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Re: [TCML] Ultraviolet Observations?

To save confusion please define what you mean by a "band". Are you referring to the the bands allocated by international treaty and administered by the FCC or "bands" which might be defined by other authority? 

I would imagine that work along the lines you suggest, for "radio frequencies", is available dating from the "spark and arc" days or preceding it. Resurrecting it would make an interesting project. Did Hertz write a paper on the subject? 

----- Original Message -----

It would be very useful for coilers to investigate the various frequency 
ranges at use in a Tesla coil and produce a real time visual output of 
their activity. I hope you have the perseverance to continue with this 
pursuit until you get results. 

It might help to think about the various frequency bands being used. There 
is the superlow frequency band that powers the transformer, which should be 
just as fascinating and informative as the other frequency bands. 

Then there is the ultralow frequency band that drives the resonator 
circuit. This will show us the strengths and weaknesses of the coil design. 

Then there are the various higher frequency bands of the output, depending 
on the coil construction. 

And then there are the "secondary" frequencies generated by environmental 
interactions, such as the production of light from gas molecules 
surrounding the coil. Of course, by "secondary," I am not referring to the 
"secondary coil" but to the effects of the whole resonator on the 

Because of the wide range of frequencies and their varying natures, it will 
be necessary to have several sets of tuned sensors focusing on each band of 

In my experiments, which at one time were performed in a special room lined 
with aluminum coated space blankets, I noticed the various coil 
configurations behaved significantly different than when there was no 
reflective container. One of my combination flat spiral and tall solenoid 
coils produced stable ion jets at the top load, rather than typical 

In nearly all cases, the E fields of my coils were much stronger than when 
performed outside of the reflective container. 

As for detecting x-rays, I imagine a dosimeter would help. I never did use 
a dosimeter while operating my coils, but I wish I had. There came a time 
when I felt the effects of radiation poisoning and simply shut down my 
coils for several years while I regained my health. And it is for this 
reason that I am very interested in your eagerness to visually map the 
radiations of the coils. I would like to see exactly what I am creating 
when I build unusual coil configurations in unusual environmental 
situations. I realize you are interested in more than the total energy 
output of x-rays, but I mention this as a matter of experience. 

I do know that x-ray video technology exists and is used in commerce; you 
have seen them at airports when they scan your baggage. Perhaps one of 
these machines can be repurposed for TC monitoring? 


On Mon, May 18, 2015 at 1:04 AM, illuminated <illumination00@xxxxxxxxx> 

> Well first off, I think that it will be interesting to see what 
> specifically is produced within this range. I am curious as to whether or 
> not x-rays will be produced, but I (at this moment) cannot acquire 
> equipment sensitive enough to capture x-rays (to my knowledge). Presently 
> I thought that I would start within the visible light + 250-400nm and IR 
> portion of the spectrum and then see what comes of it. I figured that it 
> may be interesting to see if anyone else has seen results from this. 
> For example, there was a particular video that recently caught my eye that 
> a friend shared with me from NASA. It is the "Tether Incident" from 1996. 
> What intrigued me was the additional "objects" that were seen within the UV 
> portion of the spectrum. Granted, I don't know how to interpret the very 
> interesting results from that video, but what really got me thinking was 
> that it does appear that some higher energy "objects" may have been 
> captured in the UV portion of the spectrum. With that I got to thinking 
> that it could potentially shed some light on establishing additional 
> meaningful feedback for my own experiments and perhaps expand my level of 
> understanding both in the way of what is going on and patterns of energy, 
> etc. 
> To this end, I was thinking that a UV pass only filter could be useful on 
> this camera. BUT, I suppose too that I could get very interesting results 
> simply by working in a low to no light room that would facilitate perhaps 
> even more clarity of what would be going on. 
> Thanks for getting me thinking. Your question as to "why" made me think 
> that perhaps indeed I can manually limit lighting to actually accomplish my 
> goal without actually utilizing a UV pass filter. 
> -G 
> On Sun, May 17, 2015 at 6:50 PM, David Thomson < 
> tcbuilder@xxxxxxxxxxxxxxxxxxxxxxxx> wrote: 
> > Why would you want to be limited to ultraviolet? If you are aiming to 
> > measure the output radiation at the breakout of a high voltage system, 
> > which can produce x-rays if sufficiently powered and designed, then you 
> > will still be missing the active frequency of the output. Of course, if 
> you 
> > were interested in the secondary ionization of the surrounding 
> atmosphere, 
> > ultraviolet could be useful. To maximize the ionization, however, means 
> > having top load capacity in excess of the potential so that no streamers 
> > are produced. I suspect in the case of ionized atmosphere there would be 
> a 
> > visual blob roughly equivalent to the shape of the E field. 
> > 
> > Dave Thomson 
> > 
> > On Sun, May 17, 2015 at 3:05 PM, illuminated <illumination00@xxxxxxxxx> 
> > wrote: 
> > 
> > > In a similar vein to my other message, but more specific, has anyone 
> ever 
> > > used a UV filter to view / record high energy experiments? (400 nm to 
> > 250 
> > > nm to be specific) 
> > > 
> > > I am working on putting together a full spectrum camera for such 
> > > observations and am curious as to whether others have taken this 
> approach 
> > > before to see what additional non visible light spectrum observations 
> may 
> > > have been made. 
> > > 
> > > 
> > > -G 
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