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Radiotrola Baby Grand

Radiotrola Baby Grand; National Airphone (ID = 2091360) Radio
Radiotrola Baby Grand; National Airphone (ID = 1789086) Radio Radiotrola Baby Grand; National Airphone (ID = 1789087) Radio
Radiotrola Baby Grand; National Airphone (ID = 1789088) Radio Radiotrola Baby Grand; National Airphone (ID = 1789089) Radio
Radiotrola Baby Grand; National Airphone (ID = 1789090) Radio Radiotrola Baby Grand; National Airphone (ID = 1789091) Radio
Radiotrola Baby Grand; National Airphone (ID = 1789092) Radio Radiotrola Baby Grand; National Airphone (ID = 1789093) Radio
Radiotrola Baby Grand; National Airphone (ID = 1789094) Radio Radiotrola Baby Grand; National Airphone (ID = 1789095) Radio
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Radiotrola Baby Grand; National Airphone (ID = 1789086) Radio
National Airphone: Radiotrola Baby Grand [Radio] ID = 1789086 1400x1567
Select picture or schematic to display from thumbnails on the right and click for download.
For model Radiotrola Baby Grand, National Airphone Corp.; New York (NY):
eBay item number:261773932286 - The radio set pictured sold on eBay for $376.89 on 2/21/2015.
 
Country:  United States of America (USA)
Manufacturer / Brand:  National Airphone Corp.; New York (NY)
Year: 1924/1925 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 1: WD12
Main principle TRF (Tuned-Radio-Frequency but use of regeneration unknown)
Tuned circuits 1 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Dry Batteries
Loudspeaker - For headphones or amp.
Power out
from Radiomuseum.org Model: Radiotrola Baby Grand - National Airphone Corp.; New
Material Leather / canvas / plastic - over other material
Shape Tablemodel, Box - most often with Lid (NOT slant panel).
Dimensions (WHD) 11.25 x 7.15 x 7.25 inch / 286 x 182 x 184 mm
Notes

Improved GT-1 enclosed in cabinet, provided with individual compartments for tubes, batteries and headphones.

The cabinet includes a 20-ohm Rheostat to control A+ filament supply, a 5k-ohm potentiometer to the B+ circuit to control Volume, and a switch to easily disconnect the batteries. Advertisements show use of a tipped WD-12 tube and the distinctive headband used on Dictograph headsets, such as the Dictograph R-3 3000-ohm headset shown in the photo. The battery compartment will hold one standard 1.5 volt A cell and one 22.5 volt B battery. The GT-1 is different from standard GT-1 units, with two long studs on the bottom to secure it into the cabinet. Power wires come through from under the GT-1 and connect to side posts. Aerial and ground connect to the top posts, and phones to the bottom posts, of the GT-1, as usual.

Net weight (2.2 lb = 1 kg) 1.8 kg / 3 lb 15.4 oz (3.965 lb)
Price in first year of sale 18.50 $
Source of data The Radio Dealer
Mentioned in Radio News 11/1924
Literature/Schematics (1) October 1924 The Radio Dealer magazine advertisement page 7

Model page created by Otto Frosinn. See "Data change" for further contributors.



All listed radios etc. from National Airphone Corp.; New York (NY)
Here you find 15 models, 13 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


Collection of a member from USA


  
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