[AMRadio] Legal limit AM amplifier, homebrew

Bernie Doran qedconsultants at embarqmail.com
Sun Nov 13 08:06:02 EST 2011


Hi Rick: Forgot to mention antennas, If you can do it use a 1/2 wave dipole 
fed in the center with open wire feeders. 35 feet is ok. if it is a 80 meter 
half wave try to use around 60 feet (1/4 wave) of open wire feeder, that 
will give an easy to match, hi Z at the transmitter location and work all 
the higher bands very well.  The Johnson match box is probably the best 
matching device ever manufactured, Do not use those POS that place a balun 
on the output!  You can also just use a dual cap and coil with taps selected 
for the match.   Bernie 



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