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I need a heavier counterweight for my Rega RB300 tonearm. It currently has the smaller diameter tungsten counterweight, but it sits too close to the end of the stub-shaft when balancing my Audio Technica AT20SLa. I am looking for a heavier counterweight, but I need a reference point to work from. Can anyone tell me the weight of the smaller tungsten counterweight? Thanks.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
Follow Ups:
I found a nice deal on Canuck Audio Mart for a 110 gram offset counterweight that worked great. I bought it on the weekend and it arrived this afternoon from the Atlantic Coast. Thanks for everyone's input.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
Many moons ago I had a Kenwood DD which replaced my Dual 12xx........
I put an ORTOFON on it after being grossly disappointed with either Pickering OR Sure. including the 12$ Grado which got terrific reviews.
New cart was in the Low Mass series and I could NOT get a balance with the stock counterweight even when moved to either extreme. The cart CAME with a much smaller counterweight which worked the charm and I was able to get a satisfactory tracking weigh using a scale.
WOW! Night And Day......I'll bet I reduced tonearm total mass at least 20% if not more.
I may still have that cart in its case somewhere out in the garage?
Too much is never enough
We have learned a lot since then. I used to have an Infinity Black Widow tonearm that I loved at the time. It is long gone, and I don't miss it a bit.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
you find a heavier c'weight?
Underslung is good ... but looks like there's almost 1/2" of the c'weight stub showing in front of your weight - and the best SQ (from minimising the c'weight's inertia) comes from having the c'weight as close to the pivot point as possible.
Andy
It is better now, but I will keep looking for a 120 gram weight. I had a Clearaudio Turbo Weight at one time, but I sold it and immediately regretted that.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
Glad to hear it. For me, sonic changes were negligible but at least I was able to again close the lid while playing a record. As you know there is very little clearance even when using Rega's own cartridges. Looking up the weight of the AT20SLa you're using revealed that it is only slightly lighter than the ART, yet your 110 gram counterweight is still further back than mine. The Incognito wiring must weigh significantly more than stock, the RB-series has been reduced in mass, or a combination thereof.
Edits: 09/16/20
Even now it is impossible to set the stylus force with the spring set to maximum, so the Incognito wiring must be heavier.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
or O-rings. It damps the vibrations as well.
100 grams it is.
The ones I see most often are 120 grams, so one of them should be fine. Thanks for the reply.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
100 grams is the weight of the stock tungsten counterweight of my RB2000. My cartridge weighs in @ 8.5 grams and the counterweight is positioned about 1/2 way up the stub to balance the arm, after which I use the spring to set the tracking weight. A 120 gram counterweight should work for you if it is now at the end of the stub.
.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
As long as the counterweight is tightly attached to the tonearm, it should be just fine. The only thing you will gain by using a heavier counterweight is a very sightly lower effective mass. The most important thing is that counterweight must be tightly attached to the tonearm.
Best regards,
John Elison
I am not happy that some of the counterweight hangs off the end of the stub, so I don't think it is gripping very well.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
Are you using the spring to set tracking weight? Your cartridge weighs similar to mine (also an Audio Technica,) so that is approximately where my counterweight would be positioned had I completely disengaged the spring.
I zero-balanced using the counterweight, then dialed in the tracking force. I then used a digital stylus force gauge to verify that it was actually 1 3/4 grams. The tonearm has an Incognito wiring upgrade, so that might have changed the tonearm weight somewhat.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
Edits: 09/12/20
The aftermarket dropped counterweight I'm using is slightly higher in weight (103 grams) than the stock tungsten. I set the tracking force (the same as yours) using the spring, verified with a gram scale.
Edits: 09/12/20
I just ordered a 110 gram offset counterweight similar to yours on Canuck Audio Mart. I hope that does the trick.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
No Kitchen Scales?: even my cheapo plasticy version registered 100gram (for the original 1983ish RB300 -£90):- which also is the current quoted small Tungsten weight..
see:-
Besides, even though we have used the metric system for several decades, we still cook in ounces. Thanks for the link.
Sorry, Donald, there just isn't enough of Mount Rushmore left to carve that bowl of mashed potatoes on your head, but maybe we could get them to do your tiny hands.
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