Once ionization has occurred in a thyratron, what control  does the control grid have over the tube’s operation?

1 Answer

Answer :

None.

Related questions

Description : What are the basic components of a thyratron modulator?

Last Answer : ower source, a circuit for storing energy, a circuit for discharging the storage circuit, and a pulse transformer.

Description : The suppressor grid is added to a tetrode to reduce what undesirable characteristic of tetrode operation?

Last Answer : Secondary emission.

Description : What effect does the shielding of the screen grid by the control grid have on plate current in beam-forming tetrodes?

Last Answer : By increasing the number of electrons that reach the plate, plate current is increased.

Description : Why the control grid of a triode amplifier is negatively biased?

Last Answer : To prevent them from drawing grid current.

Description : A tube has a transconductance of 800 mhos and a load resistor of 50 kohms. When control grid voltage varies by 6 volts, the plate voltage will vary by what amount?

Last Answer : 240 volts.

Description : If the mu of a tube is 85 and the signal at the control grid is 4 volts ac, the plate voltage will vary by what amount?

Last Answer : 340 volts.

Description : The plate voltage of a tube will vary 126 volts when a 3-volt ac signal is applied to the control grid. What is the gain of this tube?

Last Answer : 42.

Description : When is a control-grid modulator used?

Last Answer : In cases when the use of a minimum of af modulator power is desired.

Description : 2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in ... the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu

Last Answer : B) Au

Description : What are two advantages that gas-filled tubes have over conventional electron tubes?

Last Answer : a. They can carry more current. b. They maintain a constant IR drop across the tube

Description : What are the four main classes of regular variation which affect the extent of ionization in the ionosphere?

Last Answer : Daily, seasonal, 11-year, and 27-days variation

Description : . What causes ionization to occur in the ionosphere?

Last Answer : High energy ultraviolet light waves from the sun.

Description : How may the tr tube ionization speed be increased?

Last Answer : Apply keep-alive voltage.

Description : What is the major difference in grid construction between power pentodes and conventional pentodes?

Last Answer : Conventional pentodes have a staggered grid arrangement, while power pentodes have a shielded grid arrangement.

Description : What serves as a grid in a magnetron?

Last Answer : A magnetic field.

Description : How does transit time affect the relationship of the grid voltage and the plate current at high frequencies?

Last Answer : Transit time causes the grid voltage and plate current to be out of phase

Description : In a circuit using grid-leak biasing, the coupling capacitor (Cc) chargcharge path?

Last Answer : rkg, the cathode to grid resistance.

Description : Why does the grid have a greater effect than the plate on electron flo

Last Answer : Because it is closer to the cathode.

Description : What undesirable effect does the screen grid in a tetrode create?

Last Answer : Secondary emission, and noise.

Description : How does the addition of a screen grid in a tetrode reduce interelectrode capacitance?

Last Answer : The interelectrode capacitance (cpg) is divided between two series capacitances; thus, cpg is greatly reduced.

Description : What are the problems in station operation due to grid under frequency?

Last Answer : a) Turbine having under frequency limitation, house load happen if < 48 Hz b) Due to under frequency PHT flow reduces, therefore reactor power reduces, generator power reduces c) If frequency is ... Hz DG cannot be synchronised to grid, therefore DG kept on isolation running d) GT overfluxing. 

Description : What are the problems in station operation due to grid under voltage?

Last Answer : a) All the HT motors overloaded. b) VAR load increases on generator leads to heating up of rotor c) Stator current increases for same power export leads to stator over heating.

Description : Cold-cathode tubes can be used as voltage regulators because of what characteristic?

Last Answer : They have the ability to maintain a constant voltage drop across the tube despite changes in current flow.

Description : Why can acorn and doorknob tubes NOT handle large amounts of power?

Last Answer : The close spacing of tube elements allows for the ready formation of arcs or short circuits.

Description : How do uhf tubes counter the effects of transit time?

Last Answer : By reducing the spacing between tube elements.

Description : Beam-forming tubes and power tubes are similar except that power pentodes lack what element?

Last Answer : Beam-forming plates.

