General Radio 726 A
1936 - Voltmeter
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General Radio 726 A
1936
- Voltmeter
The Type 726-A Vacuum Tube Voltmeter is a wide-range high-impedance voltmeter for use at both audio and radio frequencies.
3 Valve: 955 75 1-V
Its upper frequency limit is close to 100 megacycles.
It is essentially a spike-reading instrument, except in the lower tv10 voltage ranges, but the scale is calibrated to give readings of the rms values of applied sinusoidal voltages.
Alternating current (AC) source: Less than 30 W, 42, 50, 60 Hz, 100-130V or 50 Hz, 200 to 260 Volt
Frequency Range: 1.5 / 5 / 15 / 50 / 150 V AC, 20 Hz - 50 MHz; with a probe containing the 955 tube.
In 1915, Melville Eastham and Kerro Luscomb formed the General Radio Co. in Cambridge (USA).
The company distinguished itself by the manufacture of electronic instruments, test and precision laboratory equipment.
3 Valve: 955 75 1-V
Its upper frequency limit is close to 100 megacycles.
It is essentially a spike-reading instrument, except in the lower tv10 voltage ranges, but the scale is calibrated to give readings of the rms values of applied sinusoidal voltages.
Alternating current (AC) source: Less than 30 W, 42, 50, 60 Hz, 100-130V or 50 Hz, 200 to 260 Volt
Frequency Range: 1.5 / 5 / 15 / 50 / 150 V AC, 20 Hz - 50 MHz; with a probe containing the 955 tube.
In 1915, Melville Eastham and Kerro Luscomb formed the General Radio Co. in Cambridge (USA).
The company distinguished itself by the manufacture of electronic instruments, test and precision laboratory equipment.
Also in 1936
- 20 of July - The Montreux Convention is signed in Switzerland, authorizing Turkey to fortify the Dardanelles and Bosphorus but guaranteeing free passage to ships of all nations in peacetime.
- 9 of May - Italy formally annexes Ethiopia after taking the capital Addis Ababa on May 5.
- 14 of March - The first all-sound film version of Show Boat opens at Radio City Music Hall. (There had been a part-talkie, part-silent version of Show Boat in 1929.)
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