Which antenna? I'm not familiar with a 5/8λ dual band Larsen. The one I have is 1/2λ on 2m and collinear 1/2λ on 70cm.
'91 Pickup - Imelda
'08 Tacoma TRD
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche