Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 13, 2025
It has since been employed by Fleming in England and De Forest in this country, and others, as the basis for wireless-telegraph apparatus. It is in reality a minute rectifier of alternating current, and analogous to those which have since been made on a large scale.
But when the positive half of an alternating current is made to flow through a large inductance it acts like a large resistance as before and likewise smooths out the current, but none of its energy is wasted in heat and so a coil having a large inductance, which is called an inductive reactance, or just reactor for short, is used to smooth out, or filter, the alternating current after it has been changed into a pulsating direct current by the rectifier tubes.
The Vacuum Tube Rectifier. This rectifier has two electrodes, that is, it has a filament and a plate like the original vacuum tube detector, The smallest size rectifier tube requires a plate potential of 550 volts which is developed by one of the secondary coils of the power transformer.
Why to declare, but because each particular in this divine promulgation was pointed to some circumstance, some propensity, some temptation, in their nature and condition, and was exactly fitted to be there applied as a rectifier and guard?
You will observe: that the terminals of the power transformer secondary coil which develops 10 volts are connected to the filaments of the oscillator tubes; that the terminals of the other secondary coil which develops 10 volts are connected with the filaments of the rectifier tubes; that the terminals of the third secondary coil which develops 550 volts are connected with the plates of the rectifier tubes; that the pair of filter condensers are connected in parallel and these are connected to the mid-taps of the two filament secondary coils; that the reactance coil and the third filter condenser are connected together in series and these are shunted across the filter condensers, which are in parallel; and, finally, a lead connects the mid-tap of the 550-volt secondary coil of the power transformer with the connection between the reactor and the third filter condenser.
I easily foresee that as soon as I lay down my pen this nimble operator will have stole it, and treat me as inhumanly as he has already done Dr. Blackmore, Lestrange, and many others who shall here be nameless. I therefore fly for justice and relief into the hands of that great rectifier of saddles and lover of mankind, Dr.
These electric waves surge through the closed circuit but when they reach the crystal detector the contact of the metal point on the crystal permits more current to flow through it in one direction than it will allow to pass in the other direction. For this reason a crystal detector is sometimes called a rectifier, which it really is.
The chief difference between a wireless telephone transmitting set that uses an alternating current and one that uses a direct current is that: a power transformer is used for stepping up the voltage instead of a motor-generator, and a vacuum tube rectifier must be used to convert the alternating current into direct current. The Apparatus You Need.
When this is done the plates will be positively charged alternately with every reversal of the current in which case there will be no break in the continuity of the oscillations set up and therefore in the waves that are sent out. The Operation of Rectifier Vacuum Tubes. The vacuum tube rectifier is simply a two electrode vacuum tube. The Operation of Reactors and Condensers.
But when the positive half of an alternating current is made to flow through a large inductance it acts like a large resistance as before and likewise smooths out the current, but none of its energy is wasted in heat and so a coil having a large inductance, which is called an inductive reactance, or just reactor for short, is used to smooth out, or filter, the alternating current after it has been changed into a pulsating direct current by the rectifier tubes.
Word Of The Day
Others Looking