On Tue, Mar 31, 2015 at 01:46:40PM -0500, Chris Caudle wrote:
On Tue, March 31, 2015 12:36 pm, Patrick Shirkey
wrote:
That person might not have much money but they
might have the time to
figure out where the buzz comes from and do something productive. Who
knows they might even be able to provide useful feedback to Behringer that
improves their Linux solutions.
Sounds like everything else on the board was working ok so a little bit of
hum should be relatively easy to solve. Maybe it just needs some contact
spray.
That type of problem is indicative of poor circuit reference conductor
routing (colloquially called "ground loop" or "pin 1 problem") and
can
sometimes be improved with judicious use of added wire or copper foil tape
connections, but often requires a new and proper PCB layout to correct.
It is basically just sloppy layout work by the design team.
Right. And in cheap mixers like this one, everything including connectors,
pots and switches will be on a single PCB, and there's no way to change
anything much unless you decide to drill some holes in it.
And BTW, it was not 'a little bit of hum' but a ot of it, and new
equipment should't need contact spray (and it won't help for this
kind of problem either).
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)