I want to produce a 100 volt peak to peak symmetrical AC waveform to light a miniature neon bulb. It strikes at about 90 volts then settles ("clamps") at about 50 volts, according to the spec. I want the frequency to be at least 10 kHz for easy filtering because the circuit will also be passing speech up to about 8 kHz. 20 kHz would be ideal but I don't even know whether a neon will work at such a "high" frequency. Maybe there's a sensible limit to how quickly a gas will ionise? I suspect that I'll have to wind a ferrite transformer and drive it with a square-wave generator. (I have some ferrite rings.) I'd like to keep it simple but use discrete components (not ICs because it takes ages for orders to reach me here). Basically a "junk box" design. However, I have some NE555s somewhere. It's after midnight here so I'm off to bed. Sensible suggestions for the design are welcomed but I won't respond for a few hours. Thanks in advance.