60 hz strikes again

To many ads? Support ODJT and see no ads!
S

So Cal Hugh

Mac Daddy DJ
Mar 8, 2008
3,111
308
62
Cheyenne, WY
www.anewsong.com
I provide the audio for my (very small) chruch. I use my Bose L1s for this - actually just one - with no problems. This last week, for the first time, I had the 60 hz cycle noise. I used the same set up, in the same outlets. I just couldn't get it to go away.

Any ideas?
 
Pick up a ground loop isolator. ;) I keep a couple in my 'kit' that I take with me to EVERY event.

There are a couple other ways to make this work too - DI boxes often include a ground lift switch or provide it natively.

EbTech makes a line of Ground Lift devices.

For RCA inputs/outputs the Radio Shack Ground Loop Isolators work great. I have 3-4 of them I kept on my karaoke players (I always get ground hum when hooking into a 'house' video system at a bar).
 
Yeah, better to get to the root of the problem (probably audio/video/lighting on the same leg of power), but if the client doesn't want to do that, what can you do?

Mike
 
Hugh:

Has there been any construction work done in your church? If wiring was replaced or upgraded recently they may not have properly grounded the boxes.
 
TommyO said:
Hugh:

Has there been any construction work done in your church? If wiring was replaced or upgraded recently they may not have properly grounded the boxes.
Click to expand...

No. Although the pool outside has been uncovered and is being repaired. We meet at a community club house. That could be it?
 
So Cal Hugh said:
No. Although the pool outside has been uncovered and is being repaired. We meet at a community club house. That could be it?
Click to expand...

Quite possible. Does the community club house share any wiring with the pool? When did the repairs begin?
 
The pool could be it, or they may have turned on a compressor, freezer, motor, etc.. that maybe wasn't on before. If they are running lighting off of a dimmer pack you may have SCR hash... a few options. I like the Rolls Buzz-Off to solve problems like this in a pinch (and we sell a lot of them, probably for that reason). It won't get rid of all problems, but it sure takes care of most.

Ben
 
Doug said:
Ben

Would something like this work good?
http://www.zzounds.com/item--EBTHUMX

I have never had a hum before that the little hum switch on my EV's didn't fix, but now I am starting to worry. My Peaveys don't have that little switch.
Click to expand...

I recommend the EbTech products... I have some and like them alot. I've toyed with the idea of putting one in my rack just in case.
 
Update:

Today the buzz was back in the sound at church. I went around and looked at everything I could think of. Then I noticed some accent lights that were on the ceiling line, pointing up for effect. I turned them off and the buzz stopped immediately.

Issue solved.

Thanks for the input everyone.
 
You must log in or register to reply here.
Top Bottom
Back