Devised, researched
 and written
  Peter King Smith BSc

                                                         The mid-1960s, German-built multi-track tape recorder with FM/AM/SW radio

Common Faults

Poor traction between mechanical interfaces

Cause: Poor traction can result in two moving interfaces 'slipping'. For example, the rubber rim-drive wheel can become so worn and smooth during years of use, that it sometimes loses full contact with the (lower) rim of the tape drum, and slips. This could lead to a loss in sound quality during recording or playing back.

Remedy: If necessary, a freezing agent can be sprayed onto the (disassembled) rubber drive wheel, and then sanded a little with fine emery/abrasive paper. This will provide the necessary 'key' on the side the drive wheel that comes into contact with the rim of the tape drum, and should improve the contact between the two revolving surfaces. This procedure must be carried out with the utmost care, otherwise the drive wheel can be damaged beyond repair, and a replacement wheel will be required (obtainable only from existing music centers being used solely for component supply).