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dh-500

  1. audio_exp

    Hafler DH-500 Bias Procedure

    What is the bias procedure for an early stock DH-500? (Earlier model without DC offset pot.) -How many mV for correct bias? -What fuse is the test point? I don’t see a final bias setup section in the factory manual like other Hafler models? John
  2. thorpej

    Odd behavior doing a slow-bring-up of a Hafler DH-500

    A friend recently dropped off a Hafler DH-500 that he recently acquired in unknown working condition. It appears to be in very good original shape, modulo missing one of the speaker fuses. But because he knows it hasn't been powered up in some time, he asked if I'd do a slow-start on it to...
  3. mrhandlin

    Hafler DH-500 - bridge rectifier? recommendations?

    Thanks in advance for your help. It's great to be part of a community of like-minded individuals. I've recently recapped an old Hafler DH-500. It's a bit unusual in that it has the pc10a version of the boards which don't quite match the manual available online. Anyhow, I've recapped it and...
    • mrhandlin
    • Thread
    • bridge rectifier dh-500 diodes fred type bridge rectifier hafler snubber
    • Replies: 11
    • Forum: Solid State
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