Message-ID: <3B7FD7FB.E4F3F8D6@alg.demon.co.uk>
Date: Sun, 19 Aug 2001 16:15:07 +0100
From: "Steve Rawlings" <steve@alg.demon.co.uk>
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To: "LF Group" <rsgb_lf_group@blacksheep.org>
Subject: LF: The ANC-4 Noise Canceller at 136 kHz
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Hi All,

I have not been on 136 kHz a great deal this weekend because I've
been busy testing a noise canceller for possible use by Bob
G8RW.  (NTL still refuses to investigate the SMPS noise believed
to be coming from their cable TV set-top box installed in a house
next door to Bob.)

Last week, Bob sent me his commercially-built model 'ANC-4' noise
canceller so that I could try modifying it for use on 136 kHz. 
(Bob had bought the unit many years ago for HF use.)  As things
turned out, I found that it appears to be capable of reasonable
performance on 136 kHz without modification.

So, now that we know that it has potential on LF, I will be
returning the unit to Bob to see how he gets on with it at his
QTH.  Fingers crossed.  Details of my experience with the ANC-4
can be found at:
http://www.alg.demon.co.uk/radio/136/anc4test.htm

BTW: I think that Ali did a great job of stimulating activity on
136 this past weekend.  And the long duration between some QSOs
did not discourage Ali putting out numerous CQ calls.  I did not
have much time to listen this weekend, but DF2BC always seemed to
be there!

Regards to all,
Steve GW4ALG