Realistic 42-2101/42-2101-a Phono Preamps

Discussion in 'Audio Hardware' started by Robin L, Aug 12, 2015.

  1. scompton

    scompton Forum Resident

    Location:
    Arlington, VA
    The Realistic STA-2200 receiver uses MOSFETs. Sounds nice too.
     
  2. UnmarkedBill

    UnmarkedBill New Member

    I ended up with this Realistic 33-1057a, a little later I suspect, but similar stuff inside? I noticed the schematic of the 42-2101 calls for C1327 transistors, mine has C1815 transistors, are these also a FET? Would you suspect this preamp is comparable to the 2101 or 2101a sonically?

    <blockquote class="imgur-embed-pub" lang="en" data-id="a/uSPIn"><a href="//imgur.com/uSPIn"></a></blockquote><script async src="//s.imgur.com/min/embed.js" charset="utf-8"></script>
     
  3. UnmarkedBill

    UnmarkedBill New Member

  4. WestGrooving

    WestGrooving Forum Resident

    Location:
    California, U.S.A
    I have the 42-2101A and believe it uses a pair of BJT NPN transistors for each channel.
     
  5. Mileater

    Mileater New Member

    Location:
    Wisconsin
    the 42-2101a and 42-2109 upgraded are excellent, they perform way past there value!!
     
    Last edited by a moderator: Jun 3, 2018
  6. Paul Lancaster

    Paul Lancaster Member

    Location:
    Trenton, TN
    Would you mind sharing how it's been upgraded? Re-cap, power supply, etc.
     
  7. harby

    harby Forum Resident

    Location:
    Portland, OR, USA
    Here's my attempt at making the schematic diagram for this thing legible

    [​IMG]
     
    qwerty, ranch 22b and cmarti like this.
  8. Paul Lancaster

    Paul Lancaster Member

    Location:
    Trenton, TN
    Thanks harby, appreciate that.
     

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