Double differential push biliary machine with constant current source ----- Vacuum Tube Power Amplifier

Double differential push biliary machine with constant current source, Vacuum Tube Power Amplifier Keywords: double differential pushing machine with constant current source This as a cathode load is used as a cathode load of the bile duct as a cathode load of the bile duct. The advantage is that the circuit structure is simple, the stability is good, and the constant flow tube is not hot, the noise is extremely low, and the latest improvement circuit represents the differential circuit is also the easiest way. The front level of this circuit has been restructed into a constant current source working mode, and the sound quality is beautiful. Individual power transformers individually, 6J1 pre-stage use of a secondary tap of power transformers, the AC voltage value is 125V-0-125V: 12AU7 and 12AT7 power transformer secondary is 250V-0-250V: 6N13 power supply The transformer secondary is 125V-0-125V: Each power transformer uses the blocking ring to add high pressure capacitor filter mode, and the circuit diagram is omitted. The n-channel field tube used in this machine is RFP40N10. This tube is just a letter of hand, and it is not only deliberately selected, and most N-channel field tubes can be used for this circuit. The rapid detection method of the N-tube is to put the field tube facade, the pin is toward himself, the pointer is used to set the RX10K gear, and the pin is g, d, s, respectively, respectively. Among them, the D pole is connected to the heat sink, and the red table pen is directly D pole, the black table pen is connected to the s pole. At this time, the pencil is deflected, keep the can't move, simultaneously short the D pole S poles, and the pencil is immediately returned, when used The finger is separated for the G pole needle soon deflected more than half the dial, and the finger leaves the G pointer will not return to the original, only simultaneously shorts D, the S extreme table needle will return. This shows that the tube is turned on, closed, and enlarged. The circuit is briefly described as follows: The electron pipe 6j1 and 12au7 form a two pole amplifier, and the high frequency response is excellent. The inverted level and power stage use a constant current source difference, stability, good sound quality. Due to the use of push-pull circuits, the occasional harmonics cancel each other, the distortion is low, and the sound quality is clear and transparent. I have never believe that the occasional harmonic distortion is the reason, and the distortion sound does not make people feel comfortable. This article is attached to a detailed circuit diagram, so this is the throwing brick, the better the chances.

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