BUILD A 2 METER YAGI AND 6 METER YAGI ANTENNA USING THE VELOCITY FACTOR OF COAX TO DECREASE SIZE OF ANTENNA.
Reduce the size of your antennas by using these simple and effective ideas!
From the KGØZP page
The antenna may be built as a MonoBander, DuoBander, TriBander, QuadBander or whatever with great success.
You can either feed it with separate coax's for each band or a single coax, however, separate coax's make it much easier to tune.