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STATION IS ON 13.556.00 MHz. LSB
Omega One Radio is on the air now on 13.556.00 MHz on Lower Side band.
We have fixed the audio so the audio is a lot stronger now, then before. Todd Daugherty N9OGL OMEGA ONE RADIO 13.556.00 MHz. LSB Omega One Radio Blog http://n9ogl.blogspot.com |
STATION IS ON 13.556.00 MHz. LSB
are you using an ex Ham transmitter?
I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, |
STATION IS ON 13.556.00 MHz. LSB
wrote in message ... are you using an ex Ham transmitter? I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, .................................................. ..................... Transmitting on illegal frequencies with an illegal transceiver? Only stupid Toad would do that. Gather around the legal frequencies this evening at 14.331 as we get a forum of LEGAL Hams together to discuss the nefarious activities of Toad and Roger. Look for this forum to begin on or about nine p.m. eastern time. Toad cannot join in, nor can KB9RQZ, since they are not licensed for this freq. Roger needs no invitation...he will lurk and jam as he sees fit. |
STATION IS ON 13.556.00 MHz. LSB
Lloyd Davies posting as "Not Lloyd" wrote:
Gather around the legal frequencies this evening at 14.331 as we get a forum of LEGAL Hams together to discuss the nefarious activities of Toad and Roger. Look for this forum to begin on or about nine p.m. eastern time. Toad cannot join in, nor can KB9RQZ, since they are not licensed for this freq. Roger needs no invitation...he will lurk and jam as he sees fit. How the **** do you do that with a tech license Davies, you fat ****stain? |
STATION IS ON 13.556.00 MHz. LSB
Brenda Ann wrote: "Not Lloyd" wrote in message ... wrote in message ... are you using an ex Ham transmitter? I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, .................................................. .................... Transmitting on illegal frequencies with an illegal transceiver? Only stupid Toad would do that. The frequency he is using is legal with an output of 10000uV/m at 30m. That's a pretty good signal just to play with. This can go quite a long ways via skywave, and even a good distance via ground wave with a sensitive receiver. That's up in the HiFer band. Lots of beacons operating up there with very low power. http://www.lwca.org/sitepage/part15/ dxAce Michigan USA |
STATION IS ON 13.556.00 MHz. LSB
dxAce wrote: Brenda Ann wrote: "Not Lloyd" wrote in message ... wrote in message ... are you using an ex Ham transmitter? I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, .................................................. .................... Transmitting on illegal frequencies with an illegal transceiver? Only stupid Toad would do that. The frequency he is using is legal with an output of 10000uV/m at 30m. That's a pretty good signal just to play with. This can go quite a long ways via skywave, and even a good distance via ground wave with a sensitive receiver. That's up in the HiFer band. Lots of beacons operating up there with very low power. http://www.lwca.org/sitepage/part15/ At 1215 I can copy the 'HI' beacon operating around 13558 out of Connecticut. dxAce Michigan USA |
STATION IS ON 13.556.00 MHz. LSB
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STATION IS ON 13.556.00 MHz. LSB
"N9OGL" wrote in message ups.com... Omega One Radio is on the air now on 13.556.00 MHz on Lower Side band. We have fixed the audio so the audio is a lot stronger now, then before. Todd Daugherty N9OGL OMEGA ONE RADIO 13.556.00 MHz. LSB Omega One Radio Blog http://n9ogl.blogspot.com When ? I don't hear nothin'. k35454 |
STATION IS ON 13.556.00 MHz. LSB
k35454 wrote: "N9OGL" wrote in message ups.com... Omega One Radio is on the air now on 13.556.00 MHz on Lower Side band. We have fixed the audio so the audio is a lot stronger now, then before. Todd Daugherty N9OGL OMEGA ONE RADIO 13.556.00 MHz. LSB Omega One Radio Blog http://n9ogl.blogspot.com When ? I don't hear nothin'. k35454 well if you truly hear nothing why do yuo exoect t Todd's station? |
STATION IS ON 13.556.00 MHz. LSB
"N9OGL" wrote in
ups.com: Omega One Radio is on the air now on 13.556.00 MHz on Lower Side band. We have fixed the audio so the audio is a lot stronger now, then before. Todd Daugherty N9OGL OMEGA ONE RADIO 13.556.00 MHz. LSB Omega One Radio Blog http://n9ogl.blogspot.com What is the content? |
