• Year
  • 1951
  • Category
  • Medical Technology
  • Radiomuseum.org ID
  • 163340
    • alternative name: Chicago Radio Lab

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hearing aid
  • Power type and voltage
  • Dry Batteries / 2 x 1,5 & 22,5 Volt
  • Loudspeaker
  • - only for Earphone!
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Royal Hearing Aid - Zenith Radio Corp.; Chicago,
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 57 x 75 x 20 mm / 2.2 x 3 x 0.8 inch
  • Notes
  • Normally the case was of gold-colored anodized aluminum. Limited quantities of the Royal were made with a black case.
  • Net weight (2.2 lb = 1 kg)
  • 0.090 kg / 0 lb 3.2 oz (0.198 lb)

 Collections | Museums | Literature

Collections

The model Royal is part of the collections of the following members.

 Forum

Forum contributions about this model: Zenith Radio Corp.;: Royal Hearing Aid

Threads: 1 | Posts: 1

L'apparecchio momta 2 batterie da 1,5 Volt, ma ne viene utilizzata, per il funzionamento, una sola; dispone, infati, di un piccolo commutatore che effettua lo scambio della batteria, quando questa si sta per scaricare.

Antonio Maida, 09.Mar.12

Weitere Posts (1) zu diesem Thema.