Does the thickness of the material used in antenna construction make any
difference to its performance? (Other than the obvious mechanical strength)
I have the option of using 3mm copper rod OR 15mm Copper pipe for 2m and
70cm 1/4 wave groundplanes.

73
Roger ZR3RC



Yes, resonant frequency will change. To maintan the resonant frequency you need
to shorten the thicker diameter elements.

Yuri, K3BU