V. Arkhangelsky. Portable transistor radio • P. Tkachev. High-quality amplifier • V. Nosov. Receiver with stretched ranges • K. Aladagov. Electronic oscilloscope • L. Afanasyev. Hitchhiking for photodiode tape recorders • V. Shcherbinin. Device for automatic control of a tape recorder • V. Salnikov. Set-top box for receiving VHF-FM broadcasting stations • B. Kokachev. Push-button switch for household tape recorder • C. Ovcharenko. Magnetoelectric adapter to the guitar • E. Borovkov. Transistor generator of a single rectangular pulse • V. Karev. Brake for tape recorder • E. Borovkov. Calculation of inductance coils with carbonyl armor cores of SB-a type • D. Yezhov. Electric knife