• Year
  • 1956
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 82578
    • alternative name: Dumont Television & Radio

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 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 110 - 120 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 1120 - DuMont Labs, Allen B., Inc.
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Notes
  • The Dumont Model 1120 is an AC Operated 5 Tube AM Receiver.
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 17, 1957
  • Author
  • Model page created by Egon Penker. See "Data change" for further contributors.

 Collections | Museums | Literature


Forum contributions about this model: DuMont Labs, Allen B: 1120

Threads: 2 | Posts: 6

I'm preparing to restore the circuit of a Dumont 1120.  I noticed that the measured resistances for couplet were far off.  The 470K resistor between pin 5 and pin7 measured 1.8M ohms.  The other 470K resistor between pin 6 and pin 4 measured 5.5M ohms.  And the 10Meg resistor between Pin 1 and Pin4 measured 16.5M ohms.

Is it common for these to fail?  I just had to rebuild one on a Sylvania R518 couplet.

Schematic included by DR









Jay Graven, 01.Oct.21

Weitere Posts (3) zu diesem Thema.

 Restoring a Dumont 1120 clock radio.  Unfortunately all four screw posts have broken away from the cabinet.  I still have the broken posts attached to the screws.  Anyone know a good way to reglue the broken posts back to the cabinet?  Will JB Weld work??

Jay Graven, 27.Sep.21

Weitere Posts (3) zu diesem Thema.