Power supply -- Importance of amp Rating?? Hello all: I have a TV tuner that requires a DC 7.5 volt, 500 ma power supply. I have a 110 V input power supply rated at 7.5 V DC 1,000 ma. Can I safely use this powersupply with the tuner. Analogy: I can plug a 3.5 am vacuum cleaner into a 15 amp circuit and know that on this 110V A/C circuit, the amperage means that you cannnot simultanously plug in devices collectively drawing more than 15 amps. Likewise, can I safely plug in a 7.5 v 500 ma device into a 7.5 v 1000 ma circuit, and not risk eventual burn-out? An electrician tokld me the tuner would eventually burn out, although it is running fine now. Is he right?