Re: LF: Antennas

["mal hamilton" <g3kevmal@talktalk.net>]

Merchant ships used inv L antennas slung between two masts and in some cases additional long whips for MF/HF. Aircraft also used inv L and long wire antennas strung between the cockpit and the top of the tail fin for MF/HF plus a trailing antenna that could be wound in/out as required.

No pocket micro or ferrite sticks used. Some early aircraft also had a small loop antenna for DF purposes.

I know why fixed services used large wire arrays,   for directivity and gain and switchable in direction in some cases but not so sure others did. 

A tuned loop on a Battleship could be tricky with all the metal about.

 

mal/g3kev

 

----- Original Message -----

From: Clemens Paul

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, January 03, 2012 10:15 PM

Subject: Re: LF: Antennas

Mal,

 

>Why do commercial receiving stations use large antenna farms out in the countryside ??

 

The reason is to get as much *directivity* gain as possible.

BTW british military vessels since decades used to use tuned loops with a preamp

for VFL/LW/MW operation.

And they operated also in CW in those days...

 

73
Clemens
DL4RAJ

----- Original Message -----

From: mal hamilton

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, January 03, 2012 3:03 PM

Subject: Re: LF: Antennas

4120 - Ausgabedatum: 03.01.2012