@Conradelektro,


You need to discharge a nice size capacitor through the coil to permanently "Impulse magnetize" the iron plate along with the filings. Understand DUMBKOPF. You two knaves are just taking another shortcut around me!

Conrad:

QuoteWe use DC current.

- Lets say, I build two identical coils (dimensions, wire diameter, number of turns and core are the same).

- But the wire of one coil has a slightly higher resistance. So after the coils are wound, I measure the DC resistance and see that one coil has 60 Ohm and the other 80 Ohm DC resistance (just hypothetically, let's say the copper used for one wire had more impurities).

- So I put 60 Volt over one coil (the one with 60 Ohm DEC resistance) and 80 Volt over the other coil (the one with 80 Ohm DC resistance).

- Through both coils 1 Ampere will flow (U = R*I , 80 = 80 *1, 60 = 60 * 1) , therefore the two coils will produce the same magnetic field.

I am confirming for you that you are correct.

MileHigh

The Tesla series bifilar has 250,000 times the hi-voltage potential between the wraps. This is the power the impulse couples with in the pancake to transmute the iron into a higher isotope! The two of you meatheads are just proving yourselves to be nothing more then a couple of nitwits in front of everybody again!

Myself, impersonating "Cyrano de Bergerac", finest swordsman in all of France, once again challenges you pedantic knaves to insure another wager with LLoyds of London! I knew you chumps would fall flat on your faces again like a couple of suckers!

Conrad:

Okay, I have a very simple and effective test for you that will allow you to make a quite accurate comparison of the relative generated field strengths of the two types of coils when you pass current through them.

Here is the basic idea for the test:  You know that the coil will deflect a compass needle by a certain angle at some predefined distance and geometry for a certain amount of current flowing through the coil.  So all that you have to do is an A-B comparison between the two coils where you have the same physical setup (geometry) and the same current running through the two coils.  You can make the test for the compass needle deflection at one of more predefined distance and geometry configurations, it's up to you.  Will the two coils deflect the compass needle by the same amount for the same current?  That is the question.  If they do, then they are producing the same magnetic field.

Sound simple enough?   With the properly chosen setup(s) (distance and geometry) you will be able to make a very good A-B comparison test for magnetic field strength and direction between the two coils.  This will be a quite definitive test and should be quite easy to do.  We know that your two coils (monofilar and bifilar, pancake or solenoid) will have the same number of turns and the same geometry, which is exactly what we need for this test.

Okay, that was the preamble, let me do a separate posting with the actual test.

MileHigh

I could do the first magnetic field test with my compass.


- The compass is place in front of the pab cake coil (always in the same position and height) for both coils.

- When there is no current through the coil, the compass needle points true North (black number 270, red number 48).

- When there is current through the coil, the compass needle is deviated East (black number 315, red number 56)

- The compass needle moves in the opposite direction if the current flows through the coil in the reverse direction (plus and minus switched).


And of course, it is the same for both coils. Again there is no difference between bifilar and monofilar coil.


The laboratory power supply is set to 13.5 Volt, there is a 100 Ohm resistor between the coil and the the power supply (to limit the current to 135 mA, DC resistance of both coils is 0.4 Ohm). The current is the same through both coils.

I set the power supply to 13.5 Volt because the compass needle then moves to a number (not somewhere in between the numbers on the compass scale)


So far, the only difference detected between the bifilar and the monofilar coil is the self resonance frequency (and consequently the self capacitance).

Bifilar coil: self resonance at 3.9  MHz to 4 MHZ (self capacitance 45 pF to 49 pF)

Monofilar coil: self resonance at 8,5 MHz to 9 MHz (self capacitance (8 pF to 10 pF)


More magnetic field tests tomorrow.

Greetings, Conrad