Table of Contents
Advertisement
SPECIFICATIONS
Specifications
Gliding Frequency Recordings.
QR 2007 Monophonic.
QR 2009 Stereophonic.
Diameter:
301.6 mm (11 7/8"). *)
Diameter of Centre Hole: 7.3 mm ( o.287"). *)
Material:
Groove Type:
Groove Dimensions:*)
Minimum top width:
Maximum bottom
radius:
Included angle:
Cutting angle:
Rreproducing Stylus Tip
Radius:
Speed of
Ro.
t ation:
Recorded Surface:
Program:
Diameter of the QR 2007
Bands:
Vinylite (copolymer of vinyl chloride and vinyl
acetate).
"fine groove", lateral cut.
o.055 mm ( o.00215").
Less than o.005 mm ( o.0002")
.
90°.
Should be comprised between 12 and 26 p, (included
angle 40° to 50°).
45 rev/min.
Outer diameter: 292 mm (11 1/2"')
.
Inner diameter: 123 mm (4 3/4").
Each band consists of a logarithmic frequency
sweep 20 Hz to 20 kHz in 15 seconds (QR 2007) or
50 seconds (QR 2009), immediately
preced.
e d by a
1ooo Hz refer ence and starting signal
lasting
a few
seconds. See Fig. 5 and 9.
(at 20 Hz
point)
290- 272-
254-236-
218-200-
182-164-146-128
mm.
*)
In
accordance
with
the
recommendations
of
the
International Electrotechnical
Commission, Publications 98 and 98-1.
34
Advertisement
Table of Contents
