Stax UA-3 Tonarm

[HighEndVerweigerer]

Hi,
hier für den schmalen Taler ein UA-7 wenn der ja die blöde Armstütze nicht separat hätte und wieder eine extra machen lassen....phuu  


https://buyee.jp/item/yahoo/auction/v1159690530


Guude
Harry

Danke, den hab ich auch schon in Beobachtung..........  

Ui, super. Zu der Japankauferei fehlt mir aber leider irgendwie der Zugang.
Was hast du gegen die Armstütze?
Ah, OK, selber gemerkt. Weil man da in den Dreher bohren muss oder? Wäre mit durchgehendem Tonarmbrett kein Thema.

Viele Grüße 

Roman

Erstens das Loch in der Zarge und zweitens mag Harry doch die Micro DDX-1000 so sehr. Da gibts dann keine Zarge, wo du ein Loch bohren kannst. Da kannste die Stütze nur noch so an den Tonarm hängen.....

[Darkstar]

Ich mag auch keine Arme mit Extrastütze. Ich finde, das sieht irgendwie doof aus.

[Darkstar]

Diese Info in japanischer Sprache habe ich noch zu bieten:

   
   
   
   
   
   

[HighEndVerweigerer]

Warte ab bis du eine Extrastütze brauchst Chris, dann findest du sie nicht mehr so doof......    

[Darkstar]

Alles kapiert? Macht nix. Hier kommt die Übersetzung:

STAX UA-3N / UA-3NL Multi-Use Integrated Arm

Introduction:
Unlike cartridges, tonearms should not have an inherent tonal color. However, the fact that sound quality changes when switching tonearms proves that selecting the right tonearm is necessary to ensure the stylus correctly traces the record grooves.

When looking at tonearms worldwide, many have a highly complex appearance. Yet, the fundamental principle of design is that the tonearm’s moving parts should have suitable weight for the cartridge and remain simple in construction. Ignoring this principle in pursuit of overly complex designs leads to compromised performance.

The UA-3N (35 cm model) and UA-3NL (40 cm model) are designed to prioritize “trackability,” which is the core purpose of a tonearm. They deliver integrated-level performance with any cartridge combination.

Arm Design Key Point – Trackability

When observed under a microscope, the grooves of a record appear as continuous curves and valleys, with additional warping or eccentricity that may even be visible to the naked eye. The core challenge of tonearm design lies in determining how accurately the stylus can track these grooves.

Particularly when using high-compliance cartridges with low tracking force, a tonearm with optimal effective mass and extremely sensitive pivot movement is essential. The UA-3N/ML is designed to meet this demanding requirement, providing excellent trackability under these conditions.

Trackability Issues:

1. Effective Mass
The moving parts of the UA-3N/ML (from shell to pipe to bearing) are constructed from a high-rigidity, lightweight alloy. This design not only eliminates harmful resonances that often occur in tonearms but also keeps the effective mass low, ensuring high trackability across various cartridges.
The low-frequency resonance frequency (fo), which depends on the effective mass and the cartridge compliance, ideally falls between approximately 7–12 Hz. If this frequency is too low, it will be adversely affected by record warping or eccentricity; if it is too high, it may cause low-frequency distortion. Experiments show that adding extra weight to the shell, increasing the effective mass, noticeably worsens trackability. This demonstrates the UA-3N/ML’s exceptional performance as a lightweight, high-trackability tonearm.

2. Rotational Sensitivity
The UA-3N/ML operates using a two-point pivot bearing system with a finely polished pivot point, combined with a stabilizer that limits lateral tilt through an outer bearing ring. This unique mechanism provides exceptional responsiveness and shows high sensitivity under 5 mg, including the frictional resistance of ultra-thin lead wires. The quality of rotational sensitivity directly influences the tonearm’s trackability, and in this respect, the UA-3N/ML stands apart from other tonearms worldwide.

Improvements from UA-3 to the Latest Model UA-3N/ML

More than two years have passed since the release of the UA-3, and in that time, ongoing evaluations have been made to improve basic performance, durability, and ease of use. These assessments have resulted in the final model, the UA-3N/ML. Below are the main improvements:

1. Shock-Damping Bearing Structure
The addition of two dampers provides series damping, effectively stabilizing tracking at very low stylus pressures. This feature allows tracking with as little as 0.1 g of stylus pressure, as long as the cartridge itself performs well.
2. Quick Balance with Single-Weight Design
A main weight and a sliding ring weight are used, covering various cartridge weights, to accommodate both domestic and international cartridges of differing weights. (For the older Ortofon SPU-G model, a separately sold sub-weight is required.) This design makes it easy to set both balance and stylus pressure accurately.
3. Durable and Lightweight Tapered Head Shell
The head shell, made from hard material and cold-processed, is reinforced with tapered ribs for greater strength and no risk of torsional resonance. The strength-to-weight ratio of this shell is higher than any other shell, making it ideal.

