WB400 and the Civil Defence

[Robin128]

http://www.ringbell.co.uk/ukwmo/Page212.htm

Can we talk about these things now?

Are they still about?

Tick, Tick, Tick....

"The WB400 receiver was powered by a six volt dry battery in the base and when correctly adjusted would emit the quiet tick of the confidence tone sent by Carrier Control Point. When a calling signal or speech message was transmitted, the volume increased automatically.

In peacetime the receiver was normally switched off and only turned on for tests. The red knob on the front is a combined On/Off and Volume control. Below that is a small pull out draw containing an instruction card. The card told the user what to do in response to a message and how to change the battery which required the removal of the base plate."

[ovenpaa]

UKWMO and HANDEL are long gone.