jonathanb wrote:Specifications for most current VPI arms can be found here: http://www.vpiindustries.com/tonearms. Specifications for the Delos can be found here: http://www.lyraconnoisseur.com/Products/Products_Analog/Delos/delos3.html.
tony22 wrote:VinBob, 0.5g for the fasteners? The SS nylon screws, the lightest ones in the bunch, are 1.04g for the pair.
VinBob wrote:Thanks for the feedback all - So the question still remains, am I using the correct value of '12' for the compliance parameter for the calculator on Vinyl Engine even though the Lyra specs are based on 100Hz and not 10Hz as required on the Vinylengine tool?
Cheers,
Vincenzo.
Brf wrote:VinBob wrote:Thanks for the feedback all - So the question still remains, am I using the correct value of '12' for the compliance parameter for the calculator on Vinyl Engine even though the Lyra specs are based on 100Hz and not 10Hz as required on the Vinylengine tool?
Cheers,
Vincenzo.
The VE calculator assumes that the quoted cartridge compliance is referenced to 10Hz. The Lyra Delos compliance is referenced at 100hz. You need to convert the Lyra compliance to 10hz. A general rule is 1.5 to 2 times the 100hz figure to approximate the 10hz.
12x10⁻⁶Cm/Dyne @100hz = 18x10⁻⁶Cm/Dyne to 24x10⁻⁶Cm/Dyne @10hz
1) At 18x10⁻⁶Cm/Dyne and using 17.3g (eff. mass + cart weight + fastener weight)
Resonant Frequency: 158 / sqrt(311) = 8.95 hz
2) At 24x10⁻⁶Cm/Dyne and using 17.3g (eff. mass + cart weight + fastener weight)
Resonant Frequency: 158 / sqrt(415) = 7.75 hz
Potential resonance frequency: 7.75 to 8.95 Hz
You're fine!
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