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Original Message
RE: Jelco SA-750L 12" tonearm.
Posted by blake on November 27, 2009 at 14:31:05:
I don't think you'll find it anywhere online. You'd probably have to contact Jelco. Mass of the 750D is 18 so I would expect effective mass on the 750L to be in the 20-22 range, possibly a bit more.
I could be mistaken, but I don't believe you will need the optional heavier counterweight to balance a stock 103R. If you add a heavier body (wood or aluminum) that takes the cartridge beyond 14 grams in total weight, that might necessitate the heavier counterweight.
I do use the heavier counterweight (my wood bodied 103R is about 12 grams and I have another in for a retip that weighs a bit more and also intend to use an additional 3 gram weight at the headshell-I also use a custom headshell which is a bit heavier than the stock Jelco) and it is very close to the pivot point with the cartridge weighing 12 grams.
If you can accomodate a 12" arm it would be a great way to go IMO.