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02-03-2013, 10:35 PM
|  | Registered User | | Join Date: Mar 2001 Location: santa maria,california | | Quote:
Originally Posted by joelb79  PCBs for DIY clone 2-band Preamps
Your solution is here.  "and wire a 25k resistor from the preamp's output to ground." and use the EMG volume pots, remove the preamp's volume pot.
Edit: just read your post about both EMG volume pots and the preamp. It sounds to me like the pickups might be faulty as they shouldn't be doing this at all.. Have you talked to EMG about the noise using their pots? | i got the pickups on a fri and installed them friday night. i sent an email but theyre closed for the weekend so i hope to get some movement this week. like i said, id love to have this bass running with the emgs since all my old fenders have the stock pickups and this would be a nice change of flavors. |
02-03-2013, 10:41 PM
|  | Registered User | | Join Date: Mar 2006 Location: Lansing, Michigan | | | What else is in your signal chain? EMG has been very responsive via Email for me. I hear their phone support is great too.
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Last edited by joelb79 : 02-03-2013 at 10:48 PM.
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02-03-2013, 10:58 PM
| | Registered User | | Join Date: Mar 2001 Location: santa maria,california | | Quote:
Originally Posted by joelb79 What else is in your signal chain? EMG has been very responsive via Email for me. I hear their phone support is great too. | nothing. im pretty simple. going into an epifani quest pre/stewart 2.1. the bass was going nuts plugged into the guitar amps i teach through at the shop i work at as well. |
02-03-2013, 11:00 PM
| | Registered User | | Join Date: Mar 2006 Location: Lansing, Michigan | | http://www.jemsite.com/forums/showpo...8&postcount=11
I just read that faulty pots can cause this issue. Lemme ask, plug in pots or solder on ones?
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02-03-2013, 11:02 PM
| | Registered User | | Join Date: Mar 2006 Location: Lansing, Michigan | | | another odd test, power the preamp with one battery, power the pickups with another. Does that clear up the issue? Low battery power seems to potentially cause noise problems with EMG Pickups, but I'm leaning this is not the case.
To test, maybe measure the voltage when the bass is playing notes and see if the voltage drops?
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"But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal:" Matthew 6:20
Last edited by joelb79 : 02-03-2013 at 11:21 PM.
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02-03-2013, 11:12 PM
| | Registered User | | Join Date: Mar 2001 Location: santa maria,california | | Quote:
Originally Posted by joelb79 | quick connect pots. i think i have some standard 25k pots i could try out.
inspiration for my purchase http://www.youtube.com/watch?v=ag8Hbk_pUeU |
02-03-2013, 11:19 PM
| | Registered User | | Join Date: Mar 2006 Location: Lansing, Michigan | | Quote:
Originally Posted by narud | Looks like he has EMG JX pickups on that bass. Sounds like the X series as well. My EMG J's had some hum pickup, my X's are completely silent. Dunno if you said X's or regular J set are what you have?
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"But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal:" Matthew 6:20
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02-03-2013, 11:29 PM
|  | David Schwab
Owner, SGD Music Products | | Join Date: Aug 2008 Location: Bloomfield, NJ | | | Thats odd. Every EMG I ever had was dead quiet.
The grounds and hot aren't mixed up to the output jack, are they?
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02-03-2013, 11:32 PM
| | Registered User | | Join Date: Mar 2006 Location: Lansing, Michigan | | http://forum.emgpickups.com/viewtopic.php?f=2&t=2598 Read this; not sure if helpful. Check the jack as well? Quote:
Originally Posted by SGD Lutherie Thats odd. Every EMG I ever had was dead quiet.
The grounds and hot aren't mixed up to the output jack, are they? | Hmm... Perhaps Narud? We're both fishing for an answer here, but this could be.
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02-03-2013, 11:38 PM
| | David Schwab
Owner, SGD Music Products | | Join Date: Aug 2008 Location: Bloomfield, NJ | | | Personally I find that solderless system a PITA! I'd check and double check the connections.