STATION IS ON 13.556.00 MHz. LSB
Slow Code wrote: "N9OGL" wrote in ups.com: What is the content? not cw I suspect so move on unless you are going accuse him of amime jpg uu3ncoded by means of morse |
STATION IS ON 13.556.00 MHz. LSB
dxAce wrote in
: N9OGL wrote: Not Lloyd wrote: wrote in message ... are you using an ex Ham transmitter? I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, .................................................. .................... Transmitting on illegal frequencies with an illegal transceiver? Only stupid Toad would do that. Gather around the legal frequencies this evening at 14.331 as we get a forum of LEGAL Hams together to discuss the nefarious activities of Toad and Roger. Look for this forum to begin on or about nine p.m. eastern time. Toad cannot join in, nor can KB9RQZ, since they are not licensed for this freq. Roger needs no invitation...he will lurk and jam as he sees fit. Before you go around spouting that I'm running illegal, I would suggestion that you read Part 15 (47 CFR 15) but more to the point 47 CFR 15.225 How much power you running? Unable to hear you here, but I'll give a listen again tomorrow if you're still up and running. 10000uV/m at 30m is the maximum. How much power into an isotropic radiator give 10000uV/m at 30m. Of course, when the antenna has gain, power has to be reduced to avoid illegal operation. |
STATION IS ON 13.556.00 MHz. LSB
Slow Code wrote:
dxAce wrote in : N9OGL wrote: Not Lloyd wrote: wrote in message ... are you using an ex Ham transmitter? I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, .............................................. ........................ Transmitting on illegal frequencies with an illegal transceiver? Only stupid Toad would do that. Gather around the legal frequencies this evening at 14.331 as we get a forum of LEGAL Hams together to discuss the nefarious activities of Toad and Roger. Look for this forum to begin on or about nine p.m. eastern time. Toad cannot join in, nor can KB9RQZ, since they are not licensed for this freq. Roger needs no invitation...he will lurk and jam as he sees fit. Before you go around spouting that I'm running illegal, I would suggestion that you read Part 15 (47 CFR 15) but more to the point 47 CFR 15.225 How much power you running? Unable to hear you here, but I'll give a listen again tomorrow if you're still up and running. 10000uV/m at 30m is the maximum. How much power into an isotropic radiator give 10000uV/m at 30m. Of course, when the antenna has gain, power has to be reduced to avoid illegal operation. My guess is 3 mW. John |
STATION IS ON 13.556.00 MHz. LSB
Brenda Ann wrote:
"John - KD5YI" wrote in message . . . My guess is 3 mW. John The level is the same as emissions within the CB band: Sec. 15.227 Operation within the band 26.96-27.28 MHz. (a) The field strength of any emission within this band shall not exceed 10,000 microvolts/meter at 3 meters. The emission limit in this paragraph is based on measurement instrumentation employing an average detector. The provisions in Sec. 15.35 for limiting peak emissions apply. . . . The amount of power applied to an isotropic radiator which will generate 10,000 uV/m at 3 meters is 30 microwatts. This assumes that the 3 meter distance is in the far field, or that it's measured in the far field and extrapolated to 3 meters as though 3 meters were in the far field, which is the method and assumption used by the FCC. A simple dipole reduces the permissible power to about 23 uW, and ground reflections will typically nearly double the field strength, so a safe power level would be about 6 microwatts into a dipole antenna over ground for someone interested in conforming to the regulations. Roy Lewallen, W7EL |
STATION IS ON 13.556.00 MHz. LSB
Roy Lewallen wrote:
