TopBand: 27m vertical

[Bogyo Istvan]

Dear Fellow LowBanders,

In addition to the beverage sysytem mentioned in another message, I have
already erected a 27 m vertical for transmitting on TopBand. Again, time
is short, I would like to see your input, HOW SHOULD I MATCH the
vertical to 50 ohm coax (RG213). The lower 15 meters of the antenna is
madeof 2,5" aluminum tubing, the upper 12 meters is 1.75" tubing. It has
48 quarterwave radials soldered to a central copper plate and several
grounding rods, the matching network will be in a copper box soldered to
this plate as well, so I assume the losses are quite low, but I have no
idea what the radiation resistance can be. I have no antenna scope, and
probably do not have enough time to make one..

So please advice, what simple matching circuitry should I use?
 
73 es DX

Steve HA0DU


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