Thermionic Overunity Generator my gift to the world.

[sparks]

  If the grid is pulsed positive then your anode load filament  current  is for free.    Electric fields do accelerate electrically charged particles.  A constant voltage on the grid to cathode is problematic.  Instead of a dc high voltage supply you could use a pulsed tank circuit which uses the capacitance of the tube in parallel with an inductance.  The magnetic field produced by the inductance element could be used to bend the electron path to miss the grid completely.  A coating of flurescent material on the inside of the tube could show how many secondary electrons from the anode you were getting by producing light.   Back in the day they used a tube like this to test capacitors.  The capacitor under test would alter the rlc parameters of the grid tank.  When you hit resonance the tube would turn green.  They also used them in old radio sets as a tuning aid.  Of course you will need a source of power to power your accelerator circuit.   If the grid tank is excited by rf input from somewhere you have yourself a radio.  If however your tube accelerating field is aligned with say an extremely low frequency (dc high voltage field) you could pull some energy from the air.

[profitis]

'A constant
voltage on the grid to cathode is problematic.'

Not necessarily.it may be beneficial in this case if an electron cloud is sucked out the filament and hovvered or bounced at the grid/plate in this tube.the hysteresis can leave constant positive charge on plate under just right push-pull dog-tail hurricane.if there's some ping-pong going on between grid and plate of primary or secondary electron billiards it may be advantageous.

[profitis]

I wonder if anyone has even bothered to try this yet since its interjection.would be lovely to hear from them

[sparks]

'A constant
voltage on the grid to cathode is problematic.'

Not necessarily.it may be beneficial in this case if an electron cloud is sucked out the filament and hovvered or bounced at the grid/plate in this tube.the hysteresis can leave constant positive charge on plate under just right push-pull dog-tail hurricane.if there's some ping-pong going on between grid and plate of primary or secondary electron billiards it may be advantageous.

  The electrons accelerated by the grid to cathode electric field would end up bombarding the collector.   The collector would experience braking radiation and start emitting all sorts of photons.  Most of which would be absorbed by the collector metal and it would get hot.  I believe the idea here is that the collector will become negatively charged relative to the cathode.  The cathode to grid field accelerating the free electrons emitted from the cathode which somehow get stuck in the collector.  With the grid being held positive most of the recoil electrons will get pumped through the grid circuit increasing it's current and voltage demands.  Anyway you look at this you still need to maintain. initiate, or utilize an accelerating electric field.   If the tube is somehow located in an electric field then the total energy of the electrons striking the collector would be greater than one would expect by the grid to cathode potential alone.  Tough experiment.  You also need to monitor nuclear changes in the collector metal.  You bombard a metal with fast electrons now and again a nucleus is going to get messed with.  I always wondered if you accelerated an electron to the point that it creates a heavy electron it could become an antiproton.   Same mass but of opposite charge.   If the antiproton collides with a normal proton the charge disappears and you get two neutrons.  or a proton neutron electron thing like deuterium or a complete conversion of mass to energy/anniahalation.   Probably why we don't see alot of natural antimatter around the big bang just couldn't get them there electrons up to speed without running into something to change the acceleration into light.

[Pirate88179]

  The electrons accelerated by the grid to cathode electric field would end up bombarding the collector.   The collector would experience braking radiation and start emitting all sorts of photons.  Most of which would be absorbed by the collector metal and it would get hot.  I believe the idea here is that the collector will become negatively charged relative to the cathode.  The cathode to grid field accelerating the free electrons emitted from the cathode which somehow get stuck in the collector.  With the grid being held positive most of the recoil electrons will get pumped through the grid circuit increasing it's current and voltage demands.  Anyway you look at this you still need to maintain. initiate, or utilize an accelerating electric field.   If the tube is somehow located in an electric field then the total energy of the electrons striking the collector would be greater than one would expect by the grid to cathode potential alone.  Tough experiment.  You also need to monitor nuclear changes in the collector metal.  You bombard a metal with fast electrons now and again a nucleus is going to get messed with.  I always wondered if you accelerated an electron to the point that it creates a heavy electron it could become an antiproton.   Same mass but of opposite charge.   If the antiproton collides with a normal proton the charge disappears and you get two neutrons.  hmmmmmmmmm

Then you could target U238 (which readily absorbs neutrons) and, after a while, it will convert into another element...Plutonium.  Of course, this might be problematic with some authorities.

Bill