interference sources
"Brian Gaff"
Hi folks, just in the last two weeks I've had some resets of a freeview
box, and decided to listen around the bands to see if it was being caused
by some odd mains borne stuff. It seems it is.
The offending signal is easily detected 24 hours as a kind of arcing noise
every 30 seconds or so. My thoughts are maybe..
Charger trying to see if it needs to charge, plug in air freshener, or
something else. I've tried to locate it with a portable radio as the
signal on medium wave is horrendously loud even on a portable.
Results are inconclusive. Not being on the best of terms with the property
implicated here, I am trying to find some way to approach them and
knowing if there is some device like this might be one of the ways. I'm
thinking along the lines of it might be going to catch fire or similar.
I'd have thought if it is affecting me, its affecting them.
** Might be a worn out fluoro tube trying to start itself up - that can
make one HELL of an RF burst in doing so.
The last time I tracked down such an evil RFI source, it turned out to be a
modest size, red neon sign in the window of a pharmacist shop almost 100
metres away.
The noise easily penetrated audio gear on my test bench as well as any sort
of AM radio - but luckily not broadcast FM or TV signals.
..... Phil
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