On 10/22/12 11:30 AM, Greg Cousen wrote:
Hi Mate,
Thank you for your reply, I have looked on the net but have not seen any
kits for the SSTCs, I have seen the rotary gap advertised as a kit, I
will
keep on looking, here in Aust our voltage is 230 / 240 @50hz,
I will look into the variable frequency idea, thanks again :)
I'm philosophically a big fan of the DC coil with a triggered spark
gap, but getting a decent DC supply in a small size is tricky (I have
a 30kV 10kW supply, but I don't have three phase power at home to run
it), and I've not gotten around to, say, putting three NSTs in
combination with a small rotary phase converter.
If you do the rotary gap technique, you can change the speed of the
rotor (using a motor speed control), but pitch changes will then all
have a glissando effect.
If you do rotary gaps you could have multiple rotors, running at
different rotation rates (say with a belt drive off your prime mover..
so you have one running at 1500 RPM, one running at 1000 RPM, etc.
That would give you your octave scale. By changing how many
electrodes are in use on a given rotor, you can get octaves (e.g.
using 2 fixed electrodes vs 4). You can also change the number of
electrodes on the rotor.
If you are mechanically inclined this might be a cool approach. You
could have a keyboard (or footpedal board) that actuates switches to
connect and disconnect the HV to the various rotary gaps. I've thought
about using small air cylinders as actuators to move a fixed electrode
towards and away from a rotor. You drive the cylinder through plastic
air hoses, so the cylinder floats at the HV potential. it would be
very steampunkish..
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla