop is n; /archives//html/Towertalk/1999-02/msg00373.html (10,714 bytes)
29. [TowerTalk] Yagi Separation (score: 1): Author: clive@gm3poi.prestel.co.uk (Clive Penna); Date: Wed, 17 Feb 1999 00:16:04 +0000; -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Sea; /archives//html/Towertalk/1999-02/msg00374.html (22,787 bytes)
30. [TowerTalk] Everyone who e-mailed me de GM3POI (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Wed, 17 Feb 1999 13:08:21 -0000; Hi Thanks to the many who mailed me re that virus that originally came to me from a posting to this Ref'. I have cleared it from my system, Virus Scan here did not pick it up. Now back to Yagis!!. 73; /archives//html/Towertalk/1999-02/msg00385.html (7,111 bytes)
31. [TowerTalk] Rebuilding 204BA (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Wed, 17 Feb 1999 23:53:24 -0000; Hi James, I have redone yagis after 3 years and was surprised by the amount of oxidisation that had taken place even though Noalox had been used, its dead easy to drill out the old rivets with a dril; /archives//html/Towertalk/1999-02/msg00395.html (9,242 bytes)
32. [TowerTalk] 15-4CD (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Fri, 26 Feb 1999 14:42:47 -0000; Has anybody done the failure wind speed calc's for the 15-4CD boom, my guess as standard it is around 100mph which is not very good. regards Clive GM3POI -- FAQ on WWW: http://www.contesting.com/towe; /archives//html/Towertalk/1999-02/msg00545.html (6,837 bytes)
33. [TowerTalk] C4 Delivered on Kauai (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Wed, 6 Jan 1999 10:24:42 -0000; Hi Jim, I have painted a number of antennas. You need to do the following first assemble it before the painting. Obtain from a specialist paint supplier an aluminium type etch primer, that stuff drie; /archives//html/Towertalk/1999-01/msg00109.html (8,900 bytes)
34. [TowerTalk] Ox-gard (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Fri, 18 Dec 1998 14:52:38 -0000; Hi Gerald, I disagree with your theory, No-AL-OX and the like is not to exclude air. It is made using Zinc particles, these cut into the aluminium oxide on the tubing surfaces and give the conductivi; /archives//html/Towertalk/1998-12/msg00269.html (9,579 bytes)
35. [TowerTalk] Water in matching sections (score: 1): Author: Clive Penna" <clive@gm3poi.prestel.co.uk (Clive Penna); Date: Fri, 18 Dec 1998 15:10:52 -0000; Hi , You could also add a few bags of Silica Gel Desiccant in the box to absorb any unwanted moisture. 73 Clive GM3POI --Original Message-- From: alsopb <alsopb@gloryroad.net> To: Towertalk@contestin; /archives//html/Towertalk/1998-12/msg00271.html (9,509 bytes)
36. [TowerTalk] KLM 40M4 -v- M2 40M4L (score: 1): Author: clive@gm3poi.prestel.co.uk (clive penna); Date: Fri, 3 Jul 1998 23:34:18 +0100; Hi Al, No the M2 is definitely not better. I had a 4el 40m manufactured to a 125mph spec. The linear loading fell apart several times at wind speeds of around 65mph. I rebuilt it and tried several ti; /archives//html/Towertalk/1998-07/msg00139.html (8,329 bytes)
37. [TowerTalk] Four Square but different (score: 1): Author: clive@gm3poi.prestel.co.uk (Clive Penna); Date: Thu, 30 Jul 1998 08:54:40 +0100; Hi , I want to make a four square here on 40m as a backup antenna. For other reasons i want to use an over length vertical as one of the four. It will be 40ft high ground mounted. If you assume the Z; /archives//html/Towertalk/1998-07/msg00959.html (7,294 bytes)
38. [TowerTalk] Oxidized R7-what to do? (score: 1): Author: clive@gm3poi.prestel.co.uk (clive penna); Date: Sun, 19 Apr 1998 08:31:18 +0100; Hello Jon, Well my location here is similar in that the sea is within 500 yards from here. My answer to corrosion has been to assemble the antenna using an Anti-Oxidant then paint the whole antenna.; /archives//html/Towertalk/1998-04/msg00509.html (10,887 bytes)
39. [TowerTalk] Re: Penetrox vs WD40/graphite (score: 1): Author: clive@gm3poi.prestel.co.uk (clive penna); Date: Fri, 24 Apr 1998 23:15:47 +0100; I find the best method is to use steel wool and the No-Al-Ox or whatever and rub it into the surface of the aluminum. That way you are cutting through Aluminum Oxide with both the wool and the Zinc p; /archives//html/Towertalk/1998-04/msg00678.html (8,888 bytes)
40. [TowerTalk] Prop Pitch Motors (score: 1): Author: clive@gm3poi.prestel.co.uk (clive penna); Date: Sun, 26 Apr 1998 18:57:26 +0100; Does any one know what the casing metal is on a prop pitch motor, also i need a set of brushes any help appreciated. Clive GM3POI -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submission; /archives//html/Towertalk/1998-04/msg00751.html (7,070 bytes)

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