Solid States Devices > Resonance Circuits and Systems

Selecting the right L/C ratio for tank coils

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Thaelin:
   Since many different values of L/C can be used for the same frequency, how do you select the best pair for a given frequency?  I am working in the 20 to 80 khz area.


thay

NdaClouDzzz:
I would think something along these lines:
https://youtu.be/r0Fq2BCtlOM


boguslaw: "Please explain your method of finding resonant frequency"

Armagdn03: "Two methods. One is to place the oscilloscope probe hear the coil and note when you have maximum peak to peak voltage. Two, place some sort of visual indicator in line with the resonant circuit....In this case a incandescent lamp. When the lamp is brightest you have minimum impedance within the circuit indicating resonant frequency"  http://www.energeticforum.com/forum/energetic-forum-discussion/renewable-energy/14511-energy-propagation?p=436362#post436362

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-6/parallel-tank-circuit-resonance/

https://youtu.be/x-1EKjOtrPM

https://youtu.be/R2y9w9cbwcg

Magluvin:

--- Quote from: Thaelin on January 27, 2021, 03:40:31 PM ---   Since many different values of L/C can be used for the same frequency, how do you select the best pair for a given frequency?  I am working in the 20 to 80 khz area.


thay

--- End quote ---
Well according to Tesla, you would want your resonant freq to be low. From what I understand, 50khz and up will radiate magnetic energy that you cant get back into the system. Loss.  So large inductance and small capacitance would be a criteria to follow.
Mags

MasterPlaster:

--- Quote from: Thaelin on January 27, 2021, 03:40:31 PM ---   Since many different values of L/C can be used for the same frequency, how do you select the best pair for a given frequency?  I am working in the 20 to 80 khz area.


thay

--- End quote ---
It is not as precise as you think. Just tip over the box of capacitors and grab one then,  find an inductor that satisfies the equation.
As an alternative, my ex-wife used to select the capacitor by colour!

AlienGrey:
It all sounds like you have all need treated or taught via the mushroom method (kept in the dark and fed bull shit)   

But doing it all on a hit and miss basis like your saying your going to have poor Q factor, err so what’s Q ? don’t you think you had better find out ?

While your at it find the right capacitor value to match your frequency to your inductance.


SIL

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