Gary, you are 100% technically correct here on this and I will admit to being a little arrogant about the statements. I guess this whole thing is just rubbing me the wrong way. I really am getting to old to put up with changes any more. And boy, nothing is sacred, they even change the names of some streets twice in this mans life time. Once was enough to make me curse and hate lawyers and politicians. HIHI
CUL, John -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gary Schafer Sent: Tuesday, January 17, 2006 8:09 PM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] Web page appears in opposition to RM-11306 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John E. Coleman (ARS WA5BXO) Sent: Tuesday, January 17, 2006 5:11 PM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] Web page appears in opposition to RM-11306 As for measure of power, it was 1KW DC input MAX as measured by the product of plate voltage and plate current meters with a time constants of .25 sec. As long as the product of the two meters did not exceed 1KW then you were legal. Typically, when these conditions were properly monitored, the max output obtainable by a legal SSB station was about 1500 watts PEP. I jokingly say, "the manufactures of SSB desktop equipment were sore about the AM stations that could get 750 to 800 watts of carrier and modulate it to 3000 watts PEP output (SINE WAVE) with out their plate current moving". Not joking, by the use of natural asymmetrical audio I was able to get about 7 KW PEP output with no plate current increase. Also there seemed to be a lot of dummying down of folks about that time. So, 1500 watts PEP output is about the same as ever for a SSB station but was a kick in the teeth for big iron home brewers of AM stations. John, WA5BXO 1500 watts PEP output is not the same as ever for SSB. The SSB guys lost right along with the AM guys on the maximum power level. At 1 kw average, or indicated on the plate meter, average output on SSB is around 600 watts. The PEP level of that much power will range anywhere from 3000 to 5000 watts. Just the same as it will with AM less of course the difference in amplifier efficiency. Watch the output power meter on your SSB rig when it is operated at 100 watts PEP output. The average output (on an average reading wattmeter) will indicate only around 15 to 20 watts unless you are using lots of compression or ALC. When not hitting any ALC the average will be quite low. However in years bygone most people thought that PEP was automatically twice what average power was. That is true with a two tone test signal but of course not with voice. Most amplifiers in those days were not built to deliver much more than 2 kw pep output so most did not realize what they had lost. A lot of folks thought they gained power with the new rules as now you could run around 3000 watts input indicated on the plate meter (in CW) for 1500 watts output. Many were confused about what PEP really was, including the manufacturers if you look at some of the old spec sheets on SSB gear. 73 Gary K4FMX ______________________________________________________________ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
