EMG jazz pickups and 60 cycle hum

[narud]

Originally Posted by Rano Bass

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.

its been like this at both places ive tried it.

[narud]

Originally Posted by Denny Coon

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

im not seeing any fine print in the diagrams

[narud]

Originally Posted by joelb79

Rats. I've racked my brain on this one for a while.. sorry I couldn't help Narud.

thanks for trying man! ill be calling emg in the morning because i never got an email back.

[Rano Bass]

Keep us updated man, good luck.

[Denny Coon]

Look at diagram 5 on this link. Its worth a try anyway! Hope this fixes ya..http://www.emgpickups.com/content/wi...0230-0127A.pdf

[narud]

Originally Posted by Denny Coon

Look at diagram 5 on this link. Its worth a try anyway! Hope this fixes ya..http://www.emgpickups.com/content/wi...0230-0127A.pdf

that diagram has that wire reversed in order to get the blend pot working. im not using a blend, im using 2 volumes. thanks for looking out though! im about to call emg in a little while when they open.

[narud]

so emg had zilch for me over the phone. i got "sometimes if something is touching a ground in the cavity it can cause hum". ive got the pickups pulled out of the bass and still am getting hum. looks like theyre going back so they can put them on a scope.

[joelb79]

The X series seem to be noiseless where my non-X's were not. FWIW.

[narud]

Originally Posted by joelb79

The X series seem to be noiseless where my non-X's were not. FWIW.

well hell, how is it that emg's are known as noiseless pickups then?

[BruceWane]

Every EMG I've ever had - J's, 40P5, 40J, and 40DC - has been dead quiet. Haven't tried an X series yet.

[joelb79]

Originally Posted by narud

well hell, how is it that emg's are known as noiseless pickups then?

Well.. I'm just saying that in this one particular room where I would have to face a certain angle to not have a slight hum with EMG J-Set, the JX's are completely silent without having to angle my bass a certain way.

I almost wonder if the output impedance of the pickups is the issue, since the X's have 2k ohm output impedance and the J's have 10k ohm. I remember the High-Z mode on my audere was noisy the same room, but using mid or Low-z was noiseless. Perhaps your amp impedance is causing some noise injection with these pickups or something. Just a tiny thought I've been thinking in my head...

[grendle]

thats wierd. been using emg's for 20+ yrs. never had an issue and their always dead silent. you actually hooked them up un mounted to the bass and they were noisy? something very wrong there. they have been 100% reliable for myself and a lot of people. actually never heard of anyone getting a bad set ( not saying you didnt). keep us informed. any additional shielding on that bass? you shouldnt need it with emg's. did you try the ground lift on the amp as well as a different instrument cable?

[narud]

Originally Posted by grendle

thats wierd. been using emg's for 20+ yrs. never had an issue and their always dead silent. you actually hooked them up un mounted to the bass and they were noisy? something very wrong there. they have been 100% reliable for myself and a lot of people. actually never heard of anyone getting a bad set ( not saying you didnt). keep us informed. any additional shielding on that bass? you shouldnt need it with emg's. did you try the ground lift on the amp as well as a different instrument cable?

yup, i took both pickups out of bass and pointing them at the amp made the 60 cycle hum considerably louder. tried everything other than a ground lift as the ground lift on the preamp is only for the di out.

[Stone Soup]

Ever get an answer to your problem?

[narud]

i sent them into emg on wednesday so im hoping to hear something this week!

[narud]

well, the landed at tech support and they were humming so a new set is on the way. they didnt know what it was but said it didnt sound like the internal grounding was bad. who knows?