Hi all,

please find here:

http://www.megaupload.com/?d=SIL3B8KL

The ECD movie named filmato.wmw (87 MByte)

Roberto

Ronotte:

The video can't be downloaded. It says something like 'error' in Italian. Maybe it's too large?

Thanks anyway.

chrisC

Just copy this into your browser address line: http://www.megaupload.com/?d=SIL3B8KL

swing

Hello all,

@Clive,

I can only say that I cant exact measure the amps because I havent the needed equipment.
Of course, its totally clear that with my analog meter I cant measure the input and output power.

I will ask Roberto if he can make this job. I hope he has such meters and a battery.

Otto

Hi Otto,

I would think it must be possible to measure the input current in the 230 Volt leading to your power supply (the mains current). This would give an indication of the total power consumed by your setup.
You know the mains is 220/230 V, so only need to put an amp meter in series BEFORE your power supply.....

Funny to hear you measure the frequwncy at around 178-180 Khz as that is being said to be the native frequency of magnetism.... (Cohler etc.)

regards

Robert

Hello all,

@Dutchy

yes, I can try to measure the amps from my mains but I have to tune a little my frequency because of my huuuum noise. I dont know if this nois is from my loudspeasker in the radio or from my power supply. I had no time to see whats going on with my newest setup.

@Roberto

If you have 2 secondaries try what I sayd: everything connected as usual exept the bulb. This bulb connect to the second secondary and see with your scope the sine waves. Make a good frequency mix and when the bulb shines measure the frequency. It should be at arround 170 - 190kHz.

Otto

@Darren,

yes it's probably a typo...sorry. For sure I'll double check it today and let you know. Of course I'll measure the bulb hot & warm resistance, please specify how you want me to measure it's capacitance: do you mean against ground?

For the Mobius I could also measure its capacitance between the two wires and against the ground...what do you suggest?

Roberto

@Darren,

here are the correct values:

Prymary: 0.023 mH
Secundary: 0.22mH

Cold bulb Resistance = 59.6 Ohm
Hot bulb Resistance = 420 Ohm  (similar light emission)

regards

Roberto

Thanks Roberto.

So to summarize and collect all info:

Primary: 0.5mm wire (24 AWG), 23uH, 0.5 Ohm, 4.2m

Secondary: 0.35mm wire (27 AWG), 220uH, 3 Ohm, 10.5m

Bulb: 60W, 230V
Bulb resistance Cold: 59.6 Ohm
Bulb resistance Hot: 420 Ohm (when operating in the ECD?)

Inter-coil capacitance: 485pF

Mobius inter-loop capacitance: 74pF

So if you can measure any inductance in the bulb, that would be great. If it is too small to measure, then that is ok too.

IMO, the capacitance contributed by the bulb between ZERO and PHASE should be extremely small. Let's not bother with that. The only way I know to measure it anyway, would be to see the bulb's self-resonant frequency, then calculate the C value from the known L (if it can be measured).

Thank you for the mobius and inter-coil capacitances. I will be incorporating them in the model.

Regards,
Darren

Hi All,

if you do not need a stand-alone DDS oscillator, for the same price you can buy a MUCH higher frequency DDS oscillator for the USB port, controlled by software.  See my post:

http://www.overunity.com/index.php/topic,2535.msg35477.html#msg35477

Regards, Earl

@Chrisc

Quote from: chrisC on June 26, 2007, 01:35:53 AM

Thank you for posting the DDS-20 kit. I sure would love to see your kit running. Please let us know if the output driver will drive the Control Coils directly or do you still need special fast switching output drivers?

Also, are you in Europe or the UK where you can buy these parts. Apparently there is no distributor in the US.

No, it needs to drive a mosfet driver then mosfet.
I tried to drive the mosfet directly but I think it overloads the output stage and it shuts down at the higher frequencies, say 5MHz.

Yes, I am in the UK, the kit was purchased from ELV in Germany, you should be able to order it for the US too.
http://shop.elv.de
Search for DDS 20 or 6847138
The kit does not include the AD811 so you can buy that from them or like I am doing, buy it from somewhere cheaper.
Its an easy kit to build and if you do decide to go for it I can help out if you get problems.
I have translated most of the manual now in English.
Rob

Chris,

will draw up a schematic to protect DDS from external spikes, maybe I have time tonight?

Regards, Earl

Hello Otto,

I've connected my already existing second secundary to 60W bulb as you suggested. Well I did obtained light but not so much and at lower freq than you suggested: about 60-70 KHz and anyway little effect for the third freq.

Then I thought to implement  the second CC  exactly as per your new specs and tried to connect it to 120 degree tap on collector. I did it but found only impulsive kind of waveforms, no way to get sinus. So I disconnected the tap and reconnected it to standard ZERO & PHASE. OK this time I found exactly what you said:

 - good light on bulb

- F1 = 165KHz, F2=160 KHz, F3 variable from 20-34 KHz

- sinus present, about 50% completed


Anyway I noted that:

1 - the sinus is very good only with 2 freqs

2 - inserting the 3rd freq you obtain some more power but the waveform does deteriorate a lot

3 - the amper meter on PS read about 2A @ 9V. The P.S. itself is less tampered by the ECD. On sweet point the voltage analog meter doe shoe the correct voltage ...same for current.

4- As I've used copper enameled wire of 0.5 and 0.165 mm, the CC gets hot especially when outside the proper freq range...and it takes a lot of time to cool again.

Final note.
As you have noted the sweet point 160 and 165 KHz gives exactly the famous or infamous SM 5Khz. And maximum output is exactly when the F2-F1=5KHz! + - 0.5Hz.

The comparison with the first CC still in his first place (near the Mobius beginning) is difficult as the standard design does permit:

-  much more accurate sinus formation control

- quality of sinus is much more better!

- the input current required is higher (about 4A)


On the other side the isolated connection of the bulb is highly reccomended...so I think that there is still much unexplorated ground. I hope that also the other that are replicating the ECD will contribute to clear the way.

Ciao

Roberto