LCR network

[Zerberus]

Re: LCR network

Once again, Reading will help you more than talking... and annoy us less...

ALL of these links have been posted before:

http://www.seymourduncan.com/support/faqdescr.shtml#resonant_peak
http://www.seymourduncan.com/support/seymours_q_and_a_4.shtml#204

Again for reference purposes: http://www.seymourduncan.com/support/faq.shtml
http://www.seymourduncan.com/support/seymours_q_and_a.shtml

 

[Marcel]

Re: LCR network

http://en.wikipedia.org/wiki/LCR_circuit
http://www.buildyourguitar.com/resources/lemme/index.htm
+ zerbs links which are not that theoretical

 

[walters]

Re: LCR network

How do you measure the resonant peak of a pickup?
We measure it directly by sweeping the pickup from 20 Hz to 20 KHz, driving it from a constant current source. We then measure the voltage magnitude across the coil and graph the change in voltage versus frequency. The impedance peak can be determined by the point of highest voltage magnitude. We use a function generator, X-Y Chart recorder and an oscilloscope along with some special equipment built in-house.


Calculating resonance can be tough because you must know the capacitance of the pickup, which is difficult or impossible to measure directly. For the record, the formula is Fr=1/2pi * square root of LC.


This doesn't explain why or what is doing it , is it the magnet and why
or is it the wire turn ratio what is causing this resonant peak of a pickup
its not tell me at all what its causing this resonant peak or resonance frequency can u please explain to me why or what?

 

[walters]

Re: LCR network

What effect does magnet wire gauge have on DC resistance and resonant peak.
As a general rule..using the same number of turns on a pickup and different gauges of magnet wire will give you different DC resistance’s and Different resonant peaks. Winding a coil with 8,000 turns of 42 AWG will sound brighter and have a higher resonant peak than a coil wound with 8,000 turns of 43 AWG magnet wire


It still doesn't say really what is causing the different resonant peaks
its it the guage? its it the wire? is it the DC resistance? is it the magnet?

 

[Zerberus]

Re: LCR network

.......It still doesn't say really what is causing the different resonant peaks
its it the guage? its it the wire? is it the DC resistance? is it the magnet?

..Is it a COMBINATION maybe?

 

[Marcel]

Re: LCR network

http://www.gitarrenelektronik.de/elektronik/c-switch/c-switch.html
http://en.wikipedia.org/wiki/Inductor

"how it's wired" => R,C,L
R,C,L + extern electronic => resonance frequence

 

[walters]

Re: LCR network

So the Magnet = is a inductor because of flux,magnetic fields like
a inductor

The Guage of wire- is the capacitance

The wire windings- is the resisantance

Total= LCR= DC resistance= impedance= Resonance Frequency >?

 

[walters]

Re: LCR network

If fender used Alnico 5 then this is a constant FIXED
The only difference is the winding differences and gauge of wire

so L = magnet= constant

C= wire guage

R= Winding differences

 

[Marcel]

Re: LCR network

If fender used Alnico 5 then this is a constant FIXED
The only difference is the winding differences and gauge of wire

so L = magnet= constant

C= wire guage

R= Winding differences

L not constant...
same nr. of windings + same gauge => R = constant
same winding + same gauge + exact same winding method => C = const
everything the same => L=const

 

[walters]

Re: LCR network

L is constant if fender used Alcino 5 in all 50's and 60's strat

How would L (magnet) be not constant Fix?

 

[Marcel]

Re: LCR network

L is constant if fender used Alcino 5 in all 50's and 60's strat

How would L (magnet) be not constant Fix?

its a multilayer coil
L is af function of the permability of the core, and of every (!!!) winding parameter
L has nothing to do with a magnet....

 

[walters]

Re: LCR network

its a multilayered coil

How it is a Multi layered coil?



L is af function of the permability of the core, and of every (!!!) winding parameter
L has nothing to do with a magnet....

Then where does Inductance come from in a guitar pickup ?

Where does it get the permability of the core?

The core of the magnet?

 

[Martian]

Re: LCR network

Walters rules.

+1

 

[Zerberus]

Re: LCR network

its a multilayered coil

How it is a Multi layered coil?

Remove the cover off ANY pickup and you´ll see instantly why..... but I think it´s pretty obvious that you´re not going to have 9000 turns all stacked vertically nice and clean above each other... Pickups would be several feet high if that were the case.

 

[walters]

Re: LCR network

Yea its not linear unless u dill more wood in your guitar to make a Longer height pickup to make the 9000 turns linear

If u keep wrapping the wire about then yea its going to be layered

But what does layering the wire do?
Doies laying change the inductance? and why?

 

[Jeff_H]

Re: LCR network

Hi Lee

 

[Marcel]

Re: LCR network

can you read formulas....
http://en.wikipedia.org/wiki/Inductor

but remember that are the simplest... for ideal coils ... there is nothing ideal in a pub

 

[walters]

Re: LCR network

More windings= more flux and more magnetic field or stronger

Layered windings- just makes the flux,magnetic field stronger

Does it change the inductance?

Underwound pickups has less inductance? because of less windings?
overwound pickups has More inductance? because of more windings?

 

[Marcel]

Re: LCR network

the length of the wire + the gauge make the dc resistance ... that's the only simple euaqtion!!
you can wire the same length different... that is what every kid knows...

that means different winding number (maybe the same) and different winding "pattern"
that leads to different C and different L

.........

 

[Jeff_H]

Re: LCR network

I suggest pancakes.