what is vacuum tubes ?

well, ,In electronics, a vacuum tube, electron tube inside North America, thermionic valve, or just valve elsewhere, especially in Britain, is a device used to amplify, switch, otherwise modify, or create an electrical signal by controlling the movement of electrons in a low-pressure space, often tubular in form. Many devices called vacuum tubes are filled with low-pressure gas: these are so

what do you mean by vacuum tubes ?

well Rocky,In electronics, a vacuum tube, electron tube inside North America, thermionic valve, or just valve elsewhere, especially in Britain, is a device used to amplify, switch, otherwise modify, or create an electrical signal by controlling the movement of electrons in a low-pressure space, often tubular in form. Many devices called vacuum tubes are filled with low-pressure gas: these are so

Which company invented the transistor in 1947?

hi thereBy 1906, because of the work of Lee de Forest, inventors knew the two basic functions of a vacuum tube -- converting alternating current to direct current and amplifying an electronic signal. Over the decades, vacuum tubes were improved and were used in more and more complicated circuitry. At the 1939 Worlds Fair, for example, vacuum tubes were showcased in fully electronic television

what do you mean by vacuum tubes

A vacuum tube also called an electron tube or, in the UK, a valve is a device sometimes used to amplify electronic signals. In most applications, the vacuum tube is obsolete, having been replaced. At the highest power levels, some tube circuits have power supplies delivering several kilovolts.source :http://whatis.techtarget.com/def inition/0,,sid9gci213686,00.html...A vacuum tube is just that: a glass tube

My computer is making a loud noise that sounds like a fan going bad. A friend told me I should replace the power supply. Can i install myself,pl guide

. But most probably if you have a vacuum cleaner at hand, then problem will be solved.1. Remove the both side covers of CPU Cabinet.2. Before removing the cover, remove the Input power.3. Use the vacuum layman....First thing is it will depend on your knowledge and some min. tools such as screwdriver set. The problem might be SMPS Fan Most likely or CPU Fan. But most probably if you have a vacuum cleaner

What is the relation between temperature and vacuum?what is the relation vacuum and ejector pump?please give the answer in detail?

how vacuum can be created in vacuum filling machine.

Vacuum filling machine and methodUnited States Patent 5347793http://www.freepatentson line.com/5347793.htmlA vacuum filling machine and method are provided for use in filling a porous pouch communication path between the pouch and a source of microporous powder. A vacuum source communicates with an interior of the housing and the back side of the plate with perforations through a vacuum shroud

What is the difference between central vacuum cleaner and the conventional vacuum cleaner?

I have vacuum cleaners. It is worked in 2 years, now it does not collect any dust, but running a machine, what happens in my vacuum cleaner and what can i do?

Is maintenance necessary to vacuum cleaner? How often vacuum cleaner should be maintained by me?

depends on usage...everytime after u use it before packing

Why do people keep running over a string a dozen times with their vacuum cleaner, then reach down, pick it up, examine it, then put it down to give the vacuum o

If nature abhors a vacuum, then why doesnt the vacuum of space suck a way all of the Earths atmosphere?

From our daily experience with nature, it does seem like nature abhors a vacuum. If you create a vacuum inside a container here on Earth, nature will fill the container with air very quickly if you give it the chance for example, by puncturing the container. On the other hand, we know that outer space is a giant vacuum. Outer space is infinitely larger than Earth, so 99.9999999... of our universe

if sound does not travel thru vacuum, will vacuum filled ear muffs be very effective?

What does AC and DC stand for in the electrical field?

also be through semiconductors, insulators, or even through a vacuum as in electron or ion beams. In direct current, the electric charges flow in the same direction, distinguishing it from alternating vacuum as in electron or ion beams. In direct current, the electric charges flow in the same direction, distinguishing it from alternating current AC. A term formerly used for direct current was Galvanic

Write short note on Vaccuum Tubes

vacuum tube, electron tube inside North America, thermionic valve, or just valve elsewhere; is a device used to amplify, switch, otherwise modify, or create an electrical signal by controlling the movement of electrons in a low-pressure space, often not tubular in form. Many devices called vacuum tubes are filled with low-pressure gas: these are so-called soft valves or tubes; as distinct from