Brenda Ann wrote: "John - KD5YI" wrote in message . . . My guess is 3 mW. John The level is the same as emissions within the CB band: Sec. 15.227 Operation within the band 26.96-27.28 MHz. (a) The field strength of any emission within this band shall not exceed 10,000 microvolts/meter at 3 meters. The emission limit in this paragraph is based on measurement instrumentation employing an average detector. The provisions in Sec. 15.35 for limiting peak emissions apply. . . . The amount of power applied to an isotropic radiator which will generate 10,000 uV/m at 3 meters is 30 microwatts. This assumes that the 3 meter distance is in the far field, or that it's measured in the far field and extrapolated to 3 meters as though 3 meters were in the far field, which is the method and assumption used by the FCC. A simple dipole reduces the permissible power to about 23 uW, and ground reflections will typically nearly double the field strength, so a safe power level would be about 6 microwatts into a dipole antenna over ground for someone interested in conforming to the regulations. Roy Lewallen, W7EL Hey, Roy - My 3 mW answer was for 30 meters. I think that ratios correctly to your 30 microwatts at 3 meters. Yes? John |
STATION IS ON 13.556.00 MHz. LSB
John - KD5YI wrote:
Hey, Roy - My 3 mW answer was for 30 meters. I think that ratios correctly to your 30 microwatts at 3 meters. Yes? Yep, that's right. And I finally got curious enough to look up the actual regulation. According to section 15.225(a), intentional radiators at 13.553-13.567 MHz are allowed 15,848 uV/m at 30 meters, which is about 4.75 mW to an isotropic antenna in free space. There's also a 0.01% frequency stability requirement which would imply crystal control. And any emissions extending outside the band have to be about 54 dB lower, 30 uV/m at 30 m. Roy Lewallen, W7EL |
STATION IS ON 13.556.00 MHz. LSB
Roy Lewallen wrote in
: John - KD5YI wrote: Hey, Roy - My 3 mW answer was for 30 meters. I think that ratios correctly to your 30 microwatts at 3 meters. Yes? Yep, that's right. And I finally got curious enough to look up the actual regulation. According to section 15.225(a), intentional radiators at 13.553-13.567 MHz are allowed 15,848 uV/m at 30 meters, which is about 4.75 mW to an isotropic antenna in free space. There's also a 0.01% frequency stability requirement which would imply crystal control. And any emissions extending outside the band have to be about 54 dB lower, 30 uV/m at 30 m. Roy Lewallen, W7EL So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC |
STATION IS ON 13.556.00 MHz. LSB
So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC I can copy perhaps 8 beacons on 13.555 MHz from all across the U.S. Assuming they too are running the power level Roy calculated, N9OGL's beacon should also be copyable. Dale W4OP |
STATION IS ON 13.556.00 MHz. LSB
Slow Code wrote: Roy Lewallen wrote in : So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC Not true. I have an AM "beacon" running some test groups smack dab in the middle of the HiFer/ISM 22M allocation. At maximum power I am at the legal limit. Most of my tests are -20dB from that level and I have copied my "becaon" from over 100 miles away twice. I was -6dB down from max, and was rather shocked. Don't rule out the odd fluke path. If you ever hear a YL reading a set of word pairs each followed by a ID nubmber in cut morse, that is my odd little station. I normally keep the power -63dB down from max legal, and only boast it while actually conducting tests. Terry in central KY |
STATION IS ON 13.556.00 MHz. LSB
wrote in message oups.com... Slow Code wrote: Roy Lewallen wrote in : So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC Not true. I have an AM "beacon" running some test groups smack dab in the middle of the HiFer/ISM 22M allocation. At maximum power I am at the legal limit. Most of my tests are -20dB from that level and I have copied my "becaon" from over 100 miles away twice. I was -6dB down from max, and was rather shocked. Don't rule out the odd fluke path. If you ever hear a YL reading a set of word pairs each followed by a ID nubmber in cut morse, that is my odd little station. I normally keep the power -63dB down from max legal, and only boast it while actually conducting tests. Terry in central KY Give me the exact frequency Terry. Dale W4OP |
STATION IS ON 13.556.00 MHz. LSB
"Dale Parfitt" wrote in
