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03-02-2010, 08:48 PM
|  | Registered User
Head Tinkerer, The Flufflab | | Join Date: Mar 2009 Location: California | | Quote:
Originally Posted by BassLife77  I wouldn't trust that schematic. as you can see the capacitors on the schematic don't match up with the ones on the layout | Well spotted. Looks like a 1u has been exchanged for a 10u. Probably a typo.
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Grasping the vine with one hand, he plucked the strawberry with the other. How sweet it tasted! |
03-02-2010, 09:14 PM
| | Registered User | | Join Date: Nov 2009 Location: San Diego | | Quote:
Originally Posted by UncleFluffy Well spotted. Looks like a 1u has been exchanged for a 10u. Probably a typo. | thats it, according to bajaman the layout is correct and the schematic is wrong. there should be two 10u caps, as it shows in the illustration at the musicman.org site. I wish there was somewhere I could buy a fresh PC board. there is definitely a market for them. |
03-02-2010, 09:20 PM
| | Registered User
Head Tinkerer, The Flufflab | | Join Date: Mar 2009 Location: California | | | I can photoetch one for you if the layout's good, but probably won't have time to drill it out. PM me if that would work.
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Grasping the vine with one hand, he plucked the strawberry with the other. How sweet it tasted! |
03-02-2010, 11:09 PM
|  | Registered User
Exar went out of business, so... | | Join Date: Oct 2005 Location: PDX, OR | | | Tell you what, I'd buy a couple of boards off you. I don't mind doing the drilling. |
03-02-2010, 11:23 PM
| | Registered User
Head Tinkerer, The Flufflab | | Join Date: Mar 2009 Location: California | | | The original is a bit blurry so I'm going to redraw it. Will keep the layout and wiring the same to avoid confusion but the traces may move slightly as it'll be on a fixed grid.
For those who want one, it'll be just the cost of a beer (to keep me lubricated while working) + shipping.
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Grasping the vine with one hand, he plucked the strawberry with the other. How sweet it tasted! |
03-03-2010, 12:51 AM
| | Registered User
Head Tinkerer, The Flufflab | | Join Date: Mar 2009 Location: California | | I'm off to bed. Anyone who's suffering from insomnia, please feel free to check this first draft of a cleaned-up layout: 
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Grasping the vine with one hand, he plucked the strawberry with the other. How sweet it tasted! |
03-03-2010, 10:34 AM
| | Registered User | | Join Date: Nov 2009 Location: San Diego | | Quote:
Originally Posted by UncleFluffy I'm off to bed. Anyone who's suffering from insomnia, please feel free to check this first draft of a cleaned-up layout: | looks great!  |
03-03-2010, 10:45 AM
|  | Registered User | | Join Date: Jan 2002 Location: Yucaipa, CA | | | This is interesting... |
03-03-2010, 11:25 AM
| | Registered User | | Join Date: Aug 2006 Location: Coeur d'Alene | | | Goes to show you get what you pay for I guess. I'll shell out for the East pre if I need to after reading all this.
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Do you want the mustache on or off?... Too bad. |
03-03-2010, 11:41 AM
| | Registered User | | Join Date: Nov 2009 Location: San Diego | | Quote:
Originally Posted by CapnSev Goes to show you get what you pay for I guess. I'll shell out for the East pre if I need to after reading all this. | I guess its the law of averages. I've purchased great stuff on the cheap. buying cheap stuff you are bound to get a dud sooner or later. the knowledge I gained from TB is far more valuable than the $39 I wasted on that preamp |
03-03-2010, 11:52 AM
|  | Registered User | | Join Date: Mar 2000 Location: P-town, OR | | Quote:
Originally Posted by CapnSev Goes to show you get what you pay for I guess. I'll shell out for the East pre if I need to after reading all this. |
Apparently Jeff has been doing something right. His Ebay feedback bears that out. He has shown that he cares for what he does by standing in front of the fire here on TB...which can be a very tough audience.
