Show allow liberal spacing when laying out a set when laying out a radio set liberal spacing should be allowed between the lie units there should be at least I 1 inches between tubes and amplifying transformers this will leave about a six inch separation between the tubes center to center all wires should be as short and direct as possible especially those leading to the grid and to the he plates the return leads in the grid circuit of each amplifier tube should run from the transformer secondary to the negative terminal of the A battery this method of connection places a negative bias on the grid due to a drop in voltage in the resistance of the rheostat this alila permits the use of higher plate volt afee which results in better amplification without the use of 0 batteries connecting the cores of the audio amplifying transformers to the ground binding post or negative terminal of the A battery will help to minimize howls and increase signal strength the effectiveness of this scheme depends upon the type of transformers the circuit generally gives more satisfactory results if the first amplifying transformer has a higher ratio than that of the second amplifying transformer jacks can be used in an audio amplifier circuit go 60 that the detector can be used alone 0 or r the detector and one staga it li is not a good plan to employ jacks to in a radio frequency circuit |