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Thorens TP60 (headshell) gauge dimensions

If only we knew the distance from the headshell front edge to the stylus tip a simple gage could easily be made. I just cannot get that dimension from the drawings.

Yes I agree, that gesture from ericosonic was the AK I remember.

Thank you Nines for a very helpful thread here on the Turntable forum.
 
Old_Tech said:
If only we knew the distance from the headshell front edge to the stylus tip a simple gage could easily be made. I just cannot get that dimension from the drawings.

Yes I agree, that gesture from ericosonic was the AK I remember.

Thank you Nines for a very helpful thread here on the Turntable forum.
Click to expand...


But we do.....I mention it on the previous page:

the_nines said:
Got it... really simple (I think).

When you put the headshell flat on its back up against a wall with stylus pointing to the sky, the stylus is supposed to be at a height of 25mm and 10mm from the wall.

Make sense ??
Click to expand...
 
the_nines said:
But we do.....I mention it on the previous page:
Click to expand...

Sorry, I was unclear. The gage has its own thickness to consider. I meant if we knew the distance from the edge of the headshell itself to the stylus tip (without the gage in place after the alignment is complete).

A simple gage could then be made from like really thin styrene to that exact dimension. Or did I misread this altogether? The dimension of 10mm is from the headshell edge to the stylus tip without the gage in place?
 
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I tend to agree with old tech - allowing 2.5mm for front plastic thickness
the dimensions should read 7.5mm for setback from front of headshell and 24-25mm from top of headshell to stylus tip
note the thorens diagram does not show the stylus in the dimple in the base but only in elevation where it aligns with the side wall recess.

Edit apologies revised pdf drawing here 7.5 & 24mm
 

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Thanks ReDone. I will check what I have at home. I wonder how close I am having used the Thorens protractor from VE? Using this jig and dimensions do we mount the cartridge square in the headshell as with similar gages?

So it's 7.5mm stylus tip to headshell edge -to confirm?

Thank you,
 
yes square but I havent checked the front elevation dims yet

7.5 depends on the front wall plastic thickness 2.5mm allowed its a "smidge over 2mm" & looks thicker than the side wall & top thickness.
 
The gauge you construct may be as thick as you want it to be.

The measurements I gave (25mm & 10mm) have been taken from inside the gauge shell, not the outside.

As long as your stylus is 25mm from the floor & 10mm from the wall it's up against.
 
How can those dims work Mr Nines? the headshell is set back 3mm from the inside face of the front plastic which has a thickness of 2.5mm? - which gives 7.5mm

your photos show the setback

This taken from your first sketch dimensions

my head is stating to hurt ;)
 
What I'm saying is the setback is only there to hold the headshell in place (so it doesn't fall down when supporting it). If you turn the headshell upside down (stylus pointing to the sky) there is no need for these setbacks.

Forget the gauge for one moment.....

Put a bookend on a table. This creates a 90 degree angle between bookshelf and table. For the sake of this explanation consider the table as your "floor" and the bookend as your "wall".

Turn the headshell upside down (with cart in place and pointing to the sky) and lay on the table.

Slide the headshell toward the bookend until they meet flush.

The distance from the floor to the stylus should be 25mm.

The distance from the bookend to the stylus should be 10mm.

Elementary.......no??
 
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No sorry I can't agree as the set back behind the front is shown in the photos & your diagram

2.5 +3 +3 =8.5mm

16-8.5 = 7.5mm distance from front of headshell to stylus
 

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ReDone,
I just measured my AT440mla stylus it is 5mm from the edge of the headshell. It's not square as I made the cantilever parallel with the VE protractor.
Not sure what to try. 2.5mm is a long ways off if that gauge is 7.5mm. This is a great thread we are learning alot. I am not sure why I am at 5mm though. Very hard to measure.
 
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Thats not what the thorens manual image shows Mr Nines

We are making heavy weather of something simple here & that's not my intention

I'm working to the thorens diagram for the moment (with your dimensions) & I'd really like to get it right

Where is the dimple - how deep from back face?

my gut feeling instinct in setting the stylus 10mm back from front of headshell is too much. (I could be wrong.) The dimension depth from the back of the base to the rear face of the front plastic is what exactly? then we have the depth of the dimple triangle & the top offset & the cutout notches on the sides - these were all there for a purpose

thanks for sticking with it
 
Old_Tech said:
ReDone,
I just measured my AT440mla stylus it is 5mm from the edge of the headshell. It's not square as I made the cantilever parallel with the VE protractor.
Not sure what to try. 2.5mm is a long ways off if that gauge is 7.5mm. This is a great thread we are learning alot. I am not sure why I am at 5mm though. Very hard to measure.
Click to expand...

The gauge is simply thorens own protractor - it would have been useful if they supplied some dimensions to go with it.

the VE protractor I think was drafted by SEB to his set of calculations

Seb's protractor should be superior performance to the Thorens but does not mount parallel in the headshell.

My 75ED is set back 4- 5mm

Edit the recommended arc is 230mm effective length so the gauge could be checked against that
 
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Don't get frustrated guys this is some very good analysis here. The diagrams and interpretations have been very good. I am a Tech Writer I can vouch for that.

I think my 5mm is very close I worked hard with the VE protractor but if I am missing something please feel free to say.
Thank you-man I would love to get this right.

Also, I believe it's true the V notch is an approximate landing zone. What tolerance does that give us?
 
Well I could just produce the 230mm arc as a pdf protractor to get the original thorens spec.

if the cart is set central & parallel to the RHS of the headshell that should be it
 
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