Help I got a big time Hum in my system

Try disconnecting the tv-cable and unplugging the tv. If this eliminate your hum, then you can fix this cable ground loop hum several ways without costing you any money.

Either ensure that all grounds to all components are using the same ground and/or circuit.

Or disconnect the ground (for safety sake many will discourage doing this) at all outlets for your tv and audio components.

Check what Herman says above....most cable TV feeds into your home will ground the cable to the same earth ground(pipe) that the AC input to your home is grounded to. Many cable TV feeds have serious DC voltage on the ground, and thus my be placing a DC voltage on the ground pin of all of your homes AC plugs...causing hum/noise on your system...let alone reducing the overall capibility of your components.

I replaced a cheap power strip with an american power conversion unit. Hum from amplifier went away as did my problem with blowing 6A fuses.

There are quite a few threads that deal with this issue and take you through a step by step diagnosis to help isolate the cause. You may want to do a search on 'hum'.

I would first disconnect the tv cable and see if there is any change. If the hum goes away or is diminished then you need to isolate the cable tv ground from your system. A cheap and very effective way to do this is to buy a 75ohm to 300ohm cable converter and a 300ohm to 75ohm cable converter. Chain them together (75ohm->300ohm => 300ohm->75ohm) and hook up the 75ohm connection of the 300ohm to 75ohm converter to your tv or cable box. Hook your cable tv up to the 75ohm input of the 75ohm to 300ohm converter. These parts can be bought at RS for around 6$.

Just one other note, I briefly owned a Parasound 2003, and currently own a Parasound 2205. I've had serious ground loop hum problems with both amps and have resorted to lifting the ground in each case. Good luck.

If you haven't figured this out yet... I noticed you said the equipment is on "circuits". This being the case, you may want to temporarily connect everything piece by piece into a single outlet (single circuit). This can be accomplished by using a cheap power strip, 6 into 2 outlet adapter, etc. Sometimes if you have 2 circuits, the grounds are tied at the breaker panel, which can create a ground circuit loop the length of 2 wiring runs to the breaker panel. If you find this is the issue, you may have to connect the grounds at the outlets to get a common ground point for your stereo.

The other excellent points above are to search on Hum, or remove any connections to cable TV for TS purposes. You may also mail me with questions, as I know HUM problems pretty well...