Ross Mark-55
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Ross
Mark-55. Portable tape recorder - a toy.
Produced in Japan in the early 60s. Dimensions 265 x 90
x 60 mm. Weight of 0.8 kg. Motor power 3 v, two
batteries type UM-2, the power wiring 9 v, battery type
PP-3. Plastic housing. Kinematics of simple, one engine
speed without stabilization. The engine is positioned
horizontally between the cassette holder and the shaft
protruding from both sides of the engine rotates through
intermediate rubber rollers from one reel tables. Coils
75 mm (3 inches) to accommodate a tape 10 - 20 minutes
of operation, depending on the set speed. The speed
controller is at the top of the belt between the coils.
Wiring diagram compiled by 5 transistors 2SB75 (3 pieces),
2SB77 (2 units), and one transformer. Connectors for
external devices are not available. Speaker recording
microphone functions. It is removable, has a long wire,
and stored in the recess to the right of the coils. The
volume control and the mode switch to the left of the
coils. Mode switch has 4 positions, - REC, PLAY, STOP,
RWD (rewind). Instead erase head uses a permanent magnet.
Despite the simplicity of the design, the recorder makes
a good impression, and the appearance and quality of the
work.
The unit has been to me in good working condition, in
original packaging, with a set of rare batteries and
instruction manual.
Photos
can be enlarged
User manual tape Ross Mark-55
Advertising
in catalog
"Burstein-Applebee" for
August 1967
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