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| No.1 Decremeter (History of Science Museum , London) |
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| No.2 Decremeter (Image via Marconi catalogue) |
GENERAL
A Decremeter is an instrument for measuring the logarithmic decrement of electromagnetic waves. When a tuning circuit was connected to the antenna of a spark transmitter ,the amplitude of the oscillations was suppressed. This was called `damping`. The determination of the decrement of the damping of the antenna oscillations is a measure of the tuning qualities of a radio-transmitter and, in a sense , permits predetermination of the interference to be expected from the transmitter.
FREQUENCY RANGE
No.1 100 to 700 meters
No.2 400 to 3000 meters.
Can also be used as a wavemeter.DIMENSIONS
No. 1 16 x 10.25 x 5 inches
No. 2. 18.5 x 11.5 x 5.25 inches
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| No.1 Decremeter (History of Science Museum , London) |
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| No.2 Decremeter (Image via Marconi catalogue) |
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| Decreneter circuit.Some text on the operation of the Decremeter can be found here. |
Contributors and Credits:1) Lewis Bodkin <05bodkin555(at)gmail.com>
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June 30/21
