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 Bispa SP-TUBEAMP-KIT01 / SINK



"BSP-TUBEAMP-KIT01 / SINK" is the headphone amplifier of hybrid configuration of the vacuum tube and the op amp. Towards the power supply has been designed to operate with four AA rechargeable batteries. One of the features of SINK, we have become a rare OCL output system in the vacuum tube of this type. Also, because it was considered to provide direct the clean power to the operational amplifier, the operational amplifier has many varieties of current supply quantity has adopted a variety of low voltage op amp. This KIT is, "vacuum tube: 1AD4 / operational amplifier: OPA2356" has been adopted.
Power supply circuit, has adopted a high-efficiency DC-DC converter IC less noise. Sufficient voltage and heater current is making it to the specification, such as can be secured to operate the vacuum tube.
The condenser that has been used the optimal capacitor and resistor in each "Power and audio signal".
 
Specification
Tube: Tung-Sol 1AD4 (Made in USA) x 2
Board size: 72mm × 105mm
Power supply: 4 x AA rechargeable battery
Case Size: 132 x 72 x 25 (mm)
Input Format: Stereo SE input
Output format: stereo SE output
Vacuum tube: Triode or 5 "current consumption by the heater voltage is 1.25V (Typ) the following (regular current value) 100mAh" in triode are available vacuum tube.
Input impedance: about 10KΩ ~ (input impedance of the circuit)
Fit headphone impedance: 11Ω ~ 100Ω