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03-16-2007, 11:55 PM
| | Registered User | | Join Date: Dec 1999 Location: Canton, IL USA | | | Aguilar OBP1 wiring question
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I'm trying to install this blasted OBP1 and the schematic seems incomplete. I am trying to install this in a jazz bass. Here goes...
1. I'm wiring both pickups to one volume pot. Where does the hot go, and where does the ground go?
1 1/2. does the terminal on the left of the volume pot get soldered to the back of the pot like on passive wiring?
2. Where does the bridge lead go?
3. battery lead goes red from preamp to red on the battery lead, then black to black, then red to jack, right?
I must be an idiot. I got no sound on any of my attempts to wire this thing. Nothing. Not even when I try touching around on the wiring...  |
03-17-2007, 01:28 AM
| | Registered User | | Join Date: Jul 2005 Location: Croatia | | I'm afraid you need a volume pot for each pickup or alternatively a blend control. Also check wiring diagrams on Aguilar's site. http://www.aguilaramp.com/pdf/support_wiring_obp1.pdf
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" Jazz is not dead, it just smells funny!" - FZ
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03-17-2007, 08:06 AM
| | Registered User | | Join Date: Dec 1999 Location: Canton, IL USA | | | One volume pot works just fine. Anyone else? |
03-17-2007, 10:06 AM
|  | in love w/a girl named velveta | | Join Date: Jul 2006 Location: Ukiah, CA | | Quote:
Originally Posted by Chris Breese  One volume pot works just fine. Anyone else? | the pup hots go to the center lug on the volume pot, the pup grounds go to the left lug. (use the diagram for the two volume setup, minus one pot  ) |
03-17-2007, 12:53 PM
| | Registered User | | Join Date: Dec 1999 Location: Canton, IL USA | | | OK. Tried that. Still nothing so much as a hum. Even when I go around touching the pots, terminals. etc. Could the preamp be DOA? I've checked the wiring numerous times. Getting frustrated here... |
03-17-2007, 01:47 PM
|  | Registered User | | Join Date: Nov 2004 Location: Lancaster, OH | | | So, you want to run with 1 volume pot controlling both pickups, so their volume is always identical? |
03-17-2007, 02:02 PM
| | Registered User | | Join Date: Dec 1999 Location: Canton, IL USA | | | Yeah, I usually run both volumes on full, and I don't have an extra hole in the control plate. In the future, I may drill a hole in the body for the jack. I can't even get it to make any noise with only one pickup. I may have to just start over, and use a different volume pot. I figured it would make some kind of noise... |
03-17-2007, 02:09 PM
|  | Registered User | | Join Date: Apr 2000 Location: New Haven, CT | | | Explain what you are doing in #3 again- as the "red to output jack" is miiiighty fishy. Draw up a picture in paint of what your current schematic is. Are you using 9V or 18V? |
03-17-2007, 02:53 PM
| | Registered User | | Join Date: Nov 2004 Location: Lancaster, OH | | | Actually, I see what you might be doing wrong.
You say "battery lead goes red from preamp to red on the battery lead, then black to black, then red to jack, right?".
Actually, no. In order for 2 9v batteries to be wired in 18v, it should go red from pre to red from first battery, then the 2 inner wires from both batteries (in this case a red and a black) are wired together, then the other black wire goes to the jack. If you wired it black to black, I think the batteries are wired in parallel, making it a 9v system, with, essentially, twice the battery life of a normal 9v system (due to the 2 batteries). The way I explained wires them in series, making it 18v. Look closely at the diagram and make sure the corect posts on the batteries are wired together. Theoretically, since this is an 18v pre, wiring it in 9v would cause it not to power up. |
03-17-2007, 03:00 PM
| | Registered User | | Join Date: Jul 2005 Location: Croatia | | | #3 - Red from preamp to red battery terminal (+) black terminal (-) from first battery to red terminal on the second battery (+) and black terminal (-) from second battery to ring on the output jack.
Edit: I was too slow typing this.
__________________
" Jazz is not dead, it just smells funny!" - FZ
Cantaloupe Club Member #002 / Cort Club #4
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03-17-2007, 03:04 PM
| | Registered User | | Join Date: Nov 2004 Location: Lancaster, OH | | | lol.... I'm just glad we both caught it. I'm still very green when it comes to wiring, so it's good to know when I get something right! |
03-17-2007, 03:06 PM
| | Registered User | | Join Date: Jul 2005 Location: Croatia | | Quote:
Originally Posted by Chris Breese Yeah, I usually run both volumes on full, and I don't have an extra hole in the control plate. In the future, I may drill a hole in the body for the jack. I can't even get it to make any noise with only one pickup. I may have to just start over, and use a different volume pot. I figured it would make some kind of noise... |
Instead of drilling holes you could get a stacked pot for the bass and treble tone control.
__________________
" Jazz is not dead, it just smells funny!" - FZ
Cantaloupe Club Member #002 / Cort Club #4
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03-18-2007, 02:05 AM
| | Registered User | | Join Date: Dec 1999 Location: Canton, IL USA | | | Ok. Thanks, guys. I would love to get a bass/treble stack, but right now, I can't get this thing to make any noise at all. I do have the batteries wired up right to the schematic (and as you all pointed out above). Thanks again! There must be something else wrong here.
Hmmmmmmmm.
Last edited by Chris Breese : 03-18-2007 at 02:08 AM.
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03-18-2007, 02:23 AM
| | Registered User | | Join Date: Jul 2005 Location: Croatia | | | A picture would be great.
__________________
" Jazz is not dead, it just smells funny!" - FZ
Cantaloupe Club Member #002 / Cort Club #4
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