small preamp design for a bass guitar

[Gene_Johnson]

Jarno,

Yes, there are a number of different options and altering the cavity is definitely one. But altering the cavity size and location also changes the resonance of the body. So it’s almost a catch 22.

My focus is on using an existing tone control and preamp design that cause/create little to no distortion. Not that I’m a purist, but I want a good clear and clean signal going out of the guitar. ,

I think, perhaps mistakenly, the best place for intelligent distortion systems should be located between the guitar and speakers.

Additionally, I’m still trying to find a good conductive paint. Ibanez coats their cavity to shield the electronics from all kinds of nasty stuff like lighting systems etc.

Yes, I did click on Minion’s pictures; one was very legible but other was not as clear. Since there are two standards for component symbols and values are often critical, I wanted to be positive everything was right before grabbing a soldering iron.

Gene

[Jarno]

I don't think you'll change the resonance much on a electric guitar or bass, but fitting it in an existing cavity is less work of course. For conductive paint, blackboard paint is reported to work as there are iron particles in there, haven't tried it myself.
Alternatively, there's the silver loaded paint Alembic is using, but that stuff is ueber costly

[Minion]

This one should be bigger ....

[Gene_Johnson]

Minion,

Thanks for taking the time to post a larger schematic. I appreciate your help.

Gene

[Enzo]

Stew MAc sells conductive paint, as I suspect do other gui9tar parts sellers.

Search results for "conductive paint" at Stewart-MacDonald

[tinitus]

Google search on a different matter also gave this one
Havent looked much at it, but could be interesting

FET Preamplifier, Part 1

Wow, it can be mounted on guitar strap
And especially good fore piezo pickups
And thats what I plan use fore my bass

[Gene_Johnson]

This might help:

J201 FET - Google Search

combine the two lines to form a single link.

Components are available, but the issue is the PCB. Rather than breadboarding, it's easier, neater and faster to use a printed circuit board.

But there is generally a minimum requirement. We need a bunch of guys to agree on a single design and do a PCB run.

[Gene_Johnson]

Tinitus,

First I sincerely hope you don't have Tinnitus. That could ruin those great bass moments.

Regarding the circuit . . . electronics is the key. If you have good pickups, a good body and neck - all you really need is the electronics to “supercharge” your guitar. DIY is the cheapest method to increase your guitar’s tonal performance in a big, big way..

But don’t listen to me, there are some really bright guys on this forum – so get some feedback from them as well.

[lewischange]

I'm in the process of putting a preamp in my bass. Have a look at the Hugsley design. One important note: the characteristics of the J201 FET must be measured. Hugsley has a nice procedure for doing this. Also, not all J201's will work in the circuit. You'll probably have to buy a few and find one whose characteristics will work.

Here's the link to the Hugsley design:

http://www.diyaudio.com/forums/music...roject-11.html

[tinitus]

Originally Posted by Gene_Johnson

But there is generally a minimum requirement. We need a bunch of guys to agree on a single design and do a PCB run.

Hi
Thanks, no my tinitus is not too bad, but its there and I need to be careful what I do
Low noise gear is essential

I have bought expencive wood to build a 4-string bass guitar
Hopefully the best ever
Nah, but I have build a violin, but my hart is to the bass, also in the music, I dont deny it, I love bass, pure and clean

I want to use one of the new ABM bridges with integrated piezos, fore a smooth build
I expect it will need some sort of pickup preamp
So yes, I am definately interested in this
Especially a simple low noise design running on low 9V
And preferably low power consumption and long lasting battery

Such simple design would be easy to hardwire
No need to design a board
We could easily do a layout so simple that anyone could assemble

Mind you, I have no interest in controls of any kind
New commercial main preamps have plenty of those
May be different with standard double pickups
Its all complete new to me
I didnt plan to do this now, but now you are on it why not join in

Concerns about Tillman pre
Is J201 available
Hawes says its close to perfect to run on 9V battery
These guys definately know their stuff
http://www.till.com/articles/GuitarPreamp/
http://www.hawestv.com/amp_projects/...fetpreamp1.htm