Cosmos Amplion AR19
Electromagnetic loudspeaker, made by Alfred Graham & Company in London, for Cosmos, the trade mark of Metropolitan-Vickers (Metro-Vick).
Petal-shaped flare made of ten metal-framed segments of steam bended oak wood, black cast metal neck, nickel-plated base and 2,000 ohm drive unit. By turning the knurled screw, the distance between the magnet and the diaphragm can be changed.
The original price was 5.5.0.
Data
Serial number: B90099
DC resistance: 2000 Ohms
Diameter: 38 cm
Made in 1923
Purchased in 2005
Sold in 2023

What was broadcast in 1923?

 

Listen to "Dumbell (intro Jennie)" by Bert Ambrose and his Orchestra, recorded April 6, 1923

The driver unit

Advertisement in Experimental Wireless, October 1924

This page was last edited on 16.12.2023