audioguru, I spend an average of 1h a day on the net but often in 15-20 min sessions. Do you mean that the blue stuff is no longer manufactured? :o I use it all the time and I have some stock left but not much. It
Xenbius, Congratulations, Now everything is perfect. Can I ask you how the PSU performs, what is the maximum current @ 30Volts without voltagedrop? Ante ::)
Bob, I will try my best: The voltage drop over R2-1 (U=R*I) is amplified in U1 by a factor of 10. This factor is set by R1 and R2. The maximum current = 6A the resistance of R2-1 is 0.05R which gives 0.05 * 6 = 0.3 Volts. The output of U1 is 0.3 * 10 = 3 Volts. The reason for R2-2 is to raise the potential above ground to make the op-amp (U1) work better. Thus the output varies from 0 to 3Volts linear with the current 0
yourwinns, The BFR90 can be replaced with BFG90, BFQ28, BFR14, BFR49. The MC3403 with LM324 And the NTE112 is a TV UHF Mixer diode can be replaced with BA481 Ante ::)