- 1. Topband: Base Insulators for Verticals (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Fri, 8 Sep 2006 18:39:54 -0700 (PDT)
- Bob, I have been checking out insulators for Rohn 25G. Here is what I have found: 1. Array Solutions - Delrin insulators. $1145 for a set of three. The $250 solution is no longer on the website. 2. K
- /archives//html/Topband/2006-09/msg00008.html (7,586 bytes)
- 2. Re: Topband: Base Insulators for Verticals (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Sun, 10 Sep 2006 06:09:07 -0700 (PDT)
- Using three separate insulators, one in each leg of a guyed tower, is about the WORST possible approach. It's very important the base be able to rock and slightly twist on some form of pivot without
- /archives//html/Topband/2006-09/msg00015.html (8,346 bytes)
- 3. Topband: Detuning Vertical (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Fri, 13 Oct 2006 03:53:24 -0700 (PDT)
- Hello Topband, I plan to put up a quarter-wave vertical for 160M. I would like to add an 80M vertical suspended by a catenary from the larger antenna. When I model this situation in EZNEC, driving th
- /archives//html/Topband/2006-10/msg00084.html (6,802 bytes)
- 4. Re: Topband: Norton preamp (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Sun, 21 Jan 2007 05:09:24 -0800 (PST)
- Ford, The intercept points are fictitious. They are calculated by taking a measurement in the linear region of the device under test. The measurement for third-order intercept (TOI) is made with two
- /archives//html/Topband/2007-01/msg00347.html (8,309 bytes)
- 5. Re: Topband: SDR-1000 IMD-DR, blocking dynamic range, IP3,and IP2 measurements (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Thu, 15 Feb 2007 20:52:48 -0800 (PST)
- Can someone point me to a block diagram of the SDR-1000? I want to understand what they have done. "When you're a Ham, you're a Ham all the way" - Apologies to Steven Sondhiem _______________________
- /archives//html/Topband/2007-02/msg00136.html (7,657 bytes)
- 6. Topband: Multiple Ground Systems (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Wed, 15 Aug 2007 13:51:21 -0700 (PDT)
- When laying out the radial fields for vertical antennas in an array, we are told to terminate the radials on a bus wire where the radials overlap. Why? What harm would come it this was not done? The
- /archives//html/Topband/2007-08/msg00024.html (7,119 bytes)
- 7. Re: Topband: Multiple Ground Systems (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Thu, 16 Aug 2007 14:32:49 -0700 (PDT)
- Thanks for the responses. I plan to have all the radials on the ground. I would be surprised to see smoke and flame from a radial field laying on the ground. It is true that bonding to a buss wire at
- /archives//html/Topband/2007-08/msg00032.html (7,659 bytes)
- 8. Re: Topband: Multiple Ground Systems (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Fri, 17 Aug 2007 07:22:24 -0700 (PDT)
- "I prefer to think of a radial system as an approximation of a solid sheet rather than individual conductors." "Why does the current need to be in any particular direction Rick? That buss, assuming y
- /archives//html/Topband/2007-08/msg00041.html (8,753 bytes)
- 9. Re: Topband: Multiple Ground Systems (score: 1)
- Author: Michael Rauh <mikerauh@yahoo.com>
- Date: Fri, 17 Aug 2007 10:47:38 -0700 (PDT)
- Just FYI: In the case of an 80M foursquare with 60 each 66 foot radials, the total radial wire required is 15,840 feet. Roughly 200 feet of buss wire and 11,764 feet of radial wire will be needed for
- /archives//html/Topband/2007-08/msg00043.html (7,474 bytes)
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