SSE hissing problem.

[Art M]

Sparks generate Very wideband RF signals easily showing symptoms on many pieces of equipment.

 

[mudchute]

Its definately not the mains, its a brand new house and the same happened in the previous victorian era house we occupied. The bit that concerns me is that it only happens with the amp on and after its been on a while.

 

[bobrown14]

Try a new power strip, and add the X2 cap to your mains in on the amp to protect your audio gear. New house doesn't mean good wiring, just means new f'd-up wiring. Since this was happening with your old home and now the new home, you brought the culprit with you. Probably not the amp. Try a NEW power strip, pretty easy there. I'd not have my tv on that same house circuit - could be the power supply in the TV getting ready to take a crap. The power supply in TVs are "switched" and they generate a lot of line noise which is why I suggested a X2 cap inside the amp to rid that off the mains voltage going into your amp. The TV is probably the culprit - just unplug it (psu on the TV is on all the time even tho the TV is off) - unplugging the TV should give you relief.

Cheers,
Bob

 

[mudchute]

I hate to say it but I replaced the at7 again and the whoosh/hiss noise has gone. I've since just left it well alone and just enjoyed it.