"Tony Gartshore" wrote in message
...
In article ,

says...

http://www.apah69.dsl.pipex.com/keith_g/show/glitch.jpg

It's very likely the thermostat or boiler which are both brand new and
therefore quite silent, so I haven't been able to catch it 'at it' yet
but
what's mystifying me is why does it drag the waveform down which then
takes
about a 1/4 of a second to recover? It's nothing like a scratch (or the
tower of crap the old boiler used to add in to the proceedings) and
therefore damn near impossible to remove!

Anyone got a clue what's happening?

Someone or something treading on a capacitive mic cable ?


Gawd, what does that mean then?

(Not sure anyone's walking on the cables when it happens though!)