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My refurbished Commonwealth 12C is custom rock maple plinth/stand and Schroder CB tonearm. New cartridge to come. Golden Age Audio Reference Phono 

Been a long time since I posted any new pics in this amazing thread.   After a complete ground up rebuild by SNA maestro @Shark, including an engineering masterpiece of a plinth with built-i

My Garrad 401 project is almost done . Brand new in box garrad 401 + custome made plattter/mat with sme 3012 & fr 64 fx tonearm . Some photos show how it is . Plinth is in final stage still need t

On 05/12/2020 at 5:11 AM, cafe67 said:

Hiya , hope these help you. , cart was very well setup by MarkT and I think we got the tracking force spot on. 1.8 grams I think 

 

14F556FE-C442-4CAC-B647-40B15966DF5A.jpeg

 

 

Here's a picture of mine.  Maybe a little lower but generally seems to be comparable.  I guess nothing to worry about!

 

 

 

IMG_0514.jpg

 

Edited by sktn77a
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On 07/12/2020 at 1:45 AM, sktn77a said:

 

 

Here's a picture of mine.  Maybe a little lower but generally seems to be comparable.  I guess nothing to worry about!

 

 

 

IMG_0514.jpg

 

Not being rude or silly , have you checked that your arm is running paralell to the platter? 

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Doing the normal Sunday record dig , stumbled on this technics sl-5 .... it says not working, came home plugged in , dialed into the phono stage on the devialet.. and perfect ... pristine condition..

61FD19B9-3D29-4F63-BC7D-5151FB3DD1C9.jpeg

C476D9C3-7F89-4DC8-8F2F-F1CF91204319.jpeg

8188A3B1-70B6-48B6-B742-D11CDDDDE1BF.jpeg

EB95C5F6-4EFA-4D8C-A7CF-BB2CFB359577.jpeg

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2 minutes ago, Diynamic said:

Doing the normal Sunday record dig , stumbled on this technics sl-5 .... it says not working, came home plugged in , dialed into the phono stage on the devialet.. and perfect ... pristine condition..

61FD19B9-3D29-4F63-BC7D-5151FB3DD1C9.jpeg

C476D9C3-7F89-4DC8-8F2F-F1CF91204319.jpeg

8188A3B1-70B6-48B6-B742-D11CDDDDE1BF.jpeg

EB95C5F6-4EFA-4D8C-A7CF-BB2CFB359577.jpeg

 

If it does start to play up, I may be able to help remedy. Just let me know.

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Not a issue at the moment played through a few albums .... If something does occur I’ll hit you up , thanks ..had to make a earth wire to plug into the rear . Can’t believe the deck sounds so good ... 

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  • 2 weeks later...

Just about to upgrade my SkeletaLinn with a new chassis - which was CNCed out of Delrin for me by Kev.  Thanks, Kev!  :thumb:

 

So this - top:

 

2070740185_SkeletaLinnDelrinChassis-Top.thumb.jpg.6133411e20e7b916a5b69404b243cfcb.jpg

 

and underside:

 

1137369187_SkeletaLinnDelrinChassis-Underneath.thumb.jpg.73ae4d73c146a48c4df81093cf03e87b.jpg

 

replaces this (bolted-together aluminium C-section)!:

 

327836325_SkeletaLinn005.thumb.jpg.fa0b26a8f88500001213ffd1ecac6b06.jpg

 

 

There are 2 main differences (apart from the material):

  1. the position of the bearing has been moved slightly further away from the LH spring than it is now.  This should give me equal weight distribution on the 3 springs (currently, it's about 40% on the LH spring and 30% on each of the other two springs).
  2. there are 'wings' either side of the bearing, to take the 2 motors.  Currently, the motors are mounted on brass pods - so off-board - but this requires careful measurement to position the motors correctly, each time I do any work on the TT.  In the new chassis, the motors are fixed in place - the penalty being ... motor vibrations might get to the bearing (and the platter).  I'm hoping Delrin is sufficiently self-damping for this not to be a problem.

