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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: High frequency explosionsPosted by Bud on: 6/1/2009

Sounds to me like your switch mode transformer is doing the buzzing. I recently purchased an APC product that charged the battery constantly, so long as it was plugged in. This caused quite a bit of heat and stench, from the hot switch mode power supply. It buzzed all the time and when the battery was being charged it buzzed even louder. I complained and they sent me a different unit, same power, different case (tan and narrow rather than black and fat). This one does none of the above, though when charging the battery it does hum slightly. There is always a turn on buzz, but just for about 10 seconds. The original one had a noisy fan also, to keep it from self igniting, perhaps that is your actual problem?. The new one cost more than the old one and they even paid for the freight.

You should ask your tech support guy if there is a replacement for your APS supply that does not run continuously.

Bud

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