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BIAS for Sennheiser Orpheus

Pirx
in Headphone Amplification

Featured Replies

Hi

I am going to build energizer for Orpheus and Stax with LL9202AM.

For Stax I will copy PSU Bias from T1.

I wonder if I can use the same kind of PSU from T1 for Orpheus (with lower voltage of course)?

I think so, but it could be very expensive mistake if I am wrong ...

Any advice?

http://farm3.staticflickr.com/2891/9135996783_0911380a26_o.jpg

Edited by Pirx

  • Quote

    The T1 bias supply is just a voltage doubler with a divider.  Just set it to 500V and with a 10M ballast resistor and you'll be fine. 

  • Quote
    • Author

    I wasn't sure how large should be this "ballast" resistor.

    Thanks Spritzer, I can always count on you :)

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