Ross Mark-55

Used Google translator

     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.

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User manual tape Ross Mark-55

Advertising in catalog "Burstein-Applebee" for August 1967