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K725 Ch= 7K01 early, no "saver"

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 152719) Radio
 
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985104) Radio
 
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985105) Radio
 
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985106) Radio
 
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985107) Radio
 
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985108) Radio
 
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985109) Radio
 
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985110) Radio
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 2345313) Radio K725 Ch= 7K01; Zenith Radio Corp.; (ID = 2345314) Radio
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 2345315) Radio K725 Ch= 7K01; Zenith Radio Corp.; (ID = 253824) Radio
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 336326) Radio K725 Ch= 7K01; Zenith Radio Corp.; (ID = 336325) Radio
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 336327) Radio K725 Ch= 7K01; Zenith Radio Corp.; (ID = 336329) Radio
K725 Ch= 7K01; Zenith Radio Corp.; (ID = 1736799) Radio K725 Ch= 7K01; Zenith Radio Corp.; (ID = 1772193) Radio
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K725 Ch= 7K01; Zenith Radio Corp.; (ID = 2345313) Radio
Zenith Radio Corp.;: K725 Ch= 7K01 [Radio] ID = 2345313 1400x1050
Select picture or schematic to display from thumbnails on the right and click for download.
For model K725 Ch= 7K01 early, no "saver", Zenith Radio Corp.; Chicago, IL
 
Country:  United States of America (USA)
Manufacturer / Brand:  Zenith Radio Corp.; Chicago, IL
alternative name
 
Chicago Radio Lab
Year: 1952 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 6BJ6 12AT7 12BA6 12BA6 12AU6 19T8 or 19C8 35C5
Main principle Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
Tuned circuits 7 AM circuit(s)     11 FM circuit(s)
Wave bands Broadcast (BC) and FM or UHF.
Details
Power type and voltage AC/DC-set / 117 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
from Radiomuseum.org Model: K725 Ch= 7K01 [early, no "saver"] - Zenith Radio Corp.; Chicago,
Material Modern plastics (no Bakelite or Catalin)
Shape Tablemodel, Mantel/Midget/Compact up to 14" width, but not a Portable (See power data. Sometimes with handle but for mains only).
Dimensions (WHD) 400 x 240 x 220 mm / 15.7 x 9.4 x 8.7 inch
Notes This is the early model K725. 10 Years later Zenith introduced a K725 as K725L, B, C and W with quite an other case and chassis. The K725 early has a Selenium Rectifier.
After a short time the models received a "Tube Saver" and we introduced therefore a variant to be able to distinguish. Please be careful where to place pictures.
Collectors' prices  
Source of data Collector's Guide to Antique Radios 4. Edition
Literature/Schematics (1) Beitman Radio Diagrams, Vol. 13, 1953 (SAMS Photofact set 212, folder 10, August 1953)

Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.



All listed radios etc. from Zenith Radio Corp.; Chicago, IL
Here you find 4053 models, 3483 with images and 3220 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Zenith Radio Corp.;: K725 Ch= 7K01
Threads: 1 | Posts: 2
Hits: 3583     Replies: 1
zenith: Ch= 7K01 (7 K 01); K725 (K 725) with tube life saver
Dave Turner
24.May.09
  1

My version of this model has a feature called Tube Saver.  The manufacture date was Jan 12, 1953, and the model numbers show no variation as a result of this added feature.  The model number is K725, the chassis is 7K01.  The bottom label states K725 Walnut.  This information is added at the request of Ernst Erb.  You can also see this device on model H511 as contributed by Mario Bermejo.

Attachments

Ernst Erb
27.May.09
  2

Dear Dave
Thank you very much for your kind post, stating about your early K725 of the second edition - with Tube Saver.

I did now update the models K725 which came about 10 years later, like K725W etc. but also introduce a variant K725 with Tube Saver. Can you please post all your nice pictures which you show here to the new variant? They may also be of the maximal width of 933 pixels - if you have them handy at that size.

Thank you. I leave this thread on the old variant which shows then also your pictures as attachment. This is the way how a refereence work can be built up - giving all the facts for the models possible - showing the whole picture about a "family" of models.
I hope you like this way.

 
Zenith Radio Corp.;: K725 Ch= 7K01
End of forum contributions about this model

  
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