Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Login
3 Pages<123>
Low buzz/hum in speakers with no music playing - same
Options
View
Go to last post Go to first unread
Previous Topic Next Topic
JGlacken  
#21 Posted : Saturday, July 14, 2012 8:59:00 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
IEC connector
Back to top
JGlacken  
#22 Posted : Saturday, July 14, 2012 9:07:59 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
I get 0.L when set to ohms.
Back to top
Brian Donegan  
#23 Posted : Sunday, July 15, 2012 1:13:49 AM(UTC)
Brian Donegan

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA

Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
I think that means "overload," which means there is no connectivity (same as when the leads are not connected to anything?).

If that is the case, then we need to look elsewhere for the problem. Did you connect and of the signal or power grounds to the chassis, other than the earth connection from the IEC connector?
Back to top
WWW
JGlacken  
#24 Posted : Sunday, July 15, 2012 2:53:02 AM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
Not that I know Of.
Back to top
JGlacken  
#25 Posted : Sunday, July 15, 2012 2:05:40 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
I also read somewhere that O.L means open loop. Does that mean anything to you guys?
Back to top
Russ White  
#26 Posted : Sunday, July 15, 2012 2:33:22 PM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
Yes, open is what you want. The loop may not be via the chassis. It may be elsewhere - even further down the chain.

if you have a headphone or small 32ohm speaker or something you could drive that directly. Is the noise still there?
Back to top
WWW
JGlacken  
#27 Posted : Sunday, July 15, 2012 3:26:14 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
I have headphones. Where would I put the input plug?
Back to top
JGlacken  
#28 Posted : Monday, July 16, 2012 1:34:15 AM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
What should I do next?
Back to top
Russ White  
#29 Posted : Monday, July 16, 2012 2:31:46 AM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
Wire a jack to the left and right SE outputs and GND if you have one. Then listen with headphones.
Back to top
WWW
JGlacken  
#30 Posted : Monday, July 16, 2012 5:38:35 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
I wired to the SE outputs and attached ear buds and the hum is in both channels.
What's next?
Back to top
avr300  
#31 Posted : Monday, July 16, 2012 8:04:55 PM(UTC)
avr300

Rank: Member

Groups: Member
Joined: 6/17/2008(UTC)
Posts: 921
Denmark

Thanks: 1 times
Was thanked: 70 time(s) in 69 post(s)
Try powering the rig bypassing the IEC inlet filter/connector. Remember a fuse, and remember to stay alive.
Back to top
JGlacken  
#32 Posted : Monday, July 16, 2012 8:09:22 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
avr300,

I am not sure I know how to do this with the fuse and all?
Back to top
avr300  
#33 Posted : Monday, July 16, 2012 8:18:53 PM(UTC)
avr300

Rank: Member

Groups: Member
Joined: 6/17/2008(UTC)
Posts: 921
Denmark

Thanks: 1 times
Was thanked: 70 time(s) in 69 post(s)
ok, don't!

Don't ever mess around with mains unless you know exactly what you're doing.
Back to top
JGlacken  
#34 Posted : Monday, July 16, 2012 8:32:23 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
OK, I'd better not. Thanks for the idea though!
Back to top
avr300  
#35 Posted : Monday, July 16, 2012 8:32:40 PM(UTC)
avr300

Rank: Member

Groups: Member
Joined: 6/17/2008(UTC)
Posts: 921
Denmark

Thanks: 1 times
Was thanked: 70 time(s) in 69 post(s)
I assume that you have a fuse on the mains side toady, perhaps it is in the IEC filter, check that please.

I would have suggested you to disconnect the green GND wire from the IEC, unmount the IEC from the case and run the thing floating relative to protective earth.

That way we will eliminate any external ground loop.


But again, I won't ask you to mess with mains !! Do it if, and only if, you feel confident.
Back to top
JGlacken  
#36 Posted : Monday, July 16, 2012 9:20:27 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
Yes, I have fuses in the iec unit. I disconnected it from the case and the ground wire and placed it on a sponge outside the case. There is still hum in each speaker. I disconnected the source and there is still hum in each speaker.
Back to top
JGlacken  
#37 Posted : Monday, July 16, 2012 9:40:44 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
It would appear I had the black wire in the wrong place on the Ivy 3 and have moved that to the ground position. The hum has reduced but is not gone. Should the iec ground be mounted to the case or not?

Jeff
Back to top
JGlacken  
#38 Posted : Tuesday, July 17, 2012 3:53:57 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
I have reworked the boards and now the hum is very faint, but now the music sounds like I am frying eggs. Major interference. Any thoughts.
Back to top
Brian Donegan  
#39 Posted : Tuesday, July 17, 2012 4:36:06 PM(UTC)
Brian Donegan

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA

Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
Can you post pictures of the IVY, top and bottom?
Back to top
WWW
JGlacken  
#40 Posted : Tuesday, July 17, 2012 7:35:23 PM(UTC)
JGlacken

Rank: Member

Groups: Member
Joined: 1/5/2012(UTC)
Posts: 44
Location: Bluffton, South Carolina

Thanks: 1 times
Pics of Ivy 3
JGlacken attached the following image(s):
DSC_0774.jpg (215kb) downloaded 25 time(s).
DSC_0779.jpg (172kb) downloaded 22 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
Rss Feed  Atom Feed
Users browsing this topic
GuestUser (22)
3 Pages<123>
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Youtube
Copyright © Twisted Pear Audio