• TalkBass has been independent since 1998. Add your voice.
    Create a free account to reply to discussions, view embedded media, and browse with fewer display ads.
    Join freeLog in
    Want zero display ads or expanded classifieds tools? Compare plans.

Need help wiring up bartolini preamp

Instead of the four green and yellow wires going to separate posts, they are wired together on the top two posts. green and green, yellow and yellow.

Well that's it then. Doesn't make any sense why someone would do that, but then again you shouldn't waste brain cells trying to guess what other people are motivated by sometimes.

Identify the green and yellow running to the preamp. Wire those to the top two pins. Wire the pair going to the blend and jack to the middle two pins. Doesn't matter which side of the switch gets green and which gets yellow as long as yellow is on the same side as yellow and green with green. Then make sure there's a jumper across the bottom two pins and you should be good to go. Then we can go figure out your mid switch.
 
Ok, quick update. I finally got back into the fight tonight. Spent 2 hours rewiring the mid section. As mentioned earlier, only the 250hz worked. Now, got the 250, and I am guessing 800Hz. What a nightmare. why would someone go through all the trouble to deconstruct an awesome preamp????
So if time allows tomorrow, I will tackle the active passive switch. Thanks again guys, its going to be worth it i know.
PS I had the trim knob on the 100% loud side lol. So I dialed it all the way back.
Will post pics when I finish!
 
  • Like
Reactions: Reedt2000
Progress!

What's your pickup height like? I have at least one bart-equipped bass with the preamp gain turned all the way up, and it's loud but not crazy loud. Wondering if your pickups are higher than mine, or they're just really hot pickups...
 
  • Like
Reactions: grouse789
image.jpeg
image.jpeg
image.jpeg
image.jpeg
image.jpeg
image.jpeg
Nicely done :thumbsup:

What bass is this? Pics?
Ok guys here it is!
 

Attachments

  • image.jpeg
    image.jpeg
    344.1 KB · Views: 28
  • image.jpeg
    image.jpeg
    301.9 KB · Views: 25
  • image.jpeg
    image.jpeg
    432.8 KB · Views: 29
  • image.jpeg
    image.jpeg
    571.5 KB · Views: 32
Heck Yeah! Check that out :woot:

I love the neck, really nice bass :thumbsup:

I assume this means you've got things straightened out? I wonder if you could steel wool that radial pattern into the top of the concentric knob. That or replace just the top control with a smaller diameter version of the other vintage stereo style knobs you've got...
 
  • Like
Reactions: grouse789
Heck Yeah! Check that out :woot:

I love the neck, really nice bass :thumbsup:

I assume this means you've got things straightened out? I wonder if you could steel wool that radial pattern into the top of the concentric knob. That or replace just the top control with a smaller diameter version of the other vintage stereo style knobs you've got...
Yes, got it all straightened out. soldering in tight places is very very frustrating. lol.
Yea that concentric knob bums me out a little bit. Steel wool might be a good idea.
So on to the Bart's and the Bart sound. hmmmmm. I didn't realize that when in passive I have no treble control. In Passive they sound, hmmmm trying to find the right word. Not muddy, but not crisp that is for certain. (maybe it's the inherent mid bump on them??) So I dial in some treble on the amp and it's pretty good.
Ok the preamp. very very very sensitive. Everything flat, yet there is treble, like a passive j bass with the treble knob halfway up. Gobs of bass, gobs of mids, and a lot of treble. Just a tiny turn is all you need or beware.
Oddly when the treble is turned all the way down it doesn't get the traditional burpy mid muffle thing that I get on my J basses.
Another interesting sound is both pickups together. Ok, in active mode, they sound great alone or slightly blended. But when I set the blend to center detent the sound decreases a tiny bit. It's there, the good stuff at 50% blend but sounds buried. I am wondering if a V/V would be better than the volume/blend?
The P pickup sounds great, the J sounds great. I also ran it passive into an Aguilar tone hammer pedal and that sounded better to my ears than the Bart pre.
I will make some sound clips to show what I am taking about with the pickups.
Thanks again for the help!
 
  • Like
Reactions: Reedt2000
hey guys, I really dig these pickups. They are growing on me. Strange, but Ive got the bridge pickup a hair under the strings, neck PU is in regular place. Im not really feeling te preamp at this time. Going to wire it up passive. VVT. 250K pots. What capacitor should I go with? thanks