Too Much Awesome (Boneyard with JFET input buffer)

[mshuptar]

That looks super cool! Question: Did you use waterslide decals for the labeling?

[mgwhit]

Thank you!  And, yes, almost all of my builds use powdercoated enclosures (typically from Pedal Parts Plus, but some from Mammoth) with a laser printer clear waterslide decal and several layers of clear enamel.  I've been sticking to black lately (mainly because my printer is B&W), but I'm planning a series of color ones this Fall.

[Hangingmonkey]

Thanks for posting up the report.  I had similar whining issues with the boneyard so I left it up in the shelf till a solution came up for it.  I stuck a boss CE5 in front of it yesterday after reading this thread and problem solved. 

Any change you could post up a diagram or pics of what you did in your buffer?

Thanks and great work!

[mgwhit]

Any change you could post up a diagram or pics of what you did in your buffer?

As per my previous post, it's just the GGG JFET Buffer with a couple of changed cap values. Google "vero JFET buffer" and you'll find better layouts than mine.  I just used the Radio Shack IC board because that's what I had laying around.

[pickdropper]

Any change you could post up a diagram or pics of what you did in your buffer?

As per my previous post, it's just the GGG JFET Buffer with a couple of changed cap values. Google "vero JFET buffer" and you'll find better layouts than mine.  I just used the Radio Shack IC board because that's what I had laying around.

Just an  FYI, I have a Boneyard in process and the only thing that cut the whine was putting a buffer in front of it.

[Beedoola]

Hey all and mgwhit.

I used the C5/R5 method to fix my BY whine issue - and it worked, however I'm experience this weird presence - most notably on the High Gain channel that sounds like the pedal is almost gonna go into oscillation. Like if I play a chord and then choke it, there is this underlying presence - like a trebly/wah sound. Its hard to explain.. Has anyone experienced/heard any thing like that? I'll have to keep listening to it to better describe it.

[mgwhit]

I used the C5/R5 method to fix my BY whine issue - and it worked, however I'm experience this weird presence - most notably on the High Gain channel that sounds like the pedal is almost gonna go into oscillation. Like if I play a chord and then choke it, there is this underlying presence - like a trebly/wah sound. Its hard to explain.. Has anyone experienced/heard any thing like that? I'll have to keep listening to it to better describe it.

I don't think that the C5/R5 method truly fixes the issue enough.  I'm guessing you're still getting some oscillation, but it's just not getting totally out of control.  What values did you use?

[pickdropper]

I used the C5/R5 method to fix my BY whine issue - and it worked, however I'm experience this weird presence - most notably on the High Gain channel that sounds like the pedal is almost gonna go into oscillation. Like if I play a chord and then choke it, there is this underlying presence - like a trebly/wah sound. Its hard to explain.. Has anyone experienced/heard any thing like that? I'll have to keep listening to it to better describe it.

I don't think that the C5/R5 method truly fixes the issue enough.  I'm guessing you're still getting some oscillation, but it's just not getting totally out of control.  What values did you use?

This.  The C5/R5 method made no difference for me.  Putting a buffer is the only thing that worked.  I first confirmed by putting a buffered Klon pedal in front of it, then wired a direct one like you suggested.

[greyscales]

Hey all and mgwhit.

I used the C5/R5 method to fix my BY whine issue - and it worked, however I'm experience this weird presence - most notably on the High Gain channel that sounds like the pedal is almost gonna go into oscillation. Like if I play a chord and then choke it, there is this underlying presence - like a trebly/wah sound. Its hard to explain.. Has anyone experienced/heard any thing like that? I'll have to keep listening to it to better describe it.

I've gotten that sort of sound on the high gain. The only way I could get rid of it was to put a buffer before it. I used a Klon buffer and it works like a charm now. Worked on two of them.

[Beedoola]

ahh yes. I had a Klone but sold it to a friend. I just put my Boss RV-5 first i my chain and the sound went away. I was also getting some light feedback as well on the High Gain side. I may have to build a Kingslayer for a bummer heh

[Beedoola]

MG - did you put the buffer before the circuit In or the Input Jack In? - in the latter case, with the buffer always being in the signal path. I built a Klon buffer and it fixed the feedback/mild oscillation noise but now I'm getting switch pop for the Boneyard and all the pedals after it.

[mgwhit]

I put mine between the foot switch and the Bone yard circuit, so that it is only in the chain when the effect is activated.

[greyscales]

I put mine in front of the switch (always on) and it hasn't given me any problems, so you might want to check something.

[Beedoola]

I put mine between the foot switch and the Bone yard circuit, so that it is only in the chain when the effect is activated.

cool, I rewired it to this configuration and the switch pop went away. Thank you.

[Strider0007]

Hello guys,

I posted a while back I saying I was going to look into it and I just got my pedal back from my friend so I apologize for the delay and I just started looking into it earlier today.
So far it looks to be crosstalk from the high gain section being routed too close to the input (R4/R1) and that whole trace passes below all the input components all the way to pin1 of the IC(LF347). So I took out all input components(RPD,R1,R2,C1) except C2 and wired the input directly to that and it took the whine away until I set the vol to like 2-3 o'clock then it started to come back again.
Also looks like it needs shielded input wire.
So next I placed R1 soldered to one side of C2 and it still kills the whine but only until the vol reaches 2-3 o'clock position.
I'm going to experiment a lil more later and post my findings. If it's not getting anywhere after that I'll just etch my own PCB to see if that solves it. I would like to build this without the extra buffer circuit but it might not be worth the effort considering how simple it is to just add a buffer in front of it as it has been mentioned here. I'm just determined to find out why it's oscillating I guess...lol