On Fri, 03 Oct 2003 08:53:21 -0700, Alain wrote:

They were made in Refugio, Texas in the late 1960's thru the '70's.
There was a High VHF, Lo VHF and an Aircraft unit. They were tunable and
available with a separate squelch unit that attached to the receiver by
a motorola plug. ...

I still have a few Tompkins Radio Tunaverters
and published a photo of a 348S in October 2003
Monitoring Times (current issue).

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Bob Parnass, AJ9S GNU/Linux User http://parnass.com