news:R0aCg.15333$l95.9940@trnddc08: So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC I can copy perhaps 8 beacons on 13.555 MHz from all across the U.S. Assuming they too are running the power level Roy calculated, N9OGL's beacon should also be copyable. Dale W4OP You don't need to tell me the strengths of CW. I'm a CW advocate. Just listen to the NCDXF beacons on 14.100. You can easily hear the 100mW tone all over the world when there is propagation with a simple antenna. I'm just saying the RF Todd is puting into his antenna has to be quit low if he is transmitting legal power wise. Sc |
STATION IS ON 13.556.00 MHz. LSB
Dale Parfitt wrote: Give me the exact frequency Terry. Dale W4OP 13.560000MHz. Smack dab in the middle of the HiFer/ISM allocation. It is usually up on Saturday morning when I do some tests. Terry |
STATION IS ON 13.556.00 MHz. LSB
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STATION IS ON 13.556.00 MHz. LSB
Roy Lewallen wrote: John - KD5YI wrote: Hey, Roy - My 3 mW answer was for 30 meters. I think that ratios correctly to your 30 microwatts at 3 meters. Yes? Yep, that's right. And I finally got curious enough to look up the actual regulation. According to section 15.225(a), intentional radiators at 13.553-13.567 MHz are allowed 15,848 uV/m at 30 meters, which is about 4.75 mW to an isotropic antenna in free space. There's also a 0.01% frequency stability requirement which would imply crystal control. And any emissions extending outside the band have to be about 54 dB lower, 30 uV/m at 30 m. Roy Lewallen, W7EL Do what??? The power output can vary depending on a number of things including coax and antenna, you can run 1,000 watts and come up 10,000 uV/meter at a distance of 30 meters. As the FCC Office of Engineering and Technology has stated in their bulletin which deals with Part 15. "What is the relationship between "microvolts per meter" and Watts? Watts are the units used to describe the amount of power generated by a transmitter. Microvolts per meter (µV/m) are the units used to describe the strength of an electric field created by the operation of a transmitter. A particular transmitter that generates a constant level of power (Watts) can produce electric fields of different strengths (µV/m) depending on, among other things, the type of transmission line and antenna connected to it. Because it is the electric field that causes interference to authorized radio communications, and since a particular electric field strength does not directly correspond to a particular level of transmitter power, most of the Part 15 emission limits are specified in field strength." Todd N9OGL OMEGA ONE BROADCASTING |
STATION IS ON 13.556.00 MHz. LSB
Brenda Ann wrote: "John - KD5YI" wrote in message news:AqTBg.55239$Lh4.46900@trnddc02... Slow Code wrote: dxAce wrote in : N9OGL wrote: Not Lloyd wrote: wrote in message ... are you using an ex Ham transmitter? I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, ............................................. ......................... Transmitting on illegal frequencies with an illegal transceiver? Only stupid Toad would do that. Gather around the legal frequencies this evening at 14.331 as we get a forum of LEGAL Hams together to discuss the nefarious activities of Toad and Roger. Look for this forum to begin on or about nine p.m. eastern time. Toad cannot join in, nor can KB9RQZ, since they are not licensed for this freq. Roger needs no invitation...he will lurk and jam as he sees fit. Before you go around spouting that I'm running illegal, I would suggestion that you read Part 15 (47 CFR 15) but more to the point 47 CFR 15.225 How much power you running? Unable to hear you here, but I'll give a listen again tomorrow if you're still up and running. 10000uV/m at 30m is the maximum. How much power into an isotropic radiator give 10000uV/m at 30m. Of course, when the antenna has gain, power has to be reduced to avoid illegal operation. My guess is 3 mW. John The level is the same as emissions within the CB band: Sec. 15.227 Operation within the band 26.96-27.28 MHz. (a) The field strength of any emission within this band shall not exceed 10,000 microvolts/meter at 3 meters. The emission limit in this paragraph is based on measurement instrumentation employing an average detector. The provisions in Sec. 15.35 for limiting peak emissions apply. (b) The field strength of any emissions which appear outside of this band shall not exceed the general radiated emission limits in Sec. 15.209. I don't know that there is a difference anymore between Part 95 and Part 15 emissions in the CB band... the old Part 15, back when a license was required, used to be 100mW. PART 15 in the CB band is 10,000 uV/meter @ 3 meter (100 mw).(Walkie talkies and cordless phones are also 10,000 uV/meter @3 meters) While on 13 MHz it's 10,000 uV/meter @ 30 meters or about 1.8 watts at 100 feet. Todd N9OGL OMEGA ONE RADIO |
