Alright so this is a little confusing…  Above is an advert for the Fairchild F-22 microphone, as published in 1965.  This mic is known to be identical to the Syncron AU7A (see previous post)…  so why was it advertised earlier, with a higher price, under the Fairchild name?  Maybe I am getting my dates mixed up here… anyway, Primal Gear in Nashville had a pair of these things for pretty cheap recently, but I was scared-off by the necessity for updating the internal power supply, as Syncron mics require certain mercury cells that are no longer made (or legal, likely).  Anyway…  any of y’all using/have used the F22/AU7A? Let us know…  living here in central CT, once-home of Syncron labs, I feel fairly certain that I will eventually stumble upon one of these things… no luck yet tho.