[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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