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June 26th 10, 04:04 PM
posted to rec.radio.shortwave
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Matching transformer comparison?
m II wrote:
Anyone have a way of measuring the varying efficiencies of the following? Let's say 5 to 20 MHz frequency range. This would be the base number for comparison, assign it a one: a: Straight connection of a random long wire antenna The others... b: The same long wire connected through a television (75/300 ohm variety) c: Same antenna with a 9:1 ratio transformer I'm assuming everything else remaining the same. I'm interested in the variation, shown ratio wise, between the above. Are there any handy online calculators for this? mike http://amateur-radio-wiki.net/index....le=Calculators |
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