On Sun, 20 Dec 2009 13:33:55 -0800, jim ham
wrote:


This is a description of the design Jim Wier promoted years ago.

Weir


His
design included a couple of ferrites slipped around the coax to keep the
shield from ringing (introducing a lossy element). I'm not sure if these
count as ferrite transformers.

They do not.



Everybody talks about transmit power, but 1W transmitted from the
antenna is plenty for aircraft. The real difference you will see with a
good antenna is receive sensitivity. A good transmit antenna is a good
receive antenna and vice-versa.

The effective range of a 1 watt transmitter on one end and a 1
microvolt receiver on the other end is something on the order of 2000
miles, which is why we can talk to Spacelab with a handie-talkie quite
easily.

Jim