Posted by KlausR. (A ) on November 26, 2008 at 05:26:36

When talking about tone arm geometry and cartridge alignment, usually Baerwald's paper from 1941 is mentioned. However, Erik Löfgren was actually the first to publish the solution, identical to Baerwald's, in 1938 in Germany.

In the following years other solutions were proposed by Bauer 1945, Seagrave 1956, Stevenson 1966. In 1983 Graeme Dennes made an analysis of these papers and found that the different solutions are mathematically identical.

Last year Graeme asked me if Löfgren's paper had ever been translated into English. To the best of my knowledge it had not so I thought I'd give it a go. Today, exactly 70 years later, with the help of Graeme and members of the Vinyl Engine, the translation is ready and can be downloaded from the VE website.

http://www.vinylengine.com/phpBB2/viewtopic.php?t=15876

Klaus

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