Hi Doug,
Following on Matt's suggestions, I would agree that the oscillator
section could be suspect. I would also check that all of the logic chips
are well seated and that their leads and sockets look good. Replace them
if they don't. Also make sure that all of the ground connections,
including mechanical connections to the front panel (pots, switches
etc.) are clean and tight. It is unlikely that the Aux sends are
creating this noise, but more likely they are amplifying noise that's
coming from something common to them, again as Matt said. I am away from
the shop for a couple of weeks so I don't have access to my Elan
drawings to give you specific chip names, locations etc.
Best,
Ike
On 11-07-18 8:54 AM, Matt Syson wrote:
Hi
You are looking for something 'common' as it adds up when listening to
more stuff on Solo.
It could be supply noise (check with an oscilloscope) or a module
which is seriously noisy or even talkback or slate tone circuitry that
has access to aux busses although may be nominally 'switched off'.
Double check all possible outputs and look for any 'common' circuitry
(the 'block diagram' should get you close). Ultimately, pull modules
or 'break up' the mix bussing if it is available on plugs.
Matt S
On 18/07/2011 13:35, [email protected]
<mailto:[email protected]> wrote:
Hello, I think this is the way to post here.
I have a 15 year old 40 channel Elan I bought new. It's been very
reliable. It was in a fire 7 years ago. I got it back in commission
after a couple of idle years of storage and cleaning/repairing. It
was recommissioned and has done pretty well, everything works except
some partially working l.e.d. meters.
Lately the master section has a small ripply sound when cranked all
the way up without channels turned on. Small annoyance, but
irritating. However when you solo the auxes you get a really intense
version of hiss noise ripply trash, sounds like a combination of
computer interference meets bad caps/junk. As I said it's appeared of
the last few months. Soloing A,B,1,2,3,4, just adds to the crap
incrementally. When using the track busses to pro tools, it's fine ,
goes to pro tools good and quietly.
I recently tested and or replaced all the resistors in the power
supply and recapped the power supply. I also disconnected the Elcos
for everthing except the monitor one to the amps to make sure it
wasn't from another piece of gear.
I still have the trashy sound in auxes. Any suggestions? Any logical
procedure to locate the source of my noise?
thanks , doug
--
Ike Zimbel,
Zimbel Audio Productions Ltd.
Toronto
416-720-0887
"Studio House Calls". Authorized Warranty service for Allen& Heath, Clear-Com,
Drawmer, Soundcraft, SPL and Yamaha. Repairs and upgrades to analog audio equipment
including: AMEK, dbx, Neve, Neotek, MCI, Soundcraft and more. Ask about our RF frequency
co-ordination services!
www.zimbelaudio.com
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