An inexpensive courage ----- Cheap Vacuum Tube Amplifier

Cheap timing, Cheap Vacuum Tube amplifier Keywords: an inexpensive courage A cheap bile Originally used in the propylene high-frequency amplifier 6p13p of the tube TV line output stage, because it is poor linear when the high power is used, so few use it as a daring power, so the 6P13P on the market is extremely cheap. In fact, the 6P13P is used in the anode low voltage, large current, small power, linear or good (output 5.6W power distortion is not 3%). As shown, the inexpensive medium μ voltage amplifier 6n1 (1/2) is made of single-stage self-bias voltage amplification, gain k = 20, when the 0.6V effective voltage is input, the output 12V signal voltage makes the post-rated output power 11W, fully meet the connection with the various sound sources today. The power amplifier is used in two 6p13p and connected to the single-ended power output, and the load impedance is 1300Ω. Since the distortion of the whole machine is not very large, the negative feedback loop is saved to show wide sound field. In order to save costs, use primary 220V, secondary 16V power 100VA high quality power transformers instead of expensive output transformers. Because the matching of the in-line output impedance is lower than the output transformer ratio, the lower the ratio, the smaller the negative impact of the transformer on the sound quality. The E1 silicon steel sheet is inserted into "Bush" inserted by a cross pair, and the push is 0.5mm thick paper, which fully meets the demand of the wide frequency. In the whole machine welding, the 6P13P filament is 6.3V AC power supply, and the 6N1 filament is DC power supply, and the stabilizing block 7806 can save the expansion tube 2n3055 to simplify the circuit. After the whole machine is completed, the power is applied to detect the voltage, if everything is normal, the inkiring can be put into use.

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