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Date: Sat, 1 Mar 2014 10:54:39 -0500
Message-ID: <CAMFjj73evcCNYNrKCwRGarynAzvX8HKMAnfcThysXr09KS_w-Q@mail.gmail.com>
From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: Re: U.S. VLF License WH2XBA
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Hi Alan,

      I agree, there was nothing that I could find that indicated that
there would be a problem at 30kHz. I even checked with a well known vlf
expert who has done design work for some of the BIG military vlf systems.
Somewhere around 70kHz there is a transitional area between waveguide modes
applicable at vlf and ray-tracing which is applicable at higher
frequencies. The increased number of modes above 70kHz I believe explains
the deep fading there as the modes constructively and destructively
interfere.
   However, it didn't hurt to ask for the additional frequencies as Dex was
able to use an existing loading coil to get on 45kHz within hours of the
license being issued!


73 Warren K2ORS


On Sat, Mar 1, 2014 at 10:40 AM, Alan Melia <alan.melia@btinternet.com>wrote:

>  Hi Warren I cant see30kHz being particularly different for propgation in
> that part of the spectrum. I can see 2nd harmonic trashing WWVB clock
> synchronisation over a substantial area though, bearing in mind the
> receivers are very simple.........and most only try to sync around midnight.
>
> Alan
> G3NYK.
>
> ----- Original Message -----
> *From:* Warren Ziegler <wd2xgj@gmail.com>
> *To:* rsgb_lf_group <rsgb_lf_group@blacksheep.org>
> *Sent:* Saturday, March 01, 2014 3:17 PM
> *Subject:* LF: U.S. VLF License WH2XBA
>
>  Hello the list,
>
>     Several questions have come up concerning the WH2XBA grant and I
> thought I might address them here.  Bob W2ZM contacted me about applying
> for a grant at the top end of the vlf range (just below 30kHz).
> The thought was that the high end of vlf would be a bit less challenging
> than the low end below 9kHz (which is unregulated).
>
>     Some of the usual suspects expressed interest so they were added to
> the application. Also Jim AA5BW - Jim and I have a mutual friend through
> work - Jim is highly capable and  technical and has multiple sites
> throughout the country.   There was some concern that the frequencies
> around 30kHz were unoccupied due to propagation reasons and some thought it
> might be good to go a bit higher, hence the 27-59kHz range, leaving
> clearance for WWVB at the top end.
>
>      The license is for 5W ERP, 27-59kHz, CW and every data mode that I
> could think of.
>
>     The application was filed on January 29 and the license issued on
> February 27 - this was despite some Federal Holidays and closings due to
> blizzards!  So I suspect that it didn't raise too many questions.
>
>      The stations are:
> WH2XBA/1     Bob W2ZM
> WH2XBA/2   Warren K2ORS
> WH2XBA/3     Jay W1VD
> WH2XBA/4     Dex  W4DEX
> WH2XBA/5   Laurence KL1L
> WH2XBA/6 /7 /8 etc etc James Plesa AA5BW
>
>
> WH2XBA Grant Attached.
>
> 73 Warren K2ORS
>
> --
> 73 Warren K2ORS
>                 WD2XGJ
>                 WD2XSH/23
>                 WE2XEB/2
>                 WE2XGR/1
>                 WG2XRS/1
>                 WH2XBA/2
>
>
>
>


-- 
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1

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<div dir=3D"ltr">Hi Alan,<div><br></div><div>=A0 =A0 =A0 I agree, there was=
 nothing that I could find that indicated that there would be a problem at =
30kHz. I even checked with a well known vlf expert who has done design work=
 for some of the BIG military vlf systems. Somewhere around 70kHz there is =
a transitional area between waveguide modes applicable at vlf and ray-traci=
ng which is applicable at higher frequencies. The increased number of modes=
 above 70kHz I believe explains the deep fading there as the modes construc=
tively and destructively interfere.</div>
<div>=A0 =A0However, it didn&#39;t hurt to ask for the additional frequenci=
es as Dex was able to use an existing loading coil to get on 45kHz within h=
ours of the license being issued!</div><div><br></div><div><br></div><div>7=
3 Warren K2ORS</div>
<div><br></div></div><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Sat, Mar 1, 2014 at 10:40 AM, Alan Melia <span dir=3D"ltr">&lt;<=
a href=3D"mailto:alan.melia@btinternet.com" target=3D"_blank">alan.melia@bt=
internet.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><u></u>