And yes ... it is Karousel-ready!  xD

 

Andy

 

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1 hour ago, Chill3 said:

You're mounting the motors on the chassis ?

 

Sure thing!  :)

 

See here:

 

1334179676_SkeletaLinnDelrinChassis-withmotors.thumb.jpg.577edfb12328a94925d7f2a7c0a635ce.jpg

 

Yes, I know that I mounted them off-board, when I designed the SkeletaLinn, the first time around - and there's a good reason for doing this (keep motor vibrations away from the bearing).

 

But the 'Number9' motor controller that I use, has the ability to set the phase difference between the 2 pairs of motor wires to be whatever you want.  What you do is hold the motor in your hand whilst changing the value of the phase difference with your computer - you choose the value which gives you the minimum motor vibration.

 

So I'm hoping this - coupled with Delrin having a degree of self-damping - will mean that motor vibration is not an issue.  But I won't know this until I fire it up!  xD

 

Andy

 

Edited by andyr
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11 minutes ago, andyr said:

 

So I'm hoping

Andy

 

 

lot of hope riding on your implementation Andy...did you fabricate a "dummy" mount for the bearing and motors for evaluation??

All the best..

 

Tase.

Edited by Tasebass
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1 minute ago, Tasebass said:

 

lot of hope riding on your implementation Andy...

 

Hah - yes!  :)

 

1 minute ago, Tasebass said:

do you fabricate a "dummy" mount for the bearing and motors for evaluation??

All the best..

 

Tase.

 

No - I didn't see how this could be done easily.  So I went straight for the whole chassis.  Kev and I have worked out a 'Plan B', if motor vibrations turn out to be a problem.  :)

 

Note: I have a built-in "vibration measuring " facility on the SkeletaLinn.  The Number9 has the ability to send a different frequency to each AC motor - needed, in order to compensate for slight machining differences in the motor pulleys.  When calibrating the 2 motors (to give me 33 & 45), I noticed that the weight buckets on my 2 arms make an excellent 'vibration measuring tool'!  :)

 

When I have set the motors' relative speed correctly, there is no movement of the weight buckets - when it is set incorrectly ... you can see them jiggling.  So I am expecting this will tell me whether motor vibration is an issue or not, with the new chassis.

 

Andy

 

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2 hours ago, andyr said:

 

Sure thing!  :)

 

See here:

 

1334179676_SkeletaLinnDelrinChassis-withmotors.thumb.jpg.577edfb12328a94925d7f2a7c0a635ce.jpg

 

Yes, I know that I mounted them off-board, when I designed the SkeletaLinn, the first time around - and there's a good reason for doing this (keep motor vibrations away from the bearing).

 

But the 'Number9' motor controller that I use, has the ability to set the phase difference between the 2 pairs of motor wires to be whatever you want.  What you do is hold the motor in your hand whilst changing the value of the phase difference with your computer - you choose the value which gives you the minimum motor vibration.

 

So I'm hoping this - coupled with Delrin having a degree of self-damping - will mean that motor vibration is not an issue.  But I won't know this until I fire it up!  xD

 

Andy

 

Ok, hard to see the point of a suspended turntable with motors attached to the chassis, but then Rega have the motor on their  chassis with a similar advanced power supply so ........

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53 minutes ago, Chill3 said:

Ok, hard to see the point of a suspended turntable with motors attached to the chassis, but then Rega have the motor on their chassis with a similar advanced power supply so ........

 

Appreciate your PoV Chill but shirley, SME, for one, has its motor attached to the chassis?  (Sure, Linn's motor is attached to the top-plate.)

 

And I have to disagree that Rega's motor PS is as advanced as the Number9.  :)  Steve Tuckett, the Number9 designer, was Rega's largest retailer in a previous life - so he knows what Rega has.

 

Andy

 

 

 

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On 23/12/2020 at 3:23 PM, Hydrology said:

I would VERY much like this to be my next turntable - @Epiphany Audio hook me up! Can I do part trade-in of a body part or two???

