France JP200 fever bile preamp, stone rectification, bile voltage

#34;DROPSHIPPER amp; RESELLER WELLCOME #34; NIKMATI KUALITAS TERBAIK DENGAN HARGA BERSAHABAT HANYA DI ALANOFASHION! Garansi Sampai 1 Tahun is_customized : Yes Coil Number : Autotransformer Usage : AUDIO Phase : Single Coil Structure : Toroidal [Circuit Description] This time I recommend a Jadis JP-200 tube preamplifier with the most balanced sound and the most musical appeal. First, the introduction of circuit principle The left and right channels of the circuit diagram are completely phased. The original l2AX7 is an excellent small signal audio voltage amplifier tube with high μ value and high internal resistance. Originally used for MM head enlargement and input level amplification, its tone is beautiful, the gallbladder is rich, and the domestic model is 6N4. The values ​​of all components in the release circuit are faithful to the original, two-stage common cathode amplification in full parallel, the additional cathode follower is the output, and a large loop negative feedback is applied. The gain of the entire preamplifier is determined to be about 11 by applying a negative feedback of a large depth loop. The preamplifier has high requirements on the power supply, the power transformer has insufficient capacity or the power supply is not well filtered, and it is easy to sense the hum and his noise. Even if it is only a little bit, after several tens of times, after hundreds of times of amplification of the power amplifier of the latter stage, the sound quality will be seriously affected. The power supply part is slightly modified on the basis of the original circuit. The high voltage part adopts the field effect fast diode rectification, the sound quality is very close to the bile rectification effect, the resistance and capacitance 丌 shape filtering, and the electron tube voltage regulation power supply. The reference voltage is provided by a crystal