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Old 13th Jan 2022, 2:35 pm   #5
agardiner
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Join Date: Sep 2020
Location: Thetford, Norfolk, UK.
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Default Re: Hum on gram. Why?

Quote:
Originally Posted by McMurdo View Post
perhaps a simple terminating resistor is all that's required between gram and earth sockets, something the bluetooth module is happy driving
Yes. If the PU input is separate from the radio, (ie switched) then try something like a 220R resistor across the socket. Kills most of the hum and the low impedance bluetooth unit will not even notice it.
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