[LAU] sortof OT -- ART tube pac preamp and compressor noisy?

James Stone jamesmstone at gmail.com
Mon Aug 12 17:32:00 UTC 2013

On Aug 12, 2013 4:05 PM, "Rusty Perez" <rustys.lists at gmail.com> wrote:
> Hi folks,
> This is related to recording, and my recordings are made on linux, so,
> it is tangential to all of these lists. :-)
> I own an ART tube pac, which is a preamp compressor combo unit.
> It is the first generation of this unit I believe. I've just started
> using this unit.
> Anyway, I'm hearing a low level hum, sortof like a grounding hum.
> Does anyone else use the ART line of pres? Has anyone had trouble with
> The unit uses 2 tubes and I'm sure they aren't high quality tubes.
> Could a lower quality tube cause a low level ground hum?
> The unit has a grounded plug, and I can't seem to get rid of the hum
> by unplugging other components, but when I mute the unit through my
> sound card, the hum is decreased.  The hum is audible in silences on
> my tracks, so I know it's not just my playback system.

Just another easy to test idea - how about moving the unit and the
connectors around the room a bit? I get horrendous hum on my guitar amp if
it picks up rf interference. .. move away from fluorescent lights, dimmer
switches, monitors etc..

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