Glass instead of mica for reproducer rebuid?

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bigshot
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Re: Glass instead of mica for reproducer rebuid?

Post by bigshot »

The only way to compare a subtle difference would be to have two identical machines side by side to do a direct A/B comparison. Human auditory memory for similar sounds is as short as a few seconds, and expectation bias is a huge influence as well. If the difference between the two isn't great, as much time should be put into setting up a controlled listening test as into fitting the machines with diaphragms.

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mrrgstuff
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Re: Glass instead of mica for reproducer rebuid?

Post by mrrgstuff »

bigshot wrote: Wed Oct 13, 2021 4:11 pm The only way to compare a subtle difference would be to have two identical machines side by side to do a direct A/B comparison. Human auditory memory for similar sounds is as short as a few seconds, and expectation bias is a huge influence as well. If the difference between the two isn't great, as much time should be put into setting up a controlled listening test as into fitting the machines with diaphragms.
Whilst by no means perfect - it is possible to overcome human auditory memory to a certain degree by comparing recordings made by different soundboxes / reproducers on the same machine. I have made several tests like this - splicing together the recordings to help the comparison. One example is here:

https://youtu.be/Me3WSV9OF9c

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Jonsheff
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Re: Glass instead of mica for reproducer rebuid?

Post by Jonsheff »

I certainly wouldnt substitite anything but original material for one of my restores for resale but might try it on my personal Victrola XVII. I wonder if these guys can put the hole in the middle for the screw? Corning Gorilla Glass wafers https://valleydesign.com/gorilla-glass-wafers.html

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BassetHoundTrio
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Re: Glass instead of mica for reproducer rebuid?

Post by BassetHoundTrio »

That is indeed the one!!
barnettrp21122 wrote: Wed Oct 13, 2021 8:00 am
BassetHoundTrio wrote: Wed Oct 13, 2021 6:44 am I recall a YouTube video of an EMG gramophone with a glass diaphragm - I think it belonged to Wyatt Markus at the time. I am trying to find the video...
Is this it?
Bob

https://www.youtube.com/watch?v=lf5otGAbE9M

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