Ken Simpson, W8EK wrote: > Which series of Omni? Series A with squelch? Series B with rotary > filter selector and notch? Series C with up-down toggle switch > filter selection? Fair question. My bad! I just got on the TT bandwagon in '94 with my Omni 6, so didn't realize there were that many flavors of the D :-( Tag on the back says *Series B* 73, Carter K8VT