R.Measures wrote: > On Mar 17, 2005, at 12:47 PM, Vic Rosenthal wrote: > >> R. Measures wrote: >> >>> At the voltage normally present - c. 6kV-pk - corona seems unlikely. >> >> Absolutely not! > > I have a high-pot tester and here at 120m above sea level I do not see > corona at 6kV. Is the onset of corona (visible or not) affected by frequency? Steve