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143-A

143-A ; Western Electric (ID = 1571604) Ampl/Mixer
 
143-A ; Western Electric (ID = 1571607) Ampl/Mixer
 
143-A ; Western Electric (ID = 1571609) Ampl/Mixer
 
143-A ; Western Electric (ID = 1571612) Ampl/Mixer
 
143-A ; Western Electric (ID = 1571617) Ampl/Mixer
 
143-A ; Western Electric (ID = 1571618) Ampl/Mixer
 
143-A ; Western Electric (ID = 1571619) Ampl/Mixer
 
143-A ; Western Electric (ID = 1571620) Ampl/Mixer
143-A ; Western Electric (ID = 1570587) Ampl/Mixer 143-A ; Western Electric (ID = 1570588) Ampl/Mixer
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143-A ; Western Electric (ID = 1570587) Ampl/Mixer
Western Electric: 143-A [Ampl/Mixer] ID = 1570587 600x796
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For model 143-A, Western Electric Company Inc.; New York (NY)
 
Country:  United States of America (USA)
Manufacturer / Brand:  Western Electric Company Inc.; New York (NY)
Year: 1950 ? Category: Audio Amplifier or -mixer
Valves / Tubes 10: 6SN7 6SN7 6SN7 350B 350B 350B 350B 6SN7 5R4GY 5R4GY 0C3 or VR105
Main principle Audio-Amplification
Wave bands - without
Details
Power type and voltage Alternating Current supply (AC) / 105 - 125 Volt
Loudspeaker - This model requires external speaker(s).
Power out 75 W (max.)
from Radiomuseum.org Model: 143-A - Western Electric Company Inc.;
Material Metal case
Shape Chassis only or for «building in»
Dimensions (WHD) 12.25 x 8.5 x 19 inch / 311 x 216 x 483 mm
Notes

The Western Electric 143A Amplifier is a high quality, medium gain power amplifier intended as a basic amplifier for public adress sound distribution systems and wired program service. It has two high impedance input connections controlled by a master volume control; and the chassis has provisions for addition of pre-amplifiers and apparatus units for various input combinations.

Typical characteristics:

  • Frequency response: +/- 1 dB 50 to 15,000 cycles
  • Output noise: -30 dBm
  • Harmonic distortion: See Output Power
  • Source impedance: 0 to 250,000 ohms
  • Load impedance: 1.5 to 170 ohms
  • Loadspeaker line: 70 volts
  • Gain: 52 dB from 600 ohm source
  • Gain control: continuously variable
  • Output power: 75 watts as supplied with Western Electric 350B tubes in the output stage, with less than 5% distortion over the range of 50 to 7,500 cycles. 50 watts, 5% distortion, 50 to 7,500 cycles when reconnected for 6L6 Tubes in the output stage.
  • Power supply: 105 to 125 volts, 60 cycles. 335 watts maximum (3 amperes). Fused with thermal cut out fuse.
  • Mounting: Either surface or rack mounting
  • Finish: Light gray
Net weight (2.2 lb = 1 kg) 46 lb (46 lb 0 oz) / 20.884 kg
Mentioned in -- Original-techn. papers.

Model page created by Tall Wilson. See "Data change" for further contributors.



All listed radios etc. from Western Electric Company Inc.; New York (NY)
Here you find 153 models, 128 with images and 28 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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