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Technics arm mass and spec

Hi John

Thanks for posting up the formula! I confess I got lazy and just quickly scanned the graph on the HFNRR test disc sheet.... Cheat sheet!

While we're on the subject of effective mass specs...Have you seen JoshT's q on the SL1301 arm? They quote 22g including cartridge mass of 6g. Headshell is 9.5g. I thought at a glance that it was really 12g, but checked the instruction manual for the 1301 and also the EPA-100 out of curiousity and that quoted 22g as well. Is the effective arm mass really about 16g? I've never seen it specified the way Technics have done in this case. Also really surprised to see the strange geometery with the offset at 21.5degrees. They look to have applied Lofgren B to a very narrow envelope so they end up with ~3 deg error at 146mm! Crazy stuff...
Regards Anthony

"Beauty is Truth, Truth Beauty.." Keats

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