E.W.S Tri-Logic II Bass Preamp [traced]
For those willing to verify the layout. Here's an updated layout as per a friend's suggestion. A minor change on a jumper. Paper size is A4. Print without page scaling.
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- chicago_mike
- Tube Twister
I'll test the new version asap.
Skyline FX 2013
- OrionManMatt
- Breadboard Brother
I'm back in town from holiday and will have a chance to look your file over on Monday, bluetube.
I guess I could have shipped it to chicago mike while I was gone... in retrospect...
I guess I could have shipped it to chicago mike while I was gone... in retrospect...
- chicago_mike
- Tube Twister
Oh don't do that now!!!
I leave for a 3 month long cruise ship gig in a couple weeks!
I leave for a 3 month long cruise ship gig in a couple weeks!
Skyline FX 2013
Thanks Matt. Niki filled in some of the blanks. It would be nice if you can go through those four resistors. Me being OC I guess. No rush bro.OrionManMatt wrote:I'm back in town from holiday and will have a chance to look your file over on Monday, bluetube.
I guess I could have shipped it to chicago mike while I was gone... in retrospect...
Mike are you bringing DIY stuff along with you during the cruise? If inspiration strikes I might just prototype this for confirmation. Either that or I'm going to pester a friend to do it for me.chicago_mike wrote:Oh don't do that now!!!
I leave for a 3 month long cruise ship gig in a couple weeks!
ejbasses wrote:bluetube wrote:
Mike are you bringing DIY stuff along with you during the cruise? If inspiration strikes I might just prototype this for confirmation. Either that or I'm going to pester a friend to do it for me.
- quaternotetriplet
- Resistor Ronker
do anyone know where i can get center detent pots for this preamp?
- oscarv77
- Solder Soldier
Did you ever have a chance to try the new version? I want to start a new project and since I've been playing bass in a band for the past few months, I figured I'd try to build a bass pedal.chicago_mike wrote:I'll test the new version asap.
- alexradium
- Resistor Ronker
i am currently testing this project,source resistor of BS170 is 10K,you can see it in the photos,this way you get a buffer.bluetube wrote:For those willing to verify the layout. Here's an updated layout as per a friend's suggestion. A minor change on a jumper. Paper size is A4. Print without page scaling.
last parallel resistor on volume should be 270K,i used 220k.
mid shift switch isn't much effective,i'd like to try other solutions.
Final test in the next days with a proper 18V supply,now i'm having problems with an LT1054 doubler.
cheers
- alexradium
- Resistor Ronker
its a good preamp,especially if you play passive bass.oscarv77 wrote:Alex, please let me know how it turns out. I'm *this* close to just buying the pedal...
Its not difficult to do,not expensive,sounds good and clean.
My next move will be to try to incorporate a parametric shifting mid control like the BMC,that would make it super versatile.
- chicago_mike
- Tube Twister
I have a vari-mid schme from an ibanez bass...should be easy to add to this guy.
Skyline FX 2013
- alexradium
- Resistor Ronker
i just found that bypassing the 2.4k in series with the mid capacitor (47 or 100n) will give 2 higher band values,similar to those declared for the Xotic basses,i'm going to test this soon.chicago_mike wrote:I have a vari-mid schme from an ibanez bass...should be easy to add to this guy.
- chicago_mike
- Tube Twister
coolness.
Skyline FX 2013
- alexradium
- Resistor Ronker
even more,new version of the Xotic onboard pre has a treble shifting from 6 to 12Khz.alexradium wrote:i just found that bypassing the 2.4k in series with the mid capacitor (47 or 100n) will give 2 higher band values,similar to those declared for the Xotic basses,i'm going to test this soon.chicago_mike wrote:I have a vari-mid schme from an ibanez bass...should be easy to add to this guy.
that can be accomplished lowering the treble wiper resistor,there are 2 values in the photos,1k and 1.8k.
i'd go for 1.8k for 6khz and 470r for 12khz.
extra slap!
I will report after further testing with scope.
- chicago_mike
- Tube Twister
Where di you get the photos? Mt lazy internets search showed zip.
Skyline FX 2013
- alexradium
- Resistor Ronker
all i have seen so far is in this thread,then i work out some changes on a simulation before testing.chicago_mike wrote:Where di you get the photos? Mt lazy internets search showed zip.
- OrionManMatt
- Breadboard Brother
I wouldn't mind finding out how to change the lows to 40, highs to 4k.