Topband: Shunt feed short tower
Earl W Cunningham
k6se at juno.com
Tue Jun 6 00:07:59 EDT 2006
Kelly's (N0VD) tower is too short to shunt feed on 160m with a gamma
(single capacitor) match, as he's been trying to do unsuccessfully.
The answer for a tower that short is to use an omega (two capacitor)
match. I suggest a shunt wire tap height of 35 feet or so.
An omega match will tune virtually anything and it is not necessary for
the tower to be resonant at any frequency when using this method. Just
install the shunt wire and the two variable caps and tune them for lowest
SWR on the desired frequency.
73, de Earl, K6SE
More information about the Topband
mailing list