Dr Ronald Stiffler SEC technology

[Slider2732]

TK - If the outer was 25+25 turns and the inner was 25+25 turns, would that give a 50-100 turn range of the pivot ?


Here was a surprise....
I went back to the original 2 pin crystal circuit, with the Lidmotor 1000uH axial inductor.
The idea was to try the crystal radio wiper idea, with a florists wire (steel) coil that seemed to resonate at a very low 2.4MHz.
However, before doing that, I wondered if the lower value crystals might see it improve performance as they went lower.
In fact, a 10.1MHz works the best.
It cleared the 12" ruler I was using for pickup distance AND it runs a neon at 9V very well.

Somebody's going to get plasma out of these things at some point 

Update: 16" with a PC heatsink on the receiver coil

[erfandl]

:DAll ---I did a video explaining this crystal circuit exciter build better and specifically how I am making that air core coil.  I just wrap stiff paper on a AA battery, wrap the length of the battery with 26ga magnet wire, take the battery out,  and that is it.  I don't count the turns or measure the inductance.  A ferrite rod moved in and out does the fine tuning.  The coil is based on Dr. Stiffler's SEC 18 'L3' but is longer. 
  I soldered up a replication of the initial bread board version taking care to put the components on the board in about the same location.  It worked fine but the device is sensitive capacitive influence.  Tuning is a bit touchy. 
   I show the second unit driving the first unit wirelessly here:
   
  https://www.youtube.com/watch?v=tJhdZNIUOiI

Cheers,
            Lidmotor

PS----Gyula I think your idea about using a 'wiper' style coil for tuning like in a simple Crystal Radio might work.  I might try that today.  As far as the 1000mh choke I did get mine to run on different values and styles so building your own should not be a problem.  The dynamic of these open ended exciters goes beyond a simple running oscillator and EVERTHING in the local area has some effect on it -- including the human sitting in front of it.  The types of components and their position in relationship to each other matter.  I was very worried that I was not going to replicate my original bread board setup because of the capacitance in the bread board itself.  I got lucky.  It is like all the things in the local are talking to one  other when the thing pops into resonance.  In the above video I could tune the whole area in and out of resonance but tuning the second unit that was driving the pulse motor.

Hi lidmotor thanks for sharing your circuit. the number of coil info in the circuit is Illegible. whats that number ?
thanks

[erfandl]

Thanks for the report.  It looks like your crystal oscillator works and it works better with the choke coil than with the 1 kOhm resistor in the collector which is okay.  Now just use the choke coil and you can focus on making the air coil resonant at 13.56 MHz.
Member Lidmotor's above video shows a coil construction to approach resonance at 13.56 MHz when the coil is loaded and tuned with a ferrite rod.   Notice that with ferrite tuning you reduce the air core coil resonance frequency (it is like you would increase the number of turns),
Gyula

thanks. today I build the coil from lidmotor video. I buying a new 13.56 mhz crystal but yet the circuit cannot be working the ferite rod nothing doing when insert it in coil.

[gyulasun]

Hi Erfandl,

Would like to ask what is your indicator for seeing whether the oscillator works or not, with this new coil?

Do you have an AV diode plug connected to the free end of the air coil and the diodes feed a LED?
You can use such "sniffer" AV plug holding in your hand like Slider shows in his above picture. It should indicate also at the collector in itself if you touch the common diodes point of the AV plug to the collector.
Gyula

[mikrovolt]

With SEC 18 boards on the bench we recall the FFT or spec analyzer is used to see the what harmonics show and where they go.
This video shows a signal generator and how the various different species of waves spread out. Getting used to and understanding
the frequency domain is part of understanding the Doctor's work. Then we have something to compare the pattern and frequencies
of the SEC when adjusting capacitive coupling; led back planes, Stiffler loops and such.

https://youtu.be/wZoGWvYUl7Y