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Translation of Löfgren's paper is finished

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Translation of Löfgren's paper is finished

Postby Klaus R. » 26 Nov 2008 14:06

Hello engine members,

it has taken more than a year but now it is finished: exactly 70 years after the publication of the original paper in Germany in November 1938 the translation into English is available:

https://www.vinylengine.com/ve_downloads ... n_2008.pdf

Once again, thanks to all who participated in this project.


Klaus
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Postby bastlnut » 26 Nov 2008 14:18

hallo,

congratulations and thanks!
Klaus and all who helped, that was a huge job!
many many will be thankful for your effort.

regards,
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Postby Seb » 26 Nov 2008 22:26

yipee !

many thanks Klaus for your time and the work done by your team!

This is really splendid!

(BTW, what editor did you use? some kind of scientific word?)

best regards

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Re: Translation of Löfgren's paper is finished

Postby andyr » 27 Nov 2008 02:28

Klaus R. wrote:
Hello engine members,

it has taken more than a year but now it is finished: exactly 70 years after the publication of the original paper in Germany in November 1938 the translation into English is available:

https://www.vinylengine.com/ve_downloads ... n_2008.pdf

Once again, thanks to all who participated in this project.


Klaus



Well done, Klaus et al! :D :D

Regards,

Andy
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Postby Klaus R. » 27 Nov 2008 08:59

@seb,

we used Microsoft Word, standard version. Graeme could locate a high quality electronic version of the original paper in some technical library and used that as basis for copying the equations, drawings etc. as image files into the Word document.

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Postby Seb » 27 Nov 2008 09:17

Klaus R. wrote:@seb,

we used Microsoft Word, standard version. Graeme could locate a high quality electronic version of the original paper in some technical library and used that as basis for copying the equations, drawings etc. as image files into the Word document.

Klaus


this is a really splendid work !

I though you rewrite all the equations using LaTex or scientific word.

best regards

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Postby Graeme Dennes » 07 Dec 2008 04:23

It's been a long time coming to the fore. Erik Löfgren was indeed the first to provide the optimum alignment geometry solutions (in 1938) to minimise the distortion resulting from lateral tracking error with a pivoted tone arm, by minimising and equalising the weighted tracking error at the three peaks across the record playing surface.

I hope we can now continue to recognise Löfgren's pioneering research findings by referring to his name in relation to the subject of optimum tonearm alignment, given that the later researchers (starting with Baerwald in 1941) "discovered" alignment geometry solutions identical to Löfgren's on each occasion, as my 1983 (and later revised) analysis shows. This solution is known as the "Löfgren A" solution.

He also developed the alternative "Löfgren B" solution, which reduces the distortion between the null radii by reducing the weighted tracking error in that region, as a trade-off against higher distortion at the inner grooves.

Both of these popular alignment strategies are due to Löfgren, and his name should rightly be associated with them.

Best regards,
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Postby teac4010 » 08 Dec 2008 19:59

Great Translation!

Now, does this confirm single pivot arms are subordinate to linear trackers? :oops:

Peace. Regards.
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Postby AndrewL » 10 Dec 2008 23:04

Much appreciated, thanks Klaus
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Postby Alec124c41 » 10 Dec 2008 23:19

teac4010 wrote:Great Translation!

Now, does this confirm single pivot arms are subordinate to linear trackers? :oops:

Peace. Regards.


Like anything else, it depends on how well the item is executed more than the approach.

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