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Counterweight for 2016 Planar P3

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Re: Counterweight for 2016 Planar P3

Postby fudgemaster » 12 Jul 2018 19:03

I have an Isoweight on my RB303, works fine. It did need easing a little, being a tight fit.
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Re: Counterweight for 2016 Planar P3

Postby Taperocket » 07 Aug 2018 17:57

I just acquired the Tecnoweight but am unable to install it on my Planar 3 RB330 arm. I was eventually able to get the Rega metal end stub off only to find that the Michell sub shaft won’t screw in. It seems as if the threading on the Rega arm is too small. Anyone else running into this issue? Anyone receive a response from Michell per compatibility?
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Re: Counterweight for 2016 Planar P3

Postby Troc » 07 Aug 2018 18:07

My rb330 plastic stub screwed off fairly easily and the tecnoweight one was not difficult to put on. Maybe you bent something removing the old stub? Does it screw back in ok?
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Re: Counterweight for 2016 Planar P3

Postby roncron » 07 Aug 2018 18:14

Michell wrote back to me and said their counterweight is compatible with the RB330. I then bought one and successfully installed it, including screwing the Michell end stub on to my RB330.

Unscrewing the original end stub and screwing in the Michell one were both quite hard. I wrapped the end stub in rubber and then used an adjustable wrench, which made it easy. (The rubber i used was the round 4” diameter piece they sell at kitchen stores for unscrewing a difficult lid off a jar.)

I have to say I was extremely nervous about the risk of damaging the threads inside the end of the tone arm. A new RB330 costs $600, or about 60% of the cost of my planar 3.

I was particularly nervous about screwing in the Michell end stub. It only went 1/4 turn by hand, leading me to worry that it’s threads didn’t match the tone arms threading. But other Rega owners in another forum assured me that it would work. So I used the adjustable wrench (or was it a small monkey wrench? I think so).

Then it was fairly easy. I’ve been enjoying the Michell Tecnoweight, but if I had to do it over, I might choose a Rega tungsten counterweight. It’s cheaper and trivially easy to install. No removal or replacement of end stub required.
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Re: Counterweight for 2016 Planar P3

Postby DT999 » 09 Aug 2018 06:04

fudgemaster wrote:I have an Isoweight on my RB303, works fine. It did need easing a little, being a tight fit.


I also have an Isoweight on my RB303; I had the 103g which fitted with no adjustment but then got the 130g which needed a little adjustment to fit, but they work well on the existing metal stub
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Re: Counterweight for 2016 Planar P3

Postby fudgemaster » 10 Aug 2018 19:42

Have you noticed a difference with the heavier weight, DT999?
I had to gently file the plastic sleeve if my 103g weight to get it to fit, didn't try forcing it on to the original stub.
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Re: Counterweight for 2016 Planar P3

Postby DT999 » 11 Aug 2018 07:30

fudgemaster wrote:Have you noticed a difference with the heavier weight, DT999?
I had to gently file the plastic sleeve if my 103g weight to get it to fit, didn't try forcing it on to the original stub.


Fudge master, yes I did notice a difference. I originally had the 103 on an Isostub fitted to a RB250 Which I had on an RP1. When I got the P3 the 103 counter weight fitted with no need for adjustment to the existing metal stub on the RB303. It was set a bit far back when I put a 2M bronze on, so I tried the 130g, but it didn't initially fit. I had to remove a bit of the plastic ring. I used some medium grit sandpaper rolled into a tube and just worked away until I again got a snug fit, works well now.
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