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Inductance coupling between chokes

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mig-ru

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Joined 2002
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Hey,

I recently redid my phono power supply with three chokes, with three stages. The last two chokes are parallel to each other, the second choke (mid voltage) produces 4-5mVAC, while PSU Designer shows choke one with way below 1mVAC. My question is, since there is excessive output noise now from the preamp (used to have, LC,LC,RC PS stages), could there be inductance coupling occuring between the last two chokes (overall inductance is now greater, so this came as a surprise, all I can think of is coupling)?

Thanks,

Dmitry
 
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