Muller Dynamo

[chalamadad]

i don't have something to measure the rpm but when I connect the 1k resistor i can hear the speed increasing.i  just tried 2 1k resistors in parallel and the speed increases even more and the resistors are getting very hot.

You should get a speed-o-meter. Measuring by your ears sometimes can give you wrong impressions. At certain speeds I experienced it sounds as if the rotor is slowing down when it's actually increasing and vice versa. Don't get me wrong, I hope it is accelerating. Generally it's good if you can exclude measurement errors that can occur all the time. For instance when you are touching the FWBR legs accidently the output voltage goes up. These small things can easily lead to wrong conclusions and it makes sense to eliminate these sources of error a priori if possible.

[David70]

You should get a speed-o-meter. Measuring by your ears sometimes can give you wrong impressions. At certain speeds I experienced it sounds as if the rotor is slowing down when it's actually increasing and vice versa. Don't get me wrong, I hope it is accelerating. Generally it's good if you can exclude measurement errors that can occur all the time. For instance when you are touching the FWBR legs accidently the output voltage goes up. These small things can easily lead to wrong conclusions and it makes sense to eliminate these sources of error a priori if possible.

if I short the output to the bridge that has a capacitor in series the speed goes high up, no confusion even if I am old I can still hear
when I have a load ,1k resistor, the speed is not as much increased but still is not decelerating and the resistor is getting hot.
After I had few converstions on the phone with Romero he sugested that first I need to get the speed under short then find the limit on speed under a certain load.
Unfortunately i am always short of money and I need to wait until next week to buy more capacitors.

David

[chalamadad]

Just made a tesla-bifilar out of Litz wire and noticed that the resistance
does not double in comparison to the same coil connected "normally" as i had posted earlier. It shows only a slight increase, which actually makes sense because still the same length of wire is being used no matter how you connect it.
But the inductance has quadrupled (!)

So Mondrasek, this is what you talk about increasing the inductance while minimizing resistance

I've seen a N² in the formula for coil inductance. So if you've doubled the number of turns (N) by interconnecting the splitted unifilar coil strands like I did, it should quadruple.

[chalamadad]

even if I am old I can still hear

LOL!! That made me laugh! 

What did you adjust to achieve speed under short? Just caps in series?

Edit: Also looking forward to your future results!

[David70]

LOL!! That made me laugh! 

What did you adjust to achieve speed under short?

not too much, just the distance from the coils to the rotor. I don't have magnets on the back of the coils yet, I tried with ferrite magnets but no difference.
i get the speed under load only if i use the capacitor in series with the bridge.
Romero said that it can be obtained without the capacitors but requires a lot of work but if succeed that way the output will be greater.Having the capacitors in series will reduce the output by half or more but now I am only looking to have a simple and easy to tune generator.

David