Vigra MW 2EN

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" height=50 BGCOLOR="#0099FF" TEXT="#F7F7FF"> <div> <FONT SIZE="4" COLOR="#FFFFFF" FACE="Arial" ><B>Bernd Waniewski - http://www.waniewski.de </B></FONT><B>     |     </B><A HREF="http://www.waniewski.de/index.htm" TARGET="_top" TITLE="http://www.waniewski.de/index.htm"><U><B>Startseite</B></U></A><B>   </B><A HREF="http://www.waniewski.de/id208.htm" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm"><U><B>Home</B></U></A><B>   </B><A HREF="http://www.waniewski.de/id207.htm" TARGET="_top" TITLE="http://www.waniewski.de/id207.htm"><U><B>Acceuil</B></U></A></div> <bR> <div> </div> </td> </tr><tr> <td valign="top" height=430 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> Vigra MW  2EN</div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="892" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFCC > <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 51 ><NOBR><div> <B> <A NAME="previous___next"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A></B><B>previous   next</B></div> <div> <A HREF="vigra_mw_1en.htm" TARGET="_top" TITLE="Vigra MW 1EN"><U><B><</B></U></A><B>      </B><A HREF="id300.htm" TARGET="_top" TITLE="Vigra MW 3EN"><U><B>></B></U></A></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="231"><div> <B>Vigra</B></div> <div> <A HREF="vigra_mw_1en.htm" TARGET="_top" TITLE="Vigra MW 1EN"><U><B>1</B></U></A><FONT SIZE="3" COLOR="#000000" FACE="Arial" ><B>  </B><B>2</B></FONT><B>  </B><A HREF="id300.htm" TARGET="_top" TITLE="Vigra MW 3EN"><U><B>3</B></U></A><B>  </B><A HREF="id301.htm" TARGET="_top" TITLE="Vigra MW 4EN"><U><B>4</B></U></A></div> </tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id296.htm" TARGET="_top" TITLE="Vigra MW 2DE"><U><IMG SRC="a94331f0.gif" border=0 width="51" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A></div> <div> <A HREF="id296.htm" TARGET="_top" TITLE="Vigra MW 2DE"><U>German</U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <A HREF="http://www.waniewski.de/id208.htm" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm"><U><B>Home</B></U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U>Survey of </U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U>projects</U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U> A-Z</U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <A HREF="http://www.waniewski.de/id208.htm#all_projekts_by_list_of_frequencies" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_pr"><U>Projects by </U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_projekts_by_list_of_frequencies" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_pr"><U>list of </U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_projekts_by_list_of_frequencies" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_pr"><U>frequencies</U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66 WIDTH="214"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="51" ALIGN="bottom" WIDTH="214" HSPACE="0" VSPACE="0"></tD> </tR> </TABLE></div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="892" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFCC > <tR> <tD VALIGN=TOP HEIGHT= 19 WIDTH="647"><div> MW antenna "Vigra" - tubular mast</div> </tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> All photos by Jan Inge Ramsvik</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 486 ><NOBR><div> <IMG SRC="6ab80e00.jpg" border=0 width="640" height="480" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="212"><div> Tubular mast</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="890" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFCC > <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 486 ><NOBR><div> <IMG SRC="6ac80e00.jpg" border=0 width="640" height="480" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="211"><div> Base of the mast with antenna tuning hut</div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="891" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFCC > <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 486 ><NOBR><div> <IMG SRC="6af80e00.jpg" border=0 width="640" height="480" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="216"><div> Lightning protection coil at the base of the antenna</div> <bR> </tD> </tR> <tR> <tD VALIGN=TOP BGCOLOR=#FFFFCC HEIGHT= 205 WIDTH="642"><div> The lightning protection coil (Blitzschutzspule) is provided in order to prevent lightning from entering the antenna tuning hut. The principle of functioning is shown on the sketch to the right.  There are two spark gaps (Funkenstrecke) before and behind the lightning protection coil. In case the quick lightning current flows down the mast towards the a.t.u., an additional voltage builds up across the lightning protection coil: u = - L di/dt. Due to the increased voltage  across the spark gap F1 the lightning current ignites the spark gap and flows across it not entering the antenna tuning hut. </div> <div> The second spark gap F2 is adjusted much more sensitive than F1 for the discharge of remaining overvoltages.