Measuring Tape Vertical Antenna 2013-12-31 OH7SV

This an adjustable measuring tape 1/4 wave vertical flag pole antenna.
This antenna can be adjusted for any frequency from 10 MHz to 30 MHz by using the flag rope.
The common mode choke is recommended to avoid common mode RF currents in coaxial cable.

Measuring tape antenna construction in a flag pole. Radial lenght is not critical. Click picture for pdf file

Try to find a measuring tape with a hole-rivet in the end, otherwise
make a hole or remove the loose end part for wire connection.