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On Apr 21, 8:04 am, "Dale Parfitt" wrote:
- - " - - The ICE 180 Matching Transformer 'acts' as the Collection - - Point for each of the Signals coming from the Four 'individual' - - Wire Antenna Elements. - - In this instance the Four Taps on the Antenna Side of the - - ICE 180 Matching Transformer 'act' as a Summing Network. - - The Output of which is fed {transferred} to the Coax Cable - - Side of the ICE 180 Matching Transformer. - You'd have to prove it to me. My only Practical Proof is what I hear with my own two ears. - Simply connecting the wires to different taps on a - transformer does not sum as it would in a well designed - hybrid that has excellent port-port isolation. Not claiming that it does a good or great job of Summing Up the Products of the Four Individual Antennas. May in-fact do a poor job of doing that. -but- The Practical End Result -may-be- Better that the Result from any of the Four by itself. - More wire in the air does not necessarily relate to - more capture area and more capture area In this instance the Four Inverted "L" Antennas all colocated in the same Vertical Plane form and Array {Curtain} and "DO" have a Greater Signal Capture Area then any of the Four by itself. - may or may not be a good thing. Yes - Collectively the Composite Signal from the Four -may-be- Better-or-Worse then any of the Four by itself. Like many things : Until an Individual try it in their own unique location with their own unique Radio Shack they will not know the outcome good or bad or simply ho-hum. - At MW and HF being able to reduce noise - whether it - be manmade or atmospheric is worth a lot more than - simply more signal and noise. Yes - That is True. - Better S/N only comes by use of an antenna that has - directional characteristics that can reduce or null noise - arriving from unwanted directions- thus the popularity of - beverages, EWE's, K9AY's, flags, pennants, loops, Yagis - with clean side and rear lobe patterns. Note that all but - the Yagis are VERY inefficient antennas- BUT they are - directional and thus yield greatly improved S/N. Compare - a well built rotatable flag+preamp to your 2000' longwire - and see for yourself. - Dale - Dale - All that and Your Technical Expertise is all way beyond me : I try to stick to Keeping It Simple And Practical. ~ RHF Dale - I do try to improve Signal-to-Noise from my Practical {personal} Reference Point of a simple and basic Long-Wire Antenna like one of the RadioShack Shortwave Antenna Kits http://www.markdownalley.com/showitem.cfm?itemid=1397 I generally do the Following : * Remote Antenna Element {away from the House were practical and possible} * Remotely Located Ground Rod {away from the House were practical and possible} * Matching Transformer Mounted on the Ground Rod * Coax Cable feed-in-line from the Matching Transformer to the Radio / Receiver Dale - I call this a Far-End-Fed [FEF] Inverted "L" Antenna using a Matching Transformer with a Remotely Located Ground Rod and Coax Cable feed-in-line. Flipping the Inverted "L" Antenna 'Back-to-Front' = Better Performance http://groups.google.com/group/rec.r...79890656d94af1 WHY - The Far-End-Fed Shortwave Listener's (SWLs) Inverted "L" Antenna http://groups.google.com/group/rec.r...cfc6b9cb2447c0 The "Correct Way" to Install a Longwire Antenna and Balun -by- Wellbrook - Using the Far-End Feed-Point Concept http://groups.google.com/group/rec.r...5cc467b35a70d5 |
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