Chokes? and other random questions...

[jazzyfingers04]

Hey, I have been looking around at various amp parts and schematics lately, trying to understand tube amps a little better. I am wondering about the purpose of the choke in a circuit. What do they do?

ok then, how many ohms does an average guitar preamp put out on the line?

[sir_modulus]

chokes can take out the HIGH (like real high) freq's from a circuit (radio signals) They can also be used in a LC circuit. Like an RC (resistor - capacitor) circuit, an LC (Inductor (L) - Capacitor) Can be set a filter.

[petemoore]

THanks, that was pretty easy, learn something everyday around here!

[Peter Snowberg]

Chokes are the opposite of capacitors.  :mrgreen:

They work as low-pass filters where capacitors work as high-pass filters.

Take care,
-Peter

[toneman]

2 choke or 2 B choked,
*that* is the question.....

FROM:  http://www.wordiq.com/dictionary/choke.html

choke :
      n 1: a coil of low resistance and high inductance used in
           electrical circuits to pass direct current and attenuate
           alternating current [syn: choke coil, choking coil]
      2: a valve that controls the flow of air into the carburetor of
         a gasoline engine
more.....

FROM:  http://www.wordiq.com/definition/Capacitor

A capacitor (historically known as a "condenser") is a device that stores energy in an electric field, by accumulating an internal imbalance of electric charge.


Definition of Capacitance:
A capacitor is an electronic component used for storing charge and energy. The usual capacitor is a pair of parallel plates separated by a small distance. When a steady voltage is applied across a capacitor, a charge +Q is stored on one plate while -Q is stored on the opposite plate. The amount of charge is determined by the capacitance C and the voltage difference V applied across the capacitor:

FROM: http://www.pa.msu.edu/courses/2000spring/PHY232/lectures/capacitors/definition.html
Since the charge cannot change instantaneously, the voltage across a capacitor cannot change instantaneously either. Thus capacitors can be used to guard against sudden losses of voltage in circuits.

Bottom line:
Capacitors oppose change in voltage.
Chokes(inductors) oppose change in current.
Capacitor stores energy in electric field.
Chokes stores energy in magnetic field.

tone
this is the bottom line.