"Telamon" wrote in message
...
In article ,
"HankG" no_one@invalid wrote:

My primary antenna is a 33 ft folded dipole made from 300 ohm twin
lead and is mounted in my roof. It is coupled by a 300 to 75 ohm tv
transformer to 75 ohm coax. The antenna is described in message 2471
of the Yahoo Rx-320 group and works fairly well.

Recently, I acquired 3 rolls (40 ft each) of indoor 300 ohm coax, a
closeout at Radio Shack. On checking my house diagram (drawing), I
determined that I could run another antenna which could run about 100
feet if I include my garage. This is measured from left rear roof,
through a wall, diagonally to front right garage (plus a 20 ft wrap
on each end).

I'd welcome any suggestions from the group on an antenna
configuration such as dipole, folded dipole, twinlead converted to
long wire (doubled back on itself), etc. This would be for SW
reception, but MW would be a plus. Thanks.

You could take two of those 40 foot pieces and make a 80 foot folded
dipole antenna.

Yes. The resonant frequency of an (un)folded dipole of 80 ft would be about
5.85 Mhz. My current antenna (resonant at 14.18 Mhz) uses a twinlead stub
which supposedly confers a broader bandwidth. I have used it to monitor 160
meters and works fairly well in the single digits. Is there a formula for
calculating stub length to give this 80 footer greater bandwidth?

Some of the Radio Shack 300 / 75 ohm transformers are not much good
below 10MHz.

Interestingly, I acquired the transformers (2 on a card) at the local dollar
store. Works fine.


HankG