Buffer circuit

Dave Hepworth · Post by **Dave Hepworth** » 11 Apr 2016 5:11 pm

Hi folks ,
Has anyone out there got a circuit diagram for a 9 volt guitar buffer circuit.I fancy making my own considering how cheap these components are to buy.I am ok at soldering and can follow a simple circuit diagram.
I would use it for steel guitar.
Thanks for looking Regards Dave.

Stephen Cowell · Post by **Stephen Cowell** » 11 Apr 2016 8:44 pm

Here's a good one...

http://music-electronics-forum.com/atta ... r_clon.gif

Steven Husting · Post by **Steven Husting** » 12 Apr 2016 1:34 am

Since you are in the UK, you could try this -

http://www.musikding.de/The-Buffer-Buffer-kit

I've built four or five of them, cheap, quick, works well. I put them in small boxes with a belt clip and leave one on each guitar strap for my main 6-strings.

steven

Scott Duckworth · Post by **Scott Duckworth** » 12 Apr 2016 4:00 am

Dave Hepworth · Post by **Dave Hepworth** » 12 Apr 2016 7:49 am

Thanks for the replies guys ! I am sure I can make one of these.It will be fun too.
Regards Dave.

ajm · Post by **ajm** » 12 Apr 2016 3:43 pm

One thing that I would do that isn't stated with the Stephen or Scott designs: Add a socket for the op amp.

For the Scott design, there are parts that are not shown on the schematic (the LED and resistor).

Also, the SPST switch appears to be used to turn the battery on and off. This is more commonly done by using a stereo jack on the input. When you unplug the input cable, the battery gets disconnected.

If you have a passive volume pedal, and built two of these and put them on the input and output, you'd have a buffered volume pedal.

Jack Stoner · Post by **Jack Stoner** » 13 Apr 2016 2:42 am

Find a used MXR Microamp. I have one that I used to use and it works great for this application.

Kevin Milner · Post by **Kevin Milner** » 13 Apr 2016 4:05 pm

I built this one and it has been living under my pedalboard for years. Sounds great and is already laid out for easy assembly on a stipboard.

http://tagboardeffects.blogspot.com/201 ... uffer.html

It is a clone of the famous Pete Cornish buffer that he sells for, well, a ridiculous amount of money for a buffer.

I don't notice it until it's gone when I find my high end disappears just a bit. Highly recommend and tiny tiny tiny.

Tom Gorr · Post by **Tom Gorr** » 13 Apr 2016 7:51 pm

My six string Guild superstrat has a single transistor and a 9V battery integrated with the guitar pickup wiring. .. I have no schematic but a buffer should not need to be more complex than about 5 parts...and cost less than 2 bucks. The Cornish schematic even seems more complex than it need be.

Dan Haas · Post by **Dan Haas** » 14 Apr 2016 6:06 am

***Updated was designed with obsolete FET now with an available FET link below***

Tinkered with the circuit above: Adjusted to allow for larger drive signal and allow for battery operation down to 6V / Gain slightly less around 2db

http://www.digikey.com/product-detail/e ... ND/5324373

quiescent current ~ 530uA