FW: [sdiy] Noisy Power Supply

[Needham, Alan]

OOPS - just realised what you mean with pos, neg and ground ---
+/-15 v rails, each with seperate smoothing caps !
      (still can't find data on this supply -their website is hopeless!)
Right, so you can compare their charge time or swap caps, one for the
other - see if fault follows cap!

	Alan - I don't get out much !

# -----Original Message-----
# From: Needham, Alan 
# Sent: 21 June 2007 5:08 PM
# To: synth-diy at dropmix.xs4all.nl
# Subject: RE: [sdiy] Noisy Power Supply
#
#
# Scott,
#  
# You say you have the scope ref. connected to supply ground...
# is that the mains earth ? is earth connected to anywhere else on the synth?
# (either PSU pos or neg or via a cable to an amplifier ?)
# You seem to be describing symptoms of poor smoothing AND the positive rail
# being earthed (so no signal seen there, relative to earth).
# What do you see across the power rails (neg to pos)?
#     blah blah blah ...

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