Jubilee (MC)Cartridge

Introduction ToThe JubileeThe Ortofon jubilee cartridge, was made especially forthe celebration of Ortofon's 80th anniversary. For quit some timeit has been Ortofon's goal to create an entirely new cartridge design- visually as well as in sonic performance - our aim is to bringyou many hours of a new previously unparalleled listening experiencewhile enjoying your precious record collection. How would it be possibleto influence the most important part of this new concept - the sound- in such a way, that true lovers of analogue reproduction wouldfind, that the Ortofon Sound - once again - had improved the listeningexperience to this outstanding medium. After many and serious investigationswe came to the conclusion, that by utilizing high quality materialswith the best Ortofon design elements throughout the years we wouldreach our goal.The response we received from test-listeners to thefirst prototypes of this new Ortofon concept was very positive andrevealed the impression of a new dynamic, but well balanced soundimage over the entire frequency range. It is our hope, that all ourfaithful customers will agree upon this statement and enjoy theirprecious collection of records even more when listening to the OrtofonMC Jubilee cartridge.New Design ElementsThe new appearace of thedesign is a result of a co-operation between professional industrialdesigners and the Ortofon Chief Engineer Per Windfeld. Were the mostadvanced technology and processing should have a very high priority.During the developing process it became more and more evident, thatthe requirements to both outside as well as inside parts became sodemanding with respect to details and finish, that usual manufacturingprocedures were insufficient. The only method that would meet ourrequirements, was found to be the so-called Metal Injection Mouldingprocess (MIM).This process is based on very fine metal powders beingmixed into a polymer and injected into a mould. After moulding theparts will pass heat treatment and sintering processes and the resultis solid metal parts of either stainless steel to be used for theouter design or highly conductive iron for the magnetic circuit.Very low wall thicknes together with miniaturisation of the magneticcircuit made it possible to keep the cartridge weight as low as 10.5grams. All parts on the Ortofon Jubilee model are pressed togetherto a almost solid unit, so no use of screws or glue was necessary.As mentioned, a new unique magnetic circuit was developed in orderto concentrate magnetic fluxlines in the air gap with the smallestamount of leakage in the circuit.The solution was to place the dampingsystem inside the Neodymium magnet itself. By doing so we gaineda raise in output voltage of 35% compared to the MC Rohmann cartridge.The well known Ortofon WRD-damping system (Wide Range Damping) isalso implemented in the MC Jubilee cartridge, controlling the high- and low frequency damping separately. The effective mass has beenreduced in the new stylus/cantilever system by using a very thinBoron rod. This material is extremely stiff and even more lightweightcompared to aluminium.Besides is the velocity of sound almost 3times higher compared to that of aluminium. Combined with the nudehigh-polished Shibata diamond stylus at the end of the cantilever,we have developed one of the new elements responsible for the newsound. 6-nines 99.9999% pure silver is used for the coils on thearmature whereby the DC resistance has been kept as low as 5 Ohm.TECHNICAL DATAOutput voltage at 1000 Hz,5cm/sec.340 ?VChannel balance at 1 kHz< 1 dBChannel separation at 1 kHz> 27 dBChannel separation at 15 kHz> 20 dBFrequency range20 - 60,000 HzFrequency response20 - 20,000 Hz + 1.5 / - 0 dBFIM distortion at recommendedtracking force, DIN 45.542< 1%Tracking ability at 315Hz atrecommended tracking force100 ?mCompliance, dynamic, lateral16 ?m/mNStylus typeNude ShibataStylus tip radiusr/R 6/50 ?mEquivalent stylus tip mass0.22 mgTracking force range2.0 - 2.5 g (20-25 mN)Tracking force, recommended2.3 g (23 mN)Tracking angle20