what's the best buffer?

[ninjadave7]

i built the amz jfet buffer and it sounds good but there is a definite sizzle in the signal at the end of notes that doesn't exist when it's not inline.  fyi, i play a les paul classic into a buffered bypass strip into a goodsell super 17.   i know this is a fairly basic jfet buffer (but a good one) but what other designs or augmentations to the amz are there that might be cleaner?  i tried the opamp amz but it seemed a little dull compared to the jfet.  is the VS puretone buffer or the lovepedal buffer much different?

[Auke Haarsma]

A bit off topic, but..: so you are running a buffer into another buffer. Why?

[solderman]

i built the amz jfet buffer and it sounds good but there is a definite sizzle in the signal at the end of notes that doesn't exist when it's not inline.  fyi, i play a les paul classic into a buffered bypass strip into a goodsell super 17.   i know this is a fairly basic jfet buffer (but a good one) but what other designs or augmentations to the amz are there that might be cleaner?  i tried the opamp amz but it seemed a little dull compared to the jfet.  is the VS puretone buffer or the lovepedal buffer much different?

I inserted the Op-amp buffer from http://www.muzique.com/lab/buffers.htm in my 42 box
and I'm not experiencing it as dull. rather the opposite. very linar and not interfering at all with the tonal source. I used a 100nF poly in cap and a 10uF E-lyte out cap.
 

[R.G.]

Best buffer?

In general, a JFET or CMOS input opamp running from +/-15V supplies. An exception is the NE5532 running from +/-15V.

Opamp = clean as long as (a) it's a modern high bandwidth opamp, not an old 741 style and (b) you never, ever let any signal push it into power supply clipping, even momentarily. This gives a degree of transparency and clean signal drive that is simply impossible for a one- or two-transistor device to do.

[ninjadave7]

A bit off topic, but..: so you are running a buffer into another buffer. Why?

sorry if i worded that weird, the buffer in the bypass loop is the buffer i built.

I inserted the Op-amp buffer from http://www.muzique.com/lab/buffers.htm in my 42 box
and I'm not experiencing it as dull. rather the opposite. very linar and not interfering at all with the tonal source. I used a 100nF poly in cap and a 10uF E-lyte out cap.

maybe it would make a difference if i used higher quality parts then?

Best buffer?

In general, a JFET or CMOS input opamp running from +/-15V supplies. An exception is the NE5532 running from +/-15V.

Opamp = clean as long as (a) it's a modern high bandwidth opamp, not an old 741 style and (b) you never, ever let any signal push it into power supply clipping, even momentarily. This gives a degree of transparency and clean signal drive that is simply impossible for a one- or two-transistor device to do.

i was powering the opamp buffer from a voodoo labs pp2+, those are just 9v outputs unless you switch them, in which case i think they're 12, would it help to power it off the 12v output or is there another way to get around 15v?  would that be beneficial to the orman design?

[solderman]

maybe it would make a difference if i used higher quality parts then?

I used  half of a lm358 only cause I had a bunch in stock the rest is standard components nothing special.