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Cartridge set-up
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Joined: 11 Jan 2008
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Points: 16314 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2016 at 5:59pm
If you use the Technics stylus overhang gauge (part no: SFK0135-01) you will be able to set your cartridge to the exact required position without all the faff of using a protractor.

These are very cheap and available from places like Juno Records: http://www.juno.co.uk/search/?q%5Ball%5D%5B%5D=overhang+gauge&hide_forthcoming=0 (£2.50)
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Points: 121 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Paul H Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2016 at 6:09pm
Originally posted by Drewan77 Drewan77 wrote:

Paul: I had a look at the specs Henley publish and the 8.6CC Evolution carbon tonearm has a pivot-spindle measurement of 200mm (218.5mm - 18.5mm overhang)
Thanks Andrew. I inputted the 200mm dimension and selected IEC, as you suggest and printed out the protractor.

Interestingly, it quotes an effective length and overhang that are different from the official spec. For reference it gives

Eff length: 219.040 compared to 218.5mm spec
Overhang: 19.040 compared to 18.5mm

Should this concern me?
ProJect 1Xpression Carbon UKX w/ Ortofon 2M Black; Arcam Alpha 7 CD player; Graham Slee Revelation M pre; Denon PMA 355UK amp; Epos K1 speakers; Blue Jeans LC-1 interconnects. Room: 2.9m x 3.1m.
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Points: 1544 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Drewan77 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2016 at 6:31pm
Peter, You mentioned by PM that your SL1200 was from 1973, ie Mark 1. The vinyl Engine database shows the following.

Mk1 1972-79, Mk2 1979+

Tonearm: universal

Effective length: 220mm (mk1), 230mm (mk2)

Overhang: 14mm (mk1), 15mm (mk2)

I have sent you the null points for both versions.



Edited by Drewan77 - 11 Aug 2016 at 6:54pm
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Points: 1544 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Drewan77 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2016 at 6:41pm
Originally posted by Paul H Paul H wrote:

Thanks Andrew. I inputted the 200mm dimension and selected IEC, as you suggest and printed out the protractor.

Interestingly, it quotes an effective length and overhang that are different from the official spec. For reference it gives

Eff length: 219.040 compared to 218.5mm spec
Overhang: 19.040 compared to 18.5mm

Should this concern me?

Conrad Hoffman designed this protractor to adjust correctly against any pivot to spindle measurement and the different inputs/alignments will compute a slightly different set of results. There is no 'perfect' alignment, all are a slight compromise.

If you want to change to Lofgren B & DIN then 218.5 & 18.5 will appear as you would expect. 
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Paul H View Drop Down
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Points: 121 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Paul H Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2016 at 6:44pm
Gotcha. Does that just mean that ProJect used Lofgren B to calculate their spec figures?
ProJect 1Xpression Carbon UKX w/ Ortofon 2M Black; Arcam Alpha 7 CD player; Graham Slee Revelation M pre; Denon PMA 355UK amp; Epos K1 speakers; Blue Jeans LC-1 interconnects. Room: 2.9m x 3.1m.
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Points: 1544 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Drewan77 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2016 at 6:52pm
Originally posted by Paul H Paul H wrote:

Gotcha. Does that just mean that ProJect used Lofgren B to calculate their spec figures?
Yes, because the arm length is fixed but the overhang can vary depending on where you place the cart in the headshell slots. 

The differences are tiny but all results will be 'correct' against the chosen parameters (as long as it is printed exactly to scale & the offset angle is aligned to the cantilever).
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Points: 1544 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Drewan77 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2016 at 6:58pm
Originally posted by Graham Slee Graham Slee wrote:

If you use the Technics stylus overhang gauge (part no: SFK0135-01) you will be able to set your cartridge to the exact required position without all the faff of using a protractor.

These are very cheap and available from places like Juno Records: http://www.juno.co.uk/search/?q%5Ball%5D%5B%5D=overhang+gauge&hide_forthcoming=0 (£2.50)
Oh, but I thought faffing was half the fun of owning a turntable Graham?
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