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Vinyl Asylum: Depends on the cartridge current. by Mark Kelly Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum: Depends on the cartridge current. by Mark Kelly Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: Depends on the cartridge impedance. posted by garth on December 2, 2005 at 21:05:15:
The first cartridge has a short circuit output current of 10 microamps, the second has 100 microamps. A voltage amplifier would see tham as almost the same, a transimpedance amplifier sees the second as having ten times the ouput of the first.It's a bit like the difference between a garden hose and a fire hose, both operating at the same pressure. If you just measure the pressure, they are the same. If you measure the flow, they are not.
In this analogy a transimpedance amplifer is like a turbine wheel - it doesn't much care about the pressure, it responds to flow rate.
Mark Kelly
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Topic - advice for replacement phono stage - sonicbath 09:03:25 12/2/05 ( 19)
- Trichord - 213Cobra 23:23:08 12/2/05 ( 0)
What phono stage is going to give you 72dB? None. - garth 13:46:37 12/2/05 ( 11)
- Re: What phono stage is going to give you 72dB? None. - sonicbath 23:36:22 12/2/05 ( 0)
47 labs phonocube! - stark 17:36:39 12/2/05 ( 9)
- Wrong! - garth 18:19:18 12/2/05 ( 8)
- hmm very interesting - stark 20:40:20 12/2/05 ( 2)
- Depends on the cartridge impedance. - garth 21:05:15 12/2/05 ( 1)
- Depends on the cartridge current. - Mark Kelly 12/2/05 21:54:42 12/2/05 ( 0)
- Transfer function - Mark Kelly 20:39:25 12/2/05 ( 4)
- Great, so what does that mean for normal persons? - garth 20:59:29 12/2/05 ( 3)
- Transfer function again. - Mark Kelly 21:46:16 12/2/05 ( 2)
- thank you! - stark 11:17:18 12/3/05 ( 1)
- A little more complex - Mark Kelly 14:54:33 12/3/05 ( 0)
A step up (no pun intended). - jsm 11:26:28 12/2/05 ( 2)
- Re: A step up (no pun intended). - sonicbath 10:25:28 12/3/05 ( 0)
Re: A step up (no pun intended). - sonicbath 23:38:34 12/2/05 ( 0)
Re: advice for replacement phono stage - VFR800A 11:22:29 12/2/05 ( 0)
Re: advice for replacement phono stage - HenryH 11:06:29 12/2/05 ( 0)
Suggestions - Jorge F 10:09:54 12/2/05 ( 0)
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