From Experience since Both work alone, its probally the Grounds are Different. One may be a Hot Ground or a Floating Ground, or not Grounded at all. a Isolated
Message 1 of 1
, Nov 29, 2003
From Experience since Both work alone,
its probally the Grounds are Different. One may be a Hot Ground or a Floating
Ground, or not Grounded at all. a Isolated a/b switch may have to be used. The
Output Signals/Grounds May not Mix together/be compatible. One may Load
another!... I Tried! Jack at my new website... http://www.ElectronicNow.com
I'm trying to troubleshoot what I think is a
ground loop hum problem associated with my audio system. Let me give a
I wanted to route all my audio signals through
my main amp via the AUX input, so I got a 3-way switching box for all the
RCA plugs (3 input - 1 output) and connected signals from my
computer, the VCR and the TV.
60 Hz hum. Not loud, like full
current, but really annoying.
Although I have yet to isolate the
problem, I know that whenever I connect both my computer and my TV audio
to the stereo, I have hum.
My VHF antenna is well grounded (8' rod)
and all appliances (TV, stereo, VCR and computer) are routed through the
same Panamax Surge protector - common power source.
There is no hum
problem if I connect EITHER the computer or the TV, but there is with BOTH
I took some resistance readings, here's the
Between safety ground and VHF coax ground - less than 1
Between safety ground and broadband cable ground - 1.5 to 2