Our building was the technical library for the Evans Signal Laboratory, and was built in 1941.
This was once David Sarnoff's secretary's desk.
Marconi Belmar history
The beginnings of the Information Age.
Clarke's Third Law
Morse telegraph demo.
Working magneto telephone.
Working demonstartion of the first phone in public service.
Code practice: CW and Spark.
Working Marconi spark transmitter. Guglielmo's mother was a Jameson. That's an important part of the story.
Closeup of the tuning demo. It hears about seven AM stations.
Armstrong's discovery of regeneration. Hear spark signals on a regenerative detector. It's not what you'd expect.
Hear what Armstrong and Sarnoff heard at the Marconi Belmar Station in 1914.
The other end of the butterstamp telephone circuit.
1921 Radiola RC demo.
Very early Zenith and RCA superheterodyne.
1924 Atwater Kent 20C demostration.
These were battery sets!
The visible RCA from the 1930's.
1930's table-top sets.
Early small broadcast receivers.
1942 car radio in chairside form.
Early Shortwave Radios
1948 TV camera demo. Yes, we're cheating.
RTM Diner jukebox demo.
Microphone explanation and Edison cylinder machine.
One of our guys wrote the book on 45's.
1950's high fidelity.
Old Speakers and Stereo Demo
The developmet of the loudspeaker demo.
Choose speaker and program.
Basic electricity and magnetism.
Demonstrating the efficiency of LED's.
WWII Tactical Communications.
Radio relay and mule-pack radio.
Model 19 Teletype demo
POW receiver - Lineman's Tool Kit - Quartz Crystals
First Walkie-Talkie First Handi-Talkie
M-209 Cypher Machine
SCR-300 FM Walkie Talkie
Wireless Set 19 on Right
SCR-694 Man Pack