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May 11th 06, 09:49 PM
posted to rec.radio.shortwave
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Fixed Loop On-a-Roof - Great for Monitoring that Hard-to-Get AM/MW Radio Station
Telamon wrote:
In article .com, "N9NEO" wrote: Does higher bands mean like 160m is higher than 75m or 3.885MHz is higher than 1.945MHz? Would your Idea be practical Telamon considering the reverse voltage capacitance of a varactor is limited to a small swing in PF? Maybe lots of diodes in parallel? Ack Ack, 12:59, back to work. Well a couple of things come into play. Local noise goes up, along with atmospheric, and loops tend to have greater local noise rejection over a voltage type. This is especially true for a shielded loop. There is no loop advantage in atmospheric noise save for lightening storm noise so it might make a better summer antenna. The lower in frequency you go the signals tend to be directionally phase stable and so with a loop receive pattern you can null signals. The higher in frequency you go the less advantage there is in a loop over a dipole but it will work just fine. I think paralleling diodes to get more capacitance than what one diode can provide will work. Can't think of a reason why it would not work. Thats just what I was wondering. Thanks Telamon! - Matt |
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