On Tue, 22 Dec 1998, Mark A Moss wrote:

> I beleive spark gap telegraphy was banned internationally around 1938.
> If you aren't using it to communicate though...

If it was not then, then the current FCC RFI rules buried it, but oil
furnaces use it all the time...

BTW, am I the only one to notice that the *first* demonstrations of radio
wireless communication used a spark gap transmitter AND receiver, worked
somewhere in VHF (probably around our FM bands of today, or higher,
judging from the dipole sizes), and used NO semiconductors, let alone
valves ? (H. Hertz). That much for advanced technology.

Peter