Show R F amplification to give volume and tone radio frequency amplification Is accomplished complis hed by the use usa of additional transformers preceding the detector tills this will amplify the radio frequency sl signals nals to a value great enough to faithfully actuate tile lie detector there by riving giving greater volume all and clarity in the audio amp amplifier lIfler two stages of radio frequency amplification will generally be found to be sufficient clent and in very carefully designed receivers even one stage will bb b 0 found to le be enough |