Most consumer-type (Ha!) SWR bridges work from 1-30 MHz.
Airband VHF carrier will not excite the bridge to a full scale forward
reading, making the reverse direction reading uncalibratible.
Look for a ham vhf meter - a bridge that works at 144 MHz will do fine
at 120.
I am not sure what "copper strapping" is. Strapping implies mechanical
strength for binding something. Sounds heavy. RST antennas and what
the factory supplies is very thin copper foil. This raises an other issue
learned by many people the hard way: Copper foil has a very different
thermal contraction rate than fiberglass. Therefore if you glue the foil
directly to the glass and pass through a summer and a winter season,
you will most likely find that the foil has torn. What I did was to encase
the foil antenna in wax paper and then glass the wax paper envelope
to the fuselage.
Good Luck
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Ira N224XS
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