In message <F5B74858AAFC4C929D1E6F81869E1EA0@ComputerNo11>, dated Fri, 6 Sep 2013, Doug Powell <[email protected]> writes:

 
Best to simply use a glass or ceramic spark gaps which are inorganic and cannot produce carbon when arced

You are right: using PCB tracks is to invite tracking! A slot in the board with electrodes on both sides is better. These were used on CRT base PCBs for many years with no significant problems.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
If dictionaries were correct, we would only need one, because they would all
give the same information.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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