View Single Post
  #17   Report Post  
Old November 15th 04, 02:44 AM
Roy Lewallen
 
Posts: n/a
Default

You don't need a long wire for listening. One a fairly small fraction of
a wavelength is probably adequate. If the noise level drops when you
disconnect the antenna, it's long enough, and making it longer or adding
gadgets to it won't help a bit.

A number of the people posting on this thread are thinking of the
requirements for an efficient antenna. Efficiency is important when
transmitting, but of almost no importance for receiving. The antenna
just has to be efficient enough to deliver more atmospheric noise than
you have internal receiver noise. Any more makes no improvement.

Roy Lewallen, W7EL

RHF wrote:

A 100 Foot long Inverted "L" Antenna is not a Long Wire for the
AM/MW Broadcast Band with coverage for 530 kHz to 1700 kHz

* One Wave Length for 530 kHz is 1896 Feet; and 100 Feet at
530 kHz would only be 0.053 WL.

* One Wave Length for 1700 kHz is 591 Feet; and 100 Feet at
1700 kHz would be 0.169 WL.

Like most people I do not have 600 to 1900 feet of space to
string up a true "Long Wire" {One Wave Length} Antenna for
the AM/MW Broadcast Band. So this is why I am 'questioning'
the use of Ferrite Rod Antenna with a Coil as an integral part
of a 100 Foot long Inverted "L" Antenna.

still searching for answers ~ RHF
.
.