(3456 7789) Diodes and triodes are known to everyone and are common, but tetrodes, pentodes, six-tubes, and even quips are mentioned in the book. What do these do? The following pictures are photos of some tetrode, pentode, six-tube, or even quintupoles. Everyone has a look. There is no need to investigate. After all, these devices are just bizarre names, the principles are not complicated, and they are old. There are not many places to use! Let's watch a lively right! Key explanation Transistors have only diodes and transistors. Electron tubes include diodes, transistors, tetrodes, and pentodes, and there are two types of tetrodes. One type is a negative-gate structure, in which a negative potential is added between the gate and the cathode to increase the low-voltage characteristics. The earliest mobile devices were used somewhat, and this configuration was used in static measurements. The second type is a screen grid configuration, in which the cross-channel capacitance of the tube is smaller than that of a triode and the amplification factor is larger than that of a triode. Used for high frequency, audio amplification, oscillation, etc. It was later replaced by a pentode. The pentode adds a suppression gate between the screen and the screen of the tetrode. The capacitance across the circuit is smaller and the magnification is greater. Widely used for high frequency, low frequency power amplification. The beam tetrode is similar to a pentode, except that the suppression grid is replaced by a beam screen. Suitable for power amplification. Six-pole, seven-pole, and octupoles all have two control gates for superheterodyne conversion. The quintupole is developed by Philips and used to be a frequency discriminator. There is no universality. Transistor Pentode Hexapole Seven tubes Euroblock, short for "European-style terminal block"; is a combination of a low-voltage disconnect (or pluggable) connector and terminal block commonly used for microphones and line-level audio signals , and for control signals such as RS-232 or RS-485. It is also known as the Phoenix connector and comes from a German Phoenix Electric Company, which was established in 1981 in Harrisburg, Pennsylvania, USA. Also known as "Plug-in Terminal Blocks" or "Two-Piece Terminal Blocks". Eurostyle Terminal Blocks,Eurostyle Terminal Blocks High Temperature,Eurostyle Terminal Blocks Kit,Eurostyle Terminal Blocks Heat Resistant Sichuan Xinlian electronic science and technology Company , https://www.sztmlchs.com
