Martyn.
Could it be one of those water softener things that are supposed to achieve
results by some magical means and consist of a box of electronics and some
wires which get wrapped around the incoming water pipe?
The other thing I have heard of is central heating oil-tank level sensors.
Try a loop aerial and see if you can DF it. It will hopefully come from a
point source so you should be able to use a noise canceller but it's
difficult to erect a big enough noise aerial for LF.
Is it audible on medium or long wave BC bands? If so you could take a walk
with your trusty transistor radio and see if you can track it down.
That's my tuppenceworth...
73
Dave
G3YXM
----- Original Message -----
From: "Martyn" <[email protected]>
To: <[email protected]>
Sent: Wednesday, November 26, 2003 10:20 PM
Subject: LF: Newbie question
Hi folks,
I have been monitoring 137 for a couple of weeks now, but for the last
week
or so I have been getting this consistent 1 second broadband (from about
133khz to about 139khz pulse. see attached jpg. Is this typical? or better
still can anyone suggest what it might be please? DCF39 is clear on the
trace and very strong.. Even better, can I get rid of it. The next step is
probably a noise canceller but I'm not sure how effective this will be on
a
broadband noise pulse
Ant is a dual vertical wire to approx 10m high with a pair of 18m
horizontal
Capacity wires seperated by abt 800mm in an offset 'T' formation. Looding
coil is about 5mH. Rx pre-amplifier is the Mk1 G0MRF kit feeding my FT-920
HF rig.
Thanks
Martyn
----------------------------------------
Martyn Kinder G0CZD
mailto:[email protected]
http://www.czd.org.uk
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