Show overloading with high voltage causes trouble in these days of high voltages and ana A 0 current L apply units the disabling of loud sab speakers through overloading the tha sensitive high resistance cells of tile tho magnet it hf becoming lamentably ment ably prevalent the best loud speaker speakers eris Is constructed to stand a load of 12 or slightly more without any III effects but it tins has been found thal thai ft where here over volts are used on the plates of the output tubes phe load to which they ore are subjected Is often as aa high ns as 20 or more milliamperes it Is difficult to add to the rated capacity p of tho the delicate filaments of the speaker unit without sacrificing much in general effectiveness on norm normal at loads lends for this reason we have to look outside the speaker tor for a remt dy for this heavy overload fortunately a number r of cespon responsible manufacturers have realized the need for an accessory which would remedy this evil and tire are pro producing ducin a new device known as an output transformer which when connected across acro ss the output of the receiver cuts off the direct current from the delicate sp speaker eaker windings allowing tile audio frequencies to pass u junob job strutted ted the use of tills this device as a proven pi even tive live rather than as a cure by tile tho many listeners using over 1 ISO X 55 volts on the plates platea of their amplifiers will prevent tile the disabling of numberless loud speakers through demagnetization short circuiting and burning out of magnet colls coils in addition they will prevent the alie less disastrous choking s so 0 prevalent in slightly overloaded units and ana lessen the drain on the ir supply through the high hilgh resistance of the magnet windings |