Kingston
Well-known member
[quote author="Freddy G"]hi kingston,
ok, i measured like you said and when i do a freq analysis, 60 hz is sitting at -103.9 db, 120hz at -122.4db, 180hz at -109.3db and then all the higher harmonics just get progressively quieter.
Freddy :sam:[/quote]
Thanks for that bit. My noise levels are about equal to that with low gains, but max gain takes it up about 20dB at the 50hz ground peak (still acceptable in my book).
I had to move the PSU transformer out of the rack to achieve that.
ok, i measured like you said and when i do a freq analysis, 60 hz is sitting at -103.9 db, 120hz at -122.4db, 180hz at -109.3db and then all the higher harmonics just get progressively quieter.
Freddy :sam:[/quote]
Thanks for that bit. My noise levels are about equal to that with low gains, but max gain takes it up about 20dB at the 50hz ground peak (still acceptable in my book).
I had to move the PSU transformer out of the rack to achieve that.
