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If you look in the ARRL Antenna Book there are plans for antennas that use the same type of matching system except they're usually for VHF. One problem I see with Coily's antenna though, from what I've read about this type of antenna in the Antenna Book is the coil should be adjustable for length and the line from the UHF female to the coil should be adjustable where it connects to the coil. In other words the Enforcer is only adjustable for center frequency(length) and not SWR where the I10K is adjustable for both center frequency and SWR.