[ARC5] Receiver sensitivity

[Jim Haynes]

I don't know how it compares with more conventional receivers, but the
rare Squires-Sanders receiver uses a 7360 beam switching tube as a mixer.
And as the receiver front end - no RF amplifiers ahead of it.  Squires
wrote an article "A New Approach to Receiver Front-End Design" in QST
for September 1963.  Review of the receiver in QST for May 1964.

The same front end was adopted by Vic Poor for the receivers made by
Frederick Electronics Corp. for commercial/government use back in
those days.  His receivers were all solid state except for the 7360
mixer front end.