Show bypass by pass condensers an aid to radio receiver there are arc a number of places in n receiver where bypass by pass condensers should be used to help bell improve its operation bypass by pass or blocking condensers keep the radio frequency currents in ili the part of the circuit where they belong if the radio frequency or high frequency current strays into the audio frequency or low frequency part of the circuit you will get howls and noises and generally poor performance for fon mance nance from your set in fact if very much much radio frequency gets through gli to the audio you may not be able to operate tile receiver at all bypass by pass condensers should be used across any part that has a high resistance si or impedance Impe dence to provide nn an easy path for the radio frequency current A bypass by pass condenser should always bo be provided across the A and ill n batteries when the batteries tire arc new the resistance la 19 not extremely high but after they have been in use tor for some time tills resistance si rises rapidly and some means must be provided to counteract tills effect A fairly large capacity capacc ty must ie he used from one half to two mad the larger thi the better connect tile the condenser between the 45 volt plus plug and the negative filament and between the 00 90 volt plus and the negative filament even with a new battery these condensers will improve reception but their effect will be particularly noticeable with batteries that have been used a short alion time use good quality condensers and make sure they are not leaking to test for leakage connect a 00 volt battery across lacross the condenser for a few seconds then after setting aside tor for about 15 minutes touch tile condenser contacts with it a pair of phone tips it if there Is no click heard in phones then the lie condenser Is leaking if however you hear a click it Is 0 K X the next place a blocking condenser should be tried Is across tile the primaries of the audio transformers transform era very often a small amount of radio I 1 frequency current will get through from the detector and will pass through the primary of the trims arlins former unless tin nn easier path Is provided for it A condenser of from to 01 should be used the best value will be found by trying various capacities |