Philips 852 is a tuner, turntable with an amplifier which is manufactured by Philips around 1975 - 1977. The tuner stage of this receiver consists of 4 bands such as LW, MW, SW, and FM. This unit also comes with dual-speed (33⅓, 45 RPM) belt driven turntable. The power amplifier of this unit is delivering 2 × 9W audio output power with a pair of 4Ω speakers. The 852 which we got had problems in power amplifier and turntable mechanism. After tracing the problems in power amplifier, we figure out that both BD262 transistors had short circuits between emitter and collector terminals. Because BD262 is no longer available in the market we replace both NPN and PNP transistor pairs of this amplifier with BD678 and BD679. Philips 852 player after cleanup and restoration. The turntable mechanism of our 852 had many problems due to several missing/damaged parts. Most of the parts are damaged due to corrosion and we fabricate most of them using 3D printer and lathe. The missing anti-ska...
This blog contains electronic, amateur radio, and embedded system projects, which I did during my free time. Unless otherwise noted, all the articles and projects described on this blog are based on my original designs.