Fodera, Sadowsky, aguilar, and other bass preamps
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
Here is the photoview of the SMD board
and a black and white view without the silkscreen legend 600dpi
300dpiand a black and white view without the silkscreen legend 600dpi
be kind to all animals - especially human beings
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
I have the gerber files for the silkscreen and the copper (*.GBR) but the forum will not allow me to upload them
bajaman
bajaman
be kind to all animals - especially human beings
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
tried .txt ,.jpg, .bmp etc - none worked
email me if you need it
bajaman
email me if you need it
bajaman
be kind to all animals - especially human beings
- darmstat
- Breadboard Brother
This is my first attemp at using the Express SCH software to make a schematic for the Vente. Thanks for all the work Bajaman. Did you use 8 KHZ OR 12 KHZ for the treble frequency for the Fender 3 band eq?
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
ALL the info you need is in the schematic and the graphsDid you use 8 KHZ OR 12 KHZ for the treble frequency for the Fender 3 band eq?
By the way - your schematic with OPA2134 op amp has many mistakes and WILL NOT work as drawn.
ALSO - OPA2134 draws much higher current than the low current TL062 or it's National Semiconductor equivalent the LF422
The American Deluxe Fender Jazz Bass circuit is also powered by 18 volt NOT 9 volt which can easily overload (not in a nice way ) when extreme settings are used on the tone controls.
Who the hell is Vente anyway
cheers
bajaman
be kind to all animals - especially human beings
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
still some mistakes
be kind to all animals - especially human beings
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
pin 4 of the first op amp should be connected to the junction of the 10k resistors and the +9v supply should be connected to pin 8 and pin 4 should be connected to ground
be kind to all animals - especially human beings
- deltafred
- Opamp Operator
The reference (half supply) voltage divider is wrong, the resistors are correct, the caps aren't. You don't want a cap across the top reistor, it sould go across both resistors.darmstat wrote:Ok...What may thoses mistakes be? Please.
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
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
agreed, but in practice it makes very little difference in this case - only 47n in series with 47u which is 1000 times the size. In reality when running from a battery source the 47n is totally uneccessary and so is the diode unless you insist on connecting the battery the wrong way aroundThe reference (half supply) voltage divider is wrong, the resistors are correct, the caps aren't. You don't want a cap across the top resistor, it should go across both resistors.
cheers
bajaman
be kind to all animals - especially human beings
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
For all those who do not want SMD board layout, I shall be designing a through hole component board layout in the next few days for my BAJA three band bass preamp
be kind to all animals - especially human beings
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
still NOT correct darmstat
see my post (4 back in this thread )
between the junction of the 10k resistors etc
bajaman
see my post (4 back in this thread )
between the junction of the 10k resistors etc
bajaman
be kind to all animals - especially human beings
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
almost there - just connect pin 8 of the op amp to +9v and pin4 to ground and it will work properly
bajaman
bajaman
be kind to all animals - especially human beings
- darmstat
- Breadboard Brother
It is very sad Bajaman. I have built 2 of these and from a handwritten schematic. I try to use the software to make one schematic and it takes 4 tries. I should have just uploaded the handwritten one, but i wanted it to look nice.... Thanks for the help and believe me the preamp does work...