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For the term "donald l smith european patent".

Don Smith Device Project Part 26: Extra Inductor Added, Built-In Radiant Antenna?

made an observation while looking at Destine2012’s Dynatron design, a Russian-Smith variant which has been demonstrated as successful. and i noticed something very interesting….. and the same effect ocurs when the inductor is inside…

Don Smith Device Project Part 20a: Bell-shaped Wave-Form and Output Testing

Very pleased with the results from this new setup -Variable Freq and Pulse Width adjustable with 2 dials from 20khz to 300khz + with various cap combinations and 0-100% duty cycle -anti-parallel double ignition…