The bifilar pancake coil at its resonant frequency

[synchro1]

@Mags,

If you have an Inductance meter, try hooking it up to the coil while you run your frequency scan, and see at exactly what frequency the Inductance drops to zero. Any reading that appeared with a minus sign in front would indicate the presence of a magnetic field.

[TinselKoala]

The coil field increase factors directly into electrical power units that can be deducted from the input for an accurate COP. A negative Henry is the measure of the coil's magnetic field strength! Joseph Henry's formula of Inductance allows us to measure the field strength in units of negative inductance, and give that an equivalent value in electrical power units.

I just love it when you refute your own nonsense yourself, with information you find when finally googling the terms you misuse so flagrantly.
Nowhere in those various equivalent expressions for the Henry does an expression for ELECTRICAL POWER exist. ELECTRICAL POWER is measured in WATTS, the units of which are Joules/second. You will note that I TOLD YOU several times earlier that the Henry can be expressed as Joules/ampere², which DOES appear in that chain of equivalent expressions. If a "negative henry" is "equivalent" to "watt-hour" as you have repeatedly claimed.... since the watt-hour is an expression of ENERGY NOT POWER...  you once again are getting all tangled up with your own claims and the solid refutations from the material you yourself post.

[TinselKoala]

@Mags,

If you have an Inductance meter, try hooking it up to the coil while you run your frequency scan, and see at exactly what frequency the Inductance drops to zero. Any reading that appeared with a minus sign in front would indicate the presence of a magnetic field.

And if you damage your delicate inductance meter by applying a voltage from your FG while doing this, I'm sure Synchro will happily pay for a replacement. Won't he?

The presence of an alternating magnetic field is indicated by the ability of the coil to induce an alternating voltage in a nearby coil... something that has been shown to occur throughout the frequency ranges scanned. Of course one needs to be able to interpret oscilloscope screens to see this fact.

Furthermore, the inductance of coils we are testing never "drops to zero" and this is clearly indicated by the results of the frequency scans.

[TinselKoala]

TK

Are you able to power a small load(E.G an LED) from a pickup coil(secondary) placed on top of the BPC,without it effecting this zero voltage across your CVR.?


Brad

No, when powering a LED load at the TBF's resonant frequency the CVR voltage trace does not quite "flatline" any more, it indicates about half a milliamp at flattest. This is with just enough amplitude of the signal input to the TBF to produce a slight glow in the LED. Of course if I go off the resonant frequency I can get a lot more power to drive the LED much more brightly from the pickup coil, especially if I go to the pickup coil's own resonant frequency, as the previous frequency scans show. The CVR trace grows then too. 

Here's a scopeshot of the "flattest" CVR line while powering a slightly glowing LED from the pickup coil. Yellow=CVR trace, with the current value shown being a little smaller than actual because the scope thinks I'm using a 10 ohm CVR but actually I'm using 9.4 ohms. Blue = across LED and pickup coil.

[Magluvin]

No, when powering a LED load at the TBF's resonant frequency the CVR voltage trace does not quite "flatline" any more, it indicates about half a milliamp at flattest. This is with just enough amplitude of the signal input to the TBF to produce a slight glow in the LED. Of course if I go off the resonant frequency I can get a lot more power to drive the LED much more brightly from the pickup coil, especially if I go to the pickup coil's own resonant frequency, as the previous frequency scans show. The CVR trace grows then too. 

Here's a scopeshot of the "flattest" CVR line while powering a slightly glowing LED from the pickup coil. Yellow=CVR trace, with the current value shown being a little smaller than actual because the scope thinks I'm using a 10 ohm CVR but actually I'm using 9.4 ohms. Blue = across LED and pickup coil.

So in your first paragraph you are saying you get more induced into the secondary by not being at resonance with the input than if you are at resonance? That was the statement before especially with a freq of the sec res freq.


Are the bumps showing the 'off res freq' you are using?

Mags