Pure-sounding tube amplifier

The high-voltage power supply of the electronic tube has small fluctuations in static state and full load, so the capacity of the filter capacitor is sufficient for tens of microfarads. In order to facilitate the installation of this
machine, the electrolytic capacitor adopts composite CDE type, and the aluminum casing is a common negative electrode. During installation, use thick bare copper wire
to wind tightly around the casing and ground it at a nearby place.
    The high-voltage rectifier tube and the light high-voltage power supply of the front stage should be supported by a wiring frame. The bracket can be made by making 6 front-stage sub-high voltage
power supplies. Since the current is small, a CRC filter circuit is used.
    (4) When installing components at all levels and
    resistors and capacitors at all levels, try to ground them at one point to prevent cross interference.
    To prevent noise interference, the resistors of this machine are all made of metal film resistors.
    (5) Electron tube grid anti-interference The gate impedance of
    the electron tube is high. In order to prevent interference from AC, stray wires, etc., care must be taken not to
be in close contact with the components of the high-voltage circuit. For this reason, the decoupling resistor of the high-voltage circuit should also be mounted on a self-made bracket so that it can be mounted overhead.
    (6) The input stage anti-interference
    input tube gate has a high sensitivity and is extremely susceptible to interference from AC stray signals. Therefore, the input tube gate Since the volume control
potentiometer has a long lead, it must use a metal shielded wire. The outer layer will be the ground of the braided mesh and should be arranged in the transmission pipe.