Speakerplans.com Homepage
Forum Home Forum Home > General > General Forum
  New Posts New Posts RSS Feed - Strange interference
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Strange interference
 Post Reply Post Reply Page  12>
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
msoundsystem View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 November 2011
Location: wales
Status: Offline
Points: 625 		Post Options Post Options   Thanks (0) Thanks(0)   Quote msoundsystem Quote  Post ReplyReply Direct Link To This Post Topic: Strange interference
    Posted: 08 May 2020 at 12:23pm
I have a really strange issue i know its interference but whats causing it? I have a dbmark dp28 processor and a rane pe15.  When the rane pe15 eq is placed under the dbmark in the rack there is awful interference like radio static. When moved 3u down from the db mark it goes away. Is it possible the two power supplys are interfering? Anyway to solve it? Thanks 
Back to Top
Earplug View Drop Down
Old Croc
Old Croc


Joined: 03 January 2012
Location: Europe
Status: Offline
Points: 7216 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 12:34pm
Yes - I´ve had some strange inteference with wireless mic receivers stacked in a rack, but your problem most probably comes from a badly shielded switch mode PSU. Or an earthing problem with said PSU.

First thing is maybe to open up the units and check the supplies. See if there´s anything obvious, ie missing earth screw somewhere.
Earplugs Are For Wimps!
Back to Top
msoundsystem View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 November 2011
Location: wales
Status: Offline
Points: 625 		Post Options Post Options   Thanks (0) Thanks(0)   Quote msoundsystem Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 12:39pm
Cheers, already done that,  on the pe15 the caps look and measure fine. Solder joints clean and  the db mark is only 2 years old.. not a massive issue but annoying. 
Back to Top
Earplug View Drop Down
Old Croc
Old Croc


Joined: 03 January 2012
Location: Europe
Status: Offline
Points: 7216 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 12:57pm
Ok. Have you tried some aluminium foil?






May help if placed around the circuit boards!   LOL
Earplugs Are For Wimps!
Back to Top
msoundsystem View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 November 2011
Location: wales
Status: Offline
Points: 625 		Post Options Post Options   Thanks (0) Thanks(0)   Quote msoundsystem Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 4:50pm
Will possibly look at extra shielding. Anything better than tin foil?? Any other tricks?? 
Back to Top
Earplug View Drop Down
Old Croc
Old Croc


Joined: 03 January 2012
Location: Europe
Status: Offline
Points: 7216 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 6:00pm
Faraday cage?   Smile
Earplugs Are For Wimps!
Back to Top
cravings View Drop Down
Old Croc
Old Croc
Avatar

Joined: 30 January 2007
Location: Ireland
Status: Offline
Points: 7442 		Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 6:20pm
Isn't the power supply for those ranes external?
Back to Top
msoundsystem View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 November 2011
Location: wales
Status: Offline
Points: 625 		Post Options Post Options   Thanks (0) Thanks(0)   Quote msoundsystem Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 6:27pm
Yes it is, but moving the power supply does nothing. Moving the unit does.. 

Edited by msoundsystem - 08 May 2020 at 6:27pm
Back to Top
dj jammin View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 April 2010
Location: southampton
Status: Offline
Points: 770 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dj jammin Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 10:24pm
Possibly the case is not grounded if its an external psu.. can you check this? Might help if not.. Actually I just had a quick look on google and it appears the pe15 has a ground lift switch.. have you tried switching this?
Reverence Sound system
Back to Top
dj jammin View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 April 2010
Location: southampton
Status: Offline
Points: 770 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dj jammin Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 10:31pm
Also just noticed the pe15 has an earth connection on the back.. could be as simple as linking  both devices chassis together.. might be worth a try..
Reverence Sound system
Back to Top
msoundsystem View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 November 2011
Location: wales
Status: Offline
Points: 625 		Post Options Post Options   Thanks (0) Thanks(0)   Quote msoundsystem Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2020 at 10:31pm
It has a external ground screw on the case at the back but it doesent have a ground lift switch anywhere... maby grounding the processor and pe15 together via the cases may work. Will try that tomorrow.. 
Back to Top
dj jammin View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 April 2010
Location: southampton
Status: Offline
Points: 770 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dj jammin Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2020 at 11:42am
Did you solve the problem?
Reverence Sound system
Back to Top
 Post Reply Post Reply Page  12>

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.234 seconds.