Eminent ET-II Скачать руководство пользователя страница 18 | Manualshive

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Eminent ET-II Скачать руководство пользователя страница 18

TECHNICAL DISCUSSION

The compliance (spring stiffness) of a phono cartridge and the effective mass of a tonearm

create a spring-mass system with a corresponding natural frequency. For a typical

tonearm/cartridge combination, the resonant frequency of this spring/mass system generally falls

below 20 Hz. On the surface it would seem that this does not create a problem. However, the

rise in frequency response of this system for most arm/cartridge combinations is quite substantial

(usually on the order of 8dB with a very high Q) and would not be tolerated in any other

associated piece of equipment (speakers, electronics, etc.) The effects that result from this rise in

response are in some cases subtle and in other cases substantial.

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Содержание ET-II

Страница 1: ...FLUID DYNAMIC DAMPING FOR THE ET II EMINENT TECHNOLOGY INC 225 EAST PALMER STREET TALLAHASSEE FL 32301 850 575 5655...

Страница 2: ...e tonearm Installation is simple and straightforward and does not require tonearm removal from the turntable or any special tools Be very careful when handling the silicone fluid which is included wit...

Страница 3: ...ner 409 Fantastic Windex etc using paper towels Then use alcohol and paper towels bath tissue or cotton balls rubbing the bearing thoroughly Silicone fluid will not damage the bearing The inside porti...

Страница 4: ...y that fluid will get on your hands or any part of the tonearm during normal use The rigid semi circular trough is constructed of an anodized aluminum alloy The shape always maintains a constant dista...

Страница 5: ...ble using the tonearm You should know how to level the tonearm and set the tracking force before installing the damping trough We believe that the damping trough can be installed on any turntable ET 2...

Страница 6: ...During all of the installation procedures put your cartridge stylus guard in place on the cartridge and leave the cuing lever in the up position No adjustments will be made to the cuing assembly...

Страница 7: ......

Страница 8: ...he end of the spindle Do not overtorque these screws when re assembling this part The 3 32 allen wrench which is supplied with the ET 2 is the only tool required for installation After the counterweig...

Страница 9: ...weight clamp I beam assembly onto the spindle Be careful with the wires to make sure that they are not being pinched on the underside of the counterweight clamp as it is being pushed onto the spindle...

Страница 10: ...noacrolate and then re assembled The counterweight I beam should be positioned by rotating the counterweight clamp on the spindle until the I beam is parallel to the tonearm tube It can be positioned...

Страница 11: ...DAMPING TROUGH WITH ADHESIVE PADDLE...

Страница 12: ......

Страница 13: ...der the spindle and parallel to it The inside fluid stop should be directly up against the manifold housing When the above two conditions are met light finger pressure under the trough will secure it...

Страница 14: ......

Страница 15: ...eight clamp and can be raised or lowered by rotation Turn the paddle until it is positioned about 1 16 above the dry trough across the full travel of the tonearm It is OK to move the air bearing back...

Страница 16: ...be required to establish contact between the paddle and the fluid over the full travel of the spindle SETTING THE TRACKING FORCE AND LEVELING THE TONEARM If the counterweights were not removed or repo...

Страница 17: ...This additional mass may affect a lightly suspended turntable so it is recommended that the level be checked Use the procedures described in the tonearm owner s manual Please note that the tonearm no...

Страница 18: ...s system generally falls below 20 Hz On the surface it would seem that this does not create a problem However the rise in frequency response of this system for most arm cartridge combinations is quite...

Страница 19: ...htly with respect to mid range frequencies within the audible range and substantially shifted up to several periods at resonance This is difficult to measure with a tonearm but easy to measure in a lo...

Страница 20: ...on a turntable tonearm cartridge system you would hopefully want 1kHz to come back Something close to 1kHz comes back but rapidly being shifted up and down around 1kHz If the frequency is shifted up t...

Страница 21: ...o a subjective ability to hear wow and flutter Reviewers have incorrectly attributed wow and flutter to the turntable Since the advent of the belt drive turntable wow and flutter has been purely a fun...

Страница 22: ...ame cartridge test record of about 2 3 to that of the pivoted arm 03 07 to 05 This is because the straight line tonearm has a geometry advantage and lateral motion does not result in stylus longitudin...

Страница 23: ...with the ET drop still lower and with one test record we measured readings as low as 007 Surface irregularities on the vinyl of the LP record are the primary cause of rumble or random low frequency no...

Страница 24: ...tonearm once without the damping trough and once with the damping trough The cartridge used was of very low compliance and the tonearm was set up so that a high amplitude high Q resonance existed The...

Страница 25: ......

Страница 26: ...ration of vertical displacement of the stylus to paddle movement is about 7 to 1 horizontally it is 1 to 1 If the paddle were made wider it would be more effective vertically but in general this is no...

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