https://forum.talkingmachine.info/
As a rough notion its a bamboo breadboard inside a Pelican case with an HMV32 motor and a PVC horn attached. The horn is underneath, so essentially its a portable.VanEpsFan1914 wrote: Neat! Good luck with it; I am very curious what it will look like.
Definitely worth trying out, at least in theory. In practice, copper platters are extremely scarce, occasionally handcrafted in small numbers, and usually cost a half fortune. I've never really seen one mass-produced. Usually they're also too heavy compared to the orginal rubber platter, which poses questions about the long term mechanical integrity of the spindle, motor stress, etc. Add to that the fact that copper is very easily oxidised and looks awful if not polished daily/weekly, and you'll get a picture of the reason why I never really felt compelled to try it out.Daithi wrote:How about a sandwich of carbon fiber and some heavy material?
A laminate of rubber in the middle and carbon fiber on the outside with the top and bottom carbon fiber layers electrically connected at the edge ?Marco Gilardetti wrote:
Definitely worth trying out, at least in theory. In practice, copper platters are extremely scarce, occasionally handcrafted in small numbers, and usually cost a half fortune. I've never really seen one mass-produced. Usually they're also too heavy compared to the orginal rubber platter, which poses questions about the long term mechanical integrity of the spindle, motor stress, etc. Add to that the fact that copper is very easily oxidised and looks awful if not polished daily/weekly, and you'll get a picture of the reason why I never really felt compelled to try it out.
Marco, deviating a bit from the main subject, I use in one of my (modern) turntables a dust cleaner arm with carbon fiber brush, and with a wire that connects to the turntable ground. It is a pretty effective remover of dust and static electricity out of the record surface. I think these are still for sale, it is made in the UK.Marco Gilardetti wrote:
Well, my take on this is that the "improvement" has little or nothing to do with resonance, but it's instead due to the fact that copper is a conductive material, that quickly discharges to ground static electricity.
A spray of polyurethane (or something similar) will prevent the polished copper from oxidation.Marco Gilardetti wrote:Daithi wrote:... Add to that the fact that copper is very easily oxidised and looks awful if not polished daily/weekly, and you'll get a picture of the reason why I never really felt compelled to try it out.
The posts I've read discussing improvements using a copper mat on an electronic turntable seem to focus on the sound quality rather than using the mat to discharge static. For static to discharge it needs to connect with something grounded. A wire connecting the copper mat to the turntable or power ground would do this, but if this isn't available it could discharge to a person with a zap!Marco Gilardetti wrote:Well, my take on this is that the "improvement" has little or nothing to do with resonance, but it's instead due to the fact that copper is a conductive material, that quickly discharges to ground static electricity...Marco Gilardetti wrote:there's today's extravagant person who say he listens with a copper "mat" [on an electronic turntable] and reports "improvements" in sound quality.
It would be nice to try many things, if only a decent way to cut precise circles at home had been devised. Even factory-cut mats most of the times are an offense to the eye when seen revolving.Daithi wrote:A laminate of rubber in the middle and carbon fiber on the outside with the top and bottom carbon fiber layers electrically connected at the edge ?
Hello Carlos, thank you, I already use one of those.CarlosV wrote:Marco, deviating a bit from the main subject, I use in one of my (modern) turntables a dust cleaner arm with carbon fiber brush, and with a wire that connects to the turntable ground. It is a pretty effective remover of dust and static electricity out of the record surface. I think these are still for sale, it is made in the UK.
Wow, I'd love to hear and see one of those. I don't suppose any still exist?AudioFeline wrote:An article from the "Popular Science Monthly" magazine, pp.26-27, Sept. 1922.
It's a "new" (for 1922) phonograph design which uses "resonating wooden rods".
https://books.google.com.au/books?id=6C ... &q&f=false