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Need help for HVHF pulse generator using function generator

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Ash Small

Thu Oct 16 2014, 07:22PM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

I think what the OP has in mind is the fact that spark gaps, for example, radiate EM radiation (usually regarded as wasteful in SGTC's, etc.).

I think he's simply interested in this 'radiated energy', and in experimenting with 'wireless power transfer'. Obviously, the higher the spark energy, and the higher the frequency, the more 'radiant energy' generated.

This is just my guess, from reading between the lines.

teravolt

Thu Oct 16 2014, 09:48PM

Registered Member #195 Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111

well how about a VTTC that makes a radiant field I don't know about far he wants to go 6 ft. dose he want to make EMP

Ash Small

Thu Oct 16 2014, 11:48PM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

teravolt wrote ...

well how about a VTTC that makes a radiant field I don't know about far he wants to go 6 ft. dose he want to make EMP

I've no idea, but EMP doesn't usually require high frequency.

Numerous types of TC will suffice to produce radiant energy. It is generally considered to be a waste of energy in SGTC's, though.

I think this thread is one of those where someone has an idea about wanting to learn more about something, but doesn't yet have the required knowledge of the subject to adequately communicate their intentions.

rororo74

Fri Oct 17 2014, 08:35PM

Registered Member #1124 Joined: Fri Nov 16 2007, 01:42PM
Location:
Posts: 17

Yes AshSmall,
I am not into EMP. It is radiant energy I am after.
I am also not interested in generating huge lightnings off a TC torroid.
No. The whole idea is to look into radiant energy.
My inspiration....
1. Methernitha/Testatika machine
2. Ed Gray motor
3. Real tesla coils

From my research up until 2009, I saw HVHF being key.
I remember Dr. P.L. has mentioned 20KHz upwards of HV DC exploding through a SG, in one of his presentations.
True or not, I do not know, but this reminds me of the Methernitha/Testatika machine and Ed Gray motor.
(As a side note: A recent find is a channel called ufopolitics who claims that for starters one should begin at low frequencies and slowly move higher until RE starts showing in a circuit. This is a side note because there are no SGs in this setup and maybe there need not be any SGs today.)

So keeping it simple, and since the title of this thread is "Need help....", and since many fellow researchers require a motive and an application, I can more specifically say that the purpose is to investigate the effects of a HVHF exploding SG on a
1. EVGray tube.
2. Permanent Magnet's magnetic field.

I think this is a good place to start.
The people involved in 1,2,3 above were using motors to achieve a 'high' frequency. We do not need motors. We have frequency generators.
If there is something to write home about regarding 1&2 above, I would like to experiment with it.
That's all. Nothing peculiar. No EMP, no wireless transfer. Just a way to go from 20KHz upwards to 1MHz sparking a HV and logging the results. Is there any power generated? Is there more than what was put in? Straight forward stuff people. Maybe a waste of time and money, but hey it's all for science and it is something interesting.

Thanks
PS Do you know anyone who has done anything like this?

dexter

Fri Oct 17 2014, 08:49PM

Registered Member #42796 Joined: Mon Jan 13 2014, 06:34PM
Location:
Posts: 195

rororo74 wrote ...

Is there any power generated? Is there more than what was put in? Straight forward stuff people. Maybe a waste of time and money, but hey it's all for science and it is something interesting.

don't want to be rude but the "science" part in all of the above is all about how much "open minded" you are

rororo74

Fri Oct 17 2014, 10:53PM

Registered Member #1124 Joined: Fri Nov 16 2007, 01:42PM
Location:
Posts: 17

Hi Dexter,
Yes, no need to be rude. Why should you be? ))
It is what intrigues me and I need some help with it. No harm in that is there?
If you think about it..., is building a TC a more constructive, useful or money making endeavour?
And yes it is scientific research however you want to look at it, because it is an investigation into unknown territory.
And really, if you know of someone who has done it before, or if you know exactly what I am going to encounter please, I am all ears.

Sigurthr

Sat Oct 18 2014, 02:22AM

Registered Member #4463 Joined: Wed Apr 18 2012, 08:08AM
Location: MI's Upper Peninsula
Posts: 597

Intended applications aside; not all TCs are about large streamers. Many of us build high power SSTCs that run CW with little to no breakout, but huge EM fields. My largest is 3.5kW. Cost and complexity scales with output power. It isn't hard or expensive to make a 500W desktop CW SSTC with almost no breakout.

rororo74

Sat Oct 18 2014, 05:29AM

Registered Member #1124 Joined: Fri Nov 16 2007, 01:42PM
Location:
Posts: 17

Sigurthr, you get my point!!!
Look at your signature - Amateur, enthusiast, experimenter.
Scientific? Of course. Science is what tries to answer our curiosity whatever that may be.

BTW thanks to @GrantX for his input on the SG and to @teravolt for suggesting the electron tube.
@teravolt- I am not familiar with the electron tube (i must research it) but do you know if the discharge is known to cause these RE effects?
Thanks to @proudmary for the PFN - i will look into it.
Thanks to @AshSmall for trying to read between the lines.
Thanks also to @dexter for pushing me in the direction of other open minded people that did science, Tesla being probably the greatest.

So what is your opinion? Do you have some recommendations?
What type of caps do you think should be used?
How can I push the SG to the highest possible frequency?
Do you have a circuit recommendation - maybe something that you are using? Thanks

Ash Small

Sat Oct 18 2014, 10:44PM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

Well, if I wanted a high frequency spark, I'd use a circuit similar to this:

Note the de-q-ing diode in a schematic further down the page.

It's basically the primary circuit from a TC, but you can determine the firing rate of the gap by varying the capacitor and inductor values.

Basically, the tank circuit charges, then 'rings down', but instead of power being transferred to a secondary circuit, all the power is 'radiated' by the spark gap, apart from losses.

It's a starting point if you don't get any other suggestions.

I think you should be able to use your NST, but this circuit will double the output voltage of the NST.

Remember, these circuits are LETHAL several times over, so read up on all the safety stuff on the Wiki.

EDIT: An alternative circuit that should also work is here:

rororo74

Sun Oct 19 2014, 01:46AM

Registered Member #1124 Joined: Fri Nov 16 2007, 01:42PM
Location:
Posts: 17

I will look into those. I remember looking into his 4MHz SSTC years ago but of course it is SS - no SG.
Thanks AshSmall

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