Replacement stylus for an Edison diamond reproducer

[herrickpickups]

Wondered if anybody had any success with replacing the "Diamond" tip of an Edison diamond reproducer with a later equivalent ? The microgroove points made for the HMV Hyper sensitive pickups of the late 1930's look to be of similar diameter ..but I wonder if the profile of the point is significantly different or would damage a cylinder ?
thanks

[edisonplayer]

Wyatt Marcus has them.edisonplayer

[JohnM]

[email protected]

[herrickpickups]

Hi, thanks for the link, since I put this Question up I drilled out the broken tip & replaced it with a period sapphire made for a Hyper sensitive pickup from the 30's-50's period & amazingly, it works, doesn't leave any new marks on a blue amberol. Great ! I used the loctite retaining compound (638) so tha if it didn't work it could be removed with a soldering iron .

[Marc Hildebrant]

It is very important to use the correct size stylus that Edison used. A conical 3.5 mil diameter is the size you want. With the Edison weight in the reproducer, a small stylus will wear out your records.

Edison picked the stylus size to keep the pressure low enough for the record material. Smaller, and the stylus pressure increases a lot.

Use the correct parts.

Marc

[Benjamin_L]

That's not the best, I recommend getting the right diamond point.

[herrickpickups]

Thanks for the advice, rather than leave anything to chance, I bought a decent stereo microscope by PRIOR years ago, with it's 60X magnification it's possible to hold & inspect, side-by-side, if you will.... any 2 stylii for comparison. There are many opinions on-line from "experts" that have merit but I find the best way to resolve a question like this is to rely on my own eyes & judge it myself. Of course buying an Original new old stock part negates the necessity to think for oneself but an ability to inspect the items in Question with your own eyes is for myself at least, a better option as then also something of value has been learnt rather than simply relying on the Dogma passed around by those without the means to actually check matters for themselves

[Marc Hildebrant]

You asked for advice, and I gave you some. Sadly, you added some insults.

I calculated the force on the Diamond Cut Record, Edison Sylus, using the Hertz model for two spheres in contact. Standard models for contact mechanics. The force applied by an Edison Diamond Stylus (Diamond Disc Machine) is about 181,371 PSI with a contact radius 1.05 mil.

Why don't you make some calculations yourself?

Marc

[Benjamin_L]

Thanks for the advice, rather than leave anything to chance, I bought a decent stereo microscope by PRIOR years ago, with it's 60X magnification it's possible to hold & inspect, side-by-side, if you will.... any 2 stylii for comparison. There are many opinions on-line from "experts" that have merit but I find the best way to resolve a question like this is to rely on my own eyes & judge it myself. Of course buying an Original new old stock part negates the necessity to think for oneself but an ability to inspect the items in Question with your own eyes is for myself at least, a better option as then also something of value has been learnt rather than simply relying on the Dogma passed around by those without the means to actually check matters for themselves

It's not the right size... Don't say we warned you...

[JerryVan]

Thanks for the advice, rather than leave anything to chance, I bought a decent stereo microscope by PRIOR years ago, with it's 60X magnification it's possible to hold & inspect, side-by-side, if you will.... any 2 stylii for comparison. There are many opinions on-line from "experts" that have merit but I find the best way to resolve a question like this is to rely on my own eyes & judge it myself. Of course buying an Original new old stock part negates the necessity to think for oneself but an ability to inspect the items in Question with your own eyes is for myself at least, a better option as then also something of value has been learnt rather than simply relying on the Dogma passed around by those without the means to actually check matters for themselves

It's not the right size... Don't say we warned you...

It'll be okay, he's smarter than we are...