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I've postulated a method in which one could use a vacuum tube equivalent of the 2N3055 in the SG circuit.
Of course tubes are high impedance, wheras solid state is low impedance. The inductors- power and trigger coil- would have to be rewound to be a higher impedance- say 5 to 8k ohms. This would as well require the use of something other than a battery, but if you think about it (and I know this will excite some of you out there) You need 150 volts to pass through the tube (lower voltages simply won't pass) And If you rectify the AC line (120 volts) you get 160 volts (because DC voltage is 1.4 times AC)
So, fir the first time, we have a nearly practical directly interfacable way to hook up such a motor to an AC line. Some things to remember- it takes a two cycles to charge the capacitor when rectifying the AC line- to run most efficiently the motor should run at 1800 pulses a second (or so)
As well, the "radiant pulse" that comes off the windings which is supposed to be good to charge batteries and capacitors, would be orders of magnituide larger than observed in the solid state circuit. As well, the tube should withstand abuse much better- much much better than any solid state device.
This could be an interesting way to go for someone in advanced research areas of bedini motors and things.
Heres the datasheet on that tube:
6CA7 pdf, 6CA7 description, 6CA7 datasheets, 6CA7 view ::: ALLDATASHEET :::
Its actually a rather sought after tube for higher end audio amplifiers, a replacement for the 6L6 which ewas used extensively through the 30s.
Its a beam power tube, and sice the beam is more confined not all of the anode has electron beam hitting it, so it can dissapate more heat, so this tube can handle more power than the 6L6.
You could, I suppose, try using impedance matching transformers, but I'd just assume redesign the whole circuit rather than add more lossy transformers- especially since this is a largely pulsed circuit, that would throw the timing off.
Anyhoo, good luck to whoever decided to take on this challenge- its a back burner project for me, but I'll get to it eventually perhaps...
Of course tubes are high impedance, wheras solid state is low impedance. The inductors- power and trigger coil- would have to be rewound to be a higher impedance- say 5 to 8k ohms. This would as well require the use of something other than a battery, but if you think about it (and I know this will excite some of you out there) You need 150 volts to pass through the tube (lower voltages simply won't pass) And If you rectify the AC line (120 volts) you get 160 volts (because DC voltage is 1.4 times AC)
So, fir the first time, we have a nearly practical directly interfacable way to hook up such a motor to an AC line. Some things to remember- it takes a two cycles to charge the capacitor when rectifying the AC line- to run most efficiently the motor should run at 1800 pulses a second (or so)
As well, the "radiant pulse" that comes off the windings which is supposed to be good to charge batteries and capacitors, would be orders of magnituide larger than observed in the solid state circuit. As well, the tube should withstand abuse much better- much much better than any solid state device.
This could be an interesting way to go for someone in advanced research areas of bedini motors and things.
Heres the datasheet on that tube:
6CA7 pdf, 6CA7 description, 6CA7 datasheets, 6CA7 view ::: ALLDATASHEET :::
Its actually a rather sought after tube for higher end audio amplifiers, a replacement for the 6L6 which ewas used extensively through the 30s.
Its a beam power tube, and sice the beam is more confined not all of the anode has electron beam hitting it, so it can dissapate more heat, so this tube can handle more power than the 6L6.
You could, I suppose, try using impedance matching transformers, but I'd just assume redesign the whole circuit rather than add more lossy transformers- especially since this is a largely pulsed circuit, that would throw the timing off.
Anyhoo, good luck to whoever decided to take on this challenge- its a back burner project for me, but I'll get to it eventually perhaps...
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