RSM Vol 27 - How To Align All-Wave Superheterodynes

This technical manual from the National Radio Institute provides a comprehensive guide for servicing and aligning all-wave superheterodyne receivers. The text outlines a standardized procedure that begins with the I.F. stages before moving to the preselector and oscillator adjustments. It details how to use signal generators and output meters to calibrate different radio bands, emphasizing the importance of following a specific order when dealing with series-connected coils. The source also addresses complex scenarios, such as repairing units with automatic frequency control or those that have been improperly adjusted by amateurs. By including diagrams and practical exercises, the booklet aims to train technicians to maximize a radio's sensitivity and selectivity through precise hardware tuning.