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Naim MC phono stage for Linn cartridge - connection guide

Discussion in 'audio' started by will1124, Aug 1, 2021.

  1. will1124

    will1124 pfm Member

    Hi fishers, I bought this a couple of years ago until recently I got a chance to try it. Does anyone know how to connect it to make it work?

    Appreciate your help here.

    Here is how the phono stage looks like, a very early version built by Naim.

    https://ibb.co/FKvXnn9
     
  2. Charlie_1

    Charlie_1 pfm Member

    If no one knows then I'm sure someone on the Naim forum, like Richatd Dane, will know.
     
  3. Beobloke

    Beobloke pfm Member

    Sorry, but unless I’m being very thick, you haven’t actually said what it is that you’ve bought. The link in your message won’t open for me.
     
  4. colasblue

    colasblue pfm Member

    It's a Naim PNAG moving coil headamp.

    What you do is connect your turntable with MC to the inputs and the output goes to an amplifier's MM input.

    It's not a complete phonostage since it has no RIAA equalisation. It replaces an MC step up transformer.
     
    will1124 and Charlie_1 like this.
  5. Charlie_1

    Charlie_1 pfm Member

    Any idea when they made that then colasblue?
     
  6. colasblue

    colasblue pfm Member

    Mid 70's I'd guess, about the same time as the Linn Trak cartridge was introduced. It was to allow users of "lesser" amplifiers to access the benefits of MC cartridges. It was superseded by the Linn Linnk which was a full MC phonostage to connect to the aux input.
     
    Charlie_1 likes this.
  7. Craig B

    Craig B Re:trophile

    Yes, not to be confused with NAG-20 which was internally powered via a 9V battery, rather than via the included NAPS of PNAG.

    Q: Why '-20' when the gain is 25dB?

    A (with a question): How many matches in a matchbox?

    NAG = Naim Audio Gain
    PNAG = Powered Naim Audio Gain

    Naim NAG-20 (Sold as 'Linn Pre-Amp')
    [​IMG]
     
    Last edited: Aug 1, 2021
  8. Craig B

    Craig B Re:trophile

    Naim's first external power supply, NAPS.

    [​IMG]
     
    Charlie_1 and MJS like this.
  9. will1124

    will1124 pfm Member

    Thanks all, I will try it this weekend. Hopefully to make it sing, finger crossed!
     
  10. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    I binned one of those
     
  11. Craig B

    Craig B Re:trophile

    I'm having one of those feelings of dèjá vu where one recalls having a feeling of dèjá vu about having heard something before that.
     
  12. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    You know, I've had that feeling before...
     
    Craig B likes this.
  13. Bob McC

    Bob McC Living the life of Riley

    The linn trak was introduced in 1982 not the seventies.
     
  14. Craig B

    Craig B Re:trophile

    I was going to post...

    Ahem... Asak DC2100K!

    ...yesterday, but though I'd used up my pedantic post quota for the week.

    Good on you, Bob.
     
  15. peterm

    peterm pfm Member

    I have a pamphlet, in my box of things I should have thrown away but didn't, covering "The Linn Disc Playback System" covering LP12, Ittock, Asak and on the back page the "Linn Moving-Coil Preamplifier" made by Naim Audio and exactly as shown in the first post.
    On the bottom of the first page it says "Copyright 1980 Audiophile Systems".
     
  16. Craig B

    Craig B Re:trophile

    Hello Peter,

    Audiophile Systems, of Indianapolis, IN, were the original Linn/Naim distributor in America.

    They also published a newsletter entitle 'BIASED', which it certainly was, although it was also so well crafted that reading a single issue spontaneously caused one to become a 'Linnie'.

    The Oracle
     
    peterm likes this.
  17. peterm

    peterm pfm Member

    Hi Craig,

    No idea where I got my copy then!
     
  18. Craig B

    Craig B Re:trophile

    Were I a real Oracle, I could tell you, Peter. :p

    Although, I suspect that Linn HQ would have gladly spread the bumf around rather thickly, even on the home turf.
     
    Last edited: Aug 3, 2021
    peterm likes this.
  19. peterm

    peterm pfm Member

    Going back to the thread title, "connection guide" suggests confusion over what goes where.

    As colasblue explained in #4, tt leads into the RCA sockets on the preamp, RCA plugs (perhaps changed or at least cleaned up a bit) on captive leads into phono input on your amp and the 4 pin DIN plug on the other captive lead into the left hand DIN socket on the power supply as shown in the photo.
    All pretty simple.

    Perhaps confusion arises over what goes into the right hand DIN socket - NOTHING!
    That socket is present only because this was after all a standard Naim preamp power supply and followed Naim's convention of sending the preamp output to the power amp input via an internal connection inside the power supply. There is no voltage on the right hand socket (signified by NC - no connection - on the pin out diagram on the housing) and in a non Naim system it serves no purpose.
     
    will1124 and Craig B like this.
  20. Craig B

    Craig B Re:trophile

    @will1124,

    If the picture is of your actual device, those Deltron RCAs are one of the best designs ever and should clean up nicely. I rarely use anything else, and have done so for decades, although these are getting harder to find.

    P.S. You may want to lift the lid on the NAPS (power supply) and check that the reservoir capacitor isn't leaking (i.e. the blue cylinder in the picture I posted above). Just make sure that it has been unplugged for a while before attempting inspection, as these wee things can knock one on one's arse.
     
    will1124 likes this.

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