When a high compliance cartridge is mated with a moderate mass tonearm, resonances in the infrasonic range may occur. Bihari Tonearm QRM PT01 Aluminium Black 125.00 Bihari Tonearm QRM PT01 Aluminium Red 125.00 Bihari Tonearm QRM PT01 Aluminium Gunmetal 125.00 Bihari Tonearm QRM PT01 Aluminium Blue 125.00 Bihari Tonearm QRM PT01 Aluminium Green 125.00 Bihari Tonearm QRM PT01.
#Mitigating scratch on sme tonearm portable
Bihari Tonearm QRM PT01 Aluminium Black 125.00 Bihari Tonearm QRM PT01 Aluminium Red 125. Tonearms and mods for PT01 Scratch and SPiN portable turntables. However, the 309s use ABEC Level 3 bearings. Astheticly, I like the Jelco 750 over the SMEs any day. I am impressed with the sound of the SME 309, but I wonder if I spent too much when compared to the Jelco 750. If a low compliance cartridge is used with a low mass tonearm, undesirable resonances can occur in the audible range. Tonearms and mods for PT01 Scratch and SPiN portable turntables. I am wondering how the Jelco 750 compares against the SME 309 using the same tonearm cable. A hole is cut out from the top board for the motor assembly to emerge. Arms above 25 grams of mass are high mass in nature (Eminent Technology, Dynavector). The Roksan Xerxes transcription turntable (often shortened to Xerxes) is a record player.
Moderate mass tonearms are good companions for moderate to low compliance cartridges.Ī tonearm whose effective mass is rated between 11 and 25 grams is considered moderate mass (e.g. It was purchased from Grahams Hifi London in 1985 and the Linn Ittok LV II Tonearm added in 1987 Pre Cirkus Bearing No corner bracing on plinth. early SME’s, Grace 747, Ortofon AS-309S, RS-309D, TA-110 and TA-210). Linn Sondek LP12 Original Walnut Afromosia Plinth / Linn Ittok LV II Tonearm / Linn Troika MC phono cartridge Interest check on this wonderful ‘unmolested’ Linn Sondek LP12 Original. Low mass arms mate well with both moderately high and very high compliance phono cartridges.Ī tonearm whose effective mass is rated at 10 grams or below is considered low mass (e.g. SME Transrotor 5009 (300 series) Black & Silver Tonearm - Gorgeous and Mint 2600 2600 USD USD. The high mass of the combination needs low mechanical compliance, otherwise record warps can easily provoke tonearm vibrations at frequencies around 4 to 6 Hz, that will bring degradation of performance (at least 8 Hz is advisable)Ī phono cartridge with the compliance in the range of 5 to 10 µm/mN is considered as a very low compliance cartridge, a cartridge with the compliance in the range of 10 to 20 µm/mN is moderate compliance cartridge and a cartridge with the compliance value above 35µm/mN is very high compliance cartridge. When selecting either MC or MM cartridges for your record player, total effective mass of tonearm (including cartridge and headshell) has to be taken into account in relation to the mechanical compliance (elasticity) of the cartridge cantilever system.
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