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JK, RC and CM,
I want to Thank Each of You for your replies to this question. Note: I am only talking about a SWL "Receive Only" Antenna here. I suspect that may be one reason that this Far-End Loaded AM/MW Coil may work is the fact that the RF Systems EMF Antenna is 'only' Sixteen Feet (16') Long; and the Two Inch to Three Inch (2"-3") Ferrite Rod at the End of the Wire Antenna Element does have some 'measurable effect' on improving the AM/MW Frequency Band performance of such a short Antenna. - Relative Size may be the Controlling Factor for this 'unique' small Antenna ? ? Would this 'trick' work with a Larger {Longer} SWL Antenna ? ? My more specific point of interest would be in whether using a Ferrite Rod with the Wire Antenna Element Wrapped as a AM/MW Coil around it would have some meaningful effect on a Horizontal Random Wire Antenna that was 75-100 Feet long. - For a Horizontal Random Wire Antenna ?WHY? 'place' the Ferrite Rod at the Far-End of the Wire Antenna Element ? - Why not 'place' the Ferrite Rod near the Feed-Point-End ? - Why not 'place' the Ferrite Rod near the Middle ? - Why not 'place' the Ferrite Rod near the slightly Off-Center 38%/62% like a Windom ? What about a "Low Noise' Inverted "L" Antenna that is 45-100 Feet long. For an Inverted "L" Antenna ?WHY? not 'place' the Ferrite Rod at the "Top" of the Vertical Leg where the Antenna Wire Element transitions from Vertical to Horizontal ? - 15 Feet Up Ferrite Rod AM/MW Ferrite Coil and 30 Feet Out. - 20 Feet Up Ferrite Rod AM/MW Ferrite Coil and 40 Feet Out. - 25 Feet Up Ferrite Rod AM/MW Ferrite Coil and 50 Feet Out. - 33 Feet Up Ferrite Rod AM/MW Ferrite Coil and 67 Feet Out. Or again here would having the Ferrite Rod and Coil at the Far-End work some 'magic' trick ? and Why ? in search of some ideas and answers ~ RHF .. .. = = = (RHF) wrote in message = = = . com... FO&A, Here is my Question: Is there any sense in putting a Ferrite Rod at the Far-End of a Random Wire Antenna with the Wire from the End of the Wire Antenna Element 'wrapped' around it in a "Tuned Coil" to improve the AM/MW Band Reception ? * Any 'theory' behind why this Idea might Work ? * Does this Idea actually Work ? * Or is this Idea just so much Antenna 'hype' and Sales Marketing I am Asking these Questions is because of what I have read about the RF Systems "EMF" Electro-Magnetic-Field Passive Wire Antenna http://www.universal-radio.com/catalog/sw_ant/0743.html In "John Wagner's Shortwave Tips & Tricks" he writes: http://www.dxing.com/tips.htm "The EMF antenna has two 35mm film canister looking objects connected to it. The canister on the Far-End is actually an excellent "Tuned Ferrite Rod" designed for MW (Medium Wave) and really helps any receiver without a built in MW Antenna Rod. Canister two (in middle) is a Balun that helps SW reception very much." i want to know ~ RHF . . |
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