Meter safety
While building a transmitter recently, a problem arose concerning the method to be used in protecting exposed meter terminals. The solution finally evolved from the use of a pair of ceramic plate caps is shown in the accompanying photograph. Most meters of the 2½ inch variety or larger come with a pair of washers on the terminals. When the terminal nuts are tightened down on the washers, Millen No. 36002 or National SPP-3, 3/8 inch plate caps should slide over the washers, forming a tight connecton. If these fit too loosely, perhaps a modification of Millen 36004 will serve better.
Of course, before the caps are placed on, the leads for the meter should be soldered to the cap connections.
Plate caps used to protect exposed meter terminals.
A. Gordon Davis, KN1LY.