→ Related artifacts
Aeroplane Antenna Reel. Type RL-2
Two winding reels for antenna wire. →
All-Test Instrument Resistance
Amrad Variometer 2752
Amrad Wavemeter Type D
Antenna insulators (2)
Labelled “Brown Beezer 6-7-87” →
Audibility Meter Type 164B
Audion Control Box SE-1071
Made for Navy Sept (BU. S. E.) →
Buzzer on Board
Cracraft-Leigh telephone
Handcranked wall-mount telephone with wood cabinet. →
Dial Decade Testing Set, E-3105
Eaton Oscillator Type – Triode C
Framed Photos: First Radio Beacon Transmitter built by Robert Kruse, Chesapeake Bay
General Electric Giant Rheostat
Early Day Wireless →
General Electric motor alternator type CY81A
Motor alternator made for U. S. Army Signal Corps. →
General Radio Type 247 C Variable Air Condenser
General Radio Wave Meter Type 174 B
Jefferson Tube Rejuvenator
Jefferson Tube Tester
Jewel Radio Test Set Pattern No. 95
Jewel Radio Test Set Pattern No. 95
Jewell Radio Set Analyzer Pattern 199
with/ Super Airline CX-201A 62-63" w/Instructions for Servicing Radio Receivers, Jewell Electrical Instrument Co., 1650 Walnut Street Chicago →
John Firth & Co. Electric Plate-Condenser
Long Wave Loading Unit Type IP 503
Marconi Contact Switch
N.R.I Tape No 7 / N.R.I Tape No 8
N.R.I Tape No 3 / N.R.I Tape No 4
NEARC Lifetime Member Plaque for Robert Merriam
Omnigraph Morse code trainer
Spring-driven Morse code trainer mounted on wood base, with 10 code disks. →
Omnigraph Morse code trainer
Spring-driven Morse code trainer mounted on wood base, with 10 code disks. →
Pattern 560 Service Test Oscillator
Photo: Gerry Travis and Bill Halligan
Power Coupler
Precision Condenser
At the museum: Massie Station Maker: General Radio Co. Place: Cambridge, Mass U.S.A Date: Donor: Specifications [delta]C=1000 M.M.F. Type 22-M Serial No. 1435 →
Radio Club of America Certificate Given to Robert E Merriam
Radio Frequency Ammeter Type CT1477
Radio Phone Diagram
Radio Telegraph Co.
Roller-Smith Co. Ohmeter Type Com
“S.O.S.” from a painting by Fredrick Roe (1864-1947)
Signal Corps US Army Antenna Tuning Unit BC-306-A
Signal Corps Wireless Set No 19 MK II Aerial Variometer
Signal flag kit
U. S. Army signal flag kit in canvas carrying case. →
Spare Valve Case
The Nacometer [Automatic Code Transmitter]
The Omnigraph No. 2
This device from the early 1900s is used to teach Morse Code or Continental Code. It has a spring driven clock works that rotates bumps on an aluminum disk against an electrical contact. The bumps on the aluminum code disk contain patterns of Morse Code characters. When the bumps touch the electrical contact the circuit … Continue reading "The Omnigraph No. 2" → Alexanderson Alternator Thrust Bearing Pressure Gauge from Marion Mass
Tuning Capacitor
U.S. Navy Portable Wave Meter
Universal Sterling Tube Tester R-408
Unknown Variocoupler
Veifa-Werke-Frankfurt A/M Rontgenzwecke
National Electrical Supply Wavemeter Type SCR 61
Made for the U. S. Army Signal Corps. → Western Electric Airplane Interphone type S.C.R. 57
Wired system for communicating between airplane pilot and 'observer' with connection for wireless receiver/transmitter. In box with cables and connection diagrams. Made for U. S. Army Signal Corps. → Weston Direct Current Voltmeter
Weston Meter Model 301
Weston Model 537 No. 1648 Radio Set Tester
With/ The Instructions for use →