<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1526826459521_5712"><span id="yui_3_16_0_1_1526826459521_5711">The "generic" term, "AM", normally, to most amateur radio operators, refers to a signal amplitude modulated that has the carrier present. Of course, FM and PM also have a carrier.</span></div><div id="yui_3_16_0_1_1526826459521_5713"><span><br></span></div><div id="yui_3_16_0_1_1526826459521_5741"><span><br></span></div><div id="yui_3_16_0_1_1526826459521_5740">However, the modes referred to as SSB and DSB are also amplitude modulated signals even though the carrier is suppressed. ACSB (amplitude companded sideband) is another signal that falls in this realm. As such, one can say that all "AM" signals are AM but not all AM signals are "AM". :>)</div><div id="yui_3_16_0_1_1526826459521_5740"><br></div><div id="yui_3_16_0_1_1526826459521_5740"><br></div><div id="yui_3_16_0_1_1526826459521_5740">That is, all "AM" signals are amplitude modulated but not all amplitude modulated signals are "AM"!</div><div id="yui_3_16_0_1_1526826459521_5740"><br></div><div></div><div id="yui_3_16_0_1_1526826459521_5739"> </div><div class="signature" id="yui_3_16_0_1_1526826459521_5738">Glen, K9STH </div><div class="signature" id="yui_3_16_0_1_1526826459521_5738"><br></div><div class="signature" id="yui_3_16_0_1_1526826459521_5738">Website: http://k9sth.net</div><div class="qtdSeparateBR" id="yui_3_16_0_1_1526826459521_5737"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1526826459521_6007" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1526826459521_6006"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1526826459521_6005"> <div dir="ltr" id="yui_3_16_0_1_1526826459521_6004"> <font size="2" face="Arial" id="yui_3_16_0_1_1526826459521_6009"> <hr size="1" id="yui_3_16_0_1_1526826459521_6008"> <b><span style="font-weight:bold;">From:</span></b> Kenneth G. Gordon <kgordon2006@frontier.com><br> <b><span style="font-weight: bold;">To:</span></b> ChrisIwata via Heath <heath@puck.nether.net> <br> <b id="yui_3_16_0_1_1526826459521_6154"><span style="font-weight: bold;" id="yui_3_16_0_1_1526826459521_6153">Sent:</span></b> Saturday, May 19, 2018 9:05 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Heath] SB-200 and AM<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1526826459521_6088"><br><div dir="ltr">On 19 May 2018 at 14:48, ChrisIwata via Heath wrote:<br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6190"><br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6087">> Is there any difference between carrier controlled AM and suppressed carrier DSB?<br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6141"><br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6191">Yes. A HUGE difference. Controlled-carrier AM is, after all, true AM. It has a carrier whose <br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6192">power level follows the average level of the audio. Essentially, the audio controls the <br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6193">amount of power out of the amplifier.<br></div><div dir="ltr"><br></div><div dir="ltr">DSB is not AM. I supposed one could call DSB, "AM-without-the-carrier".<br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6090"><br></div><div dir="ltr">But DSB is far more difficult to implement than CC-AM.<br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6093"><br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6092">For one thing, the "simple" methods of generating DSB require two tubes in the final amp <br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6094">stage, as I remember it. <br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6095"><br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6096">I'll go look it up again just to make sure.<br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6097"><br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6098">Ken W7EKB<br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6117"><br></div><div dir="ltr" id="yui_3_16_0_1_1526826459521_6118"><br></div></div> </div> </div> </div></div></body></html>