Product presentation:
Circuit reference line crew from JC-2, fully symmetrical FET input, voltage level third edition CPI adjustment 20MA-25MA output, sound alcohol Naiting, delicate
The best power supply using the CPI, the output current 100MA above .
Materials using the best 718 series resistance, while the same level of accuracy and DALE better. Pins are all stout copper pin, the main capacitor for high-end 048 Series BC capacitance retreat even brown god Generation 2.
Circuit delicate natural timbre, Bach, not what OPA627 637 can be compared, balance is very good, very close to the tube amp style, high cost, because it is a full-flat symmetrical structure, the midpoint of the very stable without the need for input and output capacitance.
Technical parameters:
PCB size: 113MM X 105MM
Supply voltage: If you only AC15V transformer, then adjust the voltage on the +-15V as well, if the transformer input AC18V, is adjusted to + - 18V as well
The input stage: 2MA
Voltage amplifier stage: 20-25MA
Plates on the board CF1 CF2 do not have to install
Debugging is very simple:
1 Adjust the power part of the trimming resistor 2K, the power supply voltage output + - 15V ---- 20V down.
2 Adjust the 1K ohm resistor trimming to make 1. 5K ohm voltage of 2.5 ---- 3V (not to exceed 3V, and fever higher than the midpoint, the board has a label .
3 Adjust the preamp section 500 ohm resistor trimming the output close to 0MV.