Variable Capacitors

i cant find the correct value for a variable capacitor in a small AM transmitter circuit what to do?

i cant find the correct value for a variable capacitor for an AM transmitting circuit i want to make, it is always a problem to find variable capacitors…is it possible to put a capacitor in series or parrallel to a variable capacitor in order to tune a circuit?
also i have included a link to the circuit. thankyou very much in advance for any help

no link

you can use a parallel cap to bring a lower value variable cap up to the range you need, but then you will have less of an adjustment range. If you are not going to change frequency a lot, that may be ok.

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A microphone is an example of a transducer, a device that changes the sound from one form to another. Audio exists in the air pressure patterns, changes in patterns This current electric microphone.

Microphones vary greatly in quality. A high end microphone recording studio can cost thousands and in many cases are needed for the recordings of the best. A variety of mechanical techniques can be used in building microphones. The two most commonly found in the recording studios are the magneto-dynamic and variable condenser designs.

All microphones convert sound energy into energy electricity, but there are many different ways to do the job, using electrostatics, electromagnetism, piezo-electric effect, or even through a change in the resistance of carbon granules. When it comes to microphones used in recording studios, the vast majority of microphones used are the capacitors, electrostatics, or dynamic.

Both types employ a moving diaphragm to capture the sound, but make use of a different electrical principle for converting the mechanical energy into an electrical signal. The efficiency of this conversion is very important, because the amount of acoustic energy produced by the voices and instruments Musicals are so small.

Different types of microphones used in recording studios

In live sound, almost all the microphones used are dynamic. In the study, instruments like drums, electric guitars and basses are recorded using dynamic microphones. Dynamic microphones have the advantages of being relatively cheap and durable, and do not need a power supply or battery to operate them.

Dynamic microphones are most effective when working with relatively strong sound sources that do not contain a lot of very high frequency details. Instruments are also hard to make good for recording studios. Another type of dynamic microphone is the ribbon microphone, but this is only used in fairly esoteric recording applications by engineers who appreciate the subtleties of sound on the tape.

These microphones are composed of a thin metal ribbon suspended in a magnetic field, and when you find the sound energy, generated electrical signal is induced in the tape, rather than a voice coil. The main advantage of the microphones Tape is the soft sound that makes them perfect detailed environmental study.

Condenser microphones are more expensive than their dynamic counterparts, and are also much more sensitive, and can capture high frequency detail much more accurately. Although relatively efficient, like dynamic microphones, condenser microphones to produce a small electrical signal that requires a special type of build-in preamplifier to carry the signal levels usable. So they are suitable for use in live concerts and outdoor concerts. Capacitors are used primarily in recording studios where there is less noise.

Conclusion

The microphone is a ubiquitous piece of equipment. Found in everything from telephones and computers for recording studios, microphones are part of our daily lives. A professional studio to accumulate a diverse collection of microphones. The use of microphones of the best studies, such as Shure SM58S and 57s, AKG D112s, Sennheiser or 421S.

About the Author:

Victor Epand is an expert consultant for music gear, speakers, and microphones. You can find the best marketplace for music gear, speakers, and microphones at these 3 sites: music gear, DJ equipment, recording equipment, speakers, subwoofers, and Dymanic microphones, Capacitor microphones, Ribbon microphones.

Article Source: ArticlesBase.com – Microphones Used in Recording Studios