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Thread: what rating is this speed pot?

  1. #1
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 4,737
    I'm jamie.

    Default what rating is this speed pot?

    i would like to change the 2 speed potentiometers on my pioneer turntable,the markings on both pots are as follows, NOBLE KCS -004-0 B500 Ω A=G
    anyone know what rating they are please?
    My System
    John Wood KT88 Amp.
    Paradise Phono Stage
    Sony TTS-8000 Turntable.
    PMAT-1010 MK6 Tonearm.
    Ortofon Cadenza Bronze
    Sony X555ES Cd Player
    Yamaha NS1000m Speakers

  2. #2
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,625
    I'm Geoff.

    Default

    Do they need changing Jamie?
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  3. #3
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 4,737
    I'm jamie.

    Default

    well they work but i just want to rule them out in diagnosing my slight speed fluctuation
    My System
    John Wood KT88 Amp.
    Paradise Phono Stage
    Sony TTS-8000 Turntable.
    PMAT-1010 MK6 Tonearm.
    Ortofon Cadenza Bronze
    Sony X555ES Cd Player
    Yamaha NS1000m Speakers

  4. #4
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 99,005
    I'm Grant.

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    500 ohm presumably.. test it on a meter. Trim pots. You should be able to pick them up easy enough. Unusual for them to be completely goosed. They can end up with wear points, usually just where you want it to be though
    Regards,
    Grant .... ؠ ......Don't be such a big girl's blouse

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    FIIO K7 BT, M11 PLUS, BTR7, KA5 - OPPO BDP-103D - PANASONIC UB450 - PANASONIC 4K ULTRA HD TV - PIXEL 6 - AVANTREE LR BLUETOOTH - 2* X600 SOUNDCORE - HEADPHONES INCLUDE, FIIO, NURAPHONES', FOCAL, OPPO, BOSE, CAMBRIDGE, BOWER & WILKINS, DEVIALET, MARSHALL, SONY, MITCHELL & JOHNSTON - 2*ZBOOK'S- MERCURY BD ROM, ROON, QOBUZ, TIDAL, PLEX, CYBERLINK, JRIVER - MULTI HDD'S -

    Oh my god! There's nothing wrong with the bidet is there?

    “Nothing discloses real character like the use of power. It is easy for the weak to be gentle. Most people can bear adversity. But if you wish to know what a man really is, give him power. This is the supreme test. It is the glory of Lincoln that, having almost absolute power, he never abused it, except on the side of mercy".

    “You see these dictators on their pedestals, surrounded by the bayonets of their soldiers and the truncheons of their police ... yet in their hearts there is unspoken fear. They are afraid of words and thoughts: words spoken abroad, thoughts stirring at home -- all the more powerful because forbidden -- terrify them. A little mouse of thought appears in the room, and even the mightiest potentates are thrown into panic.”

    "You don't have free will. You have the appearance of free will.”

    “There's a war out there, old friend. A world war. And it's not about who's got the most bullets. It's about who controls the information. What we see and hear, how we work, what we think... it's all about the information!”


    ***SMILE, BE HAPPY***

  5. #5
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 4,737
    I'm jamie.

    Default

    yes grant that's exactly the trouble,you get them set right then the strobe starts creeping to the left,adjust them and it creeps to the right,if you get it right it seems to just wobble,which is why i want to replace them to rule them out.
    i think the problem i have is finding the right shaft length.
    My System
    John Wood KT88 Amp.
    Paradise Phono Stage
    Sony TTS-8000 Turntable.
    PMAT-1010 MK6 Tonearm.
    Ortofon Cadenza Bronze
    Sony X555ES Cd Player
    Yamaha NS1000m Speakers

  6. #6
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 99,005
    I'm Grant.

