[CQ-Contest] ANC-4 Noise Cancelling box - FOR SALE

Mark Beckwith n5ot at n5ot.com
Sat Mar 24 21:38:43 EST 2007

I have one of these FOR SALE.  Very clean and 100% working condition, as 
new, in box.  Complete.  Works as advertised.  Used one time at PJ4R in 
2005 - world #1 ARRL DX CW M/2.  $150.

Mark, N5OT

----- Original Message ----- 
From: "W0MU Mike Fatchett" <w0mu at w0mu.com>
To: <cq-contest at contesting.com>
Sent: Saturday, March 24, 2007 2:38 PM
Subject: [CQ-Contest] ANC-4 Noise Cancelling box

>I have had an opportunity to play with one of these boxes and they work 
> well  *IF* you can get a sense antenna that hears the same noise that you
> have.  It should only be as long as needed to pick up the offending noise.
> In my case I have a very noise power line  to the NE only about 1000 ft 
> from
> my tower.  The power company has been notified so hopefully this will not 
> be
> a prolonged experience.
> I as able to erect a low dipole very close to the power line.  It is about 
> 3
> ft off the ground.  I started with a dipole that was 4 ft on each leg but
> that did not have enough signal so I lengthened to about 14ft on both 
> sides
> and this worked much better.
> I found the extendable antenna to work a bit but it picked up all sorts of
> birdies and other shack noise.  I also tried hooking up my R8 vertical as 
> a
> sense antenna but that was too much signal to handle.
> The unit comes shipped with a relay delay set to slow which I found very
> annoying as I had to hear about 2 seconds of the power line noise before 
> the
> unit would engage after transmitting.  You can change this by moving a
> jumper inside the unit.
> Mike W0MU
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