• Year
  • 1950/1951
perfect model
  • Category
  • Television Receiver (TV) or Monitor
  • Radiomuseum.org ID
  • 276031
    • alternative name: Emerson Television

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

 Technical Specifications

  • Number of Tubes
  • 23
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • VHF incl. FM and/or UHF (see notes for details)
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • Permanent or electro-dynamic (moving coil), system not known yet.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 678 or 678 Series B - Emerson Radio & Phonograph
  • Shape
  • Console with any shape - in general
  • Notes
  • Emerson 678, Series B (678B): Round CRT 16" b/w TV with US FCC standard VHF tuner.

    Usage of the 23 Tubes: 6BC5 1st RF Amp; 6CB6 2nd RF Amp; 6J6 Converter; 6AU6 1st Video IF Amp; 6AU6 2nd Video IF Amp; 6AU6 3rd Video IF Amp.= alt circuit in chassis 120134B; 6AU6 4th Video IF Amp = alt circuit as V6; 6AL5 Video Det+AGC; 6AC7 Video Amp; 6AU6 Sound IF Amp; 6AU6 Limiter; 6T8 Discr./AF Amp; 6V6GT Audio Output; 12AU7 1st Sync Sep/1st Sync Amp; 12AU7 2nd Sync. Sep./2nd Sync Amp+Sync Phase Inv; 6SN7GT Vert Mult; 6K6GT Vert Output; 6SN7GT Horiz. AFC/Horiz OSC; 6BG6G Horiz. Output; 6W4GT Damper; 1B3GT HV Rect; 5U4G LV Rect; 16GP4 Picture Tube.

    The models in ads often don't carry the suffix B. On a folder (in green) we find part of this family of TV receivers with "rectangular" 16" screens (661B, 667B, 668B, 674B, 677B, 678B, 684B and 685B) plus a 14" 662 table model (bakelite, not shown is the 664 console 12") with Simplimatic Tuning, Built-in-Antenna as value leader, followed by the three 17" table models 676, 680 and 696 plus 17" consoles 686, 687; 19" console 688, 689 and 690 plus 20" consoles 692, 693 and 694. See also SAMS #148 with 676F,D, 681F, 686F, 686L, 687F, 687L, 696F and 696L plus SAMS #131 for 660B, 664B and 673B with chassis 120133-B. And for the year before the models TBD, 663 14" tabletop; model 666 with 16" as TV-AM-FM-phono receiver and model 669 with 19".

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

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