Forgot something- big!
I knew I forgot something.
I had thought there was a number that Jerry sang that indicated his voice went even higher than I listed above. Now I remember what it was, and am a bit surprised no one else has mentioned it.
It was "Dance", the opening number on the Twiggy episode of TMS. In this song, Jerry has the lead vocal as the singing feather creature, and the song continually changes key, modulating up, and at the end of each verse, Jerry hits the high keynote. It starts in F Major, goes to F# Major, and ends in G Major. Jerry hits a high G (which is like Leo Sayer high, he ends on a high F# in "You Make Me Feel Like Dancing"). Add to that just two weeks later, in the Kaye Ballard episode, he hits the low low B flat (a good half an octave or more below what most men can sing) in "Oh Babe, What Would You Say?" with Kaye Ballard.
So with what we know, the 3rd B flat below middle C up to the 2nd G above middle C, that's just TWO NOTES short of a full FOUR OCTAVES! I'm willing to bet that he had two more notes up or down (probably down), but I don't know of any examples where he hits notes any higher or lower than what I just mentioned.
I'm tempted to write him a letter and ask if he knows what his full vocal range was back then. I'm betting it was a full four, maybe more.
David "Gorgon Heap" Ebersole