it. A friend told me Gateways were notorious for having poor power transformers. In others' experience, would it be worthwhile to replace the power transformer? What's the identifying information on the transformer (so I know what to ask for at a shop)?...

it? Have you replaced the opamps (TL072 i think)? Are the socketed or soldered to the board? what replacements did you use? have you tried upgrading the PSU? how about the "Audio Upgrades" mod? anyone tried this? they charge $150 per channel to "replace...

properly service your amplifier. The buzzing in the transformer is most likely due to some of the windings loosening up with age. They would normally replace the power transformer to fix this type of fault. -- JANA _____ wrote in message...

power supplies with their own power transformer. So does my USB2 speakers, my printer, scanner etc. I now have 6 transformers sitting under my PC's table. Is there any sort of sensible power supply board which can replace this nonsense? -- Thanks...

interconnects, this means that the main filter caps in the power supply have to be changed. One test is to disconnect all the interconnects, and see if there is still hum. If so, get the unit serviced. The power transformer in the unit is most likely...

to power supply and she gave me the transformer that she had been running it off for the past 7 years or so. Surprise surprise - it's a 240V to 115V transformer, and she said the Akai always worked fine despite being labelled 100V. In other words, she'd...

ignore it. condenser mics are the ones that want phantom power. so mixers are often made have the ability to deliver phantom power. some mixers have a global phantom power, where a switch will provide phantom power to all mic channels, or none. others...

rather slow slew rate op-amps, and I was considering replacing them with >>OP275 op amps or equivalent. >> If you replace 'em with faster op amps of any sort, take care to check > and perhaps upgrade the op amp power-supply bypassing arrangment, and > do...

to resolve the > problem are welcome! Sounds like the ac connector from the power transformer to the PSU pcb has oxidsed / corroded contacts that are high resistance and therfore overheating. You need to *replace* the connector ( either with a new...

Two diodes will be conducting and two will be gone when you consider the cases of the power transformer being "positive" or "negative". You should be able to satisfy yourself that, while the "other side" of the transformer is never actually "grounded", it...