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op-amp

  1. oranda

    The best phono preamp under $1000 (aka the Hagerman Bugle upgrade thread)

    A bit of a bombastic title, but after owning and building multiple different phono preamps, I’d like to share what just might be the best phono preamp available for under $1000. Known to many of us, the Hagerman Bugle 3 is a well-designed phono preamp that features a split-passive RIAA filter...
  2. D

    LF356N OP-AMP Equivalent

    HI, I'm in the early stages refreshing an old PL 400 Series II power amp - new filter caps, new diode bridge with capacitor mod, speaker protection, and control board rebuild. There are a pair of LF356N op-amps on the control board that I want to upgrade to new. I have a pile of new op-amps...
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