British Acoustic Films

• 

  Manual For The Operation Of The A/N Type 7570 35mm Portable Projector For Use In Shore Establishments

  Manual for the British Acoustic Films A/N type 7570 film projector.

• 

  BT-H / Rank – Theoretical Circuit Of Fader Amplifier and S.20. Power Amplifier

  A circuit diagram for the S.20. Power Amplifier and Fader Amplifier. Originally marked British Acoustic Films but later Rank Precision Industries.