    Default

    The pots on my slatedeck (uses an old techy dd motor)were same. I cleaned them and worked them for an age ..made sure tge wipes were tight and got them set pretty good within a 2 turn a minute which is close enough. I used a fancy speed testing unit. Fires a light at the platter. Now set they are stable, so i just dont touch em lol. But need serviced/ replaced really, along with caps etc. But while its working so well i just left it til it plays up..


    Maybe look for an old donor deck
    Regards,
    Grant .... ؠ ......Don't be such a big girl's blouse

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    FIIO K7 BT, M11 PLUS, BTR7, KA5 - OPPO BDP-103D - PANASONIC UB450 - PANASONIC 4K ULTRA HD TV - PIXEL 6 - AVANTREE LR BLUETOOTH - 2* X600 SOUNDCORE - HEADPHONES INCLUDE, FIIO, NURAPHONES', FOCAL, OPPO, BOSE, CAMBRIDGE, BOWER & WILKINS, DEVIALET, MARSHALL, SONY, MITCHELL & JOHNSTON - 2*ZBOOK'S- MERCURY BD ROM, ROON, QOBUZ, TIDAL, PLEX, CYBERLINK, JRIVER - MULTI HDD'S -

    Oh my god! There's nothing wrong with the bidet is there?

    “Nothing discloses real character like the use of power. It is easy for the weak to be gentle. Most people can bear adversity. But if you wish to know what a man really is, give him power. This is the supreme test. It is the glory of Lincoln that, having almost absolute power, he never abused it, except on the side of mercy".

    “You see these dictators on their pedestals, surrounded by the bayonets of their soldiers and the truncheons of their police ... yet in their hearts there is unspoken fear. They are afraid of words and thoughts: words spoken abroad, thoughts stirring at home -- all the more powerful because forbidden -- terrify them. A little mouse of thought appears in the room, and even the mightiest potentates are thrown into panic.”

    "You don't have free will. You have the appearance of free will.”

    “There's a war out there, old friend. A world war. And it's not about who's got the most bullets. It's about who controls the information. What we see and hear, how we work, what we think... it's all about the information!”


    ***SMILE, BE HAPPY***

  7. #7
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 4,737
    I'm jamie.

    Default

    this one looks like it will do, (I HOPE)

    http://www.mouser.co.uk/Search/Produ...B241E425K504A2
    My System
    John Wood KT88 Amp.
    Paradise Phono Stage
    Sony TTS-8000 Turntable.
    PMAT-1010 MK6 Tonearm.
    Ortofon Cadenza Bronze
    Sony X555ES Cd Player
    Yamaha NS1000m Speakers

  8. #8
    Join Date: Jan 2013

    Location: Carlisle - UK

    Posts: 1,984
    I'm Ken.

    Default

    Quote Originally Posted by jamie123 View Post
    this one looks like it will do, (I HOPE)

    http://www.mouser.co.uk/Search/Produ...B241E425K504A2
    That's a 500Kohm pot you link to Jamie, I would measure the one you have to make sure its not just 500ohm. Its a speed control not a volume pot in function and there is also the question of linear or logarithmic curve, which may or may not effect the ease of adjustment/speed matching.

  9. #9
    Join Date: Jan 2017

    Location: Kansas City, Missouri

    Posts: 590
    I'm Nathan.

    Default

    All of the Pioneer tables I've seen either use 10k or 20k pots. The European models must be different. I've always replaced them with spares from other tables.

    I'm not sure if they are linear or logarithmic, and don't know that it would even matter which type you used.

    I'd say measure the one you have and get both types. You can always use them for something else later.

    Sent from my Z981 using Tapatalk

  10. #10
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 4,737
    I'm jamie.

    Default

    its a japanese model nathan,the problem has been traced,it appears to be one of the hall motor pick ups wasn't working,i collect the tt next week
    My System
    John Wood KT88 Amp.
    Paradise Phono Stage
    Sony TTS-8000 Turntable.
    PMAT-1010 MK6 Tonearm.
    Ortofon Cadenza Bronze
    Sony X555ES Cd Player
    Yamaha NS1000m Speakers

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