plate voltage वाक्य
उदाहरण वाक्य
मोबाइल
- After 1976, the plate voltages were lowered slightly for improved reliability.
- I doubt that it used a very high plate voltage.
- Areas with 220 240 volt AC supplies could develop higher plate voltage with a simple rectifier.
- Like most A . F . amplifiers in radios, the plate voltage is usually less than 60 volts.
- Some tube will provide some amplification down to 22 volts of plate voltage, though the amplification may be low.
- A tube with an unusually high level of internal gas may exhibit a visible blue glow when plate voltage is applied.
- When a tetrode or pentode is used, the screen grid voltage is usually about one-half the plate voltage.
- The "'866 "'is a filament preheated for at least 30 seconds before applying the plate voltage.
- This is grounded at the operating frequency, but carries a DC potential, normally 10 to 50 % of the plate voltage.
- Tube caps were also used for the plate ( anode ) connection, particularly in transmitting tubes and tubes using a very high plate voltage.
- Because plate voltages can be as high as 300DC, multiple B batteries may be connected together in series to additively provide the required operating voltages.
- Modern circuits using semiconductors, or high-gain vacuum tubes with plate voltage as low as 12V, typically operate at milliwatt levels one thousand times lower.
- De Forest's initial Audions did not have a high vacuum and developed a blue glow at modest plate voltages; De Forest improved the vacuum for Federal Telegraph.
- Vacuum tube coils typically operate with plate voltages between 1500 and 6000 volts, while most spark gap coils operate with primary voltages of 6, 000 to 25, 000 volts.
- In normal operation the screen grid is connected to a positive DC voltage slightly less than the plate voltage, and bypassed to the cathode with a capacitor, so it was at AC ground.
- The radio used a plate voltage of 160 to 170 volts directly from the AC power line; the rectifier, while not needed with a strictly DC supply, did not cause a problem.
- This causes a downward " kink " in the plate current vs . plate voltage curve " ( graph below, grey region ) " when the screen grid is biased at a higher voltage than the plate, as described below.
- Power is necessary for establishing the capacitor plate voltage, and is also needed to power the microphone electronics ( impedance conversion in the case of electret and DC-polarized microphones, demodulation or detection in the case of RF / HF microphones ).
- Other reasons for using a top cap include improving stability by reducing grid-to-anode capacitance, improved high-frequency performance, keeping a very high plate voltage away from lower voltages, and accommodating one more electrode than allowed by the base.
- The 807 is not a good choice of tube for typical Ultra-Linear amplifier circuits, as the maximum screen voltage at 300 V is less than half the maximum plate voltage of 750 V . A possible solution is to use an output transformer with a separate ultralinear screen winding, such as the Acrosound TO-350.
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