Just wanted to share with you - as I own NAD T773 unit and had many issues with it, I moved back to Europe and converted it from 110v to 220v and "suddenly" all humm and hiss noise were disappeared. Not sure why, but now I enjoy the system...
I'll keep that in mind next time I go overseas. Is there a 110v/220v switch on the back, or did you have to get an electrician to open it up and convert it?
Some of you folks may have a 220V outlet in your house. Some of the washer/dryer units and some electric ranges use 220. That is if the conversion is easy enough as Edster asked.
The conversion is done at the power in with a reversable plug, or switch. This converts 220-230 to 110-120, through a simple conversion, not involving the sound circuits at all, I believe.
I cannot see it being of much difference here, but, of course, Im not there, either.
Most pieces of equipment have this voltage switch, bringing 230 to 110 via a XO rated to max power, built into the power supply with a tap.
Gvenk
Unregistered guest
Posted on
Could it be the change from 60hz to 50hz in the power be a possible explanation rather than the voltage?
Just a theory... assuming the hum/hiss problem is with some kind of shielding/resonance issue related to the power supply and affected by the frequency.
All North America is 60 Hz, either 120 or 230v. Overseas is 50cycle.
Daniel Benatar
Unregistered guest
Posted on
I have asked the technician, and my understanding is that the he just re connected the wire at the back of the receiver at the transformator as this transformator support 110v/60Hz and 220v/50Hz.
I'm from Portugal, we use 220 and I have the same issue (hum/hiss) on my 763 so it's not related to the voltage... I guess that while he changed that he also changed something else (a filter maybe). Perhaps their policy is not to make the solution public in order not to have everyone comming in with the units...
I'm still having that love/hate relationship with my 773! buzzzzz...