Changing weight at the cart will change the effective mass of the whole arm/cart assembly and as a result, will change the resonance frequency as well. So the best way to determine if more weights are needed is to run through resonance test, both lateral and vertical, using a test record like the Hi-Fi News Analogue Test LP.
Cartridge too light for counterweight?
I just purchased a Pro-ject 6 Perspex, and finally managed to get it up and running (no thanks to the horrible manual).
It came with two counterweights, the lightest one rated for 8-~ gram cartridges. The cartridge I got (Audio Technica AT33EV) only weighed 6.9 grams, but I was still able to balance the arm out with the light counterweight, and then had no problems dialing in 20 on the downforce scale (cart says 2.0g for recommended downforce).
After completing all the adjustments, I noticed a small bag containing a small weight (that I measured at 2 grams). It will fit over (or under) the cartridge mounting point on the arm.
Is there any point in adding this to bring the weight up, or is this just for cases where it is impossible to attain balance and then dial in the proper downforce using the supplied counterweights.
It came with two counterweights, the lightest one rated for 8-~ gram cartridges. The cartridge I got (Audio Technica AT33EV) only weighed 6.9 grams, but I was still able to balance the arm out with the light counterweight, and then had no problems dialing in 20 on the downforce scale (cart says 2.0g for recommended downforce).
After completing all the adjustments, I noticed a small bag containing a small weight (that I measured at 2 grams). It will fit over (or under) the cartridge mounting point on the arm.
Is there any point in adding this to bring the weight up, or is this just for cases where it is impossible to attain balance and then dial in the proper downforce using the supplied counterweights.
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- 9 posts total