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LH Zenette Ch= 2022

LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 20942) Radio
LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 2240786) Radio LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 216055) Radio
LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 217007) Radio LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 122097) Radio
LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 122096) Radio LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 216054) Radio
LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 216056) Radio LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 216057) Radio
LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 1164681) Radio LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 1164682) Radio
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LH Zenette Ch= 2022; Zenith Radio Corp.; (ID = 2240786) Radio
Zenith Radio Corp.;: LH Zenette Ch= 2022 [Radio] ID = 2240786 1400x1723
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For model LH Zenette Ch= 2022, Zenith Radio Corp.; Chicago, IL
 
Country:  United States of America (USA)
Manufacturer / Brand:  Zenith Radio Corp.; Chicago, IL
alternative name
 
Chicago Radio Lab
Year: 1931/1932 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 51 24 27 51 27 47 80
Main principle Superhet with RF-stage; ZF/IF 175 kHz
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC) / 115 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: LH Zenette Ch= 2022 - Zenith Radio Corp.; Chicago,
Material Wooden case
Shape Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).
Notes [3331454B] This model LH Zenette with chassis 2022 has an unusual 4-gang variable condenser but only 3 IF cirquits - in total 7 tuned circuits. There are also export models with other mans transformers.
Price in first year of sale 50.00 $
External source of data E. Erb 3-907007-36-0
Source of data Zenith Radio The Early Years 1919-1935
Circuit diagram reference Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)
Mentioned in Radio Collector`s Guide 1921-1932
Literature/Schematics (1) Thali schematics, Switzerland Zenith page 5


All listed radios etc. from Zenith Radio Corp.; Chicago, IL
Here you find 4264 models, 3890 with images and 3381 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Zenith Radio Corp.;: LH Zenette Ch= 2022
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zenith: LH Zenette: - Repair of transformer
Eduard Hontele
07.May.08
  1

Repair of the Zenette LH transformer.

 

In my opinion the voltage change from 110 to 220 V, many years ago, seemed the end of life for this radio. To prevent such a mistake a second time I constructed the new transformer ready for the 235 V mains.

The pictures below nearly tell the whole story. The high voltage secondary was damaged by a short circuit. Counting the windings at disassembly shows 4 turns/volt. For comfort two flanges were added.

 

The transformer was rebuilt as follows:

§         High voltage secondary 2760 turns with center tab, dia 0.15 mm  (2 x 345 V)

§         Paper

§         Copper screen from the original transformer. Electrical tape is used to prevent the copper foil to act as a short circuit winding.

§         Paper

§         Primary 940 turns, dia 0.35 mm (235 V)

§         Paper

§         5 volt secondary, 20 turns, dia 1.1 mm

§         Electrical tape for insulation and to fix the wire.

§         2.5 volt secondary, 10 turns with center tab, 2.5 mm2 multicore wire. The center tab is connected with a 0.5 mm2 wire.

§         Electrical tape

 

All wire is renewed. Backing paper was used for separation between all layers. The width of the paper is a bit larger than the inner distance between the flanges to ensure good insulation at the outside. Because the original thick 2.5 volt wire was in bad condition I replaced it with 2.5 mm2 multicore wire. This wire has the advantage being very flexible. Winding is done with a 12V-drilling machine. A foot switch applies the 12V power.

 
Zenith Radio Corp.;: LH Zenette Ch= 2022
End of forum contributions about this model

  
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