Hallicrafters HT7
1939 - Frequency Meter
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© Cláudia Damas
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Hallicrafters HT7
1939
- Frequency Meter
The Hallicrafters HT7 is a frequency standard, a stable oscillator used for calibration or frequency reference, which generates a fundamental frequency with a high degree of accuracy and precision. The harmonics of this type of frequency are used to provide reference points.
4 valves: 6F6 6L7 6N7 80
AC power supply: 110 Volt
Frequency range: 1 MHz - 30 MHz
In 1932, William J. Halligan founds Hallicrafters, in Chicago (USA).
At the end of World War II, Hallicrafters, which supplied the American army, was a prestigious brand for Shortwave equipment.
4 valves: 6F6 6L7 6N7 80
AC power supply: 110 Volt
Frequency range: 1 MHz - 30 MHz
In 1932, William J. Halligan founds Hallicrafters, in Chicago (USA).
At the end of World War II, Hallicrafters, which supplied the American army, was a prestigious brand for Shortwave equipment.
Also in 1939
- 10 of September - World War II: The submarine HMS Oxley is mistakenly sunk by the submarine HMS Triton near Norway and becomes the Royal Navy's first loss.
- 6 of September - World War II: At the Battle of Barking Creek, Britain suffers its first fighter pilot casualty of the Second World War as a result of friendly fire.
- 24 of May - First issue of Fashizmi is published in Tirana.
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