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heating blanket noise
Posted: Mon Jun 18, 2012 5:24 pm
by segovia
Hi
John - I think this is one for you, do your heating blankets buzz when the power is applied ?
John
Re: heating blanket noise
Posted: Mon Jun 18, 2012 5:26 pm
by deadedith
I downloaded Doc Watson's Deep River Blues into the blanket to cover up the buzz.
Just kidding - my overhead lights will buzz sometimes - could that be it?
Re: heating blanket noise
Posted: Mon Jun 18, 2012 5:29 pm
by tippie53
Somtimes they do produce a 60 cycle hum I don't know why but they do.
Re: heating blanket noise
Posted: Mon Jun 18, 2012 5:34 pm
by segovia
Thanks, never heard it before now
The blanket hasn't been used for about 18 months, just getting back into making stuff
John
Re: heating blanket noise
Posted: Wed Jun 20, 2012 5:57 am
by hummingbird
Hi John
I get the buzzing also. However, it only occurs when I'm using the controller to control the current. If I switch it to full power with no resistance it does not buzz. It's possible that the buzzing is coming from the controller itself.
Re: heating blanket noise
Posted: Wed Jun 20, 2012 6:30 am
by tippie53
the controller may be part of the cause . I use a VSI switch and I do have a blanket that buzzes on Var but it works. I will see what the supplier has to say.
Re: heating blanket noise
Posted: Wed Jun 20, 2012 9:18 am
by Darryl Young
Maybe the noise is turning the blanket on/off while in variable mode to control the blanket temp. See if the frequency of the "buzz" drops when you turn the dial to a lower temp and if it increases when you turn it to a higher temp. If the frequency stays constant, then the noise may not be related to the on/off control. Just a thought.