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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.
ahochan
mofimadness's avatar
mofimadness
4,992 posts
 
Ahochan, sorry, I read your post wrong. You are correct with adding the extra weight, it would indeed move the counterweight back not forward.

"Also make sure with the weights at the cart end that you accomadated the VTA for the extra mounting height."

This means if you did use the 2 gram weight it goes between the cartridge and headshell and would add some height difference that would need to be adjusted at the arm base, (VTA).

Sounds like you are up and running very well.
theo's avatar
theo
2,690 posts
 
In addition to MoFi's reply and to answer your question. VTA is Vertical Tracking Angle which is the relation of the centerline of the stylus to the groove plane. You can do a little research and experimentaion for your particular situation. But in short the angle can either enhance or muddy the bass line and at the same time effect the rest of the bandwidth. I have always felt that getting the bass as tight and acurate was the first priority. The rest falls into place. But fo now let your cartridge break in before you agonize over it too much.
sidssp
1,077 posts
 
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.
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ahochan OP
10 posts
 
About the "Hi-Fi News Analogue Test LP." The description says it comes with an alignment protractor. Is this just a simple paper one, or a more fancy one?

Does anybody have experience with this for a pro-ject table:
http://www.elusivedisc.com/prodinfo.asp?number=ACOFPRO
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