In addition to these primary upgrades, various improvements have been made, such as enhancing the precision of the arm lift, incorporating noise-resistant lead wires, and rationalizing the shell finger rest for ease of use.

Product Specifications

• Model Type: Interchangeable Pipe, Multi-Use Integrated Type
• Compatible Cartridges: Magnetic and Condenser types; suitable for cartridges weighing 5 g to 19 g
• Pipe: Available for Magnetic and Condenser use (in both stereo and monaural versions)
• Automatic Lateral Balance: Achieved via S-shaped pipe design
• Shell: U-shaped, resonance-free structure
• Stylus Position Adjustment Range: 8 mm
• Balance Weight: Single-weight system
• Stylus Pressure: 3 g with a 0.1 g step per rotation
• Overall Length: 340 mm
• Effective Length: 240 mm
• Overhang: 13 mm
• Bearing Center-to-Turntable Center Distance: 227 mm
• Tracking Error: 0.10° per cm or less
• Lift Mechanism: Oil-damped
• Lead Wire: Noise-resistant; 120 cm length

UA-3NL
• Model Type: Interchangeable Pipe, Multi-Use Integrated Type
• Compatible Cartridges: Magnetic and Condenser types; suitable for cartridges weighing 3 g to 17 g
• Pipe: Available for Magnetic and Condenser use (stereo only)
• Automatic Lateral Balance: Achieved via S-shaped pipe design
• Shell: U-shaped, resonance-free structure
• Stylus Position Adjustment Range: 8 mm
• Balance Weight: Single-weight system
• Stylus Pressure: 2 g with a 0.1 g step per rotation
• Overall Length: 420 mm
• Effective Length: 312 mm
• Overhang: 12 mm
• Bearing Center-to-Turntable Center Distance: 300 mm
• Tracking Error: 0.08° per cm or less
• Lift Mechanism: Oil damped
• Lead Wire: Noise-resistant; 120 cm length

Additional Notes:

• For condenser cartridge models (such as CPS-40 or CP-15V), the pipe needs to be replaced for installation. A head shell is not required.
For the Ortofon SPU-G/T model, which has a weight of 31 g, a separate sub-weight must be added for proper balance.

• For optimal use with the top-grade condenser cartridge CPS-40F, it is recommended to pair the arm with the UA-3N/NL and the POD-10 oscillator/detector. For more information, please request a catalog.

Pricing Information

Magnetic Use:

• UA-3N: 14,000 yen
• UA-3NL: 16,000 yen

For Condenser Use:

• UA-3N: 11,200 yen
• UA-3NL: 13,200 yen

Manufacturer Contact Information
Stax Industries Co., Ltd.
Address: 1-25-5 Zoshigaya, Toshima-ku, Tokyo 171
Phone: (981) -72 27

[Darkstar]

Warte ab bis du eine Extrastütze brauchst Chris, dann findest du sie nicht mehr so doof......

Was meinst Du, wie ich mich seit meiner Knie OP fortbewege?

[Jan]

Der lange sieht ja wirklich gut aus

[HighEndVerweigerer]

Der lange sieht ja wirklich gut aus

Ich bin schon immer am suchen, denn das Armrohr läßt sich ganz easy wechseln. Bisher hab ich jedoch kein langes Ersatzrohr gefunden....

Oder man schaut gleich nach einem Stax UA-70. Da hat man auch ein AS mit dran....

@ Chris

Danke für die Übersetzung......

[Darkstar]

Der lange sieht ja wirklich gut aus

@ Chris

Danke für die Übersetzung......

Die Übersetzung war eine Sache von 2 Minuten. Das Cut and Paste ist leider ein Albtraum….

[HighEndVerweigerer]

Der lange sieht ja wirklich gut aus

Ich bin schon immer am suchen, denn das Armrohr läßt sich ganz easy wechseln. Bisher hab ich jedoch kein langes Ersatzrohr gefunden....

Oder man schaut nach einem Stax UA-70. Da hat man auch gleich ein AS mit dran....

Bei Samurai Audio ein Stax UA-70 Armrohr gefunden. Das müßte auch auf den UA-3 passen.....Allerdings kann man sich zu dem Preis mal ganz locker einen ganzen UA-70 ersteigern...