Anybody have a schematic the JG Tiger Unity Gain Buffer

[bdhact1]

Here is a better picture. this one is .JPG instead of .BMP

[J M Fahey]

Well, if you like its sound, I have nothing to object.
Anyway I think I must warn you that that's not a unity gain buffer, but something that introduces a -10dB loss, besides not having the best configuration to avoid hiss.

[bdhact1]

The techs at the RUKIND music forums do mention a slight volume drop, or being slightly less than unity. This condition may be correct for this buffer. I'm still testing it through the effects loop built into the guitar to make sure the volume drop isn't too detrimantal. The hiss isn't as bad with other opamps, but this model opamp is the authentic one.

[bdhact1]

I have yet another configuration of the components that sound more authentic then previous configurations. There are 2 resistors that seems to make no sense in their placement, but the sound is right. somewhat baffling.

[J M Fahey]

Hi bdhact.
Now we are *very* close:
Everything is the same, with a very slight change :
1) un-join C1/R1
2) join right pin of C1 straight to IC pin3
3) Join left pin of R1 to union of R2/R3
That configuration works as intended.
This gives correct bias to IC1, the guitar mics sees an input impedance of over 1M (good !) , the gain is practically 1 and we have the lowest hiss possible.
Improvements: left pin of C2 goes to union R2/R3, where it is *much* more useful than decoupling +9V.
As shown it will also work, but what I suggest makes better use of it.
Congratulations.

[bdhact1]

J M Fahey, I can't thank you enough for getting me over that final hump. I've been racking my brain with this for several months (although I love the challenge). I thought I had tried this configuration a while back, but it was too early on and I didn't have all the components together, like the right pickup and placement of the pick up, as well as the right capacitors on my guitar. The photo didn't show a trace going from C1 to IC pin 3 either. I now believe the trace is out of view. Now with it all together it sounds perfect. It's also very responsive and and clear to the ears. My only choice now is should I use C2 as shown or use it as you suggested. There is just a slight variation in the tone. I'm probably going to opt for your recommendation. Thanks for the coaching. You are the best !

[J M Fahey]

Hey, thanks !!
I'm blushing !!

[teletroy]

J M Fahey, I can't thank you enough for getting me over that final hump. I've been racking my brain with this for several months (although I love the challenge). I thought I had tried this configuration a while back, but it was too early on and I didn't have all the components together, like the right pickup and placement of the pick up, as well as the right capacitors on my guitar. The photo didn't show a trace going from C1 to IC pin 3 either. I now believe the trace is out of view. Now with it all together it sounds perfect. It's also very responsive and and clear to the ears. My only choice now is should I use C2 as shown or use it as you suggested. There is just a slight variation in the tone. I'm probably going to opt for your recommendation. Thanks for the coaching. You are the best !

Any chance you mind sharing your final schematic?

thanks!

[erock]

Any chance you mind sharing your final schematic?

thanks!

this is one I made up based upone the recommendations above

[bdhact1]

this is one I made up based upone the recommendations above

That looks correct. An excellent unity gain buffer.

[Erbis]

Anyone have a schematic for this buffer? None of the attached thumbnails seem to work...

[bdhact1]

UGB Schematic

Anyone have a schematic for this buffer? None of the attached thumbnails seem to work...

Try this one. building a 'tiger preamp' unity buffer as used in jerry garcias guitars.

[Gomorrah]

Does anyone have a schem for this buffer?

[Chuck H]

...

[vintagekiki]

Jerry Garcia Tiger Preamp

https://groupdiy.com/index.php?topic=71838.0
Jerry Garcia Wolf and Tiger Guitar Schematics

https://groupdiy.com/index.php?action=dlattach;topic=71838.0;attach=66373;ima ge
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http://tagboardeffects.blogspot.com/2014/04/jerry-garcia-tiger-preamp.html
Jerry Garcia Tiger Preamp

1)
http://dozin.com/jers/guitars/tiger/info.html
Jerry Garcia's "TIGER GUITAR" by Doug Irwin

https://www.caesound.net/cb1guitarpreampbuffer.aspx
CB1 Guitar Preamp Buffer

http://dozin.com/jers/guitars/wolf/schematic.htm

http://dozin.com/jers/guitars/tiger/tiger_schematic.htm

https://en.wikipedia.org/wiki/Tiger_(guitar)

2) CAE sound CB2 preamp

https://www.tdpri.com/threads/jerry-g-guitar-templates.335630/#post-4290459


CAE sound CB2 preamp