<HTML>
<HEAD>
<TITLE>Re: [NSRCA-discussion] 2,4 Module</TITLE>
</HEAD>
<BODY>
<FONT SIZE="4"><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>The antenna’s we used on the 72mhz band were 1/4 wave antenna’s. Approx 1 m. The 72Mhz wavelength is 416cm for a full wave (varying some for which specific frequency you were on.<BR>
<BR>
The 2.4Ghz wavelength is only 12.4cm or about 4.8in. So an equivalent quarter wave antenna will only be about 1.2in in length.<BR>
<BR>
-M<BR>
<BR>
PS for those that care, wavelength (in cm) = speed of light (in cm) / Frequency (in cycles per second)<BR>
<BR>
<BR>
On 5/8/08 10:54 AM, "rcmaster199@aol.com" <rcmaster199@aol.com> wrote:<BR>
<BR>
</SPAN></FONT></FONT><BLOCKQUOTE><FONT SIZE="4"><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>***</SPAN></FONT></FONT><FONT SIZE="5"><FONT FACE="Arial"><SPAN STYLE='font-size:14pt'><B>When you realize all this from that measley little 4" antenna, it's almost jaw-dropping. ***<BR>
</B></SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> <BR>
<BR>
Basically, the length of the antenna is related to frequency of the transmission. 2.4 gig freq is made up of small wavelength. If you remember High School Physics, the relation between Freq and Wavelength... ie- it's an inverse relationship. As Freq goes up, WL becomes small. At 72 meg, WL is fairly long, hence the reason for the longer antenna; at 27 meg, wl is even longer. Those who used 27 meg equipment a bunch of moons ago, will remember that Tx and RX antennas were pretty long and only represented 1/2 the WL (I think it was 1/2)<BR>
<BR>
Dean Pappas, Ed Alt and Jim Oddino can explain further if needed<BR>
<BR>
BTW, tuning a pipe on a 2 stroke requires similar understanding between rpm (base frequency) and tuning length (wavelength of the exhaust pressure front and type of exhaust) to achieve the desired resonance....similar to electrical antennas. QED<BR>
<BR>
MattK<BR>
<BR>
<BR>
</SPAN></FONT></FONT><BLOCKQUOTE><BLOCKQUOTE><BLOCKQUOTE><FONT SIZE="4"><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
<HR ALIGN=CENTER SIZE="3" WIDTH="100%">I am using the free version of SPAMfighter for private users.<BR>
It has removed 7280 spam emails to date.<BR>
Paying users do not have this message in their emails.<BR>
Try SPAMfighter <a href="http://www.spamfighter.com/len"><http://www.spamfighter.com/len></a> for free now!<BR>
<BR>
_______________________________________________<BR>
NSRCA-discussion mailing list<BR>
NSRCA-discussion@lists.nsrca.org<BR>
<a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><BR>
<BR>
</SPAN></FONT></FONT></BLOCKQUOTE></BLOCKQUOTE><FONT SIZE="4"><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
_______________________________________________<BR>
NSRCA-discussion mailing list<BR>
NSRCA-discussion@lists.nsrca.org<BR>
<a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><BR>
<BR>
</SPAN></FONT><FONT FACE="Consolas, Courier New, Courier"><SPAN STYLE='font-size:10pt'>_______________________________________________ NSRCA-discussion mailing list NSRCA-discussion@lists.nsrca.org <a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a> <BR>
</SPAN></FONT></FONT><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:9pt'><HR ALIGN=CENTER SIZE="3" WIDTH="100%">Plan your next roadtrip with MapQuest.com <a href="http://www.mapquest.com/?ncid=mpqmap00030000000004"><http://www.mapquest.com/?ncid=mpqmap00030000000004></a> : America's #1 Mapping Site. <BR>
<BR>
<HR ALIGN=CENTER SIZE="3" WIDTH="95%"></SPAN></FONT></BLOCKQUOTE><FONT SIZE="4"><FONT FACE="Consolas, Courier New, Courier"><SPAN STYLE='font-size:10pt'>_______________________________________________<BR>
NSRCA-discussion mailing list<BR>
NSRCA-discussion@lists.nsrca.org<BR>
<a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><BR>
</SPAN></FONT></FONT></BLOCKQUOTE>
</BODY>
</HTML>