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Altec Lansing 21B
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Altec Lansing 21B

Micro statique à transistors à petite membrane de la marque Altec Lansing

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  • Fabricant : Altec Lansing
  • Modèle : 21B
  • Catégorie : Micros statiques à transistors à petite membrane
  • Fiche créée le : 13/09/2015

"This is a fantastic mic, and I have four of them. It's an omni condenser, and [for jazz recording] what you do is wrap the base of the mic connector in foam and put it in the bridge of the bass so that it sticks up and sits right under the fingerboard. It wouldn't be my choice for orchestral sessions, though.”

Hear it on... Swedien's numerous recordings for Oscar Peterson between 1959 and 1965.

FREQUENCY RANGE: 20 cycles through 15,000 cycles. OUTPUT LEVEL: -48DB. re 1 milliwatt for a sound field of 10 dynes/cm2. DIRECTIONAL CHARACTERISTIC: OMNIDIRECTIONAL. HUM PICKUP: Microphone not susceptible to magnetic fields. LOW FREQUENCY CUT-OFF POSITIONS: 20 cycles, 40 cycles, 120 cycles. OUTPUT IMPEDANCE: Nominal, 30 ohms, 250 ohms, 500 ohms. RMA ratings, 38 ohms, 150 ohms, 600 ohms. POWER REQUIREMENTS: 117 Volts, 60 cycles A.C ELECTRICAL CAPACITANCE OF 21B MICROPHONE: Approximately 6 micromicrofarads. OUTPUT VOLTAGE OF 21B MICROPHONE ALONE (open circuit): Approximately -50 DB. re 1 Volt per dyne/cm2. VACUUM TUBES: 1-6AU6. RECTIFIERS: 1—Fansteel BC-029M (Selenium dry disc type). 1—Fansteel ADL-22 (Selenium dry disc type). 21B MICROPHONE: Length, 3/8"; Diameter, 5/8"; Weight, 1/4 ounce. 150A BASE: Length, 8-3/16"; Diameter at base, l1/8"; Diameter at top, 13/16"; Weight, 53/4 oz. COMBINED LENGTH 21B MICROPHONE, 150A BASE AND 152A CABLE SET CONNECTOR: 11l/2". P518A POWER SUPPLY: Height, 71/2"; Width, 81/4"; Depth, 6"; Weight, 11 1/2 pounds. M11A SYSTEM: Weight (unpacked), 13 pounds 9 ounces. FINISH: 21B Microphone, bright steel; 150A Base, satin black; P518A and P519A, gray. MOUNTING: 5/8-27 or suspension. 152A CABLE SET: Length with connectors, 25 feet; Weight, 1 pound 11 ounces. RR6839 MULTI-CONDUCTOR CABLE: Diameter, 9/32"; Weight per hundred feet, 5 pounds. CABLE CONNECTORS: Cannon P8-CG-11S (female), Cannon P8-CG12S (male).

 

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Autres dénominations : 21 b