Battery Isolation

Radio Record, Volume II, Issue 36, 22 March 1929, Page 30

Battery Isolation

Avoiding Leakage "THERE are many users of wireless sets who religiously isolate their A and B batteries by disconnecting the leads to the set, either at the receiver or battery end, each time the set is to be switched off. They prefer this to an ordinary push-pull switch on the front of the panel, stating that they have experienced trouble in the earlier days as the result of leakage inside the set. \ It is not deemed advisable to afscuss the pros and cons of the procadure here, but rather to show how this ‘Ssolation" idea can be put into operation in an efficient manner, and gives, in addition, the advantage that all connections-A, B, and © (if the lastnamed is used outside the set)-are broken at the same time with extrem rapidity. uv Instead of mounting terminals o the strip of ebonite generally provided for that purpose at the back of the cabinet, fix into the hole positions small panel-mounting sockets, and make the receiver connections for the batteries to the soldering tags at the back of the sockets. The number of sockets required will depend, naturally, upon the number of battery points brought out. As far as the battery leads themselves are concerned, they must be taken to an ebonite strip half an inch wide and a quarter of an inch thick, and whose length is governed by the number of terminals it replaces. . On this piece of ebonite must be mounted a number of plugs, the holes being drilled so that they coincide exactly with the socket positions. Connected to the nuts and screws at the back of these plugs we have the various battery leads, either arranged in the form of separate leads or as a multi-way battery cord, whichever fancy dictates. The strip holding the leads and plugs can be withdrawn bodily from the sockets when the set is finished with, and the set is then completcly isolated, and by using good quality ebonite for the strip there is no ae hood of any leakage taking place h¢tween the respective plugs. The ide works admirably in practice. can ena ocelot tane NSTI