Fu19 Class A amplifier circuit driven by 6N2 is adopted, and the output power is 4.8w+4.8w The impedance required for driving the sound box is 4-8 ohms, and the sensitivity is above 89db. Due to the advantages of strong overload capacity, the actual undistorted output power of electron tube is equivalent to that of transistor power amplifier with 50w+50w! Push a pair of bookcases under 80W, and a room of 20 square meters is loud enough.
External dimensions of the whole machine: Width 190MM (the widest dimension of the panel) Height 180MM (height from base to the highest tube) 315mm deep (depth from volume knob to terminal)
The measured thickness of the panel is 7.8MM, the upper and lower plates are 3MM, and the back plate is 3 mm
Parameters of gallbladder machine:
Output power: 4.8W+4.8W
Frequency response: 20Hz--20kHz.
Input impedance: 100KQ
Output impedance: 4 ohms, 8 ohms
Signal to noise ratio: 90db
Input sensitivity: 500mV---2V.
Tube for power amplifier:
Post-stage power tube: FU19 (Beijing, Beiguang Random)
Preamplifier tube: 6N2 (Shuguang, Beijing)
Cat's Eye Electron Tube: 6E2 (Beijing)
Specification of gallbladder transformer Power transformer 85W
Iron core E1760.5mm brand-new annealed silicon steel sheet skeleton 25*50 iron core stack thickness 50mm.
Primary input voltage; 0-220V
Output voltage; 0-210V-250V 150ma 3. 15V—0—3. 15V 2A; 0—6. 3V 2A; 0—6. 3V 2A
5W single-ended output cattle
Core EI57
Skeleton 19X26 (tongue width 19, stack thickness 26)
Primary 5K, DC resistance -346 ohm
winding method; 3+2 heating stage winding secondary 0-4q-8q
Color classificationFU19 finished product+Bluetooth module package E
Shielding mode; Electrophoresis plating black iron shell full shielding type
