• Country
• United States of America (USA)

• Manufacturer / Brand
• Audiola Radio Co.; Chicago, Illinois

• Year
• 1930/1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 33549

• • Brand: Audiodyne

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

• Number of Tubes
• 5

• Valves / Tubes
• 24A 24A 24A 45 80

• Main principle
• TRF without regeneration; 2 AF stage(s); Screengrid 1926-1935

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 24 cm = 9.4 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: Audiola Junior - Audiola Radio Co.; Chicago,

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Dimensions (WHD)
• 380 x 450 x 230 mm / 15 x 17.7 x 9.1 inch

• Notes
• For this mantle model Audiola Junior (Jr.) a separate table (stand) was available for 7.50 USD. In the "Fall and Winter issue 1930-1931 Radio Merchandise Wholesale Catalog" of "The James Bailey Company", 264 Middle Street, Portland, Maine. The Price is $ 49.50 without tubes and the wholesale price is then $ 29.70 With tubes it is $ 63.30 / $ 37.98.

• Net weight (2.2 lb = 1 kg)
• 10.6 kg / 23 lb 5.6 oz (23.348 lb)

• Price in first year of sale
• 49.50 $ +

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Mentioned in
• Collector's Guide to Antique Radios (5th edition) (picture p.45)

• Other Models

• Here you find 111 models, 39 with images and 56 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Audiola Radio Co.; Chicago, Illinois