V. Veryutin. Improvement of the capacitor ignition system • B. Tailor. Demonstration oscilloscope • C. Sviridov. RBM - amateur transceiver • A. Kuznetsov. Automatic telegraph message sensor • B. Rodchenkov. Amplifier LF • V. Bikmulin. Tape reverberator • A. Liepins, J. Siksna. Nonlinear distortion meter • B. Volkov, Attachment for testing quartz resonators • E. Nechay, B. Kubiv, V. Paliy. Improved color block for TVs "Rubin-401-1" and "Electron-701"