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    SP-14 Voltage Regulator



    Posts : 33
    Join date : 2013-06-19

    SP-14 Voltage Regulator

    Post by mijohn on Tue Mar 04, 2014 10:21 am

    Whilst inspecting my handy work very closely after completing my SP-14 build I noticed that the heatsink that the LD1084V voltage regulator is attached to on the left channel is in contact with a track on the PCB topside. This track connects with the adjust leg of the regulator. The input leg of the regulator is connected to the heatsink via its metal tab. This would not be a problem unless the heatsink has a chip or scratch in the coating exposing bare metal on the base in contact with the PCB track. This would cause a short! To be on the safe side I inserted a piece of insulation between heatsink and board before firing the amplifier up. Filing  the overlapping bit of heatsink off would be another option.  
    Roy and others may already be aware of this and I have got it wrong and there is no issue, so please put me right if I have.

    My SP-14 sounds very good by the way!


    Last edited by mijohn on Tue Mar 04, 2014 8:38 pm; edited 1 time in total

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    Join date : 2008-11-30

    Re: SP-14 Voltage Regulator

    Post by tubes4hifi on Tue Mar 04, 2014 12:16 pm

    thanks for pointing that out !

    Posts : 133
    Join date : 2009-01-20
    Age : 70

    Re: SP-14 Voltage Regulator

    Post by pmarcin on Tue Mar 04, 2014 2:46 pm

    Good catch.

    Posts : 1467
    Join date : 2013-04-01
    Location : Michigan USA

    Re: SP-14 Voltage Regulator

    Post by sKiZo on Tue Mar 04, 2014 3:00 pm

    For new builds, maybe add some of them cute lil stick on felt feet you can get at the hardware store. Handy to have around - I used those to keep my KT120's from rocking, as the bases do overlap the socket mounting screws ...


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    Join date : 2011-04-10
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    Re: SP-14 Voltage Regulator

    Post by pigface on Tue Mar 04, 2014 10:11 pm

    I had similar problems with mine .  I made a insolator  from a small  piece of circut board.    Or you could just grind that area of the heat sink away .

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    Re: SP-14 Voltage Regulator

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