</div> </tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <IMG SRC="ebdc9c80.gif" border=0 width="201" height="200" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> </TABLE></div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="891" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFCC > <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 51 ><NOBR><div> <B>previous   next</B></div> <div> <A HREF="vigra_mw_1en.htm" TARGET="_top" TITLE="Vigra MW 1EN"><U><B><</B></U></A><B>      </B><A HREF="id300.htm" TARGET="_top" TITLE="Vigra MW 3EN"><U><B>></B></U></A></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="360"><div> <B>Vigra</B></div> <div> <A HREF="vigra_mw_1en.htm" TARGET="_top" TITLE="Vigra MW 1EN"><U><B>1</B></U></A><FONT SIZE="3" COLOR="#000000" FACE="Arial" ><B>  2</B></FONT><B>  </B><A HREF="id300.htm" TARGET="_top" TITLE="Vigra MW 3EN"><U><B>3</B></U></A><B>  </B><A HREF="id301.htm" TARGET="_top" TITLE="Vigra MW 4EN"><U><B>4</B></U></A></div> </tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id296.htm" TARGET="_top" TITLE="Vigra MW 2DE"><U><IMG SRC="a94331f0.gif" border=0 width="51" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A></div> <div> <A HREF="id296.htm" TARGET="_top" TITLE="Vigra MW 2DE"><U>German</U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66 WIDTH="51"><div> <A HREF="http://www.waniewski.de/id208.htm" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm"><U><B>Home</B></U></A></div> </tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U>Survey of </U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U>projects</U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U> A-Z</U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <A HREF="http://www.waniewski.de/id208.htm#all_projekts_by_list_of_frequencies" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_pr"><U>Projects by </U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_projekts_by_list_of_frequencies" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_pr"><U>list of </U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_projekts_by_list_of_frequencies" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_pr"><U>frequencies</U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66 WIDTH="99"><div> <A HREF="#previous___next" TITLE="Vigra MW 2EN"><U>Back to top</U></A></div> <div> <A HREF="#previous___next" TITLE="Vigra MW 2EN"><U><IMG SRC="ee10f0c0.gif" border=0 width="15" height="12" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A></div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="866" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFCC > <tR> <tD VALIGN=TOP COLSPAN=2 BGCOLOR=#FFCC66 HEIGHT= 32 WIDTH="836"><div> <B>Visitor's statistics:</B></div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 270 WIDTH="188"><div>  <script type="text/javascript" src="http://feedjit.com/serve/?vv=525&tft=3&dd=0&wid=2d826706c2aec926&pid=0&proid=0&bc=FFFFFF&tc=000000&brd1=012B6B&lnk=135D9E&hc=FFFFFF&hfc=2853A8&btn=C99700&ww=200"></script><noscript><a href="http://feedjit.com/">Feedjit Live Blog Stats</a></noscript>  </div> <div>   <script type="text/javascript" src="http://fc.webmasterpro.de/counter.php?name=Waniewski&style=pre&w=100&h=22&bgC=ffffff&p=01oldstyle" id="fcScript-Waniewski"></script> <noscript><div><img src="http://fc.webmasterpro.de/as_noscript.php?name=Waniewski" style="width:1px;height:1px;" alt="" /></div></noscript> <br /><a href="http://fc.webmasterpro.de/stat.php?name=Waniewski"><img src="http://fc.webmasterpro.de/img/sl/01.jpg" alt="visitor's statistic" style="border:0px" /></a>  </div> <bR> <div>  <script type="text/javascript" src="http://widgets.amung.us/small.js"></script><script type="text/javascript">WAU_small('m9rcvtp7h0ey')</script>  </div> <div> now online</div> </tD> <tD VALIGN=TOP BGCOLOR=#EEEEEE><NOBR><div> The flags of the visitors from all over the world </div> <div> (since 2009-1-18) :</div> <div>  <a href="http://s02.flagcounter.com/more/3cS"><img src="http://s02.flagcounter.com/count/3cS/bg=FFFFFF/txt=000000/border=CCCCCC/columns=7/maxflags=248/viewers=My+visitors+are+coming+from/labels=1/pageviews=1/" alt="free counters" border="0"></a>  </div> <bR> <div> The visitors from the USA and their flags of 50 federal states + DC </div> <div> (since 2010-3-21):</div> <div>  <a href="http://states.flagcounter.com/more/2x"><img src="http://states.flagcounter.com/count/2x/bg=FFFFFF/txt=000000/border=CCCCCC/columns=7/maxflags=60/viewers=Visitors+from+USA/labels=1/pageviews=1/" alt="free counters" border="0"></a>  </div> <bR> <div> The visitors from Canada and their flags of 13 provinces & territories </div> <div> (since 2010-4-24)</div> <div>  <a href="http://canada.flagcounter.com/more/MXYu"><img src="http://canada.flagcounter.com/count/MXYu/bg=FFFFFF/txt=000000/border=CCCCCC/columns=7/maxflags=60/viewers=Visitors+from+Canada/labels=1/pageviews=1/" alt="free counters" border="0"></a>  </div> <div>  <a href="http://2.s02.flagcounter.com/more/3cS"><img src="http://2.s02.flagcounter.com/count/3cS/bg=FFFFFF/txt=000000/border=CCCCCC/columns=7/maxflags=105/viewers=Last+arrived+visitors/labels=1/pageviews=1/" alt="free counters" border="0"></a>  </div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=2 BGCOLOR=#EEEEEE HEIGHT= 66 WIDTH="836"><div> <B> <script type="text/javascript" src="http://widgets.amung.us/map.js"></script><script type="text/javascript">WAU_map('hzzgf97fs2n9', 740, 370, 'natural', 'star-orange')</script>  </B></div> </tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=2 BGCOLOR=#FFCC66 HEIGHT= 79 WIDTH="836"><div> <B> <script type="text/javascript" src="http://widgets.tcimg.com/v1/flag.js"></script><script type="text/javascript">tc_flag("r37xujeu", "de", "ffffff", "000000", "000000", "10", "15");</script>  </B></div> <div> since 2010-6-27</div> </tD> </tR> </TABLE></div> <bR> <bR> <bR> <bR> <bR> <bR> <bR> <bR> <bR> <bR> </td> </tr></table></body>