[R-390] Power Cords on eBay
Roy Morgan
roy.morgan at nist.gov
Thu Oct 6 09:37:35 EDT 2005
At 12:50 AM 10/6/2005, John Lawson wrote:
> If your radio is tripping the GFI with the ground pin active, then I'd
> hazard a guess that the line filter unit inside has developed a leaky
> capacitor,
Not likely (Though they ARE paper caps in there). The line bypass caps are
simply acting like capacitors and are not necessarily leaking.
>or other high-resistance leakage path to ground, which of course will
>upset and trip your protection circuits - it's (the GFI device, he means)
>actually doing what it was designed to do.
A leakage path is possible, of course, but unlikely. It normally is the
too-large line bypass caps in the line filter.
The "cures" are:
1) Don't use a GFI-protected line.
2) Use an isolation transformer.
3) Remove the line filter and:
A) Rebuild it with smaller bypass caps or:
B) Replace it with a modern IEC (computer style) line cord connector,
either a filtered one or a non-filtered one. or:
C) Do away with the filter altogether and cobble in an unfiltered,
directly connected line cord.
In ANY case, Please do use a grounded three wire line cord for safety.
Roy
- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
Home: 301-330-8828 Cell 301-928-7794
Work: Voice: 301-975-3254, Fax: 301-948-6213
roy.morgan at nist.gov --
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