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"Zamag" was a bad alloy used in 60thies Tape-recorders

Ernst Erb Jürgen Stichling Bernhard Nagel 
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Forum » Radios and other type of sets (Physics) etc. » Other sets and related gear » "Zamag" was a bad alloy used in 60thies Tape-recorders
Mario Coelho
Mario Coelho
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06.Nov.03 02:53

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I own one Grundig 23K and one Nordmende Titan. They are  tape-recorders  60thies made .
Both presented mechanical failure.
The first one had a "Zamag" transmission wheel completly broken.
The second one had a capstan base support  made of "Zamag" deformed and cracked.
 "Zamag" is an  alloy (Zn,Mg). It was a bad product. My experience tells me these alloy deforms continually and deteriorates changing the original dimensions. After some years It look likes cracked dry soil.
 Is normal the occurrence of bad performance of the components wich cracks between 20 to 30 years.
Mário Coelho