The simplest way to achieve a bi-directional UHF antenna is to start with any panel antenna that has a reflector and just remove the reflector. Our C2, for example, makes this one step easier, simply don't install the reflector. Antennas like our DB2e or DB4e, for example, requires the drilling out of several rivets to remove the reflector screens.
Your antenna must be installed in a location that gives it a good view in both desired directions.
Do not use anything with an amplifier, you have strong signals that can cause an overload in an amplified system.
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