Electrified Doerle 3-Tube Signal Gripper

Radio Trading Company; New York

Data
Forum
Pictures
Collections

  • Year
  • 1934
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 258367

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

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Other, details in remarks or not known.
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Electrified Doerle 3-Tube Signal Gripper - Radio Trading Company; New
  • Shape
  • Chassis only or for «building in»
  • Notes

  • The Signal Gripper receiver was designed by W.C. Doerle.  It covered 15 to 200 meters with plug-in coils.

    This version of the Signal Gripper was designed to be use with a AC power supply delivering from 180 to 250 volts with a 2.5 volt filament supply.  Also, a 22 volt tap was needed for the screen grid of the type 57 tube.  However, without changing the ciruit, but by changing tubes, the receiver could be run on storage batteries.

    When operating from a storage battery with "B" batteries for the plate supply, a 78 will be used for the R.F. tube, a 77 for the detector tube and a 37 for the audio tube.

     

  • Mentioned in
  • 1934 Official Short Wave Manual, p.196
  • Literature/Schematics (1)
  • How to Build 4 Doerle Short Wave Sets
  • Author
  • Model page created by Wayne Childress. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum