Trev, The Hum readings and graph that I posted was for one day only and will need to be repeated a great many times before any conclusion can be made. As for the chart available from the National Grid it must be remembered that the voltage on the grid will be inversely proportional to the demand.
On Saturday, November 23, 2013 1:59:18 PM UTC, Trev wrote: > > Dunno, John. Your hum was on the way back up at 11 when demand was still > falling on the graph you posted, anyway... > > On Friday, 15 November 2013 12:42:55 UTC, John Dawes wrote: >> >> On November 14 I made a series of readings of the relative Hum level >> taken at my home in Bristol UK. Starting at 7 am with one hour intervals >> until midnight, details are on the chart attached. >> There was a anomaly at 8 am followed by fall in level to a minimum at 10 >> am. >> There followed a rise until noon , a small dip at 3 pm and a rise during >> the evening. >> The most interesting was the rise which took place between 10 pm and >> midnight. >> At 11.15 pm I made a copy of the chart showing the UK Electrical Demand >> for the previous hour and one can clearly see the dramatic fall in demand >> at that time. >> >> -- You received this message because you are subscribed to the Google Groups "Hum Sufferers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/hum-sufferers. For more options, visit https://groups.google.com/groups/opt_out.
