Topband: 160m dethroned? 600m the new top band?

DAVID CUTHBERT telegrapher9 at
Mon Feb 13 07:27:33 PST 2012

I believe the proposed rule is 2 watts ERP. The typical 70 x 50 foot top
band inverted-L can be base loaded on 500 kHz using a 500 kHz inductor.
Given an inductor Q of 300 and ground loss of 20 ohms we have a radiation
efficiency of 4%. Drive the antenna with 50 watts and you're on the air at
the legal limit.

   Dave WX7G

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