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When I used to visit the Radio Club in Liverpool in
the late 50s we met in a church hall just off Queens drive. One local with
topband mobile parked in the drive would fire up 10W of top band take out a tube
from the rear of his A35 van, strike it and walk round the van. We got many
"double-takes" from passers by ......it was a 15inch circular tube and he was
holding it above his head like a halo :-))
Under the top wire it doesnt mean the
horizonal wire is radiating but there will be a vertical field sufficient
to strike the tube to near full brilliance.....RF excitation is very efficient.
but you are in the near field and radiation of the current in the loop will
mainly be cancelled by the induced current in the ground. I suppose any
far-field RF would go straight up anyway?
Alan
G3NYK
----- Original Message -----
Sent: Wednesday, November 04, 2015 5:00
PM
Subject: Re: LF: Capacitive top hat
question
The fluorescent light in my shack is located only 3m below the
end of my top hat - with roof tiles and plasterboard in the way. In dry
weather lights quite bright when I transmit, with even as little as 100 Watts
into the antenna.
Andy G4JNT
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