K725 Ch= 7K01 early, with "saver"

Zenith Radio Corp.; Chicago, IL

Data

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Country
United States of America (USA)

Manufacturer / Brand
Zenith Radio Corp.; Chicago, IL

Year
1952/1953

Category
Broadcast Receiver - or past WW2 Tuner

Radiomuseum.org ID
155682

- alternative name: Chicago Radio Lab

Picture
Schematics

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985111) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985112) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985114) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985115) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985116) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985117) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 985118) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 3083349) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (3)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 2377297) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (1)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 764724) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (2)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 764725) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (2)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 619101) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (1)
Early K725 with "Tube Life Saver"

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 619204) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (1)
K725 tube saver connection

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 619203) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (1)
K725 label (with tube life saver)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 619206) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (1)

K725 Ch= 7K01; Zenith Radio Corp.; (ID = 2377298) Radio — Zenith Radio Corp.; K725 Ch= 7K01 (1)

Click on the schematic thumbnail to request the schematic as a free document.

Technical Specifications

Number of Tubes
7

Valves / Tubes
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.

Power type and voltage
AC/DC-set / 117 Volt

Loudspeaker
Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

Material
Bakelite case

from Radiomuseum.org
Model: K725 Ch= 7K01 [early, with "saver"] - Zenith Radio Corp.; Chicago,

Shape
Tablemodel without push buttons, Mantel/Midget/Compact up to 14

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 this variant to be able to distinguish. Please be careful where to place pictures. Please show also the back wall.

Literature/Schematics (1)
Beitman Radio Diagrams, Vol. 13, 1953 (SAMS Photofact set 212, folder 10, August 1953)

Author
Model page created by Ernst Erb. See "Data change" for further contributors.

Other Models
Here you find 4505 models, 4101 with images and 3631 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Zenith Radio Corp.; Chicago, IL

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The model K725 is part of the collections of the following members.

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