811-B Series B, Ch= 120228-B

• Country
• United States of America (USA)

• Manufacturer / Brand
• Emerson Radio & Phonograph Corp.; New York, NY

• Year
• 1954/1955

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 80744

• • alternative name: Emerson Television

• Picture
• Schematics

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

• Number of Tubes
• 5

• Valves / Tubes
• 12BE6 12BA6 12AV6 or 12AT6 50C5 35W4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 105 - 125 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3.5 inch = 8.9 cm

• Power out
• 1 W (unknown quality)

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: 811-B Series B, Ch= 120228-B - Emerson Radio & Phonograph

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

• Dimensions (WHD)
• 6.675 x 5.25 x 5.5 inch / 170 x 133 x 140 mm

• Notes
• Conelrad Markings (Civil Defense, CD) on the dial at 640 and 1240 kHz.
  Available in nine different colors: black, white, dark red, pink, light blue, light green, grey, dark brown, dark green.
  Model versions (chassis) were 811-A, 811-B, 811-C, 811-D, 811-E (Series A, B, C, D, E) reflecting presumably minor circuit and component changes. Which colors were used for which series is only partially known. A member has tested the case of a black 811-B (with chassis 120228-B) and wrote: This cabinet looks like a plastic mould but is really Bakelite (fibrous material when broken and a formaldhyde smell when warmed). You can see a swirl effect in the molded body. Somebody else insists that it is modern plastic - and his model does not show a suffix (like B). Therefore we chose to leave the question open until finally cleared with good facts. Mabe there are both versions - but depending on what?
  
  Beitman 1955 (Vol. 15-25) shows one same schematic for 811B Ch=120228B, 812B Ch=120229B, 813B Ch= 120230B and 822B Ch= 120232B and adds: "The circuit printed on this page is exact for 812B (has 2 speakers). 813B is electrically identical except that it uses but a single speaker. 811B also uses one speaker and T-1 grid return terminal #3 goes directly to B Neutral. 822B is like 811B with the addition of a "Jack" for attachments. Beitman shows "12AV6 or 12AT6" for the 2nd Det-AVC-AF Amp.
  
  Photofact 4-55, set 274, folder 8 shows the same schematic for 811B and 822B. Range 540 - 1620 kc. Same alternate tube is listed. Only the Mascomite Back ist different between 811B and 822B (probably only the designation printed) and a slightly different AF output transformer. See also resistors R8 and R9 for the Earphone Jack on 822B only on the secondary of the AF output transformer. There seems to be no separate SAMS for 811A, 811C or 811E but in the index is included 811D for this set 274, folder 8. For 812B / 813B is given 272-6. Optically, 811 (looks like 822), 812 and 813 show quite a different case.

• Source of data
• Beitman Radio Diagrams, Vol. 15, 1955

• Mentioned in
• Collector's Guide to Antique Radios (7th Edition)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 4-55, Set 274, Folder 8)

• Author
• Model page created by Egon Penker. See "Data change" for further contributors.

• Other Models

• Here you find 2071 models, 1147 with images and 1628 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Emerson Radio & Phonograph Corp.; New York, NY