<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;}
@font-face
{font-family:"Segoe UI Emoji";
panose-1:2 11 5 2 4 2 4 2 2 3;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
font-size:10.0pt;
font-family:"Courier New";}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;}
span.EmailStyle23
{mso-style-type:personal-compose;
font-family:"Aptos",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">I have heard of these things talked about after my transition to EE but never could find a great reference on how exactly they worked.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I get installing single stub series and parallel with either capacitive resistive or inductive loads (or simply calculating the coax length) in order to eliminate reactive power (which is your imaginary reflected
power). I thought inductors had to be connected into the coax and not just slid over the outside in order to actually destructively interfere with reflected power.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Additionally, if an RF wave is generated inside of a transmitter via electron change of motion and that wave is then guided in a wave guide how is that wave dispersed and manipulated in say a rototiller antenna.
The root of the radiation is the electron manipulation in the transmitter itself.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Stephen Lockwood <lockwood@hatdaw.com>
<br>
<b>Sent:</b> Tuesday, July 30, 2024 12:38 PM<br>
<b>To:</b> Pearson, Ron <RonPearson@iheartmedia.com>; Charles Sather <CSather@knba.org>; SBE-89-Alaska <sbe-89-alaska@sea.sbe16.org><br>
<b>Subject:</b> Re: [SBE-89-Alaska] [EXTERNAL] Re: HARRP<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p><span style="font-size:13.5pt">Nautel insist on toroidal ferrites on the coax headed to the antenna. As this keeps Thor from killing the MOSFETS. As the HAARP Transmitters are tubes they are not quite a sensitive. They are designed to operate anywhere
on the smith chart for load impedance... In fact off the smith chart as they can work with a negative impedance (power being fed back).
</span><o:p></o:p></p>
<pre>Stephen S. Lockwood, P.E., PMP, President<o:p></o:p></pre>
<pre>Hatfield & Dawson Consulting Engineers<o:p></o:p></pre>
<pre>9500 Greenwood Ave N, Seattle, WA 98103<o:p></o:p></pre>
<pre>Phone 206 783 9151 ext 562 - Mobile 206 399 9440 - <a href="http://www.hatdaw.com/">www.hatdaw.com</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 7/30/2024 1:14 PM, Pearson, Ron wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:11.0pt">What are you referring to with ferrites?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Stephen Lockwood
<a href="mailto:lockwood@hatdaw.com"><lockwood@hatdaw.com></a> <br>
<b>Sent:</b> Tuesday, July 30, 2024 12:07 PM<br>
<b>To:</b> Charles Sather <a href="mailto:CSather@knba.org"><CSather@knba.org></a>; Pearson, Ron
<a href="mailto:RonPearson@iheartmedia.com"><RonPearson@iheartmedia.com></a>; SBE-89-Alaska
<a href="mailto:sbe-89-alaska@sea.sbe16.org"><sbe-89-alaska@sea.sbe16.org></a><br>
<b>Subject:</b> Re: [SBE-89-Alaska] [EXTERNAL] Re: HARRP</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p><span style="font-size:13.5pt">There are none! </span><o:p></o:p></p>
<pre>Stephen S. Lockwood, P.E., PMP, President<o:p></o:p></pre>
<pre>Hatfield & Dawson Consulting Engineers<o:p></o:p></pre>
<pre>9500 Greenwood Ave N, Seattle, WA 98103<o:p></o:p></pre>
<pre>Phone 206 783 9151 ext 562 - Mobile 206 399 9440 - <a href="http://www.hatdaw.com/">www.hatdaw.com</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 7/30/2024 1:04 PM, Charles Sather wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Did you get a count of ferrites for Jeff?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<div>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#783F04">Charles Sather</span></b><b><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#783F04"><br>
</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#783F04">Chief Operating Officer,</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#783F04"> </span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Koahnic
Broadcast Corporation</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#783F04">P. 907-793-3535 | </span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#B45F06">koahnicbroadcast.org</span><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#B45F06">
<br>
</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Support KBC and its programs through Pick.Click.Give</span><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> SBE-89-alaska
<a href="mailto:sbe-89-alaska-bounces@sea.sbe16.org"><sbe-89-alaska-bounces@sea.sbe16.org></a>
<b>On Behalf Of </b>Pearson, Ron via SBE-89-alaska<br>
<b>Sent:</b> Tuesday, July 30, 2024 10:30 AM<br>
<b>To:</b> Stephen Lockwood <a href="mailto:lockwood@hatdaw.com"><lockwood@hatdaw.com></a>; SBE-89-Alaska
<a href="mailto:sbe-89-alaska@sea.sbe16.org"><sbe-89-alaska@sea.sbe16.org></a><br>
<b>Subject:</b> Re: [SBE-89-Alaska] [EXTERNAL] Re: HARRP</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Very cool thank you for the cliffs notes</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Stephen Lockwood <<a href="mailto:lockwood@hatdaw.com">lockwood@hatdaw.com</a>>
<br>
<b>Sent:</b> Tuesday, July 30, 2024 10:20 AM<br>
<b>To:</b> Pearson, Ron <<a href="mailto:RonPearson@iheartmedia.com">RonPearson@iheartmedia.com</a>>; SBE-89-Alaska <<a href="mailto:sbe-89-alaska@sea.sbe16.org">sbe-89-alaska@sea.sbe16.org</a>><br>
<b>Subject:</b> Re: [EXTERNAL] Re: [SBE-89-Alaska] HARRP</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p><span style="font-size:13.5pt">They did. They use NEC4 (if I remember correctly). It is just classic array physics - just big at these frequencies. The physics is the same for the nifty flat panel radar arrays or curtain dipole arrays like we use in
HF broadcasting. They just have some very cool software to change the transmitter exciters to provide beam steering, circular polarization, and lots of other cool stuff. Each dipole has its own transmitter. 180 cross dipoles with 360 10 kW transmitters.
