McMurdo Silver Company 903 Licznik częstotliwości
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Model:
903
Data:
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Opis:
Absorption Frequency Meter
Informacja
In transmitter design and construction by the amateur in his
shop or in the commercial laboratory, few instruments are as
necessary as the absorption wave-meter.
With it operation of Oscillator, Amplifier and double,
stages . . . super-regenerative and other receivers . . .
may be investigated and checked rapidly and effectively .Of
particular importance, frequency multiplying stages driven
by a low frequency Oscillator can be checked to insure
output on the correct harmonic.
model 903 Absorption Frequency Meter covers the unusually
wide frequency range from 1600 kcs. up through the new
amateur and civilian 400/500 megacycle ranges. It consists
of an etched aluminum panel carrying a 600-series ,low-loss
Steatite insulated tuning capacitor, inductor socket and
resonance-indicating lamp and socket. A knob and pointer
permit accurate setting of the tuning capacitor to any‘point
upon eight scales,- seven directly calibrated frequency
ranges, the eighth scale 0-100. With suitable inductor
plugged into the rear socket and held near a transmitter
tank circuit, resonance and approximate frequency is
indicated either by dip of plate current meter or by the
indicator lamp.
The extreme frequency range of model 903 Absorption
Frequency Meter is made possible by two different types of
tuned circuits. Upon six ranges the tuning capacitor is in
parallel with the selected inductor wound upon a low-loss
TYPE 125 Micanol Plug-In form and functions as a
conventional parallel-tuned resonant circuit. Upon the
seventh, or 400/500 megacycle range, the inductor is a
Plug-In quarter-wave transmission line with series tuning.
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2
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126.84 Kbytes (129882 Bytes)
Język:
english
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Skanowany dokument, czytając częściowo źle, nie częściowo czytelny.
Data przesłania:
2017 02 04
MD5:
411687b5a7c3307d60241ea4d9dbcbd2
Pobrane:
599