The Sony Model ECM-56F cardioid electret condenser microphone
MANUFACTURER’S SPECIFICATIONS
Capsule: Back-electret condenser
Directivity: Unidirectional
Impedance: 250 ohms ±20 per cent at 1 kHz, balanced
Frequency Response: 20 Hz to 20 kHz
Output Level: Effective output level –53.8 dbm (0 dbm = 1 mW/10 µBar, 1000 Hz); open circuit voltage, 0.2 mV/µBar at 1000 Hz, output level deviation ±2 dB
Recommended Load Impedance: More than 3 kilohms
Maximum Input Level: Approximately 134 dB SPL
Noise Level: Less than 28 dB SPL (0 dB SPL = 2×10-4 µBar)
Wind Noise: Less than 40 dB SPL at 2 m/S velocity
Induction Noise from External Magnetic Field: Less than 5 dB SPL at 1 milligauss, 50 Hz
Power Requirements: 7 to 9 vdc, 1 mA max. from internal battery or 24 to 54 vdc, 3.5 mA from external power supply
Battery Life: Approximately 400 hours with Eveready 216 manganese, or approximately 600 hours with Eveready E146 mercury
Cable: Attached, ⁷⁄₃₂-inch diameter (5.2 mm), two- conductor shielded cable with Cannon XLR-3-12C plug, 20 ft. (600 cm)
Mounting Thread: PF-½
Dimensions: 2 in. (5 cm) × 8¼ in. (20.7 cm)
Weight: 1.06 lbs. (500 gms)
Finish: Non-reflective satin nickel
Accessories Supplied: Stand adapter PF-½ to NS-⅝*
_________________________ *American National Thread-Special. The American National Standard has been obsolete since 1949 and replaced with the Unified National Standard. The NS (American National Thread-Special) thread type was absorbed (in a way) into the Unified Series during WW2. Apparently there were/are “subtle,” “benign,” or “minor” differences between the NS and UNS thread.
The following illustrations and text are reprinted from the January 1979 issue of Audio.
Microphone courtesy of Jeff Rudisill
Photo courtesy of Bob Cadar
Photo courtesy of Bob Cadar
Photo courtesy of Bob Cadar
Photo courtesy of Bob Cadar
The following ten photos are provided through the courtesy of Miguel Bedolla.
