Ortofon jubilee brochure

Page 1

JUBILEE Moving Coil Cartridge

orlofon

accuracy in sound

Ortofon vas founded in 1918 by two Danish engineers.
Axel Petersen and Arnold Poulsen. These two pioneers
had one clear objective in mind - to out sound onto film,
and with this, they established the Electrical Fonofilms
Company A/S, which later was re-named Ortofon. A few
years later, in the Palace Theatre. Copenhagen. they
were able to present the first fully-syncronized sound film
and in so doing, created a world sensation. The founders
took out several patents and issued licences to film com-
panies the world over for their System Petersen og Poul-
sen", which is even to this day the basis for film with opti-
cal sound.

Until the second world war. Ortofon's growth was based
entirely on the sound film. However. during the war and
immediately afterwards. production was re-organized to
include record cutting and reproducing equipment. The
first Moving Coil cutterhead was produced as early as

1945. and the Moving Coil principle was then further
developed to enable production of Moving Coil cartridges.
The very first mono cartridge was introduced in 1948 fol-
lowed by the SPU stereo cartridge in 1959. In 1969 Orto-
fon introduced its first Magnetic cartridge designed on the
patented VMS principle, which together with the Moving
Coil cartridges made Ortofon the worlds leading cartridge
manufacturer.

Over the years Ortofon has designed and introduced
more than 300 different types of cartridges and the com-
pletely new-designed MC Jubilee is presented in celebra-
tion of Ortofons 80 years anniversary.

Throughout the years our motive has remained the same
- to advance and produce equipment of the highest
technical quality for the sound industry and the discerning
mUSlC lover. That is why. for us, Accuracy in Sound" is not
just a slogan. It is our reason for being in business.

Page 2

orioion

accuracy in sound

JUBILEE Moving Coil Cartridge

Ortofon Jublee»:;uriiitxge In: h. ,...,-... .

Introduction

For the celebration of Ortofons 80 years anni-
versary we found the time had come to realize a
dream of making a quite new design concept for
an Ortofon Moving Coil cartridge.

How would it be possible to influence the most
important part of this new concept - the sound
- in such a way, that true lovers of analogue
reproduction would find. that the Ortofon Sound
- once again - had improved the listening expe-
rience to this outstanding medium. After many
and serious investigations we came to the con-
clusion, that by utilising high quality materials
with the best Ortofon design elements through-
out the years we would reach our goal.

The response we received from test-listeners to
the first prototypes of this new Ortofon concept
was very positive and revealed the impression
of a new dynamic, but well balanced sound
image over the entire frequency range. It is our
hope. that all our faithful customers will agree
upon this statement and enjoy their precious
collection of records even more when listening
to the Ortofon MC Jubilee cartridge.

New design elements

The new appearance of the design is a result of
a co-operation between professional industrial
designers and the Ortofon Chief Engineer Per
Windfeld, where the most advanced technology
and processing should have a very high priority.
During the developing process it became more
and more evident. that the requirements to both
outside as well as inside parts became so
demanding with respect to details and finish.
that usual manufacturing procedures were in-
sufficient.

Design features

When you have a look all around the Ortofon
MC Jubilee cartridge you will find several intere-
sting new things. First of all we hope you like the
visual design. But we have also done our utmost
to make it practical in use. The stylus is well pro-
tected against accidents. but at the same time
very visible for searching the groove. The termi-
nal pins have been pressed ton/vard into the
housing to give more space for the lead wires
between the cartridge and tonearm-mead shell
terminals.

On the bottom side of the cartridge a conductive
carbonfibre part will help eliminate electro-static
clicks from the record. Besides, this part is lower
than the metal parts in order to protect the
record if the cartridge by accident should be
dropped. The upper side of the cartridge has 2,5
mm threaded holes for mounting and 3 elevated
points in triangular position to stabilize contact to
the head shell.

When mounting the Ortofon MC Jubilee car-
tridge on tonearms with fixed head shell, it will
still be possible to adjust the vertical position of
the cartridge about 2 degrees with the screws,
because the point between the screws is acting
as a pivot. The two long contourlines seen on
the front of the cartridge will give a very precise
reflected image in the record for this tilt align-
ment.

Technical Data

The only method that would meet our require- OUtIOUt voltage at 1000 Hz, 5cm/sec. 340 W

ments, was found to be the so-called Metal Channel balance at 1000 HZ < 1 dB

Injection Moulding process (MlM). This process .

is based on very fine metal powders being mi- Channel separation at 1000 HZ > 27 dB

xed into a polymer and injected into a mould- Channel separation at 15.000 Hz > 20 dB

After moulding the parts will pass heat treatment Frequency range at _ 3 dB 20 _ 60 000 HZ

and sintering processes. and the result is solid
metal parts of either stainless steel to be used
for the outer design or highly conductive iron for
the magnetic circuit. Very low wall thickness to-

Amplitude response
FIM distortion at recommended

20 - 20.000 Hz, +1 .5/-0 dB

gether with miniaturisation of the magnetic cir- tracking force DIN 45.542 < 1%

cuit made it possible to keep the cartridge weight Tracking ability at 315 HZ at

as low as 10.5 gram. ,

All parts in the Ortofon Jubilee model are pres- recommended traCk'ng force 100 Um

sed together to an almost solid unit, so no use of Compliance, dynamic, lateral 15 pm/mN
screws and glue was necessary. As mentioned, S l .

a new unique magnetic circuit was developed in W us type NUde Shlbata
order to 'cfinfientrate" magnetic {lu>;lilrie3k in the Stylus tip radius r/R 6/50 Hm
airgap W: e sma es amoun 0 ea age in . .

the circuit. The solution was to place the arma- Equrvalent Sty'us tip mass 022 mg

ture and the damping system inside the Neody- Tracking force range 20.25/2.0-2.5 mN/gram
mium magnet itself. By doing so we gained a -

raise in output voltage of 35%. compared to the Tracking force recommended 23/2'3 mN/gram
MC Rohrnann cartridge. The wellknown Ortofon Tracking angle 20°
WFD'damPWSYSeW (Wide Range DamP'9) internal impedance DC resistance 5 Ohm

is also implemented in the MC Jubilee cartridge, _

controlling the high- and low frequency damping Recommended load impedance > 10 Ohm
separate'¥- _ Cartridge body material Stainless steel/aluminium
The effective mass has been reduced in the new C . d l

stylus/cantilever system by using a very thin art 99 C0 our Purp|e/blaCk
Boron rod. This material is extremely stiff and Cartridge Weight 105 gram

even more lightweight compared to aluminium.
Besides is the velocity of sound almost 3 times
higher compared to that of aluminium. Com-
bined with the nude high-polished Shibata dia-
mond stylus at the end of the cantilever. we have
developed one of the new elements responsible
for the new sound. 6-nines (99.999996) pure sil-
ver is used for the coils on the armature where-
by the DC resistance has been kept as low as
5 Ohm.

Dvinfnrl in hum-nit hu Dnnnnhnrn Dnnn-nb