SG-303/307 WHIP ANTENNA MANUAL
© SGC 2007
INSTALLATION – VESSEL MOUNTING
In many cases, when a vessel is limited by space, a short and efficient antenna such as the SG-303
or the SG-307 is the best solution for good HF SSB performance. Choose an unobstructed section
of the boat to mount the antenna, as shown below.
Small Power Boat
SMALL BOAT WITH FISHING TOWER
The SG-303/307 whip can be mounted on top of the fishing tower. If this location is used, then the
coupler must also be mounted on top of the tower, preferably in a protected area.
Small Boat with Fishing Tower
The metal structure of the tower can be used as the ground for the coupler. Make sure that the
tower is grounded to the metal structures in the boat, such as the engine, railing, water tanks, etc. If
this is not possible, use at least three 20 foot ground straps to create an RF Ground system by
connecting them to the coupler RF Ground lug and to any metallic structures within the boat such
as the engine, railing, and water tanks.
Mount the antenna
HERE with the
coupler under the
deck
Mount the antenna here with the coupler as
close as possible
A possible
location for
the coupler
Make sure the tower is
adequately bonded to metal
structures inside the boat