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speaker protection relay transistor

  1. Isaac C.

    Lafayette LR-3500 DC Offset and Speaker Relay Question

    Hello everyone, I acquired a Lafayette LR-3500 back in February in working condition. Upon acquiring it, I performed some basic servicing. I created this thread in order to figure out how to adjust the bias and did so with success. This receiver does not have a dc offset adjustment but only...
    • Isaac C.
    • Thread
    • dc offset drift lafayette lafayette lr-3500 speaker protection relay transistor speaker relay
    • Replies: 1
    • Forum: Solid State
  2. c.coyle

    Please help me understand this speaker protection circuit

    When it comes to tinkering with electronic stuff, I'm pretty good at "fake it 'till you make it," but my lack of formal training sometimes limits me. I'm trying to get a handle on exactly how this speaker protection circuit works. Please help me. 1. Normal operation: Power on, no DC at R759...
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