702

Zenith Radio Corp.; Chicago, IL

Data
Forum
Pictures
Collections

  • Year
  • 1934
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 19015
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common); ZF/IF 456 kHz
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • AC/DC-set / 115 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 702 - Zenith Radio Corp.; Chicago,
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Dimensions (WHD)
  • 300 x 190 x 140 mm / 11.8 x 7.5 x 5.5 inch
  • External source of data
  • E. Erb 3-907007-36-0
  • Circuit diagram reference
  • Rider's Perpetual, Volume 5 = ca. 1934 and before

 Collections | Museums | Literature

Collections

The model 702 is part of the collections of the following members.

 Forum

Forum contributions about this model: Zenith Radio Corp.;: 702

Threads: 4 | Posts: 17

Dear Forum members,

a friend of mine told me that he had radio that is totally identical to the Zenith 702. The only differend ce is the label Windsor at the front panel, instead of the label Zenith. Please look at the pictures.

At the bottom of the Winsor is the same yellowish paper with the instructions.

Th set has also an non original power resistor of 150 Ohms, in series with the heaters.

Attachments

Georges Van Campenhout † 28.4.22, 12.Aug.21

Weitere Posts (1) zu diesem Thema.

I loaded an other schema and a service manual to the model.

 

M stands in old US shemas for Mille.  See Wikipedia:  Mille, the number one thousand, derived from Latin. Kilo is also thousand. So Bryan is right: M means kΩ. = 1 000 Ohm

In German schemas M stands for Meg. = 1 000 000

Heribert Jung, 10.Nov.10

Weitere Posts (1) zu diesem Thema.

Dear collegues,

  Sometimes, one of us need your help. I am following today.

I found in a deplorable situation a radio device Zenith 702 made in 1934 – in   USA .

I bought from USA a schematic of the electronical parts, wich approved to be identical with the schematic wich appears on Nostalgia .

In the drawing attached , the most resistances are marked with M character. Does somebody knows what this mark represents?

Under the chassis , fixed on the wall with caps, is a wire wound resistance , wich, unfortunately is destroyed. Does somebody knows the value of this resistance and the wats, also its position in the drawing?

I am asking Mr. BIRKNER to reply, because I saw that he has a Zenith 702.

  Thank you,

Best regards,

Ion Carabas  (e-mail address: ion.carabas[A*T]coneco.ro) .

Attachments

Ion Carabas, 05.Nov.10

Weitere Posts (14) zu diesem Thema.

117V,Allstrom;Maße:B=300/H=190/T=140;Röhren:6A6/6D6/75/43/25or26;Baujahr 1933;Zf=456kHz;Quelle:eig.Sammlg.

Konrad Birkner † 12.08.2014, 29.Dec.03

Weitere Posts (1) zu diesem Thema.