Audiophiles hifi appreciation thread old and new

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Olly398 in reply to @FatManOnAFixie

hum chasing

=earthing unless I'm mistaken?

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FatManOnAFixie in reply to @Olly398
```
hum chasing
```
=earthing unless I'm mistaken?
IME, not always. Consider....
1) Power supply ripple
2) Heater - Cathode insulation breakdown
3) Parasitic Oscillation demodulating down into audio bandwidth
4) Earth loop/s.
5) Heater supply cable routing
6) Others I can't think of right now.
7) Sonia!

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