Look at this one:?? One of my reasons for choosing the OPA1642 was idle current. The OPA1633 ?has >10ma which for a phono preamp with external supply is not an issue?
Best Regards,
Jules Ryckebusch?
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On Apr 7, 2025, at 21:32, Richard Lee via groups.io <ricardo_lee@...> wrote:
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It's actually for a Jurassic application with of no modern importance;? RIAA MM preamps in DIYaudio.? I'm surprised that NE5534 is still one of the best for this; slightly beaten only by $$$ OP627 or Unobtainium NJM2068.
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In theory, a FET OPA with <3.5nV/rtHz & low 1/f, popcorn noise bla bla should trounce 5534
