Re: [TCML] Q

["Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>]

Ed Phillips wrote:
> Antonio:
>
>    As I recall you run low power coils only.  Do you have any 
> experience with tuning a coil your way and then running it with a 
> spark-excited primary circuit and with enough power to get 50 cm 
> streamers or more?  I would think that with the streamer loading the 
> tuning would be much broader and that the secondary resonant frequency 
> would be somewhat reduced.
My experimental coils reach 30 cm streamers. Some reduction in the 
secondary resonance frequency is expected due to streamer loading. Just 
a question of putting a hand close to the secondary terminal and tuning 
for perfect energy transfer in this condition. Or attach a wire with the 
approximate shape of a streamer to the terminal while tuning. There is 
really some broadening in the tuning in a loaded system. The tuning 
don't have to be so precise when streamers and the primary gap are there 
draining energy. The effect can be simulated by adding a resistor in 
series with the driver in the tuning circuit, as resistance in the 
primary and in the secondary circuits have similar effects.

Antonio Carlos M. de Queiroz

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