My region: Россия
My cart руб.

Yakobi’s Pointer Telegraph

Published 01.04.2011 Presenter Anton Pankratov

Yakobi's Pointer Telegraph

The first telegraph devices created in 1830-s used magnetic pointers controlled by the power signals coming from the transmitter to show the coded character in the receiver. But these devices were not widely popularized. Their main problem was the complexity of decryption ...