12v switching regulator singing

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12v switching regulator singing

Postby f6bir » Tue Oct 19, 2010 3:16 am

Hello all,
Since time one of my switching 12v regulator or associate choke singes depending if I put the RF power or not
I don't watch anything on the scope and all is working well
Is anyone now why
73'

Rene F6BIR
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f6bir
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Re: 12v switching regulator singing

Postby kf1z » Tue Oct 19, 2010 6:38 am

Do you mean you HEAR the regulator making noise? A mechanical singing...?

Or do you see something on a scope?


I think if all is working well, maybe some glue in the appropriate place........
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kf1z
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Re: 12v switching regulator singing

Postby f6bir » Tue Oct 19, 2010 7:27 am

Yes I hear song from regulator or 150µH choke like a water escape ! but only sometime and sound level is variable
nothing I saw on the scope
Thanks
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