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- Path: sparky!uunet!mcsun!uknet!gdt!bsmail!smee
- From: smee@bristol.ac.uk (Paul Smee)
- Newsgroups: rec.audio
- Subject: Mysterious hum
- Message-ID: <1992Sep11.161022.8290@bristol.ac.uk>
- Date: 11 Sep 92 16:10:22 GMT
- Reply-To: P.Smee@bristol.ac.uk (Paul Smee)
- Organization: University of Bristol
- Lines: 29
-
- OK, since we seem to be discussing hums today, I've got a mysterious one,
- anyone got any ideas? Description:
-
- Power supply hum in my amp. (Probably power supply, since it doesn't
- come through the speakers.) Very low level, so it doesn't bother me. I
- can hear it while I'm over at the stack changing a record or CD, but
- not once I've moved a few feet away. (That's why it hasn't bothered me
- much.)
-
- The mysterious bit is that it only happens after about 10 at night.
- (No, I don't know what time in the morning it stops, but by the time i
- get up it's gone. Latest I can speak for is 2AM, when it still hums.)
- Nothing to do with how long it's been on. If we've gone out for the
- day, get back after 10, and I turn the thing on, it starts humming
- instantly. If it's an at-home day, and I turn things on when I get up,
- it all stays dead quiet until 10 PM, when it starts to gently hum.
-
- We don't have anything in the house on a timed circuit which cuts in or
- out at that time. It's not synchronised with the streetlight, or when
- we decide to turn on the livingroom lamps, or anything else obvious.
- Ghosts? Should I be suing my power company? :-)
-
- (Don't waste lots of time thinking about this, since it's not loud
- enough to be a problem. Just makes me curious, if you've got any top
- of the head ideas...)
-
- --
- Paul Smee, Computing Service, University of Bristol, Bristol BS8 1UD, UK
- P.Smee@bristol.ac.uk - ..!uunet!uknet!bsmail!p.smee - Tel +44 272 303132
-