Re: Ion Wind Loudspeaker
These are all discussed in the threads I've mentioned at least once here. I know it's tempting to post before bothering to read the complete thread, given the number of pages it is now, but it would save things being repeated several times. Corona discharges all have the problem of making huge amounts of ozone, and even NO2, not to mention that they tend to be somewhat noisy, and the frequency response is not flat due to the discharge geometry. They tend to be driven by what are essentially audio modulated tesla coils. It's no coincidence Hill went for a DC-driven glow discharge.
Er, the voltage scale doesn't matter, as the voltage is a function of the electrode geometry and spacing, and the current (it's an I-V graph, not a V-I graph which wouldn't make sense). Your design works in the dark region of the quoted grap; using needles or other sharp points nudges it to the corona region.Indalhc said:
bear said:
These are all discussed in the threads I've mentioned at least once here. I know it's tempting to post before bothering to read the complete thread, given the number of pages it is now, but it would save things being repeated several times. Corona discharges all have the problem of making huge amounts of ozone, and even NO2, not to mention that they tend to be somewhat noisy, and the frequency response is not flat due to the discharge geometry. They tend to be driven by what are essentially audio modulated tesla coils. It's no coincidence Hill went for a DC-driven glow discharge.
42bit 96kfps Holographic Sound Project
A tesla coil should be good for this. The schematic for a tesla–coil based plasma tweeter over
at http://www.plasmatweeter.de looks maybe a bit complicated, however if this was built and the electrodes was replaced by a much broader surface lifter based material – using magnet wire and aluminum foil, thus implementing the cathode section – then this might be getting somewhere
bigwill said:
A tesla coil should be good for this. The schematic for a tesla–coil based plasma tweeter over
at http://www.plasmatweeter.de looks maybe a bit complicated, however if this was built and the electrodes was replaced by a much broader surface lifter based material – using magnet wire and aluminum foil, thus implementing the cathode section – then this might be getting somewhere
Lifter vehicle + plasma tweeter driver
The RF section of a plasma tweeter like this one from plasmatweeter.de
http://www.plasmatweeter.de/images/diy/mytweeter/Plasma_RF_new.GIF
could be driven directly by a PWM audio amplifier.
Connecting this to a 'lifter vehicle', that's the plan
The RF section of a plasma tweeter like this one from plasmatweeter.de
http://www.plasmatweeter.de/images/diy/mytweeter/Plasma_RF_new.GIF
could be driven directly by a PWM audio amplifier.
Connecting this to a 'lifter vehicle', that's the plan
42bit 96kfps Holographic Sound Project
I have temporarily skipped the grid just to get started somewhere (By the way, the grid may have the best effect if placed somewhere in depth within the higher field, the higher field could then be biased to a equilibrium and a little force on the grid would then be all that is needed to set 'the field' in motion).
Then again, what you label as the grid is probably the cathode itself And that's fine, as long as it has a comparably larger surface to the anode, which again also should have a large surface (compared to the tip of a needle that is).
Talking about a high voltage power supply, the TCL5K from http://www.amazing1.com/tesla.htm may be good for experiments. One feature is 'Noiseless Operation'.
bigwill said:
I have temporarily skipped the grid just to get started somewhere (By the way, the grid may have the best effect if placed somewhere in depth within the higher field, the higher field could then be biased to a equilibrium and a little force on the grid would then be all that is needed to set 'the field' in motion).
Then again, what you label as the grid is probably the cathode itself
And that's fine, as long as it has a comparably larger surface to the anode, which again also should have a large surface (compared to the tip of a needle that is).Talking about a high voltage power supply, the TCL5K from http://www.amazing1.com/tesla.htm may be good for experiments. One feature is 'Noiseless Operation'.
Lifter vehicle + plasma tweeter driver
Looking at the Ionovac schematic, there is only one tube in there d:
It should be good to know the voltages, so one high voltage probe
to build as well.
http://www.ionovac.com/schematic.htm
Looking at the Ionovac schematic, there is only one tube in there d:
It should be good to know the voltages, so one high voltage probe
to build as well.
http://www.ionovac.com/schematic.htm
Lifter vehicle + plasma tweeter driver
If only the RF / Tesla coil section of the Ionovac was built, merely to have a tesla coil, that
wouldn't be too difficult. If it worked fine then you could add the audio modulation. Very easy
bigwill said:The problem with all these power supplys is that they seem quite overkill... and I'm not too good at building things
If only the RF / Tesla coil section of the Ionovac was built, merely to have a tesla coil, that
wouldn't be too difficult. If it worked fine then you could add the audio modulation. Very easy
Lifter vehicle + plasma tweeter driver
This should be pulsed DC at a very high / inaudible frequency.
The plan is to use most (all) of the coil's energy for the 'lifter vehicle transducer'. So if this works, it could then be substantially more efficient than a plasma tweeter.
For a 'medium current' >20 kV output, some tweaking may be needed. I'm thinking about using a 813 valve for driving the tesla coil. There are six more components in the RF–section of the Ionovac d:
If this is sufficient for making the vehicle lift, then to add the audio modulation, in parts this consists of one transformer only
bigwill said:
This should be pulsed DC at a very high / inaudible frequency.
The plan is to use most (all) of the coil's energy for the 'lifter vehicle transducer'. So if this works, it could then be substantially more efficient than a plasma tweeter.
For a 'medium current' >20 kV output, some tweaking may be needed. I'm thinking about using a 813 valve for driving the tesla coil. There are six more components in the RF–section of the Ionovac d:
If this is sufficient for making the vehicle lift, then to add the audio modulation, in parts this consists of one transformer only
I tried to build the thing described in the attatched image, but it didn't work . It might've been because I applied the signal to the outer casing instead of to the needle like in the image, or more likely due to the fact that it was a hudge bodge and my transformer wasn't suitable
I might order some super cheap 100v line transformers to mess with.
. It might've been because I applied the signal to the outer casing instead of to the needle like in the image, or more likely due to the fact that it was a hudge bodge and my transformer wasn't suitable I might order some super cheap 100v line transformers to mess with.
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Lifter vehicle + plasma tweeter driver
That looks more like a 'plasma'/high voltage field microphone to me d:
Transformers have some difficulty reaching 20 kV, one good reason to modulate via a valve at the anode (in a tesla coil) or using a lower voltage modulated grid at the cathode.
bigwill said:I tried to build the thing described in the attatched image, but it didn't work
I might order some super cheap 100v line transformers to mess with.
That looks more like a 'plasma'/high voltage field microphone to me d:
Transformers have some difficulty reaching 20 kV, one good reason to modulate via a valve at the anode (in a tesla coil) or using a lower voltage modulated grid at the cathode.
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