Interesting.  Here in the States I have had much better luck in using a
capacitor to couple to the telephone lines.  The intensity of the noise does not
seem to be quite as intense.  This has worked for me for LW through SW.  I
usually use a fairly large capacitor, 0.05 or so as the primary isolator, and a
high resistance resistor, ca. 100 K or so, as a static drain from the low side
to earth.

Doc - K0HTF  EN31dx  (Iowa, USA)
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Dave wrote:

Chaps..

I have tried sucking some RF off the mains by connecting the primary of a
small transformer from the mains supply down to earth via a 22nF capacitor.
The secondary was then used to feed into the receiver in the hope of
cancelling Mains-bourne intereference. Unfortunately the interference I
picked up from the mains seemed to be primarily that from my own house which
I can cure myself! The stuff from other sources didn't seem to be present on
my own mains supply...  This obviously depends on the individual situation
but it didn't work for me.

Good luck anyway!   Dave G3YXM.

>> As most of this local qrm seems to be borne on the mains wiring has
anyone
>> tried taking a signal directly from the mains rather than from a separate
>> "noise antenna"?
>>
>> Mike ZL4OL
>>
>
>I will certainly try this, though I think the TV and games machine
>QRM is radiated by the TV antenna coax outer. Making a crude
>braid breaker (100pF in series with each leg of the coax) fixed the
>S5 QRM from my own TV.