[ARC5] T-19 Real World Antenna Matching Problem

David Stinson arc5 at ix.netcom.com
Sat Dec 29 20:32:03 EST 2012


The simplest solution for any of the 3-4 MC Command Transmitters
is 200 pFd  1000 VDC or better between the ANT post and 
the coax center conductor.  Adding a  4:1 Unun will improve 
the match and the harmonic attenuation.  
See the photos at:

http://home.netcom.com/~arc5/UNUN/

(shows installation in an RE-2 or BC-442 antenna switch)

For 40 Meters, use 50 pFd.
For 160 Meters, use 1000 pFd.

IMHO, the extra 5% you'll get out with a variable cap 
in place of the fixed one is not worth the "kludge" 
you'll have to do to implement it.  YMMV of course.

73 DE Dave AB5S




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