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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
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In Reply to: Re: MC Step Up Questions (fairly long) posted by A4 Owner on December 6, 2004 at 14:11:08:
The load seen by the cartridge is is the input impedance of the phono stage transformed according to the MC transformer step-up ratio. If the voltage step-up ratio of the transformer is 10, then the impedance ratio is 100. So the 47K input impedance of most phono preamps is seen by the cartridge as 47K/100 or 470 ohms. If you want to change this load to 300 ohms, you parallel the 47K input resistor with another resistor, which in combination give 100 x 300 ohms or 30K. This additional resistor is 83K.
Kevin Carter
K&K Audio
www.kandkaudio.com
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Follow Ups
- Re: MC Step Up Questions (fairly long) - KevinC 05:38:21 12/07/04 (0)
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