</span><o:p></o:p></p>
<pre>Stephen S. Lockwood, P.E., PMP, President<o:p></o:p></pre>
<pre>Hatfield & Dawson Consulting Engineers<o:p></o:p></pre>
<pre>9500 Greenwood Ave N, Seattle, WA 98103<o:p></o:p></pre>
<pre>Phone 206 783 9151 ext 562 - Mobile 206 399 9440 - <a href="https://urldefense.com/v3/__http:/www.hatdaw.com/__;!!Fhnm7mQ!YevFlM_ZEfDefuiwzTJkzkf3AD_m2gz3bNuRV1vBloyNl5i_dk3lqxRT4g9XVBQQvAF9JlCoiH0A9Sxn42qDMt_OlQ$">www.hatdaw.com</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 7/30/2024 9:44 AM, Pearson, Ron wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:11.0pt">Hello Stephen,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Was it awesome, did they go over finite element (MOM) models and programming on how the array was built and modeled and the conceptual motivation for the design?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thank you </span><span style="font-size:11.0pt;font-family:"Segoe UI Emoji",sans-serif">😊</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Ron</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> SBE-89-alaska
<a href="mailto:sbe-89-alaska-bounces@sea.sbe16.org"><sbe-89-alaska-bounces@sea.sbe16.org></a>
<b>On Behalf Of </b>Stephen Lockwood via SBE-89-alaska<br>
<b>Sent:</b> Wednesday, July 24, 2024 7:11 AM<br>
<b>To:</b> Pierre Lonewolf <a href="mailto:lonewolf@otz.net"><lonewolf@otz.net></a>; SBE Chapter 89 Alaska
<a href="mailto:sbe-89-alaska@sea.sbe16.org"><sbe-89-alaska@sea.sbe16.org></a><br>
<b>Subject:</b> [EXTERNAL] Re: [SBE-89-Alaska] HARRP</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Did you find a ride?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Stephen Lockwood <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">On Jul 21, 2024, at 19:41, Pierre Lonewolf via SBE-89-alaska <<a href="mailto:sbe-89-alaska@sea.sbe16.org" target="_blank">sbe-89-alaska@sea.sbe16.org</a>> wrote:
<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
<pre style="margin-bottom:12.0pt">Is anyone from Anchorage driving to the HARRP tour? I finally looked at the map and why am I going to Fairbanks!?<o:p></o:p></pre>
<pre style="margin-bottom:12.0pt"> <o:p></o:p></pre>
<pre style="margin-bottom:12.0pt">Pierre Lonewolf<o:p></o:p></pre>
<pre style="margin-bottom:12.0pt">PO Box 983<o:p></o:p></pre>
<pre style="margin-bottom:12.0pt">393B Whittier Street<o:p></o:p></pre>
<pre style="margin-bottom:12.0pt">Kotzebue, Alaska 99753-0983<o:p></o:p></pre>
<pre style="margin-bottom:12.0pt"> <o:p></o:p></pre>
<pre style="margin-bottom:12.0pt">19074120859 cell<o:p></o:p></pre>
<pre style="margin-bottom:12.0pt">19074423603 fax<o:p></o:p></pre>
<pre style="margin-bottom:12.0pt"><a href="mailto:Lonewolf@otz.net">Lonewolf@otz.net</a><o:p></o:p></pre>
<pre style="margin-bottom:12.0pt"><a href="mailto:Plonewolf55@gmail.com">Plonewolf55@gmail.com</a><o:p></o:p></pre>
<pre style="margin-bottom:12.0pt"> <o:p></o:p></pre>
<pre style="text-align:center"><hr size="2" width="100%" align="center"></pre>
<pre> <o:p></o:p></pre>
<pre>This List Server is provided by Hatfield & Dawson Consulting Engineers, Seattle, WA<o:p></o:p></pre>
<pre>SBE-89-alaska mailing list<o:p></o:p></pre>
<pre><a href="mailto:SBE-89-alaska@sea.sbe16.org">SBE-89-alaska@sea.sbe16.org</a><o:p></o:p></pre>
<pre><a href="https://urldefense.com/v3/__http:/sea.sbe16.org/mailman/listinfo/sbe-89-alaska__;!!Fhnm7mQ!YevFlM_ZEfDefuiwzTJkzkf3AD_m2gz3bNuRV1vBloyNl5i_dk3lqxRT4g9XVBQQvAF9JlCoiH0A9Sxn42qGGkVbiA$">http://sea.sbe16.org/mailman/listinfo/sbe-89-alaska</a><o:p></o:p></pre>
</blockquote>
</div>
<div style="border:solid #9C6500 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class="MsoNormal" style="line-height:12.0pt;background:#FFEB9C"><b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#9C6500">CAUTION:</span></b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black"> This message
originated from outside of the company. Please take all precautions when opening attachments or links from outside sources.</span><o:p></o:p></p>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</div>
</body>
</html>