MC275 Hum Conundrum
I replaced most of the caps in my MC275. Power up test revealed a loud hum. Making sure of my wiring I chanced to approach capacitors C1 and C12 with a pair of needle nose pliers - the hum got substantially louder perhaps 6 - 9 db or so. An aluminum framed magnifying glass also increased the hum. A plastic pen did not.
What do you think?
Thanks in advance and Happy Fourth.
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