Morse Transmission Set [Single Needle Telegraph]; Siemens Brothers and Company L...
Morse Transmission Set [Single Needle Telegraph]About this object
Single needle telegraph Morse transmission set.
1. Relay on the left is made by Siemens, London.
2. Single needle indicator (centre rear) made by A.T.M. (Associated Telegraph Manufacturers), England.
3. Change-over switch (centre) duplex/single.
4. Variable resistance tank on the right.
5. Standard Morse key in the front.
The Museum of Transport and Technology (MOTAT)Object Type
The rear item is a differential galvanometer. Totally different to a single needle system.
The switch is duplex/simplex. ... Ron