Re: Lighting incandescent lamps with TC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Allanh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <allanh-at-starband-dot-net>

Icandescent bulbs made in the last 50 years contain an
inert gas and it is this gas that will glow when exposed to high energy RF
radiation. Old bulbs were originally evacuated to prevent the filiment from
burning out but the inside of the bulb slowly darkened as a result of
tungsten being deposited on the inside of the glass. Inert gas replaced the
vacuum to make the bulbs last longer. High output bulbs today contain many
types of gas/filiment combinations. Halogen and Krypton are two examples ( I
get weak around Krypton).
Argon is a common gas used in bulbs and it will glow in the presence of RF.

allan

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, September 16, 2002 9:08 PM
Subject: Re: Lighting incandescent lamps with TC


>
> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
>
> Tesla list wrote:
> >
> > Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <davep-at-quik-dot-com>
> >
> > > All,
> >
> > > I was wondering how many of you have tried the
> > > experiment where you cause an incandescent lamp to
> > > glow from current coupled by induction, by connecting
> > > a wire loop across the contacts of the bulb.  I tried
> > > this using a flashlight bulb, wire loop and approached
> > > (as close as I dared without being tagged by
> > > streamers) my running 6" coil.  Nothing.  Not even the
> > > slightest glow from the filiment (spelling?).
> >
> >         close.
> >         filament.  8)>>
> >
>
> >         Lighting a filament (a demo Tesla used to do) I've
> >         not tried.  The physics are simple:
> >                 need to get enough current into the filament.
> >         (Tesla used to use Very heavy copper, i've heard
> >         tales of bus bars....) to demonstrate that The Freqs
> >         are Different and the behaviour is different.)
> >         Random thoughts:
> >                 Pick a LOW CURRENT lamp (measure them)
> >                 Flashlight lamps are high current FOR THE
> >                 EQUIVALENT WATTAGE.
> >                 Try a multiturn coil.
> >                 Fat Wire (current operated device).
> >                 Build a series resonant circuit AT THE COIL
> >                 freq?
> >
> > > Does anyone have any ideas as to what the problem is?
> >         Not enough current.
> >
> >         (Filaments are very nonlinear.  Might be Just
> >         Under incandescence and Not Quite There.)
> >
> >         best
> >         dwp
>
> I can't understand the problem, as it should be easy to burn out a
> filament - after all you have at least several hundred watts to play
> with!  I have an absorption wavemeter (series tuned circuit comprised of
> inductor, variable capacitor, and bulb filament) here which I built for
> measuring appropximate TC operating frequencies.  The indicator is a 60
> ma, 2 volt pilot lamp shunted with a small inductor.  I can burn out the
> bulb if I get too close to the primary of a 30 watt miniature coil I
> built a while back, and with a bigger coil I need a separation of feet.
> Interestingly enough, because of the high peak power/low duty factor
> nature of the spark signal, I can get sparking [voltage breakdown]
> between the plates of the 0.001 mfd variable capacitor (old Cardwell ca
> 1922) long before the filament goes.
>
> Ed
>
>
>
>