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Rega hum

Rotel RC-1090 pre
Rotel RB-1092 amp
Rega P5, TT PSU, Exact cartridge.

Noticed this weekend an annoying hum in the background especially with nothing playing on the TT and volume up. What do I need to do to rid this hum? I realize Regas are grounded internally. BTW, table is completely stock. All equipment is plugged into a Rotel RC-1040 power conditioner. Thanks for all suggestion.
miner42
swampwalker's avatar
swampwalker
5,138 posts
 
If you have recently added a cable TV/coax connection somewhere in the house, try disconnecting it. If that fixes it you need a ground isolation transformer at the coax line.
miner42 OP
709 posts
 
No, not added recently (8 yrs ago it was added). I have had the TT now for 1 yr and this was this first issue (other than location issue when firt purchased) I have had with hum. I am looking for a dead silent background. Hum does not occur with any other sources (CD & iPod).
swampwalker's avatar
swampwalker
5,138 posts
 
By grounded internally, do you mean via the interconnect and/or power cord? If so, try a cheater plug and also check the RCAs to make sure they are not loose or otherwise not making a good connection = ground. If neither of those work, I would try an external ground to a screw or post on your pre.
overhang
199 posts
 
line the bottom of tt with aluminum foil
Ag insider logo xs@2x
jgiacalo
446 posts
 
Do you have a lamp or other non-audio electrical device turned on nearby? My P25 only hum when I turn on the nearby lamp (not on the same circuit) to change records.

Just a thought.
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