|Buffer - Discrete|
You can build this with either a JFET (recommended) or a standard NPN transistor. This project uses the CB1 circuit board layout for either JFET or NPN transistor buffer. This project is taken directly from the Basic Buffers article on the AMZ site.
Would you like a Ready to Solder Circuit Board for this project?
What does a Buffer do?
Our definition of signal chain here is: everything between your guitar and amplifier input, including cables. As your signal chain gets more complex (adding more stompboxes and patch cables) you may start to notice a loss of treble in your guitar sound. Your sound may sound much more dull than it does when you plug guitar straight into the amp with a short cable. Check out this Information about Impedance and Buffers for some information on why this happens.
This Pete Cornish Case against True Bypass Article may do something to explain why a little buffer stompbox may be something useful to you. I believe there is "A Case For True Bypass" as well, but the article might give you a good idea of what a buffer can do in your signal chain.
Please note that almost all Boss, some Ibanez and some other commercial pedals use a non-bypassed buffer. This means if you have a Boss pedal in your signal chain, then you probably already have a buffer in signal path even when the pedal is in bypass mode.