<div bgcolor=3D"#ffffff">
<div><font face=3D"Arial">Hi Warren I cant see30kHz being particularly=20
different for propgation in that part of the spectrum. I can see 2nd harmon=
ic=20
trashing WWVB clock synchronisation over a substantial area though, bearing=
 in=20
mind the receivers are very simple.........and most only try to sync around=
=20
midnight.</font></div>
<div><font face=3D"Arial"></font>=A0</div>
<div><font face=3D"Arial">Alan</font></div>
<div><font face=3D"Arial">G3NYK.</font></div>
<blockquote style=3D"BORDER-LEFT:#000000 2px solid;PADDING-LEFT:5px;PADDING=
-RIGHT:0px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px" dir=3D"ltr">
  <div style=3D"FONT:10pt arial">----- Original Message ----- </div>
  <div style=3D"FONT:10pt arial;BACKGROUND:#e4e4e4"><b>From:</b>=20
  <a title=3D"wd2xgj@gmail.com" href=3D"mailto:wd2xgj@gmail.com" target=3D"=
_blank">Warren Ziegler</a>=20
  </div>
  <div style=3D"FONT:10pt arial"><b>To:</b> <a title=3D"rsgb_lf_group@black=
sheep.org" href=3D"mailto:rsgb_lf_group@blacksheep.org" target=3D"_blank">r=
sgb_lf_group</a> </div>
  <div style=3D"FONT:10pt arial"><b>Sent:</b> Saturday, March 01, 2014 3:17=
=20
  PM</div>
  <div style=3D"FONT:10pt arial"><b>Subject:</b> LF: U.S. VLF License=20
WH2XBA</div>
  <div><br></div>
  <div dir=3D"ltr">
  <div>
  <div>Hello the list,</div>
  <div><br></div>
  <div>=A0 =A0 Several questions have come up concerning the WH2XBA grant=
=20
  and I thought I might address them here. =A0Bob W2ZM contacted me about=
=20
  applying for a grant at the top end of the vlf range (just below 30kHz).<=
/div>
  <div>The thought was that the high end of vlf would be a bit less challen=
ging=20
  than the low end below 9kHz (which is unregulated).</div>
  <div><br></div>
  <div>=A0 =A0 Some of the usual suspects expressed interest so they were=
=20
  added to the application. Also Jim AA5BW - Jim and I have a mutual friend=
=20
  through work - Jim is highly capable and =A0technical and has multiple=20
  sites throughout the country. =A0 There was some concern that the=20
  frequencies around 30kHz were unoccupied due to propagation reasons and s=
ome=20
  thought it might be good to go a bit higher, hence the 27-59kHz range, le=
aving=20
  clearance for WWVB at the top end.=A0</div>
  <div><br></div>
  <div>=A0 =A0 =A0The license is for 5W ERP, 27-59kHz, CW and every=20
  data mode that I could think of.</div>
  <div><br></div>
  <div>=A0 =A0 The application was filed on January 29 and the license=20
  issued on February 27 - this was despite some Federal Holidays and closin=
gs=20
  due to blizzards! =A0So I suspect that it didn&#39;t raise too many=20
  questions.</div>
  <div><br></div>
  <div>=A0 =A0 =A0The stations are:</div>
  <div>WH2XBA/1 =A0 =A0<span style=3D"white-space:pre-wrap"> </span>Bob=20
  W2ZM</div>
  <div>WH2XBA/2 =A0 <span style=3D"white-space:pre-wrap"></span>Warren K2OR=
S</div>
  <div>WH2XBA/3 =A0 =A0<span style=3D"white-space:pre-wrap"> </span>Jay=20
  W1VD</div>
  <div>WH2XBA/4 =A0 =A0<span style=3D"white-space:pre-wrap"> </span>Dex=20
  =A0W4DEX</div>
  <div>WH2XBA/5 =A0 <span style=3D"white-space:pre-wrap"></span>Laurence=20
  KL1L=A0</div>
  <div>WH2XBA/6 /7 /8 etc etc James Plesa AA5BW</div>
  <div>=A0</div>
  <div><br></div>
  <div>WH2XBA Grant Attached.</div>
  <div><br></div>
  <div>73 Warren K2ORS</div></div><span class=3D"HOEnZb"><font color=3D"#88=
8888">
  <div><br></div>-- <br>73 Warren K2ORS<br>=A0 =A0 =A0 =A0 =A0=20
  =A0 =A0 =A0 WD2XGJ <br>=A0 =A0 =A0 =A0 =A0 =A0=20
  =A0 =A0 WD2XSH/23<br>=A0 =A0 =A0 =A0 =A0 =A0 =A0=20
  =A0 WE2XEB/2<br>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=20
  WE2XGR/1
  <div>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WG2XRS/1</div>
  <div>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=20
  WH2XBA/2<br><br>=A0 </div></font></span></div></blockquote></div>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>73 Warren K2=
ORS<br>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XGJ <br>=A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 WD2XSH/23<br>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2<br>=A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 WE2XGR/1<br><br>=A0
</div>

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