Sony CF-270L

Sony CF-270L

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.


Tweeter

Tweeter

Pushbuttons

Pushbuttons

The pushbutton assembly is metal and very robust. These keys usually take a hammering and continue to operate without breaking.

Meter

Meter

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.

Volume Control


Woofer

Speaker Grille

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.

Servicing

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