The bottomline is that it is a product that is offered at a substantially reduced cost over the East offering. Grant it, it is only $40 and some change but it should work. And it should give the appearance of being a professionally manufacturing dispite the reasonable costs.
I do believe that you do get what you pay for. But I think that the East pre is out of my price spec. The East setup is a complete package with plate, pots and wiring. But I just want something more simple like Jeff is offering here.
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RIP Adrian Garcia
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03-04-2010, 05:40 PM
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Originally Posted by BassLife77 it was acccording to this pre-EB StingRay preamp. the one they sent me has the same parts and layout. since the board looks pretty good I'm gonna attempt  to desolder it and replace all the parts. with my limited skills it might take a month  | You might have soldered something up wrong. I messed up at first on the one I've got setup as a stompbox. It was a bitch troubleshooting it but I got it up and running. You guys are crazy if you think these are crap. It's one of the best sounding active pres I've used. |
03-04-2010, 05:51 PM
| | Registered User | | Join Date: Nov 2009 Location: San Diego | | Quote:
Originally Posted by moobass You might have soldered something up wrong. I messed up at first on the one I've got setup as a stompbox. It was a bitch troubleshooting it but I got it up and running. You guys are crazy if you think these are crap. It's one of the best sounding active pres I've used. | its soldered correctly. I traced every wire a million times. I am getting a clean signal despite the voltage leakage. there is something bad on the board.
Last edited by BassLife77 : 03-04-2010 at 07:50 PM.
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03-04-2010, 06:04 PM
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Originally Posted by BassLife77 its soldered correctly. I traced every wire a million times. since I am getting a signal despite the voltage leakage there is something bad on the board. | I see now, I just reread your post. Do you have the battery power going to the tip of input jack? |
03-04-2010, 06:42 PM
| | Registered User | | Join Date: Oct 2008 Location: Vermont | | Quote:
Originally Posted by bongomania Tell you what, I'd buy a couple of boards off you. I don't mind doing the drilling. |
I would too.
My '76 is still on it's original pre, probably won't last forever. |
03-04-2010, 06:52 PM
| | Registered User | | Join Date: Nov 2009 Location: San Diego | | Quote:
Originally Posted by moobass I see now, I just reread your post. Do you have the battery power going to the tip of input jack? | that wouldn't make much sense. I have it wired exactly like the original diagram. same wire colors  |
03-04-2010, 07:13 PM
| | Registered User
Head Tinkerer, The Flufflab | | Join Date: Mar 2009 Location: California | | | Second revision of the board artwork done - I'll run off a dozen this weekend.
Note: if you're not comfortable drilling a bunch of 0.8mm (30 mil) holes, then this may not be for you.
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Grasping the vine with one hand, he plucked the strawberry with the other. How sweet it tasted! |
03-04-2010, 07:52 PM
| | Registered User | | Join Date: Nov 2009 Location: San Diego | | Quote:
Originally Posted by UncleFluffy Second revision of the board artwork done - I'll run off a dozen this weekend.
Note: if you're not comfortable drilling a bunch of 0.8mm (30 mil) holes, then this may not be for you. | drilling is easy. the hard part is gonna be soldering that IC socket  |
03-04-2010, 08:52 PM
| | | Quote:
Originally Posted by BassLife77 that wouldn't make much sense. I have it wired exactly like the original diagram. same wire colors | That's not the diagram that came with mine. That might be the problem. The one I have looks more like this below. What I am getting at is you need a special jack. I forget the model number but it disconnects the battery turning off the preamp when you unplug your bass. You could get away with a stereo jack but the battery will be on even when the bass is unplugged. Ernie Ball sells the right jack that's where I got mine. 
Last edited by moobass : 03-04-2010 at 08:56 PM.
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03-04-2010, 09:40 PM
| | Registered User | | Join Date: Jul 2004 Location: Gladstone, QLD, Australia | | Quote:
Originally Posted by BassLife77 drilling is easy. the hard part is gonna be soldering that IC socket | agreed, that one pin trace doesn't have to run so close to the other with that right-angle bend... just run it straight over at an angle. | | Thread Tools | Search this Thread | | | | 
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