About to ask a question which will show my ignorance of field interference...
My understanding on gain being the ratio of r3/r1 would it be possible to replace r3/r4 with a small switched resistor circuit, so as to provide for two different gains? or maybe three...
I understand the resistance part of it, but I am wondering if this would introduce some weird em field that I would never understand...My plan would be to have the resistors up off the front panel switch, separate from the circuit board.
Thanks!
My understanding on gain being the ratio of r3/r1 would it be possible to replace r3/r4 with a small switched resistor circuit, so as to provide for two different gains? or maybe three...
I understand the resistance part of it, but I am wondering if this would introduce some weird em field that I would never understand...My plan would be to have the resistors up off the front panel switch, separate from the circuit board.
Thanks!
R3/R1 and R4/R2 set the gain. R1 and R2 stay at 10k and R3 and R4 (R3=R4) are adjusted to adjust the gain.
R3 and R4 off-board should not be a problem. However to minimize any negative effects of the connecting wires, tightly twist the wires that connect each resistor back to the PCB.
R3 and R4 off-board should not be a problem. However to minimize any negative effects of the connecting wires, tightly twist the wires that connect each resistor back to the PCB.
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