Fodera, Sadowsky, aguilar, and other bass preamps
- darmstat
- Breadboard Brother
Rcustoms....it looks like the 3 band bass EQ of the Seymour Duncan bass preamp. Bass (boost)90hz, mid cut 575hz, bass 32hz, mid 650hz, and treble 5khz. Using a bandpass EQ filter.
- rcustoms
- Resistor Ronker
Information
maybe i found many circuit based on.like jackson electronics guitar eq booster copied for esp and other brandsdarmstat wrote:Rcustoms....it looks like the 3 band bass EQ of the Seymour Duncan bass preamp. Bass (boost)90hz, mid cut 575hz, bass 32hz, mid 650hz, and treble 5khz. Using a bandpass EQ filter.
- rcustoms
- Resistor Ronker
Information
looks so good,good work ,is the definitive schematic or rev 1darmstat wrote:Rcustoms...I have this for a schematic so far. It is rough so be gentle....lol
- rcustoms
- Resistor Ronker
Information
the last model of fender basses(i don't remember which one) use this little demon,recently i install one, on an ibanez sound gr and is amazing what he does with a cheap pickups.rcustoms wrote:looks so good,good work ,is the definitive schematic or rev 1darmstat wrote:Rcustoms...I have this for a schematic so far. It is rough so be gentle....lol
Just in case someone's still interested: Here's a pcb I did for the Silent Fly’s Sadowsky Preamp schematic on the third page of this thread. I liked the sound a lot better with J201 transistors, drain voltages adjusted to about 4.4 V each. Replace R4 and R7 with trimmers to adjust the voltage.
Cheers, Lars
Cheers, Lars
- Duckman
- Opamp Operator
The 1M resistor at the input... goes to ground or to Vr?darmstat wrote:Rcustoms...I have this for a schematic so far. It is rough so be gentle....lol
Edit: I mean, in the Curbow schemo
- flood
- Resistor Ronker
Information
looks awesome baja, I might just give this a spin. wondering if I should try my buffer-before-blend concept with this design... it worked fantabulously with the Music man design.
In the interest of full disclosure, I am Animal Factory Amplification.
- lietuvis
- Breadboard Brother
Hi all, I came across the Yamaha BB604-605 bass service manual with schematic.The preamp has built in NE-1 parametric EQ for midrange control. Original PCB is double sided so I redesigned to single side PCB. I have not built it yet but have plan to do. On my PCB I designed the way that IC's are mounted on track side , but if legs are bent backwards it will fit as normal. If there are interest to make this preamp feel free to use or modify these files. The PCB is drawn on Sprint Layout 6.
- Attachments
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- BB604 605.rar
- (1.15 MiB) Downloaded 503 times
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- BB604_605_E.pdf
- (975.2 KiB) Downloaded 617 times
- deltafred
- Opamp Operator
Not my work, all credit goes to khutch on Talkbass.
See http://www.talkbass.com/threads/fender- ... es.934190/
(Apologies for the huge pictures.)
See http://www.talkbass.com/threads/fender- ... es.934190/
(Apologies for the huge pictures.)
Politics is the art of so plucking the goose as to obtain the most feathers with the least squawking. - R.G. 2011
Jeez, she's an ugly bastard, she makes my socks hurt. I hope it's no ones missus here. - Ice-9 2012
Jeez, she's an ugly bastard, she makes my socks hurt. I hope it's no ones missus here. - Ice-9 2012
bajaman wrote:okay - here are some graphs
the first is normalized to all controls flat (mid way)
then: full bass boost, full bass cut, full mid boost, full mid cut, full treble boost, and finally full treble cut.
enjoy
bajaman
Hi, i don't know how to read these grafs on page 5. I'm curious what is center frequencies of these preamp.
Thanks for help!
Are C13 electrolitic or no ?
- EddieTavares
- Breadboard Brother
Guys
What about using charge pump to increase the available voltage adding more headroom? Does it short the battery life?
What about using charge pump to increase the available voltage adding more headroom? Does it short the battery life?
- lietuvis
- Breadboard Brother
- clintrubber
- Breadboard Brother
Information
Just curious which forum that was, I don't remember ...lietuvis wrote:Here is another interesting bass preamp (has minor errors) with variable low pass filter and switchable Q found on other forum.
(based on the file-names I'm fairly sure I did make those scans from a Dutch magazine)
Bye
- lietuvis
- Breadboard Brother
Well it is you by the name on the other forum, thank you for sharing, but if you want it to be removed ask administrators to delete it.clintrubber wrote:Just curious which forum that was, I don't remember ...lietuvis wrote:Here is another interesting bass preamp (has minor errors) with variable low pass filter and switchable Q found on other forum.
(based on the file-names I'm fairly sure I did make those scans from a Dutch magazine)
Bye
- clintrubber
- Breadboard Brother
Information
No problem at all, only glad it might be of use. Was just curious where I had posted it - DIYSB ?
Have a good wknd
Have a good wknd
- clintrubber
- Breadboard Brother
Information
Digging this Sadowsky preamp up from page 3.Silent Fly wrote:Based on the indications supplied. It should be correct:
It makes sense to have treble-cut as well, and that has indeed been added as the VTC (Vintage Tone Control...)
So you have four controls in total: Bass-Boost, Treble-Boost, Volume and Passive-Tone (Treble-Cut).
There are reasons for putting the Passive Tone control before the preamp,
as well as for putting it after the preamp.
Just curious, anybody an idea what the original does here ?
Bye