Antenna

[Guest yooper]

 I have a CB antenna and gmrs Jpole antenna on the same mast 3 apart. Will the two antennas in close proximity to each other lessen radio transmitting power? Will one radio bleed over to the other radio while transmitting?Only one radio will be transmitting at a time. My gmrs radio is 20 watts and the CB is 3 watts.

Any help is appreciated!

[SteveShannon]

6 hours ago, Guest yooper said:

 I have a CB antenna and gmrs Jpole antenna on the same mast 3 apart. Will the two antennas in close proximity to each other lessen radio transmitting power? Will one radio bleed over to the other radio while transmitting?Only one radio will be transmitting at a time. My gmrs radio is 20 watts and the CB is 3 watts.

Any help is appreciated!

They should not affect each other significantly. Edited to add: Mount one above the other rather than on the same level.

[WRUE951]

I have always heard that objects I.e. other antennas, should be horizontally spaced at least one wave link away from operating antenna.  So with that, your concern would be with your CB antenna.   At 27MHz you would need about 17 feet of clearance from other objects.   GMRS antenna would need around 2 feet.   Now how critical this is to radio performace, I have no idea.   But if you Google the subject, you’ll find lots of theories