I am using Total recorder

On my upstairs system when recording from LP all was fine

On my downstairs system I get a noise. I checked the cable I made -
when the ground (RCA outer) is disconnected the buzz gets worse.

I'm sure I have some kind of conflict. I am recording from my cable
service. I tried coming out of my receivers tape out directly -
bypassing the EQ - DBX etc and I have the same noise

Maybe I have to run straight out of the TV? (I use the TV out for cable
audio instead of the cable box so I can control the volume with the TV
remote)

"MD" wrote ...
I am using Total recorder

On my upstairs system when recording from LP all was fine

On my downstairs system I get a noise. I checked the cable I made -
when the ground (RCA outer) is disconnected the buzz gets worse.

I'm sure I have some kind of conflict. I am recording from my cable
service.

Try disconecting the TV cable from your set-top box
and see if the hum/buzz goes away. Ground loops from
TV cable systems are pretty common. Isolation transformers
for the TV cable are available to fix the problem.

Scott Dorsey wrote:
MD wrote:

I am using Total recorder

On my upstairs system when recording from LP all was fine

On my downstairs system I get a noise. I checked the cable I made -
when the ground (RCA outer) is disconnected the buzz gets worse.


You have a ground loop. There is a discussion of ground loops in the FAQ.


I'm sure I have some kind of conflict. I am recording from my cable
service. I tried coming out of my receivers tape out directly -
bypassing the EQ - DBX etc and I have the same noise

Maybe I have to run straight out of the TV? (I use the TV out for cable
audio instead of the cable box so I can control the volume with the TV
remote)


Almost certainly if you have a cable TV system installed, you have trash
coming in on the cable ground. Disconnect the cable and see what happens.
--scott
Thanks

I thought of this but dismissed it because the noise doesn't exist
anywhere else. I have a tape deck and VCR in the same system and there
is no noise. This must mean the stereo/TV system doesn't have competing
grounds but my PC does? Wouldn't that mean the PC input jack doesn't
slave the ground like units with RCA jacks do? (Assuming there is no
competing ground like the third prong on power cables)

MD wrote:
I am using Total recorder

On my upstairs system when recording from LP all was fine

On my downstairs system I get a noise. I checked the cable I made -
when the ground (RCA outer) is disconnected the buzz gets worse.

You have a ground loop. There is a discussion of ground loops in the FAQ.

I'm sure I have some kind of conflict. I am recording from my cable
service. I tried coming out of my receivers tape out directly -
bypassing the EQ - DBX etc and I have the same noise

Maybe I have to run straight out of the TV? (I use the TV out for cable
audio instead of the cable box so I can control the volume with the TV
remote)

Almost certainly if you have a cable TV system installed, you have trash
coming in on the cable ground. Disconnect the cable and see what happens.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."