[Lowfer] Big round coil hanging in the air

[jrusgrove at comcast.net]

Andy

Ran captures on the watering hole looking at your loading coil change. Hard to document any 
difference as conditions vary a fair amount night to night. Signal strength looking good, as it 
normally does, since your improvements a month or so back.

http://www.w1vd.com/capture/MPXRCV123109.jpg

Jay W1VD  WD2XNS  WE2XGR/2


----- Original Message ----- 
From: "Andy - KU4XR" <ku4xr at yahoo.com>
To: <lowfer at mailman.qth.net>; "Part-15 Yahoo" <part15 at yahoogroups.com>
Sent: Wednesday, December 30, 2009 7:26 PM
Subject: [Lowfer] Big round coil hanging in the air


> Hi All:
>
> In a hasty rush to try to beat the rain, and darkness, I managed
> to quickly wind a center loading coil for the " XR " antenna.
> I had about 1 hour of daylight, but got it up there. One thing
> that I caught too late to change, ( dark, and now raining ), is
> that I installed the coil Upside Down, meaning that the coil
> windings are going in the oposite direction of the Variometer
> windings. Past experience has shown this to " Buck " against any
> existing Inductance. I may or may not have helped my signal by
> doing that, but when it isn't raining, and I have daylight; I
> will turn it over so all the windings are going in the same
> direction.  ****  Some details  ****
>
> The loading coil is about 4 feet above the roofline of my
> mobile home. My hope is to pull some extra current up the
> vertical, and away from the side of the trailer. I hope it works.
> I'm not sure how to take the meter readings I'm seeing now
> on my TS450 meter, and my FS meter, as well as the RF current
> meter. When I did my antenna project in Nov. I added 5 feet in
> height, and extra top-hat wires. The RF current went up, but
> the FS, and radio meters both dropped in reading. I'm sure they
> are reading " Near Field Voltages " ( The radio only has a
> 4 foot coax jumper connected ), and as has been shown by captures
> afterwards; the signal improved over the RF pathway. NOW; after
> adding the coil, upside down though; The RF current has now
> pegged the 200 mAmp meter scale, that's as high as she will read.
> And same as before; the FS, and radio meters dropped even further.
> I'm hopeing that's a good thing, and that more RF is actually
> radiating from the top of the antenna.
>
> My present measured readings are:
>
> PA Volts = 27 vdc ; PA Current = 37 mAmps ; Power is .999 Watts
> and the RF Current meter as stated is 200 mAmps
>
> Loading Coil details:
>
> Diameter = 6.5" ; Winding length = 4" ; Turns = 26 with #10 AWG
> stranded insulated wire ; Coil Inductance = 88 uH ;
> Resistance = 1.1 Ohm ; unable to measure the distributed
> Capacitance on my LCR meter.
> Coil form = A red plastic Folgers coffee can ( coffee enjoyed )
>
> I'll see how it does for a few days with the Loading Coil as I
> consider it , " Upside down " , then I'll turn it over and see
> what happens then.  **  Lots of cut and try at LF  **
>
> 73 for noe all; and HNY to you also :::
>
>
> Andy - KU4XR - EM75xr - Friendsville, TN.
> LOWfer Beacon " XR " @ 185.29866 KHz ( QRSS-60 )
> Coordinates:  N:  35* 43' 54" - W:  84* 3' 16"
> http://www.myspace.com/beaconxr
> http://webpages.charter.net/ku4xr/
> ***   http://webpages.charter.net/ku4xr/the%20death%20of%20ie-6.jpg   ***
> ****    http://webpages.charter.net/ku4xr/You%20Tube%20Notice.jpg     ****
>
>
>
> ______________________________________________________________
> Lowfer mailing list
> Home: http://mailman.qth.net/mailman/listinfo/lowfer
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Lowfer at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html