Re: Tesla Receiver Coil ..........success?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: <davep@xxxxxxxx>


>>"Like it
>>is been said before, "if it cant kill ya it aint a real radio" and
>> Tesla did invent them also.
>>Rich , kd0zz , from the middle of Missouri"

>>    Sorry, but he didn't.  His gas-filled bulbs were for lighting
>> purposes and no amplification was involved.  Follow the
>> Edison-Fleming-DeForest trail.

> Hmm. is amplification necessary?
   Depends on the objective, breadth of use desired.

> J.C. Bose transmitted radio waves at 60 GHz in the late 19th century  in
> Calcutta. He also identified them as being like light, in that  they
> were polarizable, could refract, etc. all of which were
> predicted by Maxwell.
   Yep.
   Now using those techniques, and no 'amplification',
   try listening to Radio New Zealand, direct, in
   Eastern Mass., USA.

   Bose, et al, did pioneering work.  Later iproved on.
   best
    dwp

>    Spark gap transmitter (using a cavity resonator) and a point
> contact detector.
>
> google for "bose calcutta millimeter" for lots of useful info.
>
> "
> In 1895 Bose gave his first public demonstration of electromagnetic
> waves, using them to ring a bell remotely and to explode some
> gunpowder. In 1896 the Daily Chronicle of England reported: "The
> inventor (J.C. Bose) has transmitted signals to a distance of nearly  a
> mile and herein lies the first and obvious and exceedingly valuable
> application of this new theoretical marvel." Popov in Russia was
> doing similar experiments, but had written in December 1895 that he  was
> still entertaining the hope of remote signalling with radio
> waves. The first successful wireless signalling experiment by Marconi
> on Salisbury Plain in England was not until May 1897. The 1895 public
> demonstration by Bose in Calcutta predates all these experiments.
> Invited by Lord Rayleigh, in 1897 Bose reported on his microwave
> (millimeter-wave) experiments to the Royal Institution and other
> societies in England [8]. The wavelengths he used ranged from 2.5 cm to
> 5 mm. "
>
> Bose was interested in scientific inquiry. Marconi was interested in
> commercializing.