Type Z.R. Double Regenerative Receiving Set 175-600 Meters (ZR)

Clapp-Eastham Co.; Cambridge, MA

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  • Year
  • 1921
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 35307
    • Brand: Radak

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

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration; 2 AF stage(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Type Z.R. Double Regenerative Receiving Set 175-600 Meters - Clapp-Eastham Co.; Cambridge,
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 26.75 x 11.5 x 10.625 inch / 679 x 292 x 270 mm
  • Notes
  • Seven dials (primary tuning control knobs). This set will make a strong appeal to those interested in continuous wave and radio telephone reception by its novel feature of duplicate tuning elements. When two stations are conversing by the above means, at somewhat different wave lengths it is practically impossible to make the necessary adjustments in changing from one to the other without losing a large part of the conversation. With our Z. R. Double Receiver, one set of tuning elements is adjusted to one trans- mitter and the second set of tuning elements is adjusted to the second transmitter and the change over can be made instantly by throwing the two Z. R. S6 switches shown on the front of the panel. The set consists of the same instruments as our Type Z. R. F. D. A., except that all tuning elements are in duplicate, employing a common antenna and ground and a common detector and two stage amplifier. Mounting is in a very heavy oak carry-ing case with handle and when the cover is in the closed position the set is easily portable and is complete and self contained except telephones and batteries. Price does not include bulbs, batteries or telephones, but otherwise complete. Sizes, 26 3/4 inches long, 11 1/2 inches high, 10 5/8 inches deep. Weight, 26 pounds.
  • Net weight (2.2 lb = 1 kg)
  • 26 lb (26 lb 0 oz) / 11.804 kg
  • Price in first year of sale
  • 290.00 $
  • External source of data
  • Ernst Erb

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