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ARCHIVED FORUM -- April 2007 to March 2012
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This is the first Archived Forum which was active between 17th April 2007 and 1st March February 2012

 

Latest post 02-16-2011 8:13 PM by grumpy. 2 replies.
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  • 02-14-2011 10:08 PM

    • grumpy
    • Not Ranked
    • Joined on 05-24-2010
    • Posts 2
    • Bronze Member

    Beogram 8000

    Tone arm motor drive transistors (TR1 through TR4) complimentary pair PU51 and PU01 are no longer available.  I've even tried equivalents 2SB1201, 2SD1801 to no avail.  Do anyone know a source?

  • 02-15-2011 9:07 AM In reply to

    • Dillen
    • Top 10 Contributor
    • Joined on 02-14-2007
    • Copenhagen / Denmark
    • Posts 5,008
    • Founder

    Re: Beogram 8000

    Welcome to Beoworld !

    PU01 ~ NTE188 (NPN)
    PU51 ~ NTE189 (PNP)

    But they rarely fail. Are you sure yours are bad ?
    What are the symptoms ?

    Martin

  • 02-16-2011 8:13 PM In reply to

    • grumpy
    • Not Ranked
    • Joined on 05-24-2010
    • Posts 2
    • Bronze Member

    Re: Beogram 8000

    Thanks Martin.  Don't know about Denmark but discrete transistors are extremely limited and hard get in Australia. No luck with your suggestion either. And as for the well-being of those transistors - there is no doubt about it. What happened is the collector metal tag at the top of one of them was in contact with the wire loom and burnt through the insulation over the years hence created a short. A rare occurance but - it happened.
    Cheers
    Colin

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