[RFI] Noise sniffer article in QST - WW3S

[Hare,Ed, W1RFI]

A similar unit is available from Ron Graham Electronics in Australia.  I
ordered one for the ARRL Lab using Paypal.

See http://users.mackay.net.au/~ron/

73, 
Ed Hare, W1RFI
ARRL Lab
225 Main St
Newington, CT 06111
Tel: 860-594-0318
Internet: w1rfi@arrl.org
Web: http://www.arrl.org/tis



> -----Original Message-----
> From: dgsvetan@rockwellcollins.com 
> [mailto:dgsvetan@rockwellcollins.com]
> Sent: Thursday, January 24, 2002 10:59 AM
> To: pringle50@home.com; rfi@contesting.com
> Subject: Re: [RFI] Noise sniffer article in QST - WW3S
> 
> 
> 
> It would be interesting if anyone on the reflector happens to 
> know if the
> Oak unit, or a similar replacement, is still available.  I 
> can tell you
> that they are no longer in Illinois.  I used to live in 
> Crystal Lake, IL,
> which was the location of Oak's main plant for many years.  
> They totally
> moved out and folded that plant back in the early 80's.  They 
> did have an
> operation somewhere in California, which is where their TV 
> tuner and cable
> set-top boxes were located after moving out of IL.  (Oak was 
> either the
> largest, or at least one of the largest, manufacturers of TV 
> tuners when
> the turret switching type of tuner was THE style in use - 
> 50's thru early
> 70's.)
> 
> 73, Dale
> WA9ENA
> 
> 
> 
> 
> <pringle50@home.com>@contesting.com on 01/24/2002 08:39:26 AM
> 
> Sent by:  rfi-admin@contesting.com
> 
> 
> To:   <RFI@contesting.com>
> cc:
> 
> Subject:  Re: [RFI] Noise sniffer article in QST - WW3S
> 
> 
> N4ZR is correct in suggesting an AM receiver in the aeronautical band.
> 
> One of the nicer professional models made for Utility Companies and
> Cable Companies to use in policing noise was manufactured by Oak
> Industries in Illinois and used a frequency of approximately 260MHz
> and employed an S meter to measure noise intensity.  It also used a
> small 5 element yagi hand carried that would alow the operator to
> rotate the antenna through both horizontally and vertically polarized
> noise.
> 
> What makes N4ZR's suggestion so worthwhile is one could easily use a
> small yagi as the sniffing antenna with the handheld receiver.
> Typically the noise is easier to find when the sensing equipment
> operates on higher frequencies than 150MHz based on my long personal
> experience in locating it.  Remember noise is basically an infinite
> number of squarewaves usually very broad spectrum.
> 
> The Oak unit referred to above with its yagi antenna allowed the
> operator to identify exactly where the noise was coming from on a pole
> for example.  Often times due to cracked insulators, loose clamps or
> ground wires etc.
> 
> Good luck in locating your source.
> 
> 73,
> J. Leon Pringle, Jr    W 5 N A
> 
> 
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