__________________ SGD Lutherie Hand crafted pickups and electronics.
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02-04-2013, 07:44 AM
|  | Registered User | | Join Date: Mar 2011 Location: Central FL | | | use a ground lift on your amp. willing to bet its on the amp end and exagerated by the emg's due to the way they are grounded. they should be dead silent. |
02-04-2013, 09:14 AM
| | Registered User | | Join Date: Mar 2001 Location: santa maria,california | | Quote:
Originally Posted by SGD Lutherie Personally I find that solderless system a PITA! I'd check and double check the connections. | i went through last night and pulled the pickups out of the bass to check if everything was wired up right and everything was fine. the only thing im not using is the supplied battery connector (the bass has a battery box) and the buss.
i flipped the connectors around just for the hell of it and of course didnt get a normal sound. with it wired up, moving the pickup around and pointing it towards the amp increased the 60 cycle hum just like when they were in the bass. ugh |
02-04-2013, 01:59 PM
| | Registered User | | Join Date: Mar 2006 Location: Lansing, Michigan | | | one of those white plug in cables coming from the pickup isn't reversed is it? The plugs have tiny slots on them that need to all be facing downward, otherwise ground is hot and hot is ground. that could do it.. and since it would be behind the jack, switching the jack around wouldn't do anything.
Double check connections?
also, did you call EMG- I'd love to hear there was a solution available.
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02-04-2013, 02:23 PM
| | David Schwab
Owner, SGD Music Products | | Join Date: Aug 2008 Location: Bloomfield, NJ | | Quote:
Originally Posted by narud with it wired up, moving the pickup around and pointing it towards the amp increased the 60 cycle hum just like when they were in the bass. ugh | They are both like that? It sounds like they are defective.
__________________ SGD Lutherie Hand crafted pickups and electronics.
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02-04-2013, 02:35 PM
| | Registered User | | Join Date: Mar 2001 Location: santa maria,california | | Quote:
Originally Posted by SGD Lutherie They are both like that? It sounds like they are defective. | yup both like that. so much for my first time buying emg's  |
02-04-2013, 02:37 PM
| | Registered User | | Join Date: Mar 2001 Location: santa maria,california | | Quote:
Originally Posted by joelb79 one of those white plug in cables coming from the pickup isn't reversed is it? The plugs have tiny slots on them that need to all be facing downward, otherwise ground is hot and hot is ground. that could do it.. and since it would be behind the jack, switching the jack around wouldn't do anything.
Double check connections?
also, did you call EMG- I'd love to hear there was a solution available. | i had them plugged in correctly but i flipped everything around just on the odd chance. that didnt work.
i was waiting to see if they emailed me back but ill probably call tomorrow morning since ive got to find out if emg is going to take care of me or if im going to have to return through the shop i bought them from on ebay. |
02-04-2013, 03:59 PM
| | Registered User | | Join Date: Mar 2006 Location: Lansing, Michigan | | | Rats. I've racked my brain on this one for a while.. sorry I couldn't help Narud.
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"But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal:" Matthew 6:20
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02-04-2013, 04:51 PM
| | Registered User | | Join Date: Sep 2006 Location: Tijuana Mex. | | | Does your bass makes that humming sound at other places or is it just at your place?
I ask this because i have used EMG pups in my jazz for 13 years and they make that noise just on certain places. They are noisless 98% of the time but there is always a certain bar or house where the wiring on the electricity makes my bass hum unless i turn the bass around and find the spot where its quiet.
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02-04-2013, 05:52 PM
|  | Registered User | | Join Date: Jan 2010 Location: Ohio | | | Look in the fine print on the diagram.. I had an issue like this and 1 of the wires on the pickup was supposed to be reversed.. I took it took my tech and he found it in small print
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02-04-2013, 06:24 PM
|  | Supporting Member | | Join Date: Jul 2011 Location: Nanaimo, BC, Canada | | | If they're noiseless pickups, it sounds like you may have a grounding issue.
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