STATION IS ON 13.556.00 MHz. LSB
"Slow Code" wrote in message nk.net... "Dale Parfitt" wrote in news:R0aCg.15333$l95.9940@trnddc08: So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC I can copy perhaps 8 beacons on 13.555 MHz from all across the U.S. Assuming they too are running the power level Roy calculated, N9OGL's beacon should also be copyable. Dale W4OP You don't need to tell me the strengths of CW. I'm a CW advocate. Just listen to the NCDXF beacons on 14.100. You can easily hear the 100mW tone all over the world when there is propagation with a simple antenna. I'm just saying the RF Todd is puting into his antenna has to be quit low if he is transmitting legal power wise. Sc I too enjoy CW- probably 90% of my operating. My comment was that if his ERP is the same as the other beacons, then he will be heard well beyond "across the street". W4OP |
STATION IS ON 13.556.00 MHz. LSB
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STATION IS ON 13.556.00 MHz. LSB
N9OGL wrote:
Roy Lewallen wrote: John - KD5YI wrote: Hey, Roy - My 3 mW answer was for 30 meters. I think that ratios correctly to your 30 microwatts at 3 meters. Yes? Yep, that's right. And I finally got curious enough to look up the actual regulation. According to section 15.225(a), intentional radiators at 13.553-13.567 MHz are allowed 15,848 uV/m at 30 meters, which is about 4.75 mW to an isotropic antenna in free space. There's also a 0.01% frequency stability requirement which would imply crystal control. And any emissions extending outside the band have to be about 54 dB lower, 30 uV/m at 30 m. Roy Lewallen, W7EL Do what??? The power output can vary depending on a number of things including coax and antenna, you can run 1,000 watts and come up 10,000 uV/meter at a distance of 30 meters. As the FCC Office of Engineering and Technology has stated in their bulletin which deals with Part 15. "What is the relationship between "microvolts per meter" and Watts? Watts are the units used to describe the amount of power generated by a transmitter. Microvolts per meter (µV/m) are the units used to describe the strength of an electric field created by the operation of a transmitter. A particular transmitter that generates a constant level of power (Watts) can produce electric fields of different strengths (µV/m) depending on, among other things, the type of transmission line and antenna connected to it. Because it is the electric field that causes interference to authorized radio communications, and since a particular electric field strength does not directly correspond to a particular level of transmitter power, most of the Part 15 emission limits are specified in field strength." Todd N9OGL OMEGA ONE BROADCASTING C'mon, Todd. He qualified it by saying "4.75 mW to an isotropic antenna in free space." It is just a way to get a "feel" for how much power might be required based on the FCC uV/m limit under certain theoretical conditions. I would start with a calculation like this if I were designing a transmitter whose signal has to meet those limits. I think that would be better than starting with a 1000W transmitter when only a few milliwatts is required. When was the last time you used an isotropic antenna? How was your trip to free space? John |
STATION IS ON 13.556.00 MHz. LSB
N9OGL wrote:
