WM-DD3DDIII

Sony WM-DD3 feature
WML ID #109
Manufacturer
Sony
Model
WM-DD3
Nick
DDIII
Series
DD
Year
1989
Made in
Japan
Initial price
270 DM
Technical details, specifications
Battery
2AA
Battery life
9 h
Colors
black red gray
Dimensions
79.7*110*32.8 mm (288 cm³)3D size
Weight
290 gr
Window
yes
Frame
plastic
Case
metal
Carry
pouch
Expandable
no
External compartment
no
Drive
DirectDrive, Quarz capstan servo
Tape selector
Manual switch
Waterproof
no
Speaker
no
Frequency range
40-15000 Hz
FMax output
2x20 mW
Functions
DC in
yes
Record by input
no
Record by int mic
no
Hotline mode
yes
Cue
no
Balance (L/R)
no
Phone type
3
Equalizer
no
Auto volume no
Auto reverse
no
Anti rolling
yes
AMS no
Blank skip no
Logic control
no
Hold lock
no
Noise reduction
Dolby B NR
Radio
no
Remote control
no
Wireless headphone
no
Indicator
led
Description

Added a quartz-locked action to the DD motor, giving absolute speed stability.

The WM-DD3 was in simple terms a development of the DD-100 according to the service manual. The DD-100 uses the WM-DD2 main PCB and an additional daughterboard for DOL bass expansion, which is conspicuously missing from the DD3. It would skip one generation and appear in the successor, the WM-DD30.

Building on the strengths of the previous model it added a quartz-locked action to the DD motor (from WM-DC2), giving absolute speed stability under all operating conditions. A similar system had been used in the WM-D6 but the WM-DD3 was the first playback-only model to use it.

Unlike the WM-D6 the WM-DD3 did not offer the facility to defeat the quartz lock and trim the playback speed manually, instead the circuit was permanently active and fully automatic in action.

Quartz lock aside the WM-DD3 was nearly identical to the DD-100 / WM-DD2, including the provision of Dolby B NR and compatibility for all tape types. As mentioned above, the next model in the development of the series was the WM-DD30.Via walkmancentral (edited)

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Additional notes
W&F: 0.13% (DIN), 0.08% (WRMS)
Created
2021-08-18 16:13:04
Updated
2024-02-18 21:07:24
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WM-DD2 WM-DD30
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