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In Reply to: Re: I would use blu- tac cut into 0.5 gram weights. posted by Garth on September 13, 2006 at 10:24:34:
It will take on the average about 5-7 grams additional mass to change the resonant frequency 1Hz.
Garth, how do you get to 5-7g per Hz?
Calculating the resonance for JMW9 (7.7g + 1g for mounting) with Denon DL103R (8.5 g, ca. 10Cu), I get a frequency of 12.14Hz. Adding 3 g effective mass gives me a resonance at 11.2Hz.
From that I would estimate 3-3.5g to change the resonance by 1Hz.
Rene
Die gefährlichste Weltanschauung ist die Weltanschauung derjenigen, die die Welt nicht angeschaut haben.
Alexander von Humboldt (1769-1859)
Follow Ups:
I am not sure whether the added mass is making things worse or lowering the resonance from 12 to 11 makes things much better. Probably the first.Anyway, measuring my JMW 9(+3g) with 103R I get a resonance frequency of around 9 Hz (measured with the HFN&RR test record). I guess I can safely remove that "dead" weight :)
Die gefährlichste Weltanschauung ist die Weltanschauung derjenigen, die die Welt nicht angeschaut haben.
Alexander von Humboldt (1769-1859)
The cartridge compliance changes things too.Sorry, I didn't say it was specifically for your example above.
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