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LF: Radial / Counterpoise systems

To: "rsgb lf group" <[email protected]>
Subject: LF: Radial / Counterpoise systems
From: "LAWRENCE MAYHEAD" <[email protected]>
Date: Fri, 19 Nov 1999 18:29:41 -0000
Reply-to: [email protected]
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Re. the ongoing discussion about radials etc. I once saw a 500 Khz installation which used a marconi "T" ant. with 3 top wires.Below was a counterpoise earth system which consisted of about 10 spaced wires equal in length to the top wires.these wires were about 10 feet above ground and were linked together.I suppose you could best call this system a " GROUND SCREEN " Obviously if the ant return current can be made to flow through this screen then ground losses will be reduced.I guess we could learn a lot from these 500Khz installations,but where is the information? I would especially like details of the tuning system,since to be effective the whole thing must be resonant.L.A.Moxon gives details of multiple short radials in his book "H.F.Antennas for all occasions" so we do at least have some information on this part of the system. 73 Laurie G3AQC.
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