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Radio
Receiving Set AN/ARR-41, designed for mounting in larger types of aircraft
and capable of receiving Amplitude Modulated Radiotelefony (A3), Unmodulated
cw Radiotelegrafy (A1), and Frequency Shift Keyed Radioteletype (A2), when
an external converter is employed for operation of the printer. Radio
Receiving Set AN/ARR-41 is a superheterodyne receiver capable of receiving
r-f signals from 190 to 550 kilocycles and from 2 to 25 magacycles. Double
conversion is used in all bands except band 2. The 2 to 4 megacycles band
which is single conversion. Two r-f stages, three if stages and three audio
stages are employed for amplification, which brings The over-all sensitivity
to at least 100 milliwatts output for less 5 microvolt input selectivity is
Obtained through resonant circuit in all bands and trough one of two
magnetostriction mechanical Filters in the I.F. circuit. A built-in circuit
consisting of a 500 kilocycle-cristal-controlled oscillator and a
multivibrator provides for frequency calibration. Allowing frequencies to be
set up accurately at each 100-kilocycles check point trough out the range of
reception cooling within Radio Receiving Set AN/ARR-41 is accomplished by a
dynamotor fan and by convecthon trough Louvers-Modular. Unitized
constructionis employed, greatley simplifying trouble-shooting and
maintenance operation. |
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