From G3PLX: I am sure Jim is right to say "it's not quite true..". As I suggested in my reply to Brian, if a lot of the field lines just 'short-circuit' back to the top of the tower, then there isn't
From G3PLX: The important thing is to maximise the RF current flowing 'into the sky' and minimise the RF current which is just flowing back round behind you into the earthy side of your transmitter.
Similar arguments apply to early ships' aerials. The resonant frequencies claimed, only seem to work out if one adds to the height and half the horizontal of the aerial, ,the height of the metal deck
In a message dated 23/06/2006 17:22:09 GMT Standard Time, [email protected] writes: Dear Peter, LF Group, As I recall, G0MRF's first trans-atlantic transmission was done from the top of a tower
Dear LF Group, There is some info on the "top-fed" antenna used by G0MRF at: http://www.g0mrf.freeserve.co.uk/atlantic.htm Cheers, Jim Moritz 73 de M0BMU
Dear Peter, LF Group, As I recall, G0MRF's first trans-atlantic transmission was done from the top of a tower block with a down-sloping wire as "top loading" - Perhaps David would care to fill in the
