On 10/21/2021 12:49 AM, David Gilbert wrote: > His 16 element 20/15/10 tribander looks like an almost complete copy of > my Optibeam OB16-3, except that SP6GXP claims about 2 db more gain on > each band and uses lighter weight materials. It's hard to believe that such an exact copy could have 2 dB more gain. 73, Jim K9YC