Switching a BJT for a JFET

[bluefoxicy]

so this diagram...



Source: http://fuzzcentral.ssguitar.com/axiswah.php

BJTs. I am wondering about the possibility and tone difference in making these JFETs; BJTs have a lower input resistance, but effectively the two devices do the same thing right? My understanding is FETs have better tonal quality than BJTs, and the original buffer circuit uses a BJT anyway (the output buffer given there uses a JFET):



Source: http://www.freeinfosociety.com/elect...iew.php?id=350


Source: http://www.geocities.com/j4_student/schematics.htm

(This is silly, a 0R resistor is just a resistor package with a wire straight through it... makes no difference)

My research on the topic is limited... I found a nice write-up that helped get me some info but....

[Enzo]

Nothing silly about it. A zero ohm resistor is easier for a pick and place machine to insert in the circuit board than a wire. Also, it keeps a space there in case they want to add a resistor or other component in some case.

[bluefoxicy]

Nothing silly about it. A zero ohm resistor is easier for a pick and place machine to insert in the circuit board than a wire. Also, it keeps a space there in case they want to add a resistor or other component in some case.

Yes, but replacing it with a jumper (as recommended) is silly.

[Enzo]

Yes, that seems pointless, I thought it was the zero ohm resistor throwing you.

[Arthur Dent]

I believe he meant that for people who are building them and may have never seen a 0 ohm "resistor".

[GibsonLover]

When I purchased 0-ohm resistors (for pick-and-place) I had to chuckle at the +/-5%
tolerance on the part. Sure enough, our procurement documents copied the same info...

[Don Moose]

I worked, briefly, as a EE at IBM. They didn't (1996) have zero-ohm resistors - they had 0.01-ohm 1% and 5% resistors. I bothered to ask and was told, rather archly, that zero-ohm resistors were impossible - they did not exist - and it made no sense to call a non-zero-ohm part zero ohms because that would just confuse people.

Like I said, I wasn't there long.

[Enzo]

Did they then label ALL their wires as various fractional ohm resistors?