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Newsgroups: rec.radio.amateur.antenna
From: "Frank" <ve...@spamfree.telus.net>
Date: Fri, 25 Apr 2008 18:07:09 GMT
Local: Fri, Apr 25 2008 7:07 pm
Subject: Re: TAK-TENNA
news:xg7Qj.34259$B83.26627@newsfe3-gui.ntli.net...
> HI Just for curiosity I once ran a NEC simulation of the "TAK-tenna" on 7 MHz > Has anyone bought this small TAK-tenna HF Aerial > ? or know anyone that has? > Just wonder how they got on with it.? > Patrick GW1SXN at 30 ft above an average ground. The input impedance at resonance is 3.4 ohms, and radiation efficiency just under 9%. Using 50 ft of RG-213 the input impedance is 5.4 + j 12.4 ohms, and line loss 1.72 dB. Maximum gain, at a 30 degree take-off angle, shows -7.7 dbi. Nulls off each end are -14 dbi. With the above results an input power of 100 W radiates 6 W. I believe they 73, Frank You must Sign in before you can post messages.
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