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Hi Mick,
The magnetic rectifier dates back to Tesla before the vacuum tube. Tesla had to supply DC for arc lamps when implementing AC on the grid. TESLA PATENT 413,353 METHOD OF OBTAINING DIRECT FROM ALTERNATING CURRENTS https://teslauniverse.com/nikola-tesla/patents/us-patent-413353-method-obtaining-direct-alternating-currents.
"A great way for a DC HV impulse supply is mechanically interrupted DC charged caps, hard to improve on!"
Using a transistor to switch off the current through a coil is a very common way to generate HV pulses. That way is used in auto ignition systems and in the old CRT screens. The generated flyback voltage is limited by a capacitor to an acceptable value. In the CRT screens the flyback voltage is further transformed up in one or more secondary coils and rectified into a capacitor. This is the EHT (extremely high tension) for accelerating the electron beam.
"A cap can also be considered a converter between two different types of electricity as it strips out the B field. Also converts cold electricity back to hot."
The B field is caused by the current and cannot be avoided when the charges start moving. Read transmission line theory or William .J. Hooper or Ivor Catt or Wilbert B. Smith. They all more or less state that electromagnetism is a unified field theory where the separate disciplines really can't be handled alone. Hooper tried to cancel out the different kind of fields. By canceling one kind of field in electromagnetism will only leave the other kinds intact. It all depends on the observer. When the observer moves along with a moving charge the magnetic field part of the charge won't be seen. A fixed observer will see the moving charge having a magnetic field around it.
An analogy will be an observer watching a boat moving. When the observer moves alongside with the boat no waves (magnetic field analogy) will be seen. At least the waves are seen as static or frozen (electric field analogy). When the observer is fixed the waves will be seen emitted from the boat passing by.
The paper by Floyd Sweet 'Nothing is Something https://groups.yahoo.com/neo/groups/EVGRAY/attachments/1517767915' that Norman attached also issues this.
Regards
Ole
---In [email protected], <mkjekyll@...> wrote :
Great stuff Ole!
There was something called a magnetic rectifier using a vacuum tube and magnet I have heard of but not much info yet. I found that page about Tesla spark gaps also, nice job the author did.
A great way for a DC HV impulse supply is mechanically interrupted DC charged caps, hard to improve on! A cap can also be considered a converter between two different types of electricity as it strips out the B field. Also converts cold electricity back to hot.
On 7/26/2018 2:05 AM, onielsen@... mailto:onielsen@... [EVGRAY] wrote:
Hi Mick,
"Interesting I have not found patent of Teslas magnetic spark gap but the description and drawing are available in The inventions, researches and writings of Nikola Tesla by Thomas Commeford Martin. There also seemed to be magnetic vacuum rectifiers build for a short spell but have not found much more about these interesting claimed devices that the occasional mutterings"
The Poulsen arc was the kind of arc transmitters used until the invention of tubes. Here is Valdemar Poulsen's patent (US789449) which use a flame and magnetism to control the arc: https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=789449A&KC=A&FT=D&ND=1&date=19050509&DB=&locale=en_EP https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=789449A&KC=A&FT=D&ND=1&date=19050509&DB=&locale=en_EP#
Wikipedia article: https://wiki2.org/en/Arc_converter https://wiki2.org/en/Arc_converter
From the Wikipedia article:
Duddell arc (and other early types) In the first type of arc oscillator, the AC current in the condenser i0 is much smaller than the DC supply current i1, and the arc is never extinguished during an output cycle. The Duddell arc is an example of the first type, but the first type is not practical for RF transmitters.
Poulsen arc In the second type of arc oscillator, the condenser AC discharge current is large enough to extinguish the arc but not large enough to restart the arc in the opposite direction. This second type is the Poulsen arc. Quenched spark gap In the third type of arc oscillator, the arc extinguishes but may reignite when the condenser current reverses. The third case is a quenched spark gap and produces damped oscillations.
https://www.electronics-notes.com/articles/history/spark-gap-transmitters/poulsen-arc-transmitter.php https://www.electronics-notes.com/articles/history/spark-gap-transmitters/poulsen-arc-transmitter.php
http://ethw.org/Milestones:Poulsen-Arc_Radio_Transmitter,_1902 http://ethw.org/Milestones:Poulsen-Arc_Radio_Transmitter,_1902
The history of Tesla's spark gaps and arcs: https://waveguide.blog/teslas-spark-gaps-literature-review/ https://waveguide.blog/teslas-spark-gaps-literature-review/
After the spark gaps and arcs came the tube era. Tesla used tubes too according to the story from his nephew about the ride in Tesla's electric car.
Regards
Ole
---In [email protected] mailto:[email protected], <mkjekyll@...> mailto:mkjekyll@... wrote :
Norm,
Great stuff on the VTA. Always found it suspicious that after the Scientific American released the time reversed light article that all slid into obscurity. We should be using these mirrors for satellite communications and all sorts of other applications but no. Seems that maybe wireless power is in the same boat as it should have been widely applied by now with all the carbide fets designed just for this purpose, could it be that loose coupling an off the shelf wireless power device might give away the candy store...
I am very interested in the device you posted about for fire control. Unfortunately your posts are not parsable by subject matter. Do you think this application has potential for forest fires and if so what is required to build a prototype? From the brief description available it appeared to be some sort of air pump connected to a neg ion source. Do you know the size of the generator used for fuel fires you mentioned? Is just a series of 15 kv diode rectified flybacks sufficient or are more relativistic voltages employed/required? Interesting I have not found patent of Teslas magnetic spark gap but the description and drawing are available in The inventions, researches and writings of Nikola Tesla by Thomas Commeford Martin. There also seemed to be magnetic vacuum rectifiers build for a short spell but have not found much more about these interesting claimed devices that the occasional mutterings.
I know you also mentioned that some Tesla coils can produce this effect so is this a matter of timing of a rectified primary? Need to get my thyratron up and online, so many chores and so much to build.
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