Other collecting activities?

From: ben franchuk <bfranchuk_at_jetnet.ab.ca>
Date: Sat Apr 17 12:35:34 2004

>> A porcelain knife switch, used for disconnecting an aerial from a
>> radio receiver. The two centre terminals of the switch are
>> connected to the radio and the two left-hand terminals go to the
>> antenna. Finally, the two terminals on the right are earthed. The
>> switch incorporates two spark-gaps which are intended to prevent
>> lightning from damaging the radio. But the real protective measure
>> is to switch the handle over to the earthed position whenever the
>> radio is not in use. This connects the aerial directly to earth,
>> and disconnects it from the radio.
That is a darn good idea.

Often used in reverse for bringing 'Monsters' to life. :)
Received on Sat Apr 17 2004 - 12:35:34 BST