0
A capacitor whose capacitance is variable (within some range). They are usually used to adjust resonant circuits or delay circuits.
Mossie Lueilwitz
Wiki User
∙ 10y agoA device that fine tunes a radio receiver.
Add your answer:
Earn +20 pts
Working of gang capacitor?
A: In the old radios the tuning was done by meshing aluminum plates in-out to achieve different capacity and the plates were many therefore gang for ganged together
Can you by-pass a capacitor in an electric motor?
You can not by-pass the capacitor in an electric motor. Most are capacitor-start motors which require the capacitor to be operational in order to start. If the capacitor is not working then it will need to be replaced.
What is the basic function of tuning capacitors?
The "tuning capacitor" in a radio is involved in determining the frequency of an oscillator somewhere in the radio. As that capacitance is varied, the frequency of the oscillator changes. If the radio device is a transmitter, then the frequency on which it's transmitting changes. If the device is a radio receiver, then the frequency of the internal "local oscillator" determines the frequency that will be selected, out of everything coming down from the antenna, and then processed, detected, amplified, and filtered, for your listening pleasure.
Flying capacitor multilevel inverter?
what is flying capacitor
Why is there a C in the equation for a discharging capacitor?
The C represents the capacitance (in farads) of the capacitor. It is a measure of how much charge a capacitor can hold. This is needed to know how much energy the capacitor is holding.
What is a tuning capacitor?
A capacitor whose capacitance is variable (within some range). They are usually used to adjust resonant circuits or delay circuits.
How a trimmer capacitor use?
A trimmer capacitor is a semi-adjustable capacitor placed across a variable tuning capacitor and pre-set to allow the main capacitor to track correctly with another variable capacitor on the same shaft. The adjustment takes out any differences introduced by the connected circuit.
What variable capacitor used for tuning radio?
In radios that aren't solid state, and use variable capacitors for tuning, the air-dielectric variable capacitor is the almost universal choice for radio frequency applications. More information on air variable capacitors is available at www.orenelliottproducts.com.
What is the function of varactor diode?
Voltage controlled variable capacitor. Usually used for dynamic tuning of resonant circuits.
What is gang tuning?
ganged tuning is used in the FM radios in order to change from one FM radio station to another ,particularly a variable capacitor is used so as to vary the value of capacitance in order to acuire different freq ranges available
Working of gang capacitor?
A: In the old radios the tuning was done by meshing aluminum plates in-out to achieve different capacity and the plates were many therefore gang for ganged together
What radios have 365 pf tuning capacitors?
AM broadcast - 535~1605 kHz tuning range. The 365 pF cap is most likely in the aerial circuit, as most modern receivers would use a smaller-value section for local oscillator tuning. Alternately, a set may use the *same* value for aerial and local oscillator, with a padding capacitor to reduce the effective max value of the oscillator section.
What are the applications of a Q-METER?
The Q meter can be used for many purposes. As the name implies, it can measure Q and is generally used to check the Q factor of inductors. As the internal tuning capacitor has an air dielectric its loss resistance is negligible compared to that of any inductor and hence the Q measured is that of the inductor.The value of Q varies considerable with different types of inductors used over different ranges of frequency. Miniature commercial inductors, such as the Siemens B78108 types or the Lenox-Fugal Nanored types, made on ferrite cores and operated at frequencies up to 1 MHz, have typical Q factors in the region of 50 to 100. Air wound inductors with spaced turns, such as found in transmitter tank circuits and operating at frequencies above 10 MHz, can be expected to have Q factors of around 200 to 500. Some inductors have Q factors as low as five or 10 at some frequencies and such inductors are generally unsuitable for use in selective circuits or in sharp filters. The Q meter is very useful to check these out.The tuning capacitor (C) of the Q meter has a calibrated dial marked in pico-farads so that, in conjunction with the calibration of the oscillator source, the value of inductance (Lx) can be derived. The tuned circuit is simply set to resonance by adjusting the frequency and/or the tuning capacitor for a peak in the output voltage meter and then calculating the inductance (Lx) from the usual formula:Lx = 1/4π²f²CFor L in μH, C in pF and f in MHz this reduces to:25330/f²CAnother use of the Q meter is to measure the value of small capacitors. Providing the capacitor to be tested is smaller than the tuning range of the internal tuning capacitor, the test sample can be easily measured. Firstly, the capacitor sample is resonated with a selected inductor by adjusting the source frequency and using the tuning capacitor set to a low value on its calibrated scale. The sample is then disconnected and using the same frequency as before, the tuning capacitor is reset to again obtain resonance. The difference in tuning capacitor calibration read for the two tests is equal to the capacitance of the sample. Larger values of capacitance can be read by changing frequency to obtain resonance on the second test and manipulating the resonance formula.A poorly chosen inductor is not the only cause of low Q in a tuned circuit as some types of capacitor also have high loss resistance which lowers the Q. Small ceramic capacitors are often used in tuned circuits and many of these have high loss resistance, varying considerably in samples often taken from the same batch. If ceramic capacitors must be used where high Q is required, it is wise to select them for low loss resistance and the Q meter can be used for this purpose. To do this, an inductor having a high Q, of at least 200, is used to resonate the circuit, first with the tuning capacitor (C) on its own and then with individual test sample capacitors in parallel. A drastic loss in the value of Q, when the sample is added, soon shows up which capacitor should not be used.
How do you spell tuning?
Tuning
In what tuning is one by metallica?
Normally standard tuning E tuning E low
What tuning is radio 1 in London?
the tuning is 98.7.
What is dc link capacitor?
when the DC current flows through the capacitor .the leakage of the charges is in capacitor called Dc leakage capacitor .
