Prototype of 26-tube HF Receiver
Sylvania Reconnaissance Systems Laboratory
Mountain View, California

Sylvania Receiver photo 1
Sylvania Receiver photo 2
Sylvania Receiver photo 3
Sylvania Receiver photo 4
Sylvania Receiver photo 5

A proposed HF receiver from the golden age of vacuum tube engineering.
Was this receiver ever manufactured? Any information would be appreciated.

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