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    SCA-35 rebuild

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    evoroadster

    Posts : 39
    Join date : 2015-06-16
    Age : 66
    Location : Honolulu, Hawaii

    SCA-35 rebuild

    Post by evoroadster on Sat Jul 11, 2015 6:41 pm

    I am in the process of rebuilding an SCA-35 chassis that was stripped of the transformers, tubes,power cord and faceplate.  Should I use a 3 prong cord to have an earth ground or stick with the 2 prong cord?

    peterh

    Posts : 641
    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: SCA-35 rebuild

    Post by peterh on Sun Jul 12, 2015 2:54 am

    Installing an IEC well is in my opinion the optimal solution. Using a proper grounding is a good
    route to suppress hum.

    GP49

    Posts : 717
    Join date : 2009-04-30
    Location : East of the sun and west of the moon

    Re: SCA-35 rebuild

    Post by GP49 on Mon Jul 13, 2015 10:23 am

    Not to be argumentative but TOO MANY grounds creates ground loops which can cause hum. If you have two pieces of equipment, each with its own three-wire line cord with ground, and they are interconnected by shielded audio cables, you have created a ground loop, right there. Repeat this with the number of units in a typical hi-fi system and you will create lots of ground loops. If you have a tuner or A/V receiver or other unit with a cable TV hookup, you will add yet another level of ground looping between the AC line ground and the cable system ground.

    evoroadster

    Posts : 39
    Join date : 2015-06-16
    Age : 66
    Location : Honolulu, Hawaii

    Re: SCA-35 rebuild

    Post by evoroadster on Mon Jul 13, 2015 5:35 pm

    Thanks for the input so far. I will go ahead with the 2-prong cord for the rebuild.

    nmchiefsfan

    Posts : 33
    Join date : 2012-03-21

    Re: SCA-35 rebuild

    Post by nmchiefsfan on Mon Jul 13, 2015 5:48 pm

    You could install a 3 wire or IEC and if you have hum issues use a 3 prong to 2 prong adapter to eliminate the ground issue.

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