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Can't tell,if my house is properly grounded

Hey guys, I have a low level hi/low buzz that is coming through my speakers, not dependent on the integrated tube amps volume. It is amplified when I turn on my Parasound JC3+ Phono preamp, but only slightly. I have the power cords going to the same outlet. I tried running their power through my Furman Elite Power conditioner but that changed nothing. I ran an independent ground wire and checked all the components in various configurations to no avail. I disconnected all the tv cable to make sure it wasn't coming from there and that solved nothing either. I turned off everything in the house I could' no change. I checked my ground outside at the rod and it is all solidly connected, however the depth of the rod is unknown.

any other thoughts before I call out an electrician?
last_lemming
jea48
2,944 posts
 
last_lemming said:

HOWEVER - I disconnected everything but the amp (and speakers) no noise.

I plugged in in the phono pre into the same wall outlet as the amp - no noise.

i connected the RCA connects to the amp from the phono preamp- NOISE!

Try not connecting the TT phono cables to the input RCA jacks on the phono preamp. Check for hum/buzz.
Still have the hum/buzz?

What TT are you using? Cartridge?

gdhal's avatar
gdhal
1,641 posts
 
i connected the RCA connects to the amp from the phono preamp- NOISE!
That could very easily mean you have a defective RCA cable. Swap the RCA cable with a known good one that is shielded. 
last_lemming OP
407 posts
 

What TT are you using? Cartridge?

I have a Dynavector 20x2L, and the cables are Cardas Clear Light.  They have never given me trouble before.  I don' t know if this matters but the noise is coming from both speakers, but I assume if one cable was bad then that noise would affect both, but I really don't know.


I will try swapping out cables tonight to see if that helps.

erik_squires
5,268 posts
 
Blowing a fuse is not at all a good sign. I would now suggest you take the  pre to be serviced.

Best,

E
last_lemming OP
407 posts
 
I replaced the fuse and it plays fine. 
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