FREQUENCIES


Home


Wireless (pre-1920) Radios


Marconi Wireless (pre-1920) Sets


Tubes & Valves


Crystal Set Radios


Antique Radios (1920s)


Antique Radios (1930-1960s)


Antique Radio Advertising


Radio Speakers & Microphones


Articles on Antique Radio I Have Written


Wanted Radios


Tubes for sale


Tube Amplifiers


Defeating Depression book by Howard Stone


Interview of Howard Stone on Tube Talk Classic Radio Show


Early Books and Literature on Radio, Tubes, & Electricity


Contact Me


American Marconi 112 Wireless Radio Receiver
The American Marconi 112 Wireless Radio Receiver first came into production in about 1915. It was made for use with the Marconi one-quarter kilowatt cargo transmitter. Its circuitry is similar to the Marconi 101. It uses a carborundum rectifier for detecting signals. On the top right of the front panel are a buzzer and push button switch. The buzzer was used to help the operator adjust the detector. After the detector was adjusted so it was functioning well, then the radio could be tuned to a station.
A detailed description of the 112 including pictures and a schematic are found in Elmer Bucher's Practical Wireless Telegraphy published in 1917 in New York by Wireless Press. See pages 174 to 178. A copy of one of the pictures in Bucher's book is below.




Unless otherwise noted, all materials contained on this web site are copyright protected. Materials may be downloaded and/or reprinted for personal use only. Permission to reprint or electronically reproduce any document or graphic in whole or in part for any non-personal or commercial use is expressly prohibited unless prior written consent is obtained from the respective copyright holder(s).

Copyright 2003-2004 Howard Stone PhD.
stonevintageradio@gmail.com