mai 07 |
Today I bought the capsule and needle for my radiola! Rarity. It is a capsule Le son, model 6501-D model and needle 1001. Cost? Twenty real.
The site of Le Son found the following:
The weight of the capsule music, which is a few ounces, is fully supported by the limited contact area of the stylus on the record, which is a few hundredths of a millimeter square. This represents a pressure of hundreds of atmospheres, resulting in the area of friction, the instantaneous temperatures exceed the 1000 ° C. The only material that supports these working conditions is the diamond, which has a high melting point (3,700 ° C) and a hardness of 6500 on the scale Knoops. Then the material more resistant to friction is the sapphire with a hardness of 2000 Knoops. For this reason, all the tips of phonograph needles are quality diamond ultra-polished, which in normal use, has a lifespan of approximately 1000 hours, or sapphire that has a life span of approximately 100 hours.
The needles are made of diamond embedding is a diamond stone in a titanium rod. material ultra Slight. stone diamond is cut and polished microscopically giving rise to different types of needles.
The Le son (Sonic Engineering Laboratory) is a company created in 1963 and last year sold 1.2 million units, needles, and sold 25 million per year in the 70's.
The most amazing is to see that in the 70 already manufactured needles for turntables tipped diamond and titanium rod! And the building still exists ...
