Chris W wrote in news:IT3tf.45644$ih5.19066@dukeread11:

I want to put a short 2 meter yagi and a long 70cm yagi on the same
vertical mast. The 70cm will be a horizontally polarized, center
mounted 17' boom and the 2 meter will be a vertically polarized, end
mounted 6 foot boom. How far apart do they need to be? I will only be
transmitting with one at a time but one could be receiving and the other
transmitting, the 70cm will be for ATV receive only for now.

A good rule of thumb is to separate them by at least a half-wave at the
lowest frequency. In this case that means about a meter (39") apart.


--
Dave Oldridge+
ICQ 1800667