[Lowfer] XGJ in CT

n8tl n8tl at woh.rr.com
Mon Dec 20 10:38:55 EST 2010


Hi Jay:

After you verify a noise source that impacts you, what are your next steps?

Tom N8TL

On Sun, 19 Dec 2010 21:45:23 -0500
<jrusgrove at comcast.net> wrote:

> Warren
> 
> Before I answer your question here's the setup:
> 
> Vehicle is a 2000 Dodge Ram pickup. A short length (18") of 2X3 is inserted in the bed rear corner 
> 'stake' hole and the e probe is attached to he 2X3. The e probe sits a foot or so above the bed rim 
> and uses the standard 1 meter whip. The connecting coax runs along the flat surface of the bed and 
> into the cab through the rear sliding window. A transformer isolated dc injector is used between the 
> e probe coax and the R75 receiver. For low noise operation a separate 'floating from chassis ground' 
> power source is a must. I use a 12 volt Dewalt battery from my cordless drill ... because it's 
> convenient, lasts a long time and is easy to recharge. Note that the e probe is not grounded to the 
> back corner of the bed.
> 
> This setup is the quietest of anything I've tried and was 'perfected' back during the days of lowfer 
> beacon VD. I can hear the 'natural' noise floor at just about all frequencies and one would never 
> know that they were mobile - except for the dead giveaway when driving under overhanging trees. I 
> can't say that there are no frequencies where the vehicle noise causes interference but they are few 
> and far between. It's great for tracking down power line noise ... which was today's mission.
> 
> Jay W1VD  WD2XNS  WE2XGR/2
> 
> 
> 
> 
> ----- Original Message ----- 
> From: <k2ors at verizon.net>
> To: <lowfer at mailman.qth.net>
> Sent: Sunday, December 19, 2010 9:08 PM
> Subject: Re: [Lowfer] XGJ in CT
> 
> 
> > Hi Jay,
> >         Thanks for the report - how quiet is the e-probe in the mobile?
> >
> > 73 Warren K2ORS
> >          WD2XGJ
> >          WD2XSH/23
> >          WE2XEB/2
> >          WE2XGR/1
> >
> >
> > Dec 19, 2010 08:01:54 PM, lowfer at mailman.qth.net wrote:
> >
> > Warren
> >
> > Was driving around the area this afternoon looking for a power line noise source. XGJ was 
> > bodacious
> > on the modified Amrad e probe / R75 mobile setup.
> >
> > Jay W1VD  WD2XNS  WE2XGR/2
> >
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-- 
n8tl <n8tl at woh.rr.com>


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