Graham Gunderson's Energy conference presentation Most impressive and mysterious

[TinselKoala]

Nah, You, RF generator, solid state. Hertz, RF generator spark gap. You, near field, Hertz, near field.  It's just a nice well engineered modern day demonstration,
using all the solid state goodies of Hertz device with application of later near field theory and resonance.  This is not new!
Besides not working under water(tested by dunking both units as shown in salt water, no orientation of receiver, output smoke, hydrogen and oxygen) I bet it works in space,
glows when held in your hand and will not electrocute you. PLUS it could charge your cell phone and toothbrush.
TK, your better than this, quit mucking with the less informed.  Sorry gang, I'm way off topic and I apologize. 
After the last few days of reading post, I need a bit of levity!  Back to Gunderson.

Ben K4ZEP

Yes, it could charge cellphones and toothbrushes, what's Hertzian about that? Did I miss his YT demonstration of charging a toothbrush using a spark gap transmitter? Link, please.
Yes, the receiver works under water (demonstrated in YT video). Yes, if I bothered to waterproof certain components on the power input side the transmitter would work under salt water.  Yes, if salt water is used it can electrolyze it and produce flammable gas (demonstrated in YT video.) Yes, it is orientation-sensitive (another clue to its non-Hertzian character). Yes, it still works, glows when held in my hand, or even when put around my head (demonstrated in still photos and YT video). No, it will not electrocute you unless you use it to charge up a capacitor to high voltage (demonstrated in YT video). Yes, although I have not tested it "in space" it works in vacuum on Earth. It operates at RF frequencies but works by electromagnetic inductive coupling, like a transformer system in the near field, not like a radio system in the far field.
No, it's not new, and no, it's not Hertzian. The solid state system does not emulate a spark gap, it creates a balanced pure sine wave with very little harmonic content (demonstrated in YT videos).

So, whatever, dude, laugh all you like, I'm glad I amuse you. After all, I do all of this for my own amusement. Back to Gunderson.

[TinselKoala]

For those of you wanting to focus on the H-Bridge here is a quick close up of the gate driver circuits.

That image doesn't really help very much. I certainly can't tell what's going on there except that there are a lot of ferrite beads in use. Good luck "reverse engineering" from that picture!


For comparison purposes, here's an H-bridge system from my own work. This uses a TL494 for the basic clock signal, which is then used to drive a BJT H-bridge current amplifier, which in turn drives two trifilar toroidal gate drive transformers, which drive the gates of the main high-power mosfet H-bridge.  The main H-bridge can be used in either full-bridge or half-bridge mode, selected by the small toggle switch at lower right.

[TinselKoala]

Evening Spokane1,

Looks to me like a 7805 regulator boot straped with another transistor for further current capability, hence heatsink.  See:https://www.google.com/search?q=7805+regulator+with+bootstrap+higher+current+transistor&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjV-v_muI_OAhUFJx4KHZIlApEQ_AUICCgB&biw=1280&bih=656
and select images and a whole possie of schematics there.  It could be a voltage regulator or a constant current source, probably a voltage regulator.
Choose the circuit that matches what you got.  Is it possible the +12VDC feed for it is coming from the output board?

Ben
K4ZEP

It sort of makes sense to me. If the non-heatsinked thing is a 7805, its output is not connected to the heatsinked-thing, so I doubt if it is a constant-current source or current booster. The heatsinked thing might be another VR to step down a higher voltage for the input to the 7805, if the rail that I have marked "12V" is in fact a higher voltage. My annotations on the photo indicate  my guesses as to what I've been able to figure out.
Could the heatsinked thing be the regulator and the non-heatsinked thing be the current-boosting transistor? But even that doesn't really make sense because only the pin3 of the non-heatsinked thing is connected to the output rail. One would expect both the regulator output and the PNP transistor collector to be connected to the output.

[TinselKoala]

Oh, I forgot to annotate the signal path. The BNC on the right looks like a signal input for the 74ac14 hex inverter. It looks like the signal is going through 2 gates on one side and 3 gates on the other side, so the two brown wires coming from the 74ac14 are carrying cleaned up and squared-off in-phase and out-of-phase versions of the input signal. Where they go? I dunno, maybe to the H-bridge gate drivers. The other BNC at the top.... I dunno.

[k4zep]

That image doesn't really help very much. I certainly can't tell what's going on there except that there are a lot of ferrite beads in use. Good luck "reverse engineering" from that picture!


For comparison purposes, here's an H-bridge system from my own work. This uses a TL494 for the basic clock signal, which is then used to drive a BJT H-bridge current amplifier, which in turn drives two trifilar toroidal gate drive transformers, which drive the gates of the main high-power mosfet H-bridge.  The main H-bridge can be used in either full-bridge or half-bridge mode, selected by the small toggle switch at lower right.

Hi TK,
After all the "Hurrumph Hurumph I gave you on the other device, this looks like some pretty good work there.  Excellent.  I apologize for getting a little bit flippant at time.  Your one of the good ones out there!

Ben K4ZEP