Sennheiser MD421U transformer measurements

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VanguardAudioLabs

VanguardAudioLabs

Well-known member
Joined
Jul 2, 2024
Messages
90
Location
Montclair CA
Anyone have any info on the inductance/resistance of the two coils? it's used for the rolloff switch.

I have an MD421U on my desk and the internal transformer is unsalvageable. Wires are broken off deep inside under the windings and i'm unable to take measurements.

TIA!
 

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