On Fri, 19 Sep 2003 12:05:54 -0700, DaveC
wrote:

My brother is a serious SWL'er with a recent model of Drake SW receiver. He
listens exclusively to 30MHz.

He has asked me (the family electronics geek) what his options are for an
antenna on his balcony. (The management doesn't allow anything on the roof of
the building.) The balcony is a roofed 6 ft x 8 ft affair.

Is it possible to put a loop antenna, coiled inside the balcony roof, each
coil being supported, possibly, by a custom plexiglas support in each corner?


I'm open to other possibilties, but with the limited space, I quickly run out
of ideas.

Take a 2"X2" 8 foot long
Wrap a Dipole around it
and feed it with a TV type 300 Ohm to 75 ohm
Matching Transformer.
You could even wrap a Multiple Dipole.
I build one with 2 Spools of Rad shack
clear speaker Wire. 75 dual strand, that
you unzip apart.
cutting one at 50 and 25 feet, and the Other
75 foot as the Base Winding
I used guike qlue to hold it in place
and made a pedastal for it,
so I could take it Inside when I needed to
It worked great, and took it Camping as Well
I know about the center-fed masts, such as
http://www.radio-ware.com/products/asb3.htm
but I'd like to help him with an inexpensive DIY solution, if possible.

Any suggestions would be greatly appreciated.

Thanks,
--
Dave C

On Sat, 27 Sep 2003 9:58:19 -0700, DaveC
wrote:

You unzip 2 spools of 75 foot clear speaker Wire
(it has 2 Wires zipped together)
and start wrapping from the Center of the 2 X2
Like this
_________________________________________
^
Here
One strand goes to one side of the Matching transformer
the Other Stand to the other to the 300 Ohm Side
Multiple Windings is too Complicated for you at this time
as you are New to all this.
But in Time you will learn one can wind Parallel Windings on a
Diploe that will still be 300 Ohms
if This was stretched out instead of Wound it would be
75 Ohms and no match would be needed.


On Fri, 26 Sep 2003 11:38:02 -0700, Sam Taylor wrote
(in message ):

Take a 2"X2" 8 foot long
Wrap a Dipole around it
and feed it with a TV type 300 Ohm to 75 ohm
Matching Transformer.

You could even wrap a Multiple Dipole.
I build one with 2 Spools of Rad shack
clear speaker Wire. 75 dual strand, that
you unzip apart.

cutting one at 50 and 25 feet, and the Other
75 foot as the Base Winding
I used guike qlue to hold it in place
and made a pedastal for it,
so I could take it Inside when I needed to
It worked great, and took it Camping as Well

I don't quite understand how you made this.
2 dipoles? One 50 and 25 feet (I don't understand how these two lengths are
one antenna...) The other antenna at 75 feet (that makes 3 lengths, not 2...)

Wind the 75 foot antenna first around the pole. What do you attach it to? The
transformer (300 ohm side)?

The 50 and 25 lengths are attached to what? How?

Thanks,
--
Dave C