[TowerTalk] Converting 3 el 10/15/20M yagi to 12/17M

[Bert]

Hi guys,

Looking for info how to convert a 3 el yagi for 10/15/20 meters to 12/17
meters. I have two antennas that may be suitable for this conversion -
Mosley MP-33 and a TA-33. Any ideas appreciated. 

73 Bert, VE3OBU