Shorting - to ground at the end of the cable (just before the switch)? Advantageous contra jumpering at ACA outs?
fragletrollet said:So if I am right, this would be a differential amplifier setup for unity gain because R1 = R2 = R3 = R4 (I am going by the designations in the article as explained here:
http://www.electronics-tutorials.ws/opamp/opamp_5.html
r3/r4 designations are reversed in the DR schem)
So I have a couple of questions:
1) According to the article you can change the amplifiers gain by adding resistors in paralell to r1 and r3.
What resistor values can I use for setting up a channel for say 6 or 12 db gain?
2) If the input is setup for unity gain, will the 1646 actually add 6db`s of gain to the direct output? Why would not a 1640 be used instead?
fragletrollet said:Vout=2000/2000*(1-(-1))
Vout=2v...?
Using +4dbu input signal:
Vout=2000/2000*(1.78-(-1.78))
Vout=3,56V...?
As you mention a gain of 6db is a factor of (almost) 2. So my Vout would be almost the double?
Vout=3,56*1,995262 = 7,1
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