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Most of what's here deals with opinion, and I'm not getting into that particular dog fight. I will say that the comments for signal bandwidth, 'practicality', and 'good practice', should be re-thought just a bit.
Do any of you happen to remember when th mode designator always included a number? CW was 'A1'. AM was 'A6E or J' IIRC, and so on. Do you happen to know what those numbers were? If you didn't, they were maximum bandwidth for that particular mode. They have not changed even if the mode designators have. Those numbers were in Khz, BTW. Does that tell you something about the acceptable bandwidth with 'AM' mode in the amateur services? It should. I'd also recommend that you NOT take my word for this, research it for your self. While you're doing that, you might also look for the acceptable band widths for FM, as in NFM and WFM, since those designatorsdon't tell you anything about their band width, just that they have one. It's all spelled out somewhere in the rules, you just have to find it. Makes for good practice with other questions like this!
Have fun.
- 'Doc

<blockquote data-quote="W5LZ" data-source="post: 176072" data-attributes="member: 129">Most of what&#039;s here deals with opinion, and I&#039;m not getting into that particular dog fight.&nbsp; I will say that the comments for signal bandwidth, &#039;practicality&#039;, and &#039;good practice&#039;, should be re-thought just a bit.Do any of you happen to remember when th mode designator always included a number?&nbsp; CW was &#039;A1&#039;. AM was &#039;A6E or J&#039; IIRC, and so on.&nbsp; Do you happen to know what those numbers were?&nbsp; If you didn&#039;t, they were maximum bandwidth for that particular mode.&nbsp; They have not changed even if the mode designators have.&nbsp; Those numbers were in Khz, BTW.&nbsp; Does that tell you something about the acceptable bandwidth with &#039;AM&#039; mode in the amateur services?&nbsp; It should.&nbsp; I&#039;d also recommend that you NOT take my word for this, research it for your self.&nbsp; While you&#039;re doing that, you might also look for the acceptable band widths for FM, as in NFM and WFM, since those designatorsdon&#039;t tell you anything about their band width, just that they have one.&nbsp; It&#039;s all spelled out somewhere in the rules, you just have to find it.&nbsp; Makes for good practice with other questions like this!Have fun.&nbsp;- &#039;Doc</blockquote>

[QUOTE="W5LZ, post: 176072, member: 129"] Most of what's here deals with opinion, and I'm not getting into that particular dog fight. I will say that the comments for signal bandwidth, 'practicality', and 'good practice', should be re-thought just a bit. Do any of you happen to remember when th mode designator always included a number? CW was 'A1'. AM was 'A6E or J' IIRC, and so on. Do you happen to know what those numbers were? If you didn't, they were maximum bandwidth for that particular mode. They have not changed even if the mode designators have. Those numbers were in Khz, BTW. Does that tell you something about the acceptable bandwidth with 'AM' mode in the amateur services? It should. I'd also recommend that you NOT take my word for this, research it for your self. While you're doing that, you might also look for the acceptable band widths for FM, as in NFM and WFM, since those designatorsdon't tell you anything about their band width, just that they have one. It's all spelled out somewhere in the rules, you just have to find it. Makes for good practice with other questions like this! Have fun. - 'Doc [/QUOTE]

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