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TVI from my laptop PS

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October 1st 08, 03:06 PM posted to rec.radio.amateur.moderated

Bert Hyman Bert Hyman is offline

Bert Hyman is offline

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TVI from my laptop PS

(Bill Horne) wrote in
t:

I'm getting TVI when I connect my laptop to it's charger/PS.
Strangely enough, the TVI doesn't happen when the power supply is
plugged in but not connected to the laptop.

Please pass along your experiences and solutions.

Switching power supplies are notorious RFI generators; sometimes
they'll be clean for years and then go bad, some are bad out of the
box.

They're usually designed so they shut down when there's no load
applied, which would explain why you don't experience any interference
when it's not connected to your PC.

You could try the standard trick of adding chokes to the AC and DC
lines to the supply, but when I've had a PS go bad, I've never had any
luck removing the noise.

Other than that, the only other solution I've found is replacement.

--
Bert Hyman | St. Paul, MN |

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