 

ZEBRANO-GRANDE-MK20301-copia.thumb.jpg.80ded1473d2c1a70b61f79bf1529fb50.jpg

@Hydrology I have some good or bad new depending on your perspective - these are way more affordable (and beautiful) than post people think.

 

Happy to bring one around to the store some time if the hardcore vinyl junkies are interested in seeing one?

 

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18 hours ago, Epiphany Audio said:

@Hydrology I have some good or bad new depending on your perspective - these are way more affordable (and beautiful) than post people think.

 

Happy to bring one around to the store some time if the hardcore vinyl junkies are interested in seeing one?

 


Absolutely @Epiphany Audio ! Didn’t know you guys were in Perth. Send through a price list if you get a chance!

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On 23/12/2020 at 4:31 PM, Chill3 said:

You're mounting the motors on the chassis ?

 

An update for you.  :)

 

I explained why I thought that because I've been able to minimise motor vibrations using the facilities which the 'Number9' motor controller offers, mounting the motors on the chassis shouldn't be a problem.  But, after your post, I've re-fitted the motors - and they now have a neoprene O-ring as a washer on each bolt, between the motor 'mounting wings' and the chassis.  Which I'm thinking should act as some sort of a barrier to vibrations getting from the motors into the chassis.  :)

 

Here's a pic of the current status, with Cirkus bearing and inner platter fitted, as well as the Univector arm mount:

 

 

564039891_SkeletaLinnDelrinChassis-withinnerplatterandUnivectorbase.thumb.jpg.4f0ddd7be831cf7b0a7f709d10d58ba6.jpg

 

 

Andy

 

Edited by andyr
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On 26/12/2020 at 5:18 PM, andyr said:

 

An update for you.  :)

 

I explained why I thought that because I've been able to minimise motor vibrations using the facilities which the 'Number9' motor controller offers, mounting the motors on the chassis shouldn't be a problem.  But, after your post, I've re-fitted the motors - and they now have a neoprene O-ring as a washer on each bolt, between the motor 'mounting wings' and the chassis.  Which I'm thinking should act as some sort of a barrier to vibrations getting from the motors into the chassis.  :)

 

Here's a pic of the current status, with Cirkus bearing and inner platter fitted, as well as the Univector arm mount:

 

 

 

So where's the karousel??

Are you gonna use the Mober inner platter with the Karousel??

 

Tase

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1 minute ago, Tasebass said:

So where's the karousel??

Are you gonna use the Mober inner platter with the Karousel??

 

Tase

 

That's my intention, Tase.  (It's been working fine in my Cirkus bearing!)  :)

 

Which is why there is no Karousel atm - I'm waiting a few years until they sell it by itself.  :lol:

 

Andy

 

 

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9 minutes ago, andyr said:

 

That's my intention, Tase.  (It's been working fine in my Cirkus bearing!)  :)

 

Which is why there is no Karousel atm - I'm waiting a few years until they sell it by itself.  :lol:

 

Andy

 

 

 

.... your missing out mate.....:tongue:

Tase.

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9 minutes ago, Tasebass said:

 

.... your missing out mate.....:tongue:

Tase.

 

I know ... but as a retired gent, nowadays ... I don't have the ready supply of green that I used to have.  :(  :lol:

 

Andy

 

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  • 3 weeks later...

New arm for the sp10 mk2 this time paired with at-1010 tonearm. There is so much tweak in this arm with damping, lateral balance and gymbal balance will slowly dialling it in but after regular setup it's sounding quite great

20210116_182510.jpg

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My vintage LP12 with Grado Reference Sonata 2. Sounds rich and detailed with the top end rolled off slightly.  IMG_0242.thumb.JPG.ec45998a38ca606b1482ef77043dfc76.JPG

53A26AF6-DA9C-4CF4-968B-93F2A23ACCB1.jpeg

Edited by davidSun
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