Shure N44-7 cart bottom "down" issue

the thin end of the wedge
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tlscapital
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Shure N44-7 cart bottom "down" issue

Post by tlscapital » 10 Sep 2019 22:26

Been with a pair of these for a year now to occasionally DJ out and just had one of them cart bottom's end (near the connector pins) rubbing the record surface. Noticed this issue happening for the first time. Likely due to the swap from Thakker N44-7 'DJ' replacement stylus to Jico 'Club' ones. I guess that the Jico cantilevers are lower than the Thakker ones allowing this issue.

On closer inspection, I noticed that one of my Shure M44-7 cartridges had the bottom down. The 'body' is encased in the plastic top/chassis and maybe not perfectly into it... So I've managed to fiddle with some coins as spacers and mass enhancers (those 'Club' Jico replacement styluses suspension truly benefit that) to temporary counter that issue altogether as well.

Attending a bier bar where I advised them to go for those cartridges that I also provide with the Jico 'Club' replacement styluses to replace the Thakkers, they had exactly the same issue on one of their Shure M44-7 cartridge after swapping to the Jico ones. Is this a known issue ? Has anyone advices to give me as how to encase right the cartridge body into the plastic top/chassis ?

Collux
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Re: Shure N44-7 cart bottom "down" issue

Post by Collux » 10 Sep 2019 23:40

The Jico 'CLUB' Improved (& DJ) styli have a VTF recommended of 3.5-4.5g
https://www.jico-stylus.com/product/n-4 ... -improved/
The standard N44-7 is indicated as 1.5-3g
https://www.jico-stylus.com/product/n44-7/

What tracking force are you using?

tlscapital
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Re: Shure N44-7 cart bottom "down" issue

Post by tlscapital » 11 Sep 2019 05:43

Collux wrote:
10 Sep 2019 23:40
The Jico 'CLUB' Improved (& DJ) styli have a VTF recommended of 3.5-4.5g
https://www.jico-stylus.com/product/n-4 ... -improved/
The standard N44-7 is indicated as 1.5-3g
https://www.jico-stylus.com/product/n44-7/

What tracking force are you using?
The Jico 'Club' replacement styluses recommend 3.5 to 4.5 and the Thakker 'DJ' (not standard) 3 to 4.5 grams. Regardless I always use between 3.25 to 3.50 grams for good tracking.

The VTF is not the issue but the fact that this Shure M44-7 flaw was revealed through the height of the cantilevers of those Jico replacement styluses is kinda mesmerizing to me.

Still, I had in mind to squeeze tight the body of my "faulty" M44-7 cartridge into it's plastic top/chassis between a parallel vise. But maybe someone knows better...

chiz
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Re: Shure N44-7 cart bottom "down" issue

Post by chiz » 11 Sep 2019 10:18

On the 35 series the metal generator housing is attached to the plastic part with some sort of adhesive - it's likely the 44 series have the same construction.
http://i.imgur.com/wlcgUUr.jpg

tlscapital
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Re: Shure N44-7 cart bottom "down" issue

Post by tlscapital » 11 Sep 2019 11:01

chiz wrote:
11 Sep 2019 10:18
On the 35 series the metal generator housing is attached to the plastic part with some sort of adhesive - it's likely the 44 series have the same construction.
Thanks. Maybe some dismantlement before re-encasing "properly" could be performed that way...

Collux
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Re: Shure N44-7 cart bottom "down" issue

Post by Collux » 11 Sep 2019 12:13

tlscapital wrote:
11 Sep 2019 05:43
Still, I had in mind to squeeze tight the body of my "faulty" M44-7 cartridge into it's plastic top/chassis between a parallel vise.
That approach I think is a little extreme.
If the body could be hand pushed into position, I think that would be much less likely to cause harm to the body.

Could a wooden cartridge body be used to assist with the problem here?
https://tinyurl.com/y6mlkpbs

tlscapital
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Re: Shure N44-7 cart bottom "down" issue

Post by tlscapital » 11 Sep 2019 14:53

Collux wrote:
11 Sep 2019 12:13
tlscapital wrote:
11 Sep 2019 05:43
Still, I had in mind to squeeze tight the body of my "faulty" M44-7 cartridge into it's plastic top/chassis between a parallel vise.
That approach I think is a little extreme.
If the body could be hand pushed into position, I think that would be much less likely to cause harm to the body.

Could a wooden cartridge body be used to assist with the problem here?
https://tinyurl.com/y6mlkpbs
By hand I've tried but it proved rather hard and I only manage to bent in some of the alloy casing. No more harm than that hopefully. Only that little gain of half a millimeter allowed it to play without rubbing the record surface anymore.

Those wood casings are a little too fancy to my taste. And pricey. Although I believe they can sound good or different at least. Such option could be an option... Still I'd prefer to tweak some only on the original parts. Thanks for the tip.

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Re: Shure N44-7 cart bottom "down" issue

Post by BMRR » 12 Sep 2019 17:19

I had this problem with an old M44C. I removed the metal cartridge from the plastic mounting block, removed all of the old glue from the cartridge and the mounting block, then added some new glue and reinserted the cartridge into the mounting block. It's fine now.

tlscapital
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Re: Shure N44-7 cart bottom "down" issue

Post by tlscapital » 13 Sep 2019 09:50

BMRR wrote:
12 Sep 2019 17:19
I had this problem with an old M44C. I removed the metal cartridge from the plastic mounting block, removed all of the old glue from the cartridge and the mounting block, then added some new glue and reinserted the cartridge into the mounting block. It's fine now.
Got'cha ! Thanks.

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