WM-AF64

WML ID #269

Manufacturer: Sony

Model: WM-AF64

Year: 1988

Made in: Japan

Technical details, specifications

Battery: 2AA

Battery life: 8h (with 2)

Colors: black gray (matte)

Dimensions: 116.1*39.1*37.4 mm (170 cm³)3D size

Weight: 245 gr

Window: yes

Frame: plastic

Case: plastic

Carry: clip

Expandable: no

External compartment: no

Tape selector: Manual switch

Waterproof: no

Speaker: no

Frequency range: 30-15000 Hz

FMax output: 2x20 mW

Functions

DC in: yes

Record by input: no

Record by int mic: no

Hotline mode: no

Cue: no

Balance (L/R): no

Phone type: 2

Equalizer: no

Auto volume no

Auto reverse: yes

Anti rolling: no

AMS no

Blank skip no

Logic control: no

Hold lock: no

Bass: so-megabass

Noise reduction: Dolby B NR

Radio: yes

Radio tuner: manual

Radio bands: fm,am

Remote control: no

Wireless headphone: no

Indicator: led

Description

3 analog FM presets.

The WM-AF64/WM-BF64 was a radio cassette player Walkman manufactured in 1988 by the Sony Corporation of Japan. It was similar looking to the WM-AF67 recording walkman, which had an additional record button.
There was also the WM-AF64, which was gray in colour and available for the US and Canadian markets, whilst the WM-BF64 was black and for the UK and European markets. This Walkman had the same transport mechanism (MF-WM69-80) as the WM-F59, and WM-F69 models.

The radio design uses the TA7787F IC, which contains the FM/AM IF, detection, and oscillator circuitry. It works in conjunction with the TA7370F IC, which is the FM multiplex, and AM amplifier. The chipset was widely used during the late 80s and the Toshiba Corporation of Japan manufactured both ICs. Interestingly, the radio does not use a variable capacitor for tuning, because it would have been too bulky to fit under the cassette compartment lid. Instead, they use a variable resistor and varactor-type tuning circuitry. They also managed to provide three radio presets located within the cassette compartment under the cassette lid.

The headphone cord also doubles as an FM aerial, and therefore if you are using other non-supplied headphones, it may affect the performance of the FM radio.Via Peter Vis (edited)