magnétophone en valise ; compteur de tours ; emplacement pour bobines débitrice et réceptrice ; touches réenroulement et avance rapides ; touches lecture et enregistrement ; potentiomètres ; commutateurs pour amplificateur ; Dynamic microphone Electro-Voice modèle 615 (2)
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Ampro Corporation
Chicago, Illinois, 2835 North Western Avenue
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Ouvert :
Longueur : 36 cm
Largeur : 47 cm
Hauteur : 27 cm
Fermé :
Longueur : 36 cm
Largeur : 47 cm
Hauteur : 27 cm
Diamètre :
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Informations non disponibles
Marque : "Ampro Tape Recorder. Pat. Pend. Model 731 105-120 volts 60 cycles 60 watts A.C. only. Ampro Corporation Chicago 18, Ilinois, Made in USA, 245 857". Sur le micro : "Electro-Voice Buchanan Michigan Model 615 Dynamic Microphone".
"Model 731. Weight : 17 pounds. Frequency response : 100 - 7000 CPS. Power output : 2 watts. Power consumption : 60 watts with motor running. Tape speed : 3.75 inches per second. Line voltage : 105-120 volts A.C. 60 cycles only. Amplifier : 3 stage A.C. operated, high impedance input, 3 ohm output impedance. Amplifier tubes : 1 - 12AX7, 1 - 6AU6, 1 - 6AQ5, 1 - 6X4. Speaker : 5" x 7 " Elliptical Alnico 5 PM. Recording head : RF bias, dual track. Input channel : Single high impedance for microphone, direct radio or phone connection. Erase : Permanent magnet, automatic. Playing time: Two hours using dual track recording on 7" reel. One hour using dual track recording on 5" reel. Motor rewind : Speed 2 3/4 minutes for 5" reel, 4 minutes for 7" reel. Fast forward : Speed 3.63 feet per second (average). Reels : Uses either 3, 5 or 7" reels. Microphone : New Compact round type, extremely sensitive. Recording level indicator : Regulated - independent of line voltage. External speaker jack : for 3 ohm voice coil or earphones. Monitor : Audio when radio speaker adaptor cable in use. Instant stop switch : For accurate spotting. Case : Brown leatherette, antique bronze hardware, molded plastic handle, perfectly balanced for easy carrying. Tone control : Resistance-capacity compensation in playback. Only $ 109,50 complete." (Notice The New Ampro-Tape Recorder, Ampro Corporation, 1950).
Notice The New Ampro-Tape Recorder, Ampro Corporation, 1950.