Rega Power Supply Unit

Discussion in 'Audio Hardware' started by Jomay, Dec 7, 2019.

  1. Jomay

    Jomay Well-Known Member Thread Starter

    I have a brand new Rega RP8, straight from Music Direct. It came with the Rega TTPSU. I have a Rega Neo which I would like to use instead. However, the Neo when connected to the RP8 spins more than 25% faster than it should. When I connect the TTPSU that came with the RP8 it spins at 33.31 rpm. I know the Neo pairs with the RP8. I also know the Neo works fine with my Rega P3, so why would it be spinning so much faster on the RP8. When the button on the Neo is set to 45rpm it spins even faster. I've restored the the Neo to factory settings but that has had not real effect. What would cause the Neo to behave this way when paired with the RP8?
     
  2. Davey

    Davey made a machine by describing the landscape

    Location:
    SF Bay Area, USA
    I'd guess you have a 50Hz Rega RP8/TTPSU and a 60Hz NEO. There's an internal jumper in the NEO to change settings.
     
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  3. Jomay

    Jomay Well-Known Member Thread Starter

    Indeed and my Neo manual confirms 60Hz. Is converting the Neo to 50Hz a simple tweak a novice could do?
     
  4. Davey

    Davey made a machine by describing the landscape

    Location:
    SF Bay Area, USA
    Well, I don't think it's intended to be user selectable, but I don't know how easy it is to get at it ...

    The Neo TTPSU is factory set for 50/60Hz at 33 RPM and 67.5/81Hz at 45 RPM. There is an internal jumper (SK2) that selects 50Hz (jumper out) or 60Hz (jumper in). You must cycle power after changing the jumper... Rega
     
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  5. Strat-Mangler

    Strat-Mangler Forum Resident

    Location:
    Toronto
    Switching a jumper is easy. Pull it off, push it into the right set of pins. The part which may or may not be difficult depending on how it's manufactured is opening the unit up to gain access. In some cases, it's as easy as using a screwdriver. Sometimes, manufacturers can use proprietary parts, make the device almost impossible to access unless it's brought to their service center, or uses hex screws where you'd need to purchase the proper tool so they can removed.

    Once it's removed, it's easy-peasy. Now, *please* keep in mind I wasn't able to find a picture illustrating your unit's internals but am solely showing one of another TTPSU to show what it may look like, where it could be located, that there might be a legend printed on the circuit board, etc.

    https://soundorg.com/content/Rega_Info/THE_ILLUSTRATED_GUIDE_TO_THE_TTPSU.pdf
     
  6. harby

    harby Forum Resident

    Location:
    Portland, OR, USA
    Go figure out the crazy logic of putting a 50Hz motor in a US turntable... along with a dual 24V AC/20V DC power supply, requiring a $350 speed controller with frequency generator instead of just a 24V wall transformer:

    If your 'table was purchased in the US & originally came stocked with a NEO-PSU or TT-PSU (P7, RP40, RP6, RP8, Planar 6), order the Neo in 50Hz.

    Some photos shows a sticker above the power output, labeled "turntable frequency", that may allow some models a simpler switch to 50Hz. There is also the aforementioned jumper that may be present on other models but doesn't seem indicated for the Neo.

    I also can't answer what you'll find inside. Without a switch or jumper being discovered, the mainboard may need modifications such as crystal, frequency divider, or firmware to turn it into the other version. As per another forum post:

    Actually, as far as I’m aware, there are 50Hz and 60Hz (@33.3 rpm) versions of the Neo to suit the decks from each market. It was certainly the case with the TT-PSU MK2, I’ve repaired a couple of those and there are some minor component differences between the two.
     
  7. vinnn

    vinnn Forum Resident

    Location:
    England
    Rega's are British turntables and like the majority of the world, we in England run 240V @ 50Hz. I get there's a big market in the US but there is a world outside of the US and the Canada/America mainland uses different power to most other countries.
     
    Last edited: Dec 8, 2019
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  8. MGW

    MGW Less travelling, more listening

    Location:
    Scotland, UK
    All of this will be news to some (many)!
     
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  9. vinylontubes

    vinylontubes Forum Resident

    Location:
    Katy, TX
    What's you're point? The USA had electricity first thanks to Ben Franklin, Thomas Edison, and Nicola Tesla.
     
  10. Bob_in_OKC

    Bob_in_OKC Forum Resident

    Location:
    Dallas
    Using the 50 Hz pulley in North America doesn’t cause the need for the Neo. The Neo is bundled with certain models. On those models, they leave the Neo and the turntable configured for 50 Hz even when it’s going to North America. As can be seen in the earliest posts in this thread, there have been several models bundled with a Neo or Rega TTPSU and were therefore equipped with the 50 Hz pulley.
     
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  11. MGW

    MGW Less travelling, more listening

    Location:
    Scotland, UK
    Sooooo, you had it first, which is a highly debatable point anyway (in fact the UK had the first public electricity supply and use) so everything made globally should immediately confirm to you rather unusual standard? :thumbsdow
     
  12. Meehael

    Meehael Well-Known Member

    Location:
    Slovenia
    [​IMG]

    I think you just have to bridge that jumper marked with arrow, then trim te pots for lowest noise. But I'm not 100% shure.
     
    Last edited: Dec 9, 2019
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  13. Davey

    Davey made a machine by describing the landscape

    Location:
    SF Bay Area, USA
    Well done!
     
  14. Tartifless

    Tartifless Forum Resident

    Location:
    France
    That's trumping history !
     
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  15. vinnn

    vinnn Forum Resident

    Location:
    England
    Ha, indeed. It's almost like Micheal Faraday and all those European dudes that pioneered alternating current never existed.
    :cheers:
     
    Last edited: Dec 9, 2019
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  16. MGW

    MGW Less travelling, more listening

    Location:
    Scotland, UK
    Added to which Tesla was, of course, a Croatian Serb!
     
  17. MGW

    MGW Less travelling, more listening

    Location:
    Scotland, UK
    Trumping as in "That's fake news!"
     

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