Decca london elliptical brochure

Page 1

The Decca
London Elliptical
A Cartridge

VA is 4,7

with positive scanning
"35 mark 6E

Page 2

The Decca
London Elliptical
Cartridge

wrth posrtive scanning
llss mark 6E

When the London
Cartridge was

I ~931Mb: introduced with its

spherical or round stylus Decca recognised
that some records would perform better if
played with an elliptical stylus. In theory,
all records should sound better when
reproduced with an elliptical stylus since
this shape is more like the recording
stylus and will, therefore. more accurately
follow the wavelength of the groove,
particularly at the shorter (high frequency)
end.

This theory assumes three essential
requirements:

1 That the stylus has been correctly
mounted in the armature by the
manufacturer and that the stylus
assembly is also correctly mounted in its
cartridge.

2 That the cartridge has been correctly
mounted in the headshell.

3 That the arm has no tracking error. that
is to say, it follows the same path
tangentially across the record, like the
original recording machine.

ll there is to be any improvement in
reproduction from using the elliptical
shape, any errors in these three areas
must be minimised.

Among the sophisticated
methods of manufacture of the
London elliptical. Decca start with
a square of naked diamond
ensuring that the ellipse is
accurately formed by the lapidary,
- and that the square is set
accurately in the
box section of the