JRC 4558D

Discussion in 'Effects, Pedals, Strings & Things' started by guitarmv, Dec 16, 2009.


  1. guitarmv

    guitarmv Member

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    I just dismantled an old stereo and found a JRC 4558D OpAmp, wondering if it is the Holy Grail.

    Thanks
     
  2. Jet Bycraft

    Jet Bycraft Member

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    What was the brand name of the old stereo that you dismantled?
     
  3. yeahyeahyeah

    yeahyeahyeah Supporting Member

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    nope, I'm sure they are still made in the same factory now as they were in the 80's

    you can still use it though, if you want.
     
  4. dsmc80

    dsmc80 Supporting Member

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    There are some good and some not so good opamps, but the overall greatness of the sound lies in the surrounding circuit for the most part.

    ....So is it the "Holy Grail"? Not really.
     
  5. guitarmv

    guitarmv Member

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    Jet, ROTEL

    [edit] RX2001
     
    Last edited: Dec 16, 2009
  6. Deville2Rocket

    Deville2Rocket Member

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    Yeah, the op amp isn't anywhere near as important as people make it out to be.
     
  7. guitarmv

    guitarmv Member

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    They seem cheap enough, but I like the thought of pulling viable ones out of non-working equipment. Is it nonsensical to pull electronic bits like that? I know that caps aren't usable or likely to be, but other components? Is it asking for trouble?
     
  8. yeahyeahyeah

    yeahyeahyeah Supporting Member

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    Tinkering with electronics is probably the cheapest hobby you can have these days. parts are worth less than cents.

    That said go for it, as long as the part doesn't looked like it has burned or will burn in the near future.
     
  9. IvIark

    IvIark Member

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    Caps are actually pretty high up my list of things to salvage. There's not much point with standard carbon or metal film resistors because they're so cheap anyway, but a well placed tone cap can have a lot more affect sonically than swapping opamps or transistors. You never know what results you'll get out of some old and unknown caps you might find.
     
  10. drbob1

    drbob1 Silver Supporting Member

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    Good opamp, still made, so not a holy grail. If you have a TS9 with another op amp, try switching and see what you think?
     
  11. guitarmv

    guitarmv Member

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    I always seem to get good advice from Dr Bobs.
     
  12. guitarmv

    guitarmv Member

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    Unfortunately these are soldered straight to the board, but, dammit, I am gonna try not to hurt them. I got about 8 RC4558's that were installed in sockets, not sure but I think the logo is Texas shaped.
     
  13. guitarmv

    guitarmv Member

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    And an RCA 845, but it is also the name of a tube, so I cant find info on it.
     

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