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Tuning
Tuning Hints
According to prior instructions, assemble and erect antenna, radial plate, radials and top hat and
then the two tuning coils (series and shunt) to the base of antenna and radial plate. Raise the
antenna.
Staying at least fifty feet from the base of the antenna (using at least a 50’ piece of low loss coax
such as RG-213U) set up to use either an antenna analyzer or an HF radio as an SWR indicator.
A fifty foot RG-213U with PL-259 connectors installed is available from DX Engineering as part
number
DXE-213UDX050
.
In some areas, due to the signal capture ability of this antenna at low frequencies and the close
proximity of AM Broadcast Stations some Antenna Analyzers such as the Rig Expert
REU-AA-54
or others of similar design may not be able to be used. It will be necessary to use a normal HF rig
with an SWR indicator. We have used both methods and the results are the same.
To determine if your location is near AM broadcast stations which may interfere, go to this website
and enter your location: Using your zip code:
Using Longitude and Latitude information -
http://radio-locator.com/cgi-bin/locate?select=lonlat
Naturally, using your Longitude and Latitude information [which can be obtained on your qrz.com
page] is MUCH more accurate.
Tuning Procedure
Place the SWR coil tap clip-lead in the middle of the
Shunt Coil
(the coil mounted to the Radial
Plate on the “L” bracket).
Short out the
Series Coil
(the coil mounted to the antenna feedpoint with the straight bracket)
completely with the coil tap clip-lead provided.
