GBluer(Slayer) Exiter

[flathunter]

@flathunter,

I have to keep the power down because of where I live. I can't
risk blowing up my neighbors flat screen TVs etc. :-)
I know the effect you are talking about and I have seen your videos.
The oscillator you made is a very nice and a smart circuit.
The resonant frequency is set by the coil going to
the base of the transistor and the circuit seems to run very well
without further tuning. It also have few parts and is easy to build.

Groundloop.

Hi GLoop!

Im glad there are people here on OU like yourself who r interested in these oscillators - they are great fun, and seem to be able to provide a remarkable amount of light on very little power - sure, no doubt the thing needs tinkering with, but thats where we come in right? 

Thanks for the simple explanation - im no expert with physics, but id like to try to understand some of the theory behind the oscillator.  The transistor acts as a switch right?  I was surprised i didnt have to tune mine when i set it up....is this because of what you're saying with the coil going to the base???  Can you go a little further with his idea??  teach me??  I wanna know more!

Ive noticed these filaments act differently by my oscillator - most of the new ones i bought turn into instant plasma balls (with minimal white light also).  Ive got 3 which dont act so poor.  1 spot lamp which is really bright but has a life expectancy of about 2 mins  (last 2 in video - identical).  1 40 W filament (osram, small) (first on video) which seems to work the best as it last longer - 2 parts burn with bright white light, and 2 remain calm but have a plasma colour.

The last one which is different is a 75W.....last one on my old video rom previous post.

[Groundloop]

@flathunter,

This is the first time I have seen and built this type of oscillator. And I can't say
that I'm an expert on radio frequency and Tesla "effect" oscillators. But I did build
another small setup to test my theory about the base drive coil. So I did wind a
small iron powder toroid with a collector coil of two turns and a base coil of 60
turns (circuit drawing and image of oscillator attached). The oscillator did run.
It could not be driven by a high input voltage but did run well on 2,5 Volt. When
the oscillator had started then I could turn down the input voltage to 0,6 volt
and the ampere draw was only 0,01 ampere. It stopped to oscillate when the
voltage was turned up to approximately 6 volt due to over powering the transistor
with DC bias via the bias resistor. The "Tesla" effect you are seeing is probably
because you are running the base coil open ended and every time the transistor
switch off (no current going via the base emitter) then the coil become open ended
in both ends and the voltage is free to swing to maximum high voltage level. The
frequency of the oscillator is set by the base coil (as I see it) because the transistor
base will be switched on and off by this coil. Every coil has a capacitor part (because
the windings is close together) and a coil part. This makes the coil a tank circuit (L/C).
The frequency is f = 1/2*PI*SQRT(L*C) where L is in Henry's and C is in Farads.
I have also attached a circuit drawing of a small oscillator if people want to do
experiments with small power.

Groundloop.

[stprue]

Fantastic work GL and I would say they are much more then fun but fun none-the-less   

This particular circuit needs much more research but only a few people are looking into it.....very unfortunate!

Anyways I'm glad you're interests have been peaked.

If you want I can re-post my basic circuit of the SEC for the 10th time so more people can test easily!  (I have done this in the  past with no enthusiasm)......

let me know   

[woopy]

At all
tanks to revive  this thread here

Thanks Groundloop for your circuit and to have interest in this oscillator. i will give it a try anyway and as soon as possible.

But GL please take the time to wind a big coil (as per Gbluer (Slayer 007)  info ) because i am sure that you will be of atmost help to all of us .

Here my basic circuit (pix 1 ) and now Flathunder  and i  (and other on a other forum ) are working also with mosfet with  interesting result but i think we don't really (or at all) understand what is going on there.

And i am sure that very great improvement wil take place very soon. And probably with you,

Always ready to test every thing in my possibility

and good luck at all

Laurent

[woopy]

ooups

i fergot the pix 1

here it is