Hi all,
As I understand the guitar cable line is like a capacitor, as long as the cable is, the high cable capacitance is, that's why long cable results high freq loss (capacitor in parallel to signal), solution for this is the buffer.
Buffer has low output resistance, how does it prevent the high freq loss?
What is the considerations and triad off for selecting buffer's input & output resistor ?
As I understand the guitar cable line is like a capacitor, as long as the cable is, the high cable capacitance is, that's why long cable results high freq loss (capacitor in parallel to signal), solution for this is the buffer.
Buffer has low output resistance, how does it prevent the high freq loss?
What is the considerations and triad off for selecting buffer's input & output resistor ?
Buffer has low output resistance, how does it prevent the high freq loss?
If the buffer is "before" the cable
(that is between the pickup+pots and the cable)
then the buffer output resistance (which is low) defines the RC
instead of the pickup + potentiometers output R.
The corner frequency of the filter is 1 / (2 * pi * RC)
so the smaller the RC, the further up your corner frequency.
The buffer also has a high input resistance, thereby "isolating" the pickup.
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