[Lowfer] NC Booming in on ground wave

[Bill Ashlock]

Dale,

Fine business on all fronts! Will be following the results of future 
experiments with interest. Appears you are the ideal distance from Mr Dex 
for antenna experiments (as long as he promises to behave). Much more solid 
and repeatable 'findings' from a surface wave compared to unpredictable 
skywave reception, although there isn't as much glory involved.

Speaking of metal buildings and their effect on loop antennas, it seems to 
me that a certain innkeeper had to change the location of his loop in order 
to avoid a deQing issue. ....OR was that simply to avoid the "wrong way 
callihan" syndrome? <G>

Bill A


>From: Dale Parfitt <parinc@gte.net>
>Reply-To: lowfer@mailman.qth.net
>To: lowfer@mailman.qth.net
>Subject: Re: [Lowfer] NC Booming in on ground wave
>Date: Tue, 26 Aug 2003 23:23:40 -0400
>
>
>
>Bill Ashlock wrote:
>
> > Hi Dale,
> >
> > >................. and nowheres near present levels when the 7' loop was 
>4'
> > >off the ground
> > >(now at 12' to the bottom).
> >
> > Very interesting. You're saying that raising the loop from 4' to 12' has 
>a
> > noticeable effect? This is contrary to the theory that a good many of us
> > subscribe too.... that the H-field should not vary with height above the
> > ground). I will concede some signal improvement due to improved Q, 
>however,
> > (Similar to a TX loop's spacing from the ground). I've also experienced 
>a
> > signal-to-noise inprovement with height in my woods  because of some 
>buried
> > wires near the RX loop.
> >
> > Can you determine if this 'improvement' is in S/N or signal strength? 
>(or
> > both?).
> >
> > Thanks.
> >
> > Bill A
> >
> > PS: Of course the gain you see could be the result of that character on 
>the
> > other end of the signal playing tricks on you. :)
> >
>
>I considered that first Bill- maybe Dex had a KW on it last night and 
>tonight!
>Getting the KW up and running 2 weeks back could have been the start of the
>power outage.
>
>I need to take time to look at some NDB's that I had previously logged to 
>see
>if they too are enhanced.
>I had been monitoring NC for several weeks on a daily basis with the 7' 
>loop at
>4'. Dex and I agreed that my best capture (QRSS60 speed) at that time was 
>most
>likely NC, but not good enough for a positive ID.
>
>The loop is on a hill side with quite a slope- perhaps 20 degrees running 
>up to
>the west and down to the east. An 8X12' metal roofed shed is about 15' away
>from the loop on the south side. Raising the loop gets almost all of it 
>above
>the shed.
>
>A I stated previously, NC (due east of me)is now identifiable all day long 
>and
>into the early evening. Enhancement at 0000 UTC is outrageous- I keep 
>thinking
>I am hearing the signal in addition to seeing a nice solid white trace on 
>Argo.
>No conclusions as to whether this is stronger signal or less noise at this
>point.
>
>I'll have more time after Shelby to do some NDB comparisons.
>
>Dale W4OP
>
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