Split 300B pushes 845 single-ended tube amplifier

Condition:New
Type:Logic ICs
Known as the King of Bile 845 direct heating transistor, due to its good linearity, low internal resistance and high power, it dominates all HI-FI tube amplifiers! However, because the negative pressure of the gate is relatively deep -140V, the general resistance-capacitance drive of the electron tube cannot be fed unless it is driven by the booster. However, it is necessary to know that a booster with good performance indicators is more difficult to manufacture than the entire 845 tube amplifier. The current is very small, and more importantly, there is no load at the output, that is, because the 845 has no gate current, it is a voltage-driven type, which results in extremely poor initial coupling, which directly affects the sound level of the entire machine!

The 20W+20W 845 single-ended amplifier split power amplifier introduced by our store uses the classic 6m4 (K: 170) + 300B cathode output to drive the 100V 100MA 845. Regardless of the output voltage amplitude or distortion angle, it can drive 20W. 845 amplifier! The split machine uses left and right channels independent! A total of 10 cows are involved in the work, 4 chokes, 4 high-voltage and low-voltage cows, and 2 output cows. The reason why such a complicated production process is adopted is that the sound field positioning of the split machine is better than that of the combined machine, because the ground wire is independent ! The high-voltage and low-voltage independent power supply is to separate the filament windings that are not related to sound, so that the high-voltage coils have greater magnetic energy, and the high-voltage windings related to sound have lower internal resistance and greater dynamics, but The price paid is increased costs. . . The sound performance of the 845 single-ended split machine designed by our store: dark background, fine sound quality, and good air. The price is the price of the left and right sound channel finished machine!



Machine parameters:

Power consumption: 250w+250w

Power: 20W+20w

Bandwidth: 30HZ...25KHZ (-3DB)

Weight: 22KG+22KG

Dimensions: width: 450* height: 240* depth: 280 (mm)


Tube parameters:

6*4(2pcs Soviet Union)

300B(2pcs PSVANE)

845(2pcs PSVANE)