Bonneville Power Administration has been in the news lately in the Puget
Sound area of Washington State. People have been complaining of new
continuous buzzing from their high tension transmission lines. It seems they
use to operate them at 253,000 volts, but now have increased the voltage to
500,000 volts, which causes the buzzing.

I am wondering if that kind of increase would show up as a loud noise in
the frequency bands between 2 Mhz and 4 Mhz ? It wipes out everything -
period, unless the signal is strong enough to break through. It exists also
at higher frequencies to a lesser extent.

The sound is not staticky like atmospheric noise or normal power line noise,
but more like what you would get if you sat the set on top of an operating
television set.





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