Re: [slim] Can a power supply/DAC be causing interference?

2009-05-13 Thread Mick Seymour

dekaliber;422888 Wrote: 
 I guess my main concern now is: could this interference possibly be
 damaging to my SB3 (or worse, more expensive pieces of gear nearby like
 my amp, TV, or speakers)?

It isn't likely to do physical damage to other electronics unless it is
acting like a strong magnet, in which case it could damage a TV tube.
Mentally, having to reset the kit every 5 minutes would be really
damaging.

 Could it also be affecting sound quality as well?  To the last question,
 my sense is no -- to be fair the unit sounds pretty darn good!

If it is throwing out loads of RFI the answer is likely yes. I would
question whether it isn't affecting its own working. Don't forget that
with audio, some distortion or loudness can sound 'pretty darn good' but
will eventually get on your nerves.

Get another unit for evaluation and see if that behaves differently. If
it doesn't, don't buy that model.


-- 
Mick Seymour

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Re: [slim] Can a power supply/DAC be causing interference?

2009-05-12 Thread Mick Seymour

I have known different equipment play all sorts of havoc with other
equipment.

The thing to do is take the DAC out of the loop completely. Unplug it
and tuck it under the sofa out of the way. Unplug and replug the SB. If
it works, it is the DAC or it's power supply causing the problem. You
don't say whether you are using an optical or coax connection. If coax,
it -could- be picking up rubbish that is messing with the SB.

Is the SB running wireless? I have also know equipment disturb wireless
signals intermittently.


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Re: [slim] Can a power supply/DAC be causing interference?

2009-05-12 Thread dekaliber

SB is running wireless, connected to DAC via digital coax and connected
to amp with RCA (I'm doing some A/B tests of the SB DAC and the external
DAC).  I thought coax is almost always preferred over TOSlink?

What's weird is that the Squeezebox seems to connect to my network
fine.  It's just the connection to the actual machine that hosts
Squeezecenter gets hosed.  I would think that if it's interfering with
the wireless, the SB wouldn't even be able to get on the network at all.
Not really sure how that works...


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Re: [slim] Can a power supply/DAC be causing interference?

2009-05-12 Thread Mick Seymour

dekaliber;422771 Wrote: 
 the Squeezebox seems to connect to my network fine.  It's just the
 connection to the actual machine that hosts Squeezecenter gets hosed.

Maybe the DAC is screwing with the laptop. As I said, take it
temporarily out of the loop.


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Re: [slim] Can a power supply/DAC be causing interference?

2009-05-12 Thread dekaliber

Squeezecenter is actually running from a computer in another room (where
the router is).  The laptop isn't really part of the equation, but it
seems unaffected connectivity-wise regardless.

Yesterday I unplugged the DAC/power supply entirely from my system --
AC power, RCA, digital coax, everything -- but the SB still had trouble
connecting.  However, once I unplugged the power on the Squeezebox and
plugged it back in, it started working again.  Not sure what the reset
may have done from a hardware perspective, though.


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Re: [slim] Can a power supply/DAC be causing interference?

2009-05-12 Thread Millwood

Just because your SB can associate with the wireless AP doesn't mean
that many packets are getting through.  IMHO, the SB/SC protocols were
never very robust in the face of significant packet loss.

Also remember that the power supply for the new stuff might be the
culprit, particularly if its an external brick.  Cheap switching
supplies are notorious radiators of interference.  So when you unplug
make sure you unplug at the outlet.


-- 
Millwood

2 SB3, 1 Duet
Debian Etch server
2 AP (netgear, linksys) wireless network.

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Re: [slim] Can a power supply/DAC be causing interference?

2009-05-12 Thread Phil Leigh

Millwood;422786 Wrote: 
 Just because your SB can associate with the wireless AP doesn't mean
 that many packets are getting through.  IMHO, the SB/SC protocols were
 never very robust in the face of significant packet loss.
 
 Also remember that the power supply for the new stuff might be the
 culprit, particularly if its an external brick.  Cheap switching
 supplies are notorious radiators of interference.  So when you unplug
 make sure you unplug at the outlet.

? - TCP/IP (and therefore the Internet) is not very robust in the face
of significant packet loss - what is?

SC+SB3 is extremely resilient to moderate packet loss IMHO.

I Agree with your second point.


-- 
Phil Leigh

You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...
SB3 (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF
Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x
LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue
Jeans Digital,Kimber Speaker  Chord Interconnect cables
Outdoors: Boom

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Re: [slim] Can a power supply/DAC be causing interference?

2009-05-12 Thread dekaliber

After experimenting some more I found conclusively that the VAC-1 is the
guilty component.  It sits above the SB3 on my TV stand, which
incidentally puts it more or less in between the SB and my router.

I was able to move the VAC-1 back and forth on my TV stand to get 100%
repeatable results.  If I move it forward so that it's in front of the
SB, no problems.  If I move it backwards so that it's on top of or
slightly behind the SB, the remote becomes unresponsive, and the
connection drops seconds later.  Moving it forward again, the connection
resumes instantly.

I will reconnect things so that the Squeezebox is above the CI units
tomorrow, which is probably the much more common and logical setup, and
see what happens.  I suspect it will probably be fine.  The CI units are
only where they are while I audition them.

I have no idea if the VAC is a switching power supply -- how would I
tell?

I guess my main concern now is: could this interference possibly be
damaging to my SB3 (or worse, more expensive pieces of gear nearby like
my amp, TV, or speakers)?  Could it also be affecting sound quality as
well?  To the last question, my sense is no -- to be fair the unit
sounds pretty darn good!


-- 
dekaliber

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