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Author Topic: RFI-resistant computer speakers  (Read 4183 times)
K3AN
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Posts: 787




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« on: August 18, 2011, 06:48:49 AM »

My old computer speakers were horribly susceptible to RF from my radio and I could even hear a nearby ham (1.5 Kw output, 100 yards away) faintly from the speakers. When the volume control finally became too intermittent, I bought a new set. This one has a wall wart with low voltage AC output (it's just a transformer), with the rectification and filtering done in the "master" speaker. There's no rfi whatsoever, and no hash from a switching power supply.

These are $15 Kinyo speakers from Big Lots.
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NO9E
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Posts: 882




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« Reply #1 on: August 23, 2011, 06:49:00 AM »

Now on sale for $7. At my QTH they are more sensitive to RF than other amplified speakers I tried. Perhaps there are two types of Kinyo speakers at Big Lots...
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KF7CG
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Posts: 1213




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« Reply #2 on: August 23, 2011, 10:51:45 AM »

Considering the Big Lots generally handles discontinued, overstock, distressed, and other sold at less than manufacturing cost items; I would expect them to have all manufacturing dates and locations of the same item if such were possible from the manufacturer.

In other words. Shopping results from Big Lots may not be repeatable.

KF7CG
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