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Acoustical Systems UNI Protractor Owner's Manual

Precision phono alignment instrument
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UNI Protractor
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precision phono alignment instrument
owner's manual

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Summary of Contents for Acoustical Systems UNI Protractor

  • Page 1 UNI Protractor © precision phono alignment instrument owner’s manual...
  • Page 2 General note: Technical data, minor design and specifications are subject to change without prior notice. version 16.02...

  • Page 3: Table Of Contents

    A brief introduction Gulliver’s journey – the microcosmos in cartridge set-up Choosing the right geometry for a given tonearm & preparations Using the UNI-Protractor – a step-by-step pictured instruction Adjusting the cantilever and stylus on the template P2S, Azimuth and Overhang Dismounting the UNI-Protractor Summary...

  • Page 4: A Brief Introduction

    A brief introducton Please check your UNI-Protractor set. All the above parts must be included to ensure perfect function. Each UNI-Protractor was carefully checked and The UNI-Protractor is a versatile alignment and tested prior to shipment. positioning instrument for use with phono tonearms and cartridges.

  • Page 5: Gulliver's Journey - The Microcosmos In Cartridge Set-Up

    Gulliver’s journey - the microcosmos in cartridge set-up have contact to the groove’s wall – of 1-2 µm to Microgroove records are exactly what they are 5-6 µm. named – microgroove. The ever so tiny mechanical modulations in the groove’s wall are really small. A 12“...

  • Page 6: Choosing The Right Geometry For

    Choosing the right geometry for a given tonearm groove. This can result - especially in records cut The UNI-Protractor system features a wide close to the inner label - in high distortion figures selection of templates and each of these UNI- towards the end of the records.
  • Page 7 This - BTW ... - is an option to use the The inidvidualized UNI-templates do in most UNI-Protractor to determine the cutting limit of cases follow the manufacturer’s recommenda- your record(s). It is nothing but a “helper” or tions. “indicator” whether your record(s) are rather cut With most tonearms of japanese origin this means following DIN or IEC standard in most cases that they follow DIN and the inner...

  • Page 8: Using The Uni-Protractor - A Step-By-Step Pictured Instruction

    Using the UNI-Protractor - a step-by-step pictured instruction Please note: Mounting of cartridge, balancing of the tonearm and setting of recommended tracking force - VTF- for the given cartridge MUST be made before starting setting up the UNI-Protractor. Step 1 Check whether your turntable’s platter does have a indention around the spindle to accommodate the slightly thicker inner label section of a record.
  • Page 9 Step 3 Now do take the three black POM tt-spindle- adapters. They do only differ in the diameter of their central hole. Each has a different number of circular rings at the grip-top. - 1 ring = 7.10 mm spindle diameter - 2 rings = 7.15 mm spindle diameter - 3 rings = 7.20 mm spindle diameter One –...
  • Page 10 Step 5 Insert the tt-spindle adapter you have found fitting your spindle into the 20 mm cut-out hole in the template of choice. Do insert the tt-spindle adapter like pictured. Due to the special concave cut of the mirrored template it will give a light, tight fit. The grip-line(s) of the tt-spindle adapter will be on top and clearly visible.
  • Page 11 Step 7 The template will fit tight into the long rectangular cut frame in the UNI-Protractor. This works best, when you fix the template with one finger as pictured and lower the main frame starting at the outer rim. You might need a little pressure to firmly fix the main frame down along the outer rim of the UNI- template.
  • Page 12 Step 8 Next please adjust the micrometer to the value figure given on your UNI-template. You can read down the value on the micrometer’s scale. The linear drive will move while you do adjust the micrometer. It will be moved to the exact position required for the specific template’s tangential error curve.
  • Page 13 Step 10 Please insert the positioning arm into the linear drive. There is a matching notch in the top of the black POM block – the moving part of the linear drive. Do insert the positioning arm there. Press it down gently so to make contact with the bottom of the notch.
  • Page 14 Step 12 Now take the magnifier from it’s etui and unfold the magnifier’s parts like pictured. Step 13 Place the magnifier as pictured into the almost square cut-out in the UNI-Protractor’s main frame “south” of the template. Do move the magnifier parallel to the template till the center “locks in”...
  • Page 15 Step 14 Release the tonearm from it’s rest and swing it in position above the zero point on your template. Lower your tonearm till the stylus meets the template’s surface. Please note you must have balanced your tonearm with the mounted cartridge and must have set recom- mended VTF - vertical tracking force - PRIOR TO THESE STEPS !!

  • Page 16: Adjusting The Cantilever And Stylus On The Template

    Adjusting the cantilever and stylus on the template Please note you must have balanced your tonearm with the mounted cartridge and must have set recom- mended VTF - vertical tracking force - PRIOR TO THESE STEPS !! We tried to capture the view on the template with the camera, but these attempts weren’t all that successfull in capturing the actual view on photo.
  • Page 17 Please take your time when adjusting the stylus and cantilever. Move the cartridge ever so slightly. Try to apply as little force as possible and you will get closer and closer to the “sweet spot”. If you really want to get the best possible performance from your cartridge, tonearm and whole analog set-up, it is essential that you align the stylus on the null point and cantilever parallel...

  • Page 18: P2S, Azimuth And Overhang

    P2S, Azimuth and Overhang Use it to determine or check your mounting distance. Put the “zero” at the center of your spindle and try to locate the pivot center of your tonearm. Do measure the distance from the center of your spindle to the pivot center.
  • Page 19 In your UNI-Protractor set you will find a 8mm acrylic azimuth template. However - it is intended to serve only as an opti- cal “helper” and does in no way replace critical adjustment of your stylus’ azimuth by means of a test record with cross-talk signals or similar test options which do deliver the results based on the position of the stylus towards the groove walls.
  • Page 20 Take the tt-spindle adapter suitable for your turntables spindle and put it over your spindle. Place the overhang template over the spindle on top of your spindle adapter. Turn it around the spindle till it’s scale is in line with an imagined line pointing to the pivot of your tonearm.

  • Page 21: Dismounting The Uni-Protractor

    Dismounting the UNI-Protractor After you have aligned your tonearm, please do dismount your UNI-Protractor ONLY in the way pictured and described here. First pull out the spindle adapter. Next press your thunb onto the mirror parallax UNI-template. Now grap your UNI-Protractor main frame on the left rim and lift it up while still pressing down the UNI-template.

  • Page 22: Summary

    Summary The final sonic result of a tonearm alignment is 90% attention to detail and 10% patience. Do take your time when aligning a tonearm/car- tridge. You need a calm hand and a sharp eye (the magnifier will help you with the later ...) - and time.
  • Page 23 Now enjoy your records!
  • Page 24 & design: acoustical systems Distributed by: Manufactured and assembled in Germany for further infomations: www.acoustical-systems.com info@acoustical-systems.com...