pucho812
Well-known member
going over some units that have a hum, you can measure it and it's well buried in the noise floor of the unit but we can measure it. Since it's not audible is it worth even worrying about?
How much?pucho812 said:going over some units that have a hum, you can measure it and it's well buried in the noise floor of the unit but we can measure it.
As JR says, it depends. Hum maybe there from day one, so you'll have to live with it, but it may also be a sign that something is deteriorating (lytic caps), so it may be worth investigating. Also hum may come from a newly installed adjacent piece of equipment radiating interference. That is also worth looking at.Since it's not audible is it worth even worrying about?
The plot thickens...pucho812 said:It's an off the self PSU, brand new that was being considered for some design stuff. It is external but is a brand new thing...
Is it the indication given by the measurement panel on the AP1, Or is it what you see on a 'scope (connected at the "Processed signal" output)?pucho812 said:it's 60 cycle and on the output, measured via an ap1
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