The CF-270L was a 4-Band Cassette-Corder manufactured by the Sony Corporation of Japan in approximately 1976. This is a vintage radio cassette recorder, which was extremely popular and sold throughout the world. This unit is 415 mm × 257 mm × 109 mm in size and weighs 5.2 kg including batteries. The outer case is rugged with a generous amount of plastic, which is why these units continue to exist.
This radio cassette boasts a two-way speaker system, which consists of a 16 cm woofer, and a 5 cm tweeter, driven by a 3 W power amplifier that is essentially a Class AB Complimentary Symmetrical Output Stage.
The cassette part has an FG servo system, which pulls the tape extremely smoothly. You will notice this straight away when you play a cassette. The sound quality is excellent, and there are bass and treble controls, to suit every taste.
The pushbutton assembly is metal and very robust. These keys usually take a hammering and continue to operate without breaking.
In record mode, this meter will indicate the sound level of the input source. In playback mode, it behaves as a normal meter indicating the output signal level. In radio mode, it indicates the signal strength whilst tuning into a station. By pressing the switch below, the meter also indicates the battery charge level.
If you owned one of these then it will bring back some memories of your past. It is a lovely piece of vintage electronics manufactured to a reasonable standard. A good working one in its original box and manuals could fetch a packet on a good auction day.
This unit has a metal tape transport chassis, with metal components. Consequently, it is very robust and reliable. Usually it requires a good clean and lubrication. The volume controls might crackle and the sliders will require cleaning with a contact cleaner. I cleaned all the switches as well, and now it is as new from the factory.
Drive Belt 3-434-110-XX
This one was in a good condition from the outside, and only the drive belt had perished. I managed to replace it with a generic belt of the correct size and it works fine.
This Article Continues...Sony CF-270L
Sony CF-270L Inside
Sony CF-270L Tape Transport
Sony CF-270L Mechanism
Sony CF-270L Audio Circuit
Sony CF-270L Radio Circuits
Sony CF-270L Case
Sony CF-270L Power