Fodera, Sadowsky, aguilar, and other bass preamps

Stompboxes circuits published in magazines, books or on DIY electronics websites.
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bajaman
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Post by bajaman »

hello Immo :)
Sorry about the dark grey - I was trying to get the best resolution artwork for under the 1M posting limit :wink:
I think I tried posting the gerber files as .txt (and many other formats)
I will try again and see.
cheers
Steve
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Post by bajaman »

OKAY
I tried to upload the gerber files as *.txt and got the message that txt files are NOT allowed.
I give up :evil:
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Post by bajaman »

Baja fender three band jazz bass preamp 101112.gif
the gif file as requested :wink:
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Post by lietuvis »

bajaman wrote:OKAY
I tried to upload the gerber files as *.txt and got the message that txt files are NOT allowed.
I give up :evil:
bajaman
Hi Bajaman you can try to upload a zip file, previously I was able to do so. right click on mouse then compress file or a few files on mac os, something similar would be in windows, name it whatever you want and upload if its under allowed size to forum

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Post by bajaman »

Baja three band jazz bass preamp gerber files.zip
(20.71 KiB) Downloaded 536 times
Okay - thanks for the suggestion lietuvis :thumbsup
Here is a zip file containing the gerber files for both SMD and through hole boards :wink:

They are both together, but if you know how to use gerber files you should now how to edit them to suit your chosen format :)
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Post by bajaman »

RE: BAJA three band active bass preamp:
Here is a more friendly component value schematic for the through hole board layout.
multisim baja three band active bass preamp 171112.png
I very much doubt that you would hear any difference to the 051112 schematic previously posted in this thread, but I am sure you will find the components much easier to find.
You can use either the LF442 or TL062 (both are equivalent bifet input low current drain op amps for extended battery life :wink: )
I just finished populating a through hole board with these component values - it will be a wee while before I can install it in the Jazz bass I am putting together though - I have to make the body first :lol: I already have the neck, machine heads, pickguard, control plate and pick ups (neodymium button magnet and steel pole piece design) sorted, so won't be too long before I can play it :wink:
cheers
bajaman
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Post by bajaman »

Baja three band active bass preamp through hole board 171112 .gif
Baja three band active bass preamp through hole board 171112 .gif (70.47 KiB) Viewed 9887 times
here is a quick scan of the completed PCB :wink:
missing capacitor (470n) is smd on rear of board :)
NO noisy carbon comp capacitors fitted :roll:
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Post by alexradium »

this is cool,what are the center frequencies for each band?
I'd like to know if there is an existing board with fixed B and T and parametric mids all in one,otherwise i could try to design it myself.
That with a 20dB boost would be the end of all pres.

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Post by bajaman »

this is cool,what are the center frequencies for each band?
look back in the thread :wink: - see the graphs :roll:
HINT: halfway down page 5 :secret:
That with a 20dB boost would be the end of all pres.
Way too much boost :slap:
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Post by alexradium »

ok thank you

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Post by Duckman »

bajaman wrote:
Baja three band active bass preamp through hole board 171112 .gif
here is a quick scan of the completed PCB :wink:
missing capacitor (470n) is smd on rear of board :)
NO noisy carbon comp capacitors fitted :roll:
cheers
bajaman
Looks really beautiful! Baja, you´re a master!

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Post by rcustoms »

my contribution
a complete project on the yamaha's type preamplifier founded in many brands,who cloned this circuit
YAMAHA TMB.pdf
complete project
(1.91 MiB) Downloaded 780 times
I hope you enjoy
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guitars,pedals and amps.
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Post by rcustoms »

another ,peavey cirrus bass
cirrus bass.bmp
cirrus bass.bmp (897.25 KiB) Viewed 9810 times
cirrus bass.bmp2.bmp
cirrus bass.bmp2.bmp (898.3 KiB) Viewed 9810 times
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Post by ezugaru »

bajaman wrote:RE: BAJA three band active bass preamp:
Here is a more friendly component value schematic for the through hole board layout.
multisim baja three band active bass preamp 171112.png
I very much doubt that you would hear any difference to the 051112 schematic previously posted in this thread, but I am sure you will find the components much easier to find.
You can use either the LF442 or TL062 (both are equivalent bifet input low current drain op amps for extended battery life :wink: )
I just finished populating a through hole board with these component values - it will be a wee while before I can install it in the Jazz bass I am putting together though - I have to make the body first :lol: I already have the neck, machine heads, pickguard, control plate and pick ups (neodymium button magnet and steel pole piece design) sorted, so won't be too long before I can play it :wink:
cheers
bajaman
Hi bajaman, there is no C12 right? it jumps from C11 to C13, greethings!
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Post by bajaman »

Hi bajaman, there is no C12 right? it jumps from C11 to C13, greethings!
correct :wink:
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Post by B3ar »

Hidden tracks on SMD are a pain. And it's always a little odd to trace a partially populated board. SoI'm pretty much giving up on this, the active circuit from my 4 string Dearmond Pilot pro. I'm just gonna assume standard BF Fender-style TMB unless I get a bug to follow through on the trace.

The external connections are on the PDF.
Attachments
DeArmond_Pilot_Pro_Basses.pdf
Dearmond Pilot external wiring
(109.33 KiB) Downloaded 426 times
Dearmond Pilot back
Dearmond Pilot back
Dearmond Pilot front
Dearmond Pilot front

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Post by alexradium »

[quotes="B3ar"]Hidden tracks on SMD are a pain. And it's always a little odd to trace a partially populated board. SoI'm pretty much giving up on this, the active circuit from my 4 string Dearmond Pilot pro. I'm just gonna assume standard BF Fender-style TMB unless I get a bug to follow through on the trace.

The external connections are on the PDF.[/quote]

This is the same Board on the Cort gb75 i had
I did tracing and its all based on gyrators

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Post by B3ar »

alexradium wrote:[quotes="B3ar"]Hidden tracks on SMD are a pain. And it's always a little odd to trace a partially populated board. SoI'm pretty much giving up on this, the active circuit from my 4 string Dearmond Pilot pro. I'm just gonna assume standard BF Fender-style TMB unless I get a bug to follow through on the trace.

The external connections are on the PDF.
This is the same Board on the Cort gb75 i had
I did tracing and its all based on gyrators[/quote]

You know, if I had thought about that, I might have started to look at Cort as it's Korean made. Thanks for saving me the effort on this.

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Post by rcustoms »

B3ar wrote:Hidden tracks on SMD are a pain. And it's always a little odd to trace a partially populated board. SoI'm pretty much giving up on this, the active circuit from my 4 string Dearmond Pilot pro. I'm just gonna assume standard BF Fender-style TMB unless I get a bug to follow through on the trace.

The external connections are on the PDF.
ok folks ,let me help ,i been working on this version of the circuit and has two additional trimmers and a little few more components.i trace everything and this is my work,not checked, but I think together we can finish.
PRE CURBOW AND PILOT.pdf
(95.79 KiB) Downloaded 542 times
I made this PCB with no SMD components
PRE CURBOW AND PILOT 2.pdf
(184.02 KiB) Downloaded 485 times
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rcustoms
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Post by rcustoms »

wiring and trimmers func.
curbow B4_w.jpg
curbow back controls.jpg
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