> Man, I don't know, Dave. How long have they been selling those carbon > balls > for that purpose?
I've never seen a carbon ball in a lightning gap application. I'd have to see a few after being in action a long time before trusting them. Broadcast stations use hard metallic balls, as do electrical substations and other applications where the peak voltage is near gap voltage. Polished round gaps have more consistent breakdown. If there is a great deal of headroom between operating and breakover threshold, a pointed gap works OK. _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
