Tesla List wrote: > Original Poster: spam_proof-at-worldnet.att-dot-net > Any assistance in building quiet (audio) but simple spark gaps would be > appreciated. Thanks in advance. > - A. Banerjee Your best bet is a filtered DC powered vac-toob coil. No spark gap, and the output isn't disruptive--and therefore isn't as loud. See the recent post on the solid-state (mosfet?) coil, and the different operating modes. Good luck! --Mike