Behaving like undervoltage?

I went into my studio last night to find a dim overhead light and my 4
RNC's buzzing like a vibrating cellphone in a pile of bottlecaps. Not
through the speakers, but the units themselves. I unplug each of them
and the sound stops. Then I notice that many of the peak lights are on
on the board. The record light has come on on the tape deck (it usually
doesn't light unless the transport is engaged). There is a hum through
the monitors and the only other piece of gear that's powered up (an
Orban 642) is peaking on one channel and peaking about once a second on
the other channel. I unlugged the main power to the equipment and
checked the voltage at the wall - 80v. I'm glad everything else was
off. Does this behavior seem like anything that could be caused by the
undervoltage itself? Or is I more likely that there was some sort of
surge that caused damage before the voltage dropped? Why would the peak
lights be coming on? And what could make an RNC buzz like that? Any
insight would be much appreciated.
Thanks, Andy

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Relevant Pages

  • Re: OT: Digital Switch Over Today
    ... gently rising from the lowest channel and peaking at the highest or - more likely - one or two channels below the highest. ... well over the edge of the escarpment. ... The formula for calculating UHF channel frequencies in the UK is 8N + 303.25 where N is the channel number. ...
    (uk.radio.amateur)
  • Re: OT: Digital Switch Over Today
    ... gently rising from the lowest channel and peaking at the highest or - more likely - one or two channels below the highest. ... well over the edge of the escarpment. ... The formula for calculating UHF channel frequencies in the UK is 8N + 303.25 where N is the channel number. ...
    (uk.radio.amateur)