1pair Adjustable YJ-E405 Gold-sealed Tube Power Amplifier Board Class A
parameter:
1. Power supply: DC+-(35V-55V) +-45V recommended
Note: Each board is powered by AC12V power supply independently.
2. Power: 200 W (total harmonic distortion THD+N<0.1%), DC+-45V, 4Ω
3. Class A 60W, measured under 4 ohm load
4. Speaker impedance: 4-8Ω
5. Board size: 105*236mm
6. First adjust the differential input stage current to 2MA: adjust the VR1 (500R) adjustable resistor so that the voltage at the two points C and D is 1.5-2V (that is, the voltage across the R9 (1K) resistor); at this time, the input differential current is 1.5- 2MA, this value is of sound quality
7. The quiescent current of the large tube is 100MA: Adjust the adjustable resistor VR2 (1K) so that the voltage at A and B is 22MV. At this time, the quiescent current I=22MV/0.22R is 100MA; if the customer’s heat sink is large enough, it can make Increase quiescent current, generally 100MA-300MA sound effect
2. The interstage coupling capacitor uses WIMA top capacitor 1UF, the sound is natural, and the sound field is wide.
3. The resistor uses five-ring metal resistors, and the main circuit uses a five-ring metal film resistor with an accuracy of ±1% to ensure a good signal-to-noise ratio.
4.PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and tin-spraying process to ensure good passing performance of large and small currents.
5. The biggest feature of this board is the use of the current advanced C1237 BTL speaker protection circuit, which effectively eliminates the impact sound and DC output protection function of the open and shutdown, making your speaker safer.
6. The layout of the entire circuit board is quite rigorous and reasonable, and the overall PCB trace adopts a grounding method. The power amplifier board works stably and reliably, and the output power is large; the sound is beautiful and round, and the sound field is wide. The three-dimensional sense is strong, the low frequency is solid and solid, the signal-to-noise ratio is quite excellent, the dynamic range is wide, the details are clear, the transient response is excellent, and all kinds of music are played comfortably. It has a very good performance in the family's playback environment.
1. Power supply: DC+-(35V-55V) +-45V recommended
Note: Each board is powered by AC12V power supply independently.
2. Power: 200 W (total harmonic distortion THD+N<0.1%), DC+-45V, 4Ω
3. Class A 60W, measured under 4 ohm load
4. Speaker impedance: 4-8Ω
5. Board size: 105*236mm
6. First adjust the differential input stage current to 2MA: adjust the VR1 (500R) adjustable resistor so that the voltage at the two points C and D is 1.5-2V (that is, the voltage across the R9 (1K) resistor); at this time, the input differential current is 1.5- 2MA, this value is of sound quality
7. The quiescent current of the large tube is 100MA: Adjust the adjustable resistor VR2 (1K) so that the voltage at A and B is 22MV. At this time, the quiescent current I=22MV/0.22R is 100MA; if the customer’s heat sink is large enough, it can make Increase quiescent current, generally 100MA-300MA sound effect
Introduction:
2. The interstage coupling capacitor uses WIMA top capacitor 1UF, the sound is natural, and the sound field is wide.
3. The resistor uses five-ring metal resistors, and the main circuit uses a five-ring metal film resistor with an accuracy of ±1% to ensure a good signal-to-noise ratio.
4.PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and tin-spraying process to ensure good passing performance of large and small currents.
5. The biggest feature of this board is the use of the current advanced C1237 BTL speaker protection circuit, which effectively eliminates the impact sound and DC output protection function of the open and shutdown, making your speaker safer.
6. The layout of the entire circuit board is quite rigorous and reasonable, and the overall PCB trace adopts a grounding method. The power amplifier board works stably and reliably, and the output power is large; the sound is beautiful and round, and the sound field is wide. The three-dimensional sense is strong, the low frequency is solid and solid, the signal-to-noise ratio is quite excellent, the dynamic range is wide, the details are clear, the transient response is excellent, and all kinds of music are played comfortably. It has a very good performance in the family's playback environment.
Package:
2pcs Adjustable YJ-E405 Gold-sealed Tube Power Amplifier Board Class APayment Details
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receiving the order.Products should be returned in original condition.
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