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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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PHONOGRAPH TONEARM sa PHONOGRAPH CARTRIDGE & STYLUS x PICKUP ARM (PHONOGRAPH) x TONEARM (PHONOGRAPH) xx PHONOGRAPH Cable capacitance of various pickup arms are listed. Modify the auto shut off switch on a RABCO ST-4 turntable so it will switch the unit's motor off and prevent possible arm drift. A do-it-yourself tonearm features a balsa wood shaft, magnetic anti-skating device, and ball bearing pivot. Tip on cleaning the Rabco tonearm contacts to stop it from raising prematurely. Tip on preventing a light-weight tonearm from swinging to the wrong side of the record, thus damaging the stylus. Modifying the SME 3009 phono cartridge headshell to reduce its mass from 5.5 grams down to 3.5 grams. The praying mantis tonearm. A split-arm design that is almost 20" long. Made from balsa wood, wire, thread, etc. Simple method of measuring low frequency resonance occurring between the cartridge compliance and the effective mass of the tonearm and cartridge combination. Modifying the Rabco SL8E tonearm. Modifying the AR (Audio Research) turntable for other tonearms. Shows installation of the Decca arm on the AR turntable with the Lyre lift. Table of optimum offset and overhang calculations for tonearms from 8" to 20" long (in increments of 0.25"). Tip on lightening the headshell weight of a Keith Monks KMAL M9BA Mk.2 tonearm. Modifying the Formula-4 tonearm to reduce headshell and arm resonances. Component interfaces. Part 2. Cartridge interface with tonearm and tonearm interface with turntable. Component interfaces. Part 3. Setting up universal pickup arms Technique for leveling the headshell of a tonearm using a small spirit level. Phonograph arm geometry. A simple graphical layout method to build an arm with low-tracking-error. Technique for measuring capacitance of tonearm output cables (using 60Hz test signals) without getting false readings. Tips on modifications to reduce tonearm or headshell resonances that occur in the audio band. Improving Rabco's ST-4 tonearm. A tangential tracking tonearm. Modifying the original AR (Audio Research) tonearm. Modifying the TP-16 Mark III tonearm found on some Thorens turntable systems to improve the sound quality and structural rigidity. On the mechanics of tonearms. Part 1. General principles and static balance. On the mechanics of tonearms. Part 2. Effective mass. Arms and turntables. A review of the geometry and physics of trying to track a pickup arm across a rotating phonograph record with the least number of problems. Turntable design. Part 1. Better pick-up arm performance. Details on the Thorens approach to pickup arm (tone arm) design. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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