Hi Bob;
Base loading a mobile whip allows for taping the coil for a better
impedance match.
You certainly can use a loading coil in the center of a long wire or wire
HF antenna. It is quite common to do so. There used to be someone who
advertised center loading coils for HF antennas. I have not seen an ad
recently. Spi-Ro MFG, inc www.spiromfg.com offers shortened antennas
for some of the amateur bands. Also just the "shorteners". It is easy to
make your own. Get a couple of one foot pieces of 1-1/4 PVC pipe and some
varnish insulated # 14 wire and wind your own. Good luck.
73, Ed Richards K6UUZ
On Mon, 24 Jan 2005 12:38:02 -0800 "Bob Macklin" <[EMAIL PROTECTED]>
writes:
> I live in a senior apartment where I CANNOT have an outdoor antenna.
> So I
> have a wire around the wall at the base of the ceiling. It is
> currently 1/4W
> 40M antenna.
>
> I did buy the ARRL book on "Stealh Radio".
>
> HF mobile antennas use loading coils to make the antenna look
> longer. The
> better one us a coil in the center of the antenna.
>
> Some apartment antennas are nothing but a mobile whip with a base
> loading
> coil. Why BASE LOADING?
>
> But the real question is why not use a loading coil at the center of
> a long
> wire or dipole to make it look longer? The original Heath Antenna
> Tuner was
> just a loading coil("L" section) that allowed use of a SHORT wire
> with the
> small Heath transmitters. The DX-20 through DX-40.
>
> Bob Macklin
> K5MYJ/7
> Seattle, Wa.
>
> "REAL RADIOS GLOW IN THE DARK"
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