#Protractor app how to
#Protractor app pdf

The vinyl engine also hosts a database of nearly every turntable, cartridge and tonearm ever manufactured along with their specifications and in many cases both instruction and technical manuals, as well as a range of tools for calculating optimal cartridge alignment, tonearm mounting position and tonearm / cartridge resonant frequency. Other protractors can be downloaded from the Vinyl Engine. While a little crude, this protractor works well if you don’t know the specific pivot to spindle mounting distance of your turntable and if your turntable wasn’t provided with an alignment gauge. Rega Lofgren A Arc Protractor Universal 2-Point ProtractorĪ universal protractor can be found at and is a simple 2-point protractor which can be used with virtually any cartridge combination to achieve a baerwald alignment. Most Rega arms follow the 222MM mounting standard, including the RB300, 301, 303, 330, 808, 2000 and many others. Technics Lofgren A Protractor Rega Lofgren A (Baerwald) ProtractorĪ Lofgren A protractor for Rega arms mounted at 222MM, aligning to the IEC standard null points of 66 and 120.9MM.

This protractor will work with any tonearm with a mounting distance of 215MM. This alignment offers less RMS and peak distortion than the factory Technics alignment, though you may find the difference to be subtle at best. When aligned, the cartridge will sit further forward in the headshell, angled slightly inwards. Technics 1200 Protractor Technics Lofgren A (Baerwald) ProtractorĪnother protractor for the Technics, this time aligning to the Lofgren A or Baerwald alignment, with IEC standard null points of 66 and 120.9MM. When aligned, your cartridge body should be parallel to the headshell, with the distance between the tip of the stylus and the rubber washer at the rear of the headshell exactly 52MM. This protractor offers an extremely accurate way to align your cartridge using the Technics null radii of 58.8 and 113.5MM, resulting in an overhang of 15MM and an offset angle of 22 degrees, exactly as specified by Technics. This protractor will align a cartridge to the factory Technics alignment, the same that is achieved when using the supplied overhang gauge. If not, a Lofgren A protractor usually offers the best performance across a majority of LP records. If your turntable manufacturer specifies an alignment, it is best to stick with their recommendation. In reality the distortion figures are so low as to be of little issue. Stevenson alignments are optimised for zero tracking distortion in the lead out groove of the record at the expense of slightly higher distortion everywhere else. Lofgren A or Baerwald alignment spreads the distortion across the surface of the record, resulting in the lowest average distortion figures. The 2 alignment geometries are calculated to minimise tracking error and distortion.

There are 2 popular alignment families, known as Baerwald (or Lofgren A) and Stevenson. You’ll also want to print the protractors to scale, which you can verify by measuring the provided points on the protractor. Be sure to choose a protractor that matches your arm or turntable, as the accuracy of these protractors relies on the pivot to spindle distance being correct.

#Protractor app pdf

13.1.4 Rega Lofgren A (Baerwald) Protractorīelow are some downloadable PDF arc protractors, used to align a cartridge to various standard null radii.

13.1.3 Technics Lofgren A (Baerwald) Protractor.

13.1.2 Technics 1200, Technics Alignment.

10 Turntable, Tonearm and Cartridge Specifications.

#Protractor app how to

7 How to Install and Align a Turntable Cartridge.4 Should You Buy an All-In-1 Turntable?.