Pure Class A small amplifier

The power amplifier exciter ensures that the final power amplifier can obtain sufficient driving voltage, so as to produce a larger power output. 6
    "Small amplifier " material selection should be excellent in order to obtain the ideal ¨gall music' 6 RPl chooses Nissan sealed WH161- 1BP potentiometer
; the resistors all use metal film series, and the power capacity must be sufficient. If conditions permit, the early production of "Dahongpao"
  resistors will be better. The filter capacitors use "RUBYCON'' electrolytic capacitors, or
  the domestic CD11 series 9
  CT1 ceramic capacitors can be used as high-frequency filter capacitors in parallel with filter electrolytic capacitors. It is best to use
ISClJEN or domestic XIND AK-CB13 capacitors for inter-stage coupling . VE1 is 6N4, and VE2
uses side-heated common cathode double three-pole power amplifier tubes 6N7P+ 6h14.1: and 6N7P.
The pin arrangement is shown in Figure 1-23. . The characteristic parameters of VE1 and VE2
are listed in Table 1-5. 6. The power transformer TB is an old-style tube radio and
the output transformer TO is homemade. The iron core is made of cold-rolled silicon steel sheet, with a thickness of >8000
Gauss . The cross-sectional area is S:(.≥ 3c hatch, the primary winding is wound in layers and segments using 4N oxygen-free copper (OFC) wire, where ⅣI, N" in the formula "
    IVI
, N" are the primary and secondary turns of TO respectively, the total is the final output resistance, and RL is the speaker
impedance. For detailed winding methods, please refer to the relevant information