Re: Boeing 720

Date:         24 Jan 98 14:46:57 
From:         HERB FELDMAN <az944@lafn.org>
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> The main visible difference of the Boeing 720, it does not have a
> metal tube jutting foreward at the top of the vertical fin.

I believe the "metal tube" on the vertical fin of the 720 was a HF antenna.
Also, the first jet Air Force ones were modified 720s.