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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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In Reply to: RE: Variables posted by MP on December 20, 2022 at 11:14:00:
Read it somewhere that one could increase phono stage impedance from 47K to 100K or higher to give higher primary load that cartridge sees and increase efficiency (gain). Do I understand correctly?
I don't think so. You have to load the transformer correctly in order for it to express its turns ratio correctly. If the load value is too high, the inter-winding capacitance starts to play a role and the frequency response won't be as flat.
I would check with the manufacturer and see if they have a recommended network for loading with your cartridge. Don't forget that the capacitance of the phono cables also plays a role- for this reason the output cable should be as low capacitance as possible!
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Follow Ups
- RE: Variables - Ralph 11:26:45 12/20/22 (2)
- RE: Variables - MP 04:30:19 05/05/23 (0)
- RE: Ralph, thank you. Very informative. NT - MP 13:33:11 12/20/22 (0)
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