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Does the cart 'bottom out' independently of VTF or something?
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S-shaped arms tend to be medium to high mass, and straight arms low to medium. The lower the recommended tracking force of the stylus, the higher the compliance usually and vice versa. Knowing this you would try to mate higher compliance cartridges with low mass arms and low compliance with higher mass arms. What turntable and what cartridge is it?Incidentally you can estimate the arm mass with one of those digital pocket scales they sell cheap on ebay. Just remove the counterweight and the stylus. And set the front of the cartridge down on the scale. Then subtract the weight of the cartridge without stylus. It's not exact but close enough to give you an idea of the mass category and even a number to plug into the resonance formula.
I am not certain if this will answer your question, however, if you know the weight of your cartridge/tonearm and the compliance of your cartridge, you can calculate the resonance frequency of your set-up. The link below, to the van den Hul website, will provide the information you need. Scroll to the very bottom of the page (to the colour graph) and just read the result. The ideal resonance frequency (according to VDH) is 10 Hz.
before you bother to align it. This will at least let you know if it is in the arms usable range. If so, then give it a listen or check the cartridge database.
Mount the cartridge in the tonearm and measure the resonance frequency with a test record. The HRNRR test record is not very good for this, but the Shure Audio Obstacle Course V-15 Type V contains accurate resonance measuring frequencies.Good luck,
John Elison
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