Show input transformer or filter sharply tuned As Is now well known the has haa seven more or less distinct parts first there Is the receiving device and tuner shown at the left of the diagram tills inputs into the first tube ali the third part Is the oscillator which ulso inputs a frequency into the fint tube the oscillator input ond the receiver input differing by a certain fixed frequency for which the group of intermediate transformers are especially tuned to avoid other frequencies creeping into the intermediate amplifier there Is placed before it an input transformer more properly called a zv ar MV daj rohe make 04 t it 11 f diagram showing the receiving dovice device tuner and oscillator otter ter for its purpose la Is to transmit through only that frequency for which the intermediate transformers are adapted to make t this input transformer or filter sharply tuned a condenser Is JI placed aced across its primary this la Is always specified as a fixed condenser usually murii 05 mid experience wit with h bria hundreds yd of t them has shown however tha t a 0 fixed condenser here ili wrong bee because ause the condensers vary the vary ury and the transformers transform era vary tills this filter determines the intermediate frequency and a variable condenser bouhl always be used and adjusted in COI combination with the oscillator cuil coll anser dealer fo gre greatest adest volume the oscillator must be varied as all yu adjust tills new condenser when the new condenser Is adjusted to ono one station it should not again be touched Us its setting is then permanent it Is important however in first getting tile the right setting to adjust the oscillator dial every time the filter condenser Is changed just as you adjust primary and secondary condensers on oil tiny any set |