Sony WM-D3 feature
WML ID #33
Manufacturer Sony
Model WM-D3
Year 1985
Made in Japan
Technical details, specifications
Battery 2AA
Dimensions 125.4*37.3*82.3 mm (385 cm³) 3D size
Weight 370 gr
Window yes
House frame metal
Carry Case
Head Amorphous
Drive Disc drive capsan servo
Tape selector Manual switch
Waterproof no
Speaker no
Frequency range 40-16000@1 Hz
FMax output 20*2 mW
DC in yes
Record by input yes
Anti rolling yes
Noise reduction Dolby B NR
Indicator led

The WM-D3 was the smaller of the two Walkman Professional recording models, the other being the WM-D6.

The WM-D3 was the smaller of the two Walkman Professional recording models, the other being the WM-D6/WM-D6C. It was based around the same mechanicals as the WM-DD, and so had the same familiar layout of controls. An unfamiliar addition though was the pause control, which had a sliding action. This worked by switching off the motor, so introduced no extra mechanical complexity. The extra bulk of the high quality recording circuits made the WM-D3 slightly larger than the other WM-2 derivatives, with the recording preamplifiers being housed in an extra section of casing at one end. Unlike most of these models, the tape transport keys were part of the outer casework. For convenient desktop use, rubber feet were fitted to the four corners of the cassette door so that the machine could be placed “upside down” and operated without the need for a second hand to hold it steady. All the text and symbols were printed to be the correct way up when the machine was used this way.

What elevated the WM-D3 into the Professional range, above the level of the WM-R202 and others, was its ability to make recordings using Dolby NR and using either normal or chrome tape. Usually recording Walkmans could make basic recordings on ferric tape only, despite having playback facilities for a full range of recordings. Recording on chrome tape requires a lot more power than can be used of normal types, for both bias and erase. Because of this, the WM-D3 used a complex AC bias circuit and a double-gap ferrite erase head, the latter as an alternative to the hinged permanent magnet usually found on simpler Sony recorders. The WM-D3 was not quite as versatile as the WM-D6/WM-D6C, for it could not record on metal tape, nor did it offer Dolby C NR. Also absent when compared to these larger, more expensive models was the quartz locked capstan servo and variable playback speed control.

The WM-D3 offered a range of connections for external equipment, including line out, line in/microphone (switched by an attenuator) with plug-in power, stereo headphones and external 3V supply. The line out socket worked for playback only, so the WM-D3 could not be used in a “tape loop” with a hi-fi amplifier, as would be possible with a full size tape deck. A small stereo microphone was included with each machine. Recording level control was manual only, and to aid accurate adjustment a five segment LED level indicator was fitted, just like that of the larger professional models. This could also be set to show battery strength (using all five segments, an improvement over the arrangement fitted to the WM-D6) or switched off completely to conserve battery power.

The WM-D3 completed the Sony range of professional cassette models nicely, and was well respected for offering true hi-fi performance in the smallest possible size.
Via walkmancentral

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Created 2021-07-10 18:46:34
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befresh @ 2022-12-28 09:12:43

This is also a DD walkman, maybe add it to that category as well?

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