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    1-2 second buzz when applying power to cold st-70

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    detoxer

    Posts : 10
    Join date : 2011-08-17

    1-2 second buzz when applying power to cold st-70

    Post by detoxer on Fri Aug 26, 2011 8:06 pm

    This is a brand new vta st-70 that functions beautifully except when power is applied when cold,I get a 1-2 second buzz, I think from the power supply? Any suggestions?

    Westy56

    Posts : 58
    Join date : 2011-05-09
    Location : Albuquerque

    Re: 1-2 second buzz when applying power to cold st-70

    Post by Westy56 on Sat Aug 27, 2011 11:23 am

    detoxer wrote:This is a brand new vta st-70 that functions beautifully except when power is applied

    Sounds like you should leave it unplugged. Laughing Just kidding.
    Where is the buzz coming from?



    Steve

    Sal

    Posts : 223
    Join date : 2009-02-05
    Location : Central New Jersey Dynaco-ST70.com

    Re: 1-2 second buzz when applying power to cold st-70

    Post by Sal on Sat Aug 27, 2011 11:33 am

    Probably just the initial magnetic field surge happening to the power transformer, did you install isolating rubber washers under the power transformer screws that might eliminate the vibration?

    Sal

    detoxer

    Posts : 10
    Join date : 2011-08-17

    Re: 1-2 second buzz when applying power to cold st-70

    Post by detoxer on Sat Aug 27, 2011 12:24 pm

    Yes there are isolaters installed, It is definitely the initial power surge that causes the buzz but I didn't have this problem the first 10 or 15 times I turned on the amp. Is this normal?

    detoxer

    Posts : 10
    Join date : 2011-08-17

    Re: 1-2 second buzz when applying power to cold st-70

    Post by detoxer on Sat Aug 27, 2011 5:00 pm

    Thanks for responding Sal, I have determined what the problem was, seems the power strip I was using could not handle the wattage of the amp. Plugged the amp in on a dedicated outlet and she works flawless,went ahead and trashed the strip. Thanks again for your input.

    Captain Coconut

    Posts : 209
    Join date : 2009-10-13
    Age : 64
    Location : Great White North

    Re: 1-2 second buzz when applying power to cold st-70

    Post by Captain Coconut on Sat Aug 27, 2011 7:43 pm

    detoxer wrote:This is a brand new vta st-70 that functions beautifully except when power is applied when cold,I get a 1-2 second buzz, I think from the power supply? Any suggestions?

    If you're only getting a buzz for 1-2 seconds, you may want to try smoking something else! Rolling Eyes

    DynakitParts
    Admin

    Posts : 181
    Join date : 2008-11-30

    Getting a Buzz

    Post by DynakitParts on Sat Aug 27, 2011 10:30 pm


    Captain,
    I like your sense of humor...

    Kevin

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