<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Sep 2, 2018, at 15:39, clark prather <<a href="mailto:harpzilla@gmail.com" class="">harpzilla@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:large">When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?</div><div class="gmail_default" style="font-family:"comic sans ms",sans-serif;font-size:large"><br class=""></div></div></div></div></blockquote><br class=""></div><div>The last time I messed with it, there were 73 repeater “pairs” (input-output frequencies) on 2 meters.</div><div><br class=""></div><div>There are a number of simplex frequencies. These “channels” have been coordinated with the ARRL and local repeater groups throughout the country and world.</div><div><br class=""></div><div>Go poke around on <a href="http://arrl.org" class="">arrl.org</a> and read about “Band Plans”</div><div><br class=""></div><div>Channels or memory is just a term the radio world uses to say what radio frequency will be received or transmitted by the method your radio “remembers” that function and type of signal.</div><div><br class=""></div><div>Each type of radio signal takes up more “frequency” or space of the spectrum. Some FM signals are 15khz wide, others 10, some 7.5.</div><div><br class=""></div><div>The old analog TV signals were 5 mhz wide.</div><div><br class=""></div><div>Your radio is tuned to the center frequency, then decodes what is received, however “wide” it is… AM, FM, FM music, data</div><div><br class=""></div><div>If you tune your radio to 146.000 and listen to a transmitter doing 5khz deviation voice, FM, there is “stuff” at 145.995 and 146.005. using 10 khz of the “frequencies” or spectrum.</div><div><br class=""></div><div>Two meters is 4 million hertz wide. 144.00 to 148.00 Mhz. How many 10khz wide voice signals will fit?</div><div><br class=""></div><div>No radio is perfect. There is a need to leave some space between “channels” so a strong transmitter near you does not trash a weak signal on the next channel you want to hear.</div><div><br class=""></div><div>So there is only so much room for a number of “channels” in any frequency range, depending on the type of signal. Go tune across the FM broadcast band. (75khz deviation)</div><div><br class=""></div><div>Go read some basic stuff, then ask better questions, you will get better answers.</div><div><br class=""></div><div><br class=""></div><div><br class=""></div><br class=""></body></html>