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#7
April 7th 11, 10:40 PM
posted to rec.radio.amateur.antenna
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40/15M dipole question
In article , Dave Platt wrote: If the antenna is close to 50 ohms resistive in the 40-meter band, and is around 85.26 - J 186.3 in the 15-meter band, then you could consider adding a series coil at the antenna feedpoint. If I'm doing the numbers right, an inductance of 1.5 mH at the feedpoint would cancel out the 186 ohm capacitive reactance almost exactly, leaving you with an 85-ohm resistive impedance or an SWR of around 1.7:1, which should be quite easy to drive. .... for which, please read "1.5 uH" - micro rather than milli :-( Similar errors elsewhere in my posting. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
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