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12-S-265 Ch=1204

12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 809969) Radio
 
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 320327) Radio
 
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 320328) Radio
 
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 320329) Radio
 
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 320330) Radio
 
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 2163390) Radio
 
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 2163391) Radio
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 66813) Radio 12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 55514) Radio
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 1185000) Radio 12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 140006) Radio
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 1184999) Radio 12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 267457) Radio
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 140007) Radio 12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 140012) Radio
12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 198970) Radio 12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 198972) Radio
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12-S-265 Ch=1204; Zenith Radio Corp.; (ID = 66813) Radio
Zenith Radio Corp.;: 12-S-265 Ch=1204 [Radio] ID = 66813 352x568
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For model 12-S-265 Ch=1204, Zenith Radio Corp.; Chicago, IL:
Zenith Model 12-S-265 (1937) Copy from Ebay
 
Country:  United States of America (USA)
Manufacturer / Brand:  Zenith Radio Corp.; Chicago, IL
alternative name
 
Chicago Radio Lab
Year: 1937/1938 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 12: 6K7G 6L7G 6J5G 6K7G 6T5 6H6G 6J5G 6J5G 6J5G 6V6G 6V6G 5Y4G
schematic requested
Main principle Superhet with RF-stage; ZF/IF 456 kHz
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast, Short Wave(s) and Police.
Details
Power type and voltage Alternating Current supply (AC) / 115 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm
Power out 15 W (unknown quality)
from Radiomuseum.org Model: 12-S-265 Ch=1204 - Zenith Radio Corp.; Chicago,
Material Wooden case
Shape Console with any shape - in general
Dimensions (WHD) 25 x 43 x 15 inch / 635 x 1092 x 381 mm
Notes The schematic diagram got corrections (red). These lines are already missing in the Zenith drawing as well as in Riders and in Beitman.
Bunis predates by one year. This may be based on Zenith 1937 advertising "Preview of new products" in "Blast of the Past". And usually the season started mostly the previous year to get the X-mas sales.
Price in first year of sale 140.00 $
External source of data Ernst Erb
Source of data The Radio Collector's Directory and Price Guide 1921 - 1965
Circuit diagram reference Rider's Perpetual, Volume 8 = 1937 and before
Mentioned in Collector's Guide to Antique Radios 4. Edition
Literature/Schematics (1) Zenith Radio The Glory Years 1936-1945
Literature/Schematics (2) Pre-War Consoles


All listed radios etc. from Zenith Radio Corp.; Chicago, IL
Here you find 4249 models, 3850 with images and 3367 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Zenith Radio Corp.;: 12-S-265 Ch=1204
Threads: 3 | Posts: 3
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zenith: (12-S-265 Ch=1204); 12S265
Konrad Birkner † 12.08.2014
22.Aug.10
  1

Correction made (red). These lines are already missing in the Zenith drawing as well as in Riders and in Beitman. Schematic with the erroneous correction is deleted.

 
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zenith: (12-S-265 Ch=1204); 12S265
John Bartholomew
22.Aug.10
  1

 I am currently restoring a Zenith 12S265. In the center of the schematic that the radio museum lists shows a capacitor called "C". The schematic shows this capacitor being connected to R8. I believe this to be in error. The 12S265 radio I have has this capacitor connected to the first line directly to the right. The line to the right connects to the screen grids of the I.F. amplifier (pin 4 of the 6K7G) The 1st detector (pin 4 of the 6L7G) and to the R.F amplifier (pin 4 of the 6K7G). The line also connects to the positive side of capacitor C25 which connects to the junction of the two 11 Kohm candohm wire wound resistors. This capacitor called "C" on the prints should be called C7 which in my radio and shown on the schematic is a .1 microfarad 400 V.D.C part # 22-170 paper tubular capacitor. Also R8 should be connected to R2 found at the bottom of the secondary winding I. F. transformer #5 and connected to C9. I believe coming off of this R2 resistor is the A.V.C. voltage which goes out to the R.F. amplifier  1st detector, the tuning eye tune, (6T5) and the 6K7 I.F. amplifier.

 

Hope this will be helpfull to someone!

John

 
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zenith: 12-S-265 Ch=1204; tuning belts
Ross Hoff
22.Sep.09
  1

 In restoreing this particular radio I found that the two tuning drive belts had to be replaced. After doing much searching I found rubber O-rings from Mercury Marine that worked perfectly. The part number for the large one is 25-70937,[ I.D. is 3 1/2 inch---width is .135 inch ].  The part number for the small one is 25-20863,[ I.D. is 2.625 inch.--- width is .135 inch ]. The website for Mercury Marine is, www.mercurymarine.com

 
Zenith Radio Corp.;: 12-S-265 Ch=1204
End of forum contributions about this model

  
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