Non-Fiction Books:

Operation of the Modulator Tube in Radio Telephone Sets (Classic Reprint)



Customer rating

Click to share your rating 0 ratings (0.0/5.0 average) Thanks for your vote!

Share this product

Operation of the Modulator Tube in Radio Telephone Sets (Classic Reprint) by E S Purington
20% off
$18.99 was $23.99
or 4 payments of $4.75 with Learn more
In stock with supplier

The item is brand new and in-stock in with one of our preferred suppliers. The item will ship from the Mighty Ape warehouse within the timeframe shown below.

Usually ships within 10-14 days


Delivering to:

Estimated arrival:

  • Around 14-20 February using Express Delivery
    Mighty Ape can deliver this product within 1-2 business days (usually overnight) to urban centres across Australia, and some remote areas. Learn more
  • Around 15-22 February using standard courier delivery


Excerpt from Operation of the Modulator Tube in Radio Telephone Sets The function of a modulating device in radio communication is to vary the output current of a radio generator at a frequency or at frequencies lower than the radio frequency involved. In' a certain sense practically all radio communication using single wave-length signals is by a modulation method. In continuous wave transmission, the keying by which the signals are conveyed constitutes a dot-and-dash modulation of the antenna current. In the operation of spark and other tone transmitters, the radio frequency wave trains are sent out at more or less regular inter vals at an audio frequency, so that an audible note is heard upon rectification with a detecting device. In addition to this audio modulation, a second order of dot-and - dash modulation is required for conveying the telegraph signal. In radio telephony the mes sage which is conveyed depends upon the first order modulation itself. The antenna current is made to vary, not at a single tone frequency, but with frequencies and in degrees corresponding 'to the pitches and intensities of the sound waves produced by the voice of the speaker. In consequence, upon rectification of the received radio signals, there are produced in the receiving tele phones electrical currents which are of precisely the same nature as would be produced by communication by wire telephony. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Release date Australia
October 13th, 2016
Country of Publication
United States
, black & white illustrations
Forgotten Books
Product ID

Customer reviews

Nobody has reviewed this product yet. You could be the first!

Write a Review

Marketplace listings

There are no Marketplace listings available for this product currently.
Already own it? Create a free listing and pay just 9% commission when it sells!

Sell Yours Here

Help & options

  • If you think we've made a mistake or omitted details, please send us your feedback. Send Feedback
  • If you have a question or problem with this product, visit our Help section. Get Help
  • Seen a lower price for this product elsewhere? We'll do our best to beat it. Request a better price
Filed under...