[Lowfer] An LF Inverted " L " Question - Going From Lf to MF

[Warren K2ORS]

Andy,

     Efficiency should not be a major consideration for receiving antennas.
    I recommend that you run some simulations - a good free program is
MMANA-GAL, available at:
http://hamsoft.ca/pages/mmana-gal.php
Lots of sample files to learn how it all works.
73 Warren



On 11/22/2014 5:52 PM, Andy - KU4XR via Lowfer wrote:
> I recently put up an LF receiving antenna using the loading coil from my lowFER antenna.
> It is 2.3 milliHenries, and I have a 180 foot run ( the long leg of my former windom ) connected
> to the top of the coil.. The coil is 16 feet AGL, and the long wire does a sagging run to its
> support... The antenna seems to be resonant at 203.500 KHz, determined by using the
> radios peak noise, and maximum S-meter reading.... Now.. I wanted to try the antenna
> on 630 meters, and ended up using .004 µF to peak it in the 630 meter band..
> Best " noise level " was obtained by using 2 - .002 µF caps parralled.. The " L " has a
> slight bit more band noise than the Tree-Tenna.. Question : What kind of loss in
> efficiency ( If I may call it that ) will adding the caps to bring it " UP " to MF, versus
> finding a way to short out the top mounted loading coil, and loading it from the shack
> when I want to use it for 630 meters...  I know how well the Tree-Tenna has performed
> on 630 meters, so I'm not giving up on it, just going to experiment some more..
>
> Thanks, and 73 :
>
> Andy - KU4XR
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