I noticed some of the web sites still have links to my old email account there in Okie
Heres the new ones for the loop for info..
http://kl1x.com/loop1500.jpg
http://kl1x.com/house.jpg
> From: [email protected]
> To: [email protected]
> Date: Fri, 27 Feb 2009 20:10:27 -0500
> Subject: LF: Re: Re: Re: LF Antennas - back to basics
>
> > Dave
> >
> > If you believe this I have a bridge you might be interested in
> > purchasing...
> >
> > Jay W1VD WD2XNS WE2XGR/2
>
>
>
> No thanks, I have enuf worms for fishing...
>
> Besides, I'm lazy and one run of wire outperforms my messy attempts @
> loading the trees with HV wires that detune with humidity...
>
> We installed a short flat top on the Sea Venture ( WJMV ) and I could tell
> you what the relative humidity was by the antenna current...
> Some dielectric measuring device, eh??
>
> 10A into the ground radial common point is power wasted that could have been
> released into the air...
> I'm talking about my crummy ground conductivity here ( silica sand ), not on
> a ship or @ a salt water location...
>
> I think!!
>
> What bridge?? An RF one??
>
> Dave
>
>
>
> ----- Original Message -----
> From: <[email protected]>
> To: <[email protected]>
> Sent: Friday, February 27, 2009 6:19 PM
> Subject: LF: Re: Re: LF Antennas - back to basics
>
>
> >> No wasted power going into and out of the ground...
> >
> > Dave
> >
> > If you believe this I have a bridge you might be interested in
> > purchasing...
> >
> > Jay W1VD WD2XNS WE2XGR/2
> >
> > ----- Original Message -----
> > From: "dave.riley3" <[email protected]>
> > To: <[email protected]>; <[email protected]>
> > Sent: Thursday, February 26, 2009 11:53 AM
> > Subject: LF: Re: LF Antennas - back to basics
> >
> >
> >> Glad you asked, Andy... Hope this one makes it past the spam filter...
> >>
> >> Back in the commercial AM transmitter biz days I buried miles of extra
> >> copper in to poor conductivity soil and gained little or nothing.
> >> Then came Bill Ashloop who proved that a small transmit loop can do quite
> >> well.
> >> http://www.wireless.org.uk/loopy.htm
> >> http://www.w1tag.com/XESANT.htm
> >>
> >> So I surveryed the back yard which sits on very poor conductivity soil
> >> and therefore makes a loop appear to me more in free space and here are
> >> the advantages that I have found to date:
> >>
> >> No high voltage wire ends to start tree fires. No wasted power going into
> >> and out of the ground...
> >>
> >> Much less wire used in a LOOP transmit antenna. This #4 stranded HV wire
> >> rests inside of 100' sections of garden hose and is hoisted into trees
> >> with help of compound bow and pull line.
> >>
> >> No top loading, no radials, much less noise on RX, E-Z to tune and
> >> weather does not affect the tuning much such as from rain or snow, and it
> >> acts like a good vertical regardless of being much simpler.
> >>
> >> As for the CONS, well I just don't think of any... Somebody??
> >>
> >> It works very well from 600M to 6M and is the only real antenna that I
> >> still have.
> >>
> >> Various feeds as noted below will let you tune it down to SAQ@17kc which
> >> I always hear and also makes for superb DX on 6M in 'some directions'.
> >>
> >> ref: http://www.radiocom.net/600M/LOOP109.jpg
> >>
> >> Wish I had a El-Nec printout but can't seem to fit this version in to it.
> >>
> >> QSL SURE VIA E-MAIL
> >> 090226 0406 1 -29 0.0 0.503869 G4JNT IO90 23
> >> 090226 0610 3 -29 0.0 0.503869 G4JNT IO90 23
> >>
> >> Have a quiet night and TNX from Dave @ WD2XSH/17
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> ----- Original Message -----
> >> From: "Andy Talbot" <[email protected]>
> >> To: <[email protected]>
> >> Sent: Thursday, February 26, 2009 11:16 AM
> >> Subject: LF: LF Antennas - back to basics
> >>
> >>
> >>> Having now been encouraged by being decoded now by at least two US
> >>> stations, was wondering how much improvement in efficiency I could
> >>> scrape out of my existing antenna. It is a Marconi Tee, the vertical
> >>> element consisting of three wires from the base tapering to 200mm
> >>> spacing at the top. There it is attached to the centre of a a
> >>> capacity hat 15m long and 200mm wide made of three parallel wires.
> >>>
> >>> The ground system is a bit haphazard in my 7m wide by 12m long garden,
> >>> with about 4 wires meeting at the base of the antenna meandering
> >>> around the garden, starting off in different directions from teh base.
> >>> They are all connected to substantial ground rods in heavy clay at
> >>> their far points, a with a few randomly spaced rods in between (I used
> >>> several 1m lengths of 15mm water pipe as well as proper rods - there
> >>> is probably about 9 or 10 rods in total, mostly 1 - 2m in length -
> >>> can't remember that far back! Some of the earth conductors were also
> >>> bonded to the house wiring by a couple of substantial straps, and even
> >>> inside the house I added more straps at strategic places. I also
> >>> ensured there was a good fat cable run directly under as much of the
> >>> capacity hat as possible. As a test, disconnecting the PME earthing
> >>> bond and measuring the DC resistance between my total set of
> >>> connections and the incoming conductor ground/neutral point, the value
> >>> was a pretty consistent 3 ohms. Haven't done this test for a few
> >>> years, but at the last check it was still of this order.
> >>>
> >>> Back in the 73kHz days a number of (mostly big!) stations were
> >>> surprised my signal was as strong as it was for probably the smallest
> >>> antenna in use then; G3LDO put it down to the fact I had concentrated
> >>> plenty of earthing wire to run directly under the top-hat.
> >>>
> >>> But, its all 14 years old, still OK, but hopefully there's a wealth
> >>> of experience now, and I wonder if there are obvious improvements that
> >>> could be made:
> >>>
> >>> Firstly, bearing in mind there is no scope whatsoever to raise one end
> >>> of the capacity hat which is defined by the apex of the house roof,
> >>> and the other end would also need some major sugery to raise its heigh
> >>> substantially, that only leaves the middle, ie the height of the
> >>> actual radiator. It wouldn't be too difficult to raise this to 10m
> >>> or even more with a fibreglass pole, but will I be throwing away all
> >>> the advantage by having the top-hat drooping down to 7m?
> >>>
> >>> Secondly, pictures of other peoples antennas aften show a substantial
> >>> grounding plate immediately under and around the antenna base. Just
> >>> how far out is is worth going with a really substantial base. I
> >>> could cut more conductors into the ground; while the ground is still
> >>> is still soggy in March may be a good time to do this.
> >>>
> >>> Any ideas please ...?
> >>>
> >>>
> >>> Andy G4JNT
> >>> www.g4jnt.com
> >>>
> >>
> >
>
>
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