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References: [ +from:prforbes@bigpond.net.au: 34 ]

Total 34 documents matching your query.

21. Re: [TowerTalk] Topband: Shunt Fed Question (score: 1)
Author: " Peter Forbes" <prforbes@bigpond.net.au>
Date: Mon, 8 Dec 2008 14:04:35 +1100
Peter, The late John Lewis, VK3HW had a setup similar to what you describe. He had a steel electricity transmission tower with a full size 3 el 40mx yagi on top around 120 feet. Initially he tried ga
/archives//html/Towertalk/2008-12/msg00193.html (11,096 bytes)

22. Re: [TowerTalk] Hy-Gain AV-640 (score: 1)
Author: " Peter Forbes" <prforbes@bigpond.net.au>
Date: Mon, 29 Dec 2008 00:08:55 +1100
Bill, One suggestion - if he goes with this setup, make sure he runs the coaxial cable feed down the centre of the tower right to the ground. In that way, some of the residual radiation that occurs f
/archives//html/Towertalk/2008-12/msg00657.html (8,749 bytes)

23. Re: [TowerTalk] Create Rotor RC5A-2 (score: 1)
Author: " Peter Forbes" <prforbes@bigpond.net.au>
Date: Wed, 16 Dec 2009 07:14:53 +1100
Bill, Try the following link. It should be what you are looking for. Cheers Peter VK3QI http://f1chf.free.fr/fichiers/KR600/CREATE%20RC5.pdf -- Original Message -- From: "Bill Gaines AD8P" <ad8p@wcoi
/archives//html/Towertalk/2009-12/msg00145.html (7,985 bytes)

24. Re: [TowerTalk] Shunt Fed Tower - 160 Meter Gamma Match Question (score: 1)
Author: " Peter Forbes" <prforbes@bigpond.net.au>
Date: Thu, 18 Feb 2010 18:32:15 +1100
Chuck, Regardless of how long you make the shunt feed on the tower, you need to make both the series and parallel capacitors variable. The tuning of the antenna to the required frequency, is governed
/archives//html/Towertalk/2010-02/msg00456.html (12,322 bytes)

25. Re: [TowerTalk] 2 el yagi question (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Fri, 18 May 2012 11:17:24 +1000
Tom, That's a great "deep and meaningful" question. Assuming the dipole Is currently matched to the feedline then at least two things are going to happen: (1) Because of mutual coupling, the feedpoin
/archives//html/Towertalk/2012-05/msg00196.html (9,624 bytes)

26. Re: [TowerTalk] HF2V Elevated or On Ground (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Thu, 14 Nov 2013 13:11:51 +1100
Jim, Are you really measuring what DXers are really after when comparing vertical antennas at different heights above ground and ground mounted.? A DXer is really interested in the signal that leaves
/archives//html/Towertalk/2013-11/msg00265.html (11,053 bytes)

27. Re: [TowerTalk] K9YC vertical dipole test.... (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Fri, 15 Nov 2013 23:19:06 +1100
Hi Dan, Some great animations! Firstly, I should set the scene as to why I posed the original question. If you go back to the original question asked by James Setzler, K1SD on 14/11/13, James was tal
/archives//html/Towertalk/2013-11/msg00288.html (16,440 bytes)

28. Re: [TowerTalk] RG-149 (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Fri, 13 Dec 2013 10:58:38 +1100
Mike, Isn't RG-149 75 ohm cable? Cheers Peter VK3QI Hi: I have a chance to pickup some RG-149 brand new for almost free. The difference from the specs of RG-213 is that it is 52 Ohm, the rest of the
/archives//html/Towertalk/2013-12/msg00232.html (8,588 bytes)

29. Re: [TowerTalk] RG-149 (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Fri, 13 Dec 2013 11:13:59 +1100
Absolutely. The specs on it are: inner conductor 7 strands with diameter of 0.048 - this is similar to RG216 which is also 75 ohm. Mike, you need to check the dimensions with a micrometer - that will
/archives//html/Towertalk/2013-12/msg00234.html (11,098 bytes)

30. Re: [TowerTalk] RG-149 (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Fri, 13 Dec 2013 12:04:19 +1100
Yes Mike, I am not sure, but I seem to remember that this topic has come up before when a cheap source of such cable came on the surplus market. The only way to be sure is to measure the diameter of
/archives//html/Towertalk/2013-12/msg00236.html (9,467 bytes)

31. Re: [TowerTalk] RG-149 (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Fri, 13 Dec 2013 20:54:49 +1100
Hi Mike, It might be worth searching through the forum archives, as I am pretty sure that this topic has come up before. Mind you, it may have been on another forum. Once you know the diameter of the
/archives//html/Towertalk/2013-12/msg00250.html (10,160 bytes)

32. Re: [TowerTalk] TH7dx with 40 meters (score: 1)
Author: "Peter FORBES" <prforbes@bigpond.net.au>
Date: Wed, 5 Mar 2014 08:36:06 +1100
Glenn, Taking up Larry's suggestion even further, put one gamma match along the boom in the reflector direction for 40mx (usually right to the reflector) and another gamma match along the boom in the
/archives//html/Towertalk/2014-03/msg00003.html (9,569 bytes)

33. Re: [TowerTalk] RF and AC Cables In Buried PVC (score: 1)
Author: "Peter Forbes" <prforbes@bigpond.net.au>
Date: Mon, 18 Apr 2016 22:58:47 +1000
Greetings, It is also considered good practice to maintain at least a 300mm vertical separation between conduits in trenches where different voltages or services are concerned. This is common sense t
/archives//html/Towertalk/2016-04/msg00225.html (10,542 bytes)

34. Re: [TowerTalk] B & W TR Switch Model 380B (score: 1)
Author: "Peter Forbes" <prforbes@bigpond.net.au>
Date: Fri, 7 Oct 2016 14:31:28 +1100
http://bama.edebris.com/manuals/b&w/380/ Cheers Peter VK3QI Seeking a manual and/or schematic for this TR Switch by B & W Thank you joe k7mks _______________________________________________ _________
/archives//html/Towertalk/2016-10/msg00069.html (7,716 bytes)

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