Kapanadze and other FE discussion

[stivep]

question  to Wesley:

I used a stack of rings cores  wound it with 48 turns and added a parallel cap of 0.2 uf. 200nf
and fed it with 40khz resonance max amplitude placed one scope channel across the coil and stabbed each turn of the winding in turn
hoping to get a phase shift up the coil but all that changed was the amplitude.
Any idea's or what am I doing wrong ?

This  require
slow wave velocity 
https://www.britannica.com/science/wave-velocity
https://en.wikipedia.org/wiki/Phase_velocity
https://en.wikipedia.org/wiki/Phase_velocity

link below:
https://electronics.stackexchange.com/questions/369046/transfer-function-of-phase-change-controlled-with-capacitance
:
https://www.youtube.com/watch?v=SGel5QNSkIQ
for capacitive reactive  circuits.

other links;
RLC Circuits (5 of 14) Inductive Reactance; Phase Shift, Phasor Diagrams, Frequency, An Explanation
https://www.youtube.com/watch?v=qEjBHmXDBqo

https://www.youtube.com/watch?v=idf1JQ003nc
RLC Circuits (13 of 14) Summary of RLC Circuit Analysis

https://www.youtube.com/watch?v=30J5U0ThRUc
Phase Shift in AC Signals



https://www.youtube.com/watch?v=FHXZ9C914S0
Build A Simple Phase Shift Circuit
this should be easy enough
basically  without going to anything difficult
it is behavior of capacitive reactance and inductive reactance in the  same circuit.
and that can be shown easily on Smith Chart
https://en.wikipedia.org/wiki/Smith_chart

other example:
from practical stand point
1.If you feed two coils with the same signal   but number  of turns is  different  than you get phase shift
2 If you feed straight piece of wire and  coil from the same signal  than you get phase shift
3. if you feed  two exact coils with  the same signal but one coil has capacitor in series than you get phase shift ( however  F  of resonance will not be the same)
4. if you feed  two exact coils with  the same signal but one coil has capacitor in parallel  than you get phase shift ( however  F  of resonance will not be the same)
5. if you feed  two exact coils with  the same signal but pitch ( space  between winds is not the same)  than you get phase shift
  and so on.....
6. take two coils but  one of  the coils will have few winds in  CCW  you  will get   phase shift

hint:
1.wind two windings  on the former  with   the same number of winds.like bifilar.
2.connect two ends  together at the bottom and two  ends together   from the other side   of assembly.
3.  feed it from the same generator
4. now try to short   few winds  of  one of the coils with piece of wire and look at scope.
you will see two signals separated by delay.
if you carefully  chose the <short point> you  will regulate phase.
but to  see  that you need to adjust frequency !!!!!

one possible explanation out of many:
if there is difference between two coils in length  of the wire  than one signal from one of the coils will arrive faster than the signal from second coil.
the signal from  the coil with more  winds is called slow wave 


Wesley

[kolbacict]

However  that device or rather   mechanical concept  of two pancake shape coiled springs ( mechanical watch  springs)

I assumed that these were not coil springs, but trajectories of motion of some mass.

[stivep]

It doesn't matter .

coil springs, but trajectories of motion of some mass.

is 
-the classical mechanics.


Wesley

[groot]

Standing wave and resonance - two required conditions to send energy via surface wave.
Do we have standing wave at resonance in series LC circuit ( tesla coil ) or
they are adjusted separately?
Magnet wire is sold in spools of aprox. length. Unfortunately i have wind my coils without
making a measurement. Now this two "same" coils are not same at all.
How can i choose top load capacitance to get all the numbers right.
"Approximately" 500 feet 25awg wire and coil  has  3.89mH  . I tried to measure  ohms and
compare it to online calculators but its not taking me anywhere.

Thx



 

[forest]

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