Vinyl Asylum: RE: For anyone who thinks the AT33PTG needs a light arm by John Elison

Vinyl Asylum: RE: For anyone who thinks the AT33PTG needs a light arm by John Elison

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RE: For anyone who thinks the AT33PTG needs a light arm

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John Elison

In Reply to: RE: For anyone who thinks the AT33PTG needs a light arm posted by charlies824 on October 9, 2007 at 10:56:32:

The AT33PTG that I tested had compliance at resonance of 25 x 10 ^-6 cm/dyne. If yours has similar compliance then its system resonance will be no higher than 10-Hz in your low mass tonearm.

I suspect the other person's cartridge in the heavy headshell has a resonance of 4-Hz, which the HFNRR test Record cannot measure because it does not go that low. The second harmonic of 4-Hz is 8-Hz. My guess is that the 8-Hz test tone on the HFNRR test record is triggering the 4-Hz arm-cartridge resonance.

At any rate, if you try to measure arm-cartridge resonance in your system, I would recommend finding a better method than using the HFNRR test record. That test record is really pretty worthless as far as I'm concerned.

Best Regards,
John Elison

Measuring Tonearm Resonance (Open in New Window)

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Topic - For anyone who thinks the AT33PTG needs a light arm - Audio Fan 10:03:51 10/9/07 ( 12)

RE: For anyone who thinks the AT33PTG needs a light arm - charlies824 10:56:32 10/9/07 ( 11)
- RE: For anyone who thinks the AT33PTG needs a light arm - John Elison 10/9/07 13:47:24 10/9/07 ( 9)
  - RE: For anyone who thinks the AT33PTG needs a light arm - charlies824 14:28:28 10/9/07 ( 1)
    - You were right: lateral resonance freq = 10 Hz nt - charlies824 13:04:08 10/11/07 ( 0)
  - RE: For anyone who thinks the AT33PTG needs a light arm - Audio Fan 13:51:14 10/9/07 ( 6)
    - RE: For anyone who thinks the AT33PTG needs a light arm - John Elison 17:35:36 10/9/07 ( 2)
      - RE: For anyone who thinks the AT33PTG needs a light arm - Audio Fan 04:50:59 10/10/07 ( 1)
        
        RE: For anyone who thinks the AT33PTG needs a light arm - John Elison 06:36:58 10/10/07 ( 0)
    - it is probably what they have overstock on and - mattjk 14:58:48 10/9/07 ( 2)
      - RE: it is probably what they have overstock on and - Audio Fan 16:01:38 10/9/07 ( 1)
        
        of course, how many tables out there can actually - mattjk 16:20:45 10/9/07 ( 0)
- RE: For anyone who thinks the AT33PTG needs a light arm - Audio Fan 12:22:20 10/9/07 ( 0)