Description : During which of the transmit or receive cycles are both the tr and atr tubes of a parallelconnected duplexer ionized (arcing)?

Last Answer : Transmit.

Description : How did vacuum tubes cause a problem for first generation computers

Last Answer : They were unreliable, required a lot of power to run, and produced so much heat that air conditioning was needed to protect computer parts.

Description : In electronic computers, vacuum tubes were replaced by transistors and transistors have been replaced by what device?

Last Answer : Integrated circuits.

Description : When designing vacuum-tube circuits, what characteristics of tubes must be taken into consideration?

Last Answer : Differences in performance of tubes of the same type

Description : Vacuum tubes are designed to operate in what portion of the Ep - Ip

Last Answer : The linear portion.

Description : Normally, how are high-power rf tubes tested?

Last Answer : In their circuit.

Description : The Lorax tried talking the once-ler out of chopping down the truffle trees until some event occurred what happened that convinced the once-ler he was right?

Last Answer : He sold a thneed, which he made from the trees.

Description : What was the main disadvantage of vacuum tubes? A) They were larger in size B) They consumed a lot of electricity C) They produced heat and often burned out D) The operation cost was high

Last Answer : Answer : C

Description : __________ tubes are good substitute for human blood vessels on heart by-pass operation. (A) PVC (B) Polythene (C) Teflon/Dacron (D) Polystyrene

Last Answer : (C) Teflon/Dacron

Description : As shown in the illustration, once the "LV" relay is energized for operation, what contacts must remain closed to maintain the "LV" relay energized when the control lever is moved away from the "off" or "stop" ... . B. Reset contacts. C. Upper set of "LVa" contacts. D. Lower set of "LVa" contacts.

Last Answer : Answer: C

Description : Does anyone know which is a good Grid control to get for .NET?

Last Answer : Of the ones that I’ve used in the past, i always found the Infragistic controls to be top class. Having said that though, I always found the Janus grids the prettiest. So for functionality I’d go with Infragistics, for appearance, Janus.

Description : QFor generating Coons patch we require a.A set of grid points on surface b.A set of control points c.Four bounding curves defining surface d.Two bounding curves and a set of grid control points

Last Answer : c.Four bounding curves defining surface

Description : A triac thyristor functions as a control device and is basically ________________. A. two NPN transistors in parallel with a common base lead B. a diode in series with a temperature sensitive capacitor C. two ... -back SCR's with a common gate lead D. a triode tube with an extra heavy grid element

Last Answer : Answer: C

Description : Where is the brightness control located in a TV? A. The audio section B. The video section C. The grid-cathode circuit D. The front panel

Last Answer : A. The audio section

Description : Surveys which are carried out to provide a national grid of control for preparation of accurate  maps of large areas are known  (A) Plane surveys  (B) Geodetic surveys  (C) Geographical surveys  (D) Topographical surveys

Last Answer : (B) Geodetic surveys 

Description : In an oscilloscope, ___ adjusts the brightness of the spot by chaning the current on the control grid.

Last Answer : intensity control

Description : Which are the main components of Oracle Grid Control?

Last Answer : OMR (Oracle Management Repository), OMS (Oracle Management Server) and OMA (Oracle Management Agent).

Description : Of the following statements, which best distinguishes ordinary negligence from gross negligence? a. The more material the undetected error the greater the likelihood of ordinary negligence. ... care denotes ordinary negligence, whereas failure to exercise minimal care indicates gross negligence

Last Answer : Failure to exercise reasonable care denotes ordinary negligence, whereas failure to exercise minimal care indicates gross negligence

Description : What is the best birth control method besides having my tubes tied?

Last Answer : My wife and I use this method. We planned to have two kids and now we don’t want any more. http://familydoctor.org/online/famdocen/home/women/contraceptive/126.html

Description : Why should the coating material be replaced once the required repair has been completed?

Last Answer : To ensure protective characteristics are maintained

Description : What type of antenna radiates in and receives energy from all directions at once?

Last Answer : Omnidirectional.

Description : The field arrangements in waveguides are divided into what two categories to describe the various modes of operation?

Last Answer : Transverse electric (TE) and transverse magnetic (TM).