snip > >I've had similar experience. How do you quench your gap? Also, I've driven my 12/60 neons at 140 v without ill effects. Yet. > >Suggestions from others? > >RWW my gaps are 14 copper tubes (12 gaps) no forced air...gonna do some new ones, cause the tubes are mounted in a pvc pipe (sewer drain) and when they heat up the plastic shrinks the gaps together. Prolly try forced air thru the assembly to cool and quench. kenC