Brenda Ann wrote: "John - KD5YI" wrote in message news:AqTBg.55239$Lh4.46900@trnddc02... Slow Code wrote: dxAce wrote in : N9OGL wrote: Not Lloyd wrote: wrote in message ... are you using an ex Ham transmitter? I hear with LSB/USB get further than AM but is the LSB really wide enough for quality audio? Got a grandpappys MP1000 here that will rag 50 watts AM all day long, but the band width is to narrow for anything like nice music audio... Speech is nice though. Maybe there is a wider AM filter than stock, some Ham wizardry to make it fit a decent audio element on to the carrier, ........................................... ........................... Transmitting on illegal frequencies with an illegal transceiver? Only stupid Toad would do that. Gather around the legal frequencies this evening at 14.331 as we get a forum of LEGAL Hams together to discuss the nefarious activities of Toad and Roger. Look for this forum to begin on or about nine p.m. eastern time. Toad cannot join in, nor can KB9RQZ, since they are not licensed for this freq. Roger needs no invitation...he will lurk and jam as he sees fit. Before you go around spouting that I'm running illegal, I would suggestion that you read Part 15 (47 CFR 15) but more to the point 47 CFR 15.225 How much power you running? Unable to hear you here, but I'll give a listen again tomorrow if you're still up and running. 10000uV/m at 30m is the maximum. How much power into an isotropic radiator give 10000uV/m at 30m. Of course, when the antenna has gain, power has to be reduced to avoid illegal operation. My guess is 3 mW. John The level is the same as emissions within the CB band: Sec. 15.227 Operation within the band 26.96-27.28 MHz. (a) The field strength of any emission within this band shall not exceed 10,000 microvolts/meter at 3 meters. The emission limit in this paragraph is based on measurement instrumentation employing an average detector. The provisions in Sec. 15.35 for limiting peak emissions apply. (b) The field strength of any emissions which appear outside of this band shall not exceed the general radiated emission limits in Sec. 15.209. I don't know that there is a difference anymore between Part 95 and Part 15 emissions in the CB band... the old Part 15, back when a license was required, used to be 100mW. PART 15 in the CB band is 10,000 uV/meter @ 3 meter (100 mw).(Walkie talkies and cordless phones are also 10,000 uV/meter @3 meters) While on 13 MHz it's 10,000 uV/meter @ 30 meters or about 1.8 watts at 100 feet. Todd N9OGL OMEGA ONE RADIO You are wrong about the FCC limits on 13 MHz. There is no mention of 10,000 uV/m. Here are the limits: Sec. 15.225 Operation within the band 13.110-14.010 MHz. (a) The field strength of any emissions within the band 13.553- 13.567 MHz shall not exceed 15,848 microvolts/meter at 30 meters. (b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the field strength of any emissions shall not exceed 334 microvolts/meter at 30 meters. (c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the field strength of any emissions shall not exceed 106 microvolts/meter at 30 meters. You are also wrong about the power level required to achieve these limits. The power required is much lower. Cheers, John |
STATION IS ON 13.556.00 MHz. LSB
ok,so much for that station.
cuhulin |
STATION IS ON 13.556.00 MHz. LSB
John - KD5YI wrote: You are wrong about the FCC limits on 13 MHz. There is no mention of 10,000 uV/m. Here are the limits: Sec. 15.225 Operation within the band 13.110-14.010 MHz. (a) The field strength of any emissions within the band 13.553- 13.567 MHz shall not exceed 15,848 microvolts/meter at 30 meters. (b) Within the bands 13.410-13.553 MHz and 13.567-13.710 MHz, the field strength of any emissions shall not exceed 334 microvolts/meter at 30 meters. (c) Within the bands 13.110-13.410 MHz and 13.710-14.010 MHz the field strength of any emissions shall not exceed 106 microvolts/meter at 30 meters. You are also wrong about the power level required to achieve these limits. The power required is much lower. Cheers, John There appear to be two sets of part 15.225 rules floating around. http://frwebgate.access.gpo.gov/cgi-bin/get-cfr.cgi?TITLE=47&PART=15&SECTION=225&YEAR=2001&TYP E=TEXT shows: "[Code of Federal Regulations] [Title 47, Volume 1] [Revised as of October 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR15.225] [Page 726] TITLE 47--TELECOMMUNICATION CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION PART 15--RADIO FREQUENCY DEVICES--Table of Contents Subpart C--Intentional Radiators Sec. 15.225 Operation within the band 13.553-13.567 MHz. (a) The field strength of any emissions within this band shall not exceed 10,000 microvolts/meter at 30 meters. (b) The field strength of any emissions appearing outside of this band shall not exceed the general radiated emission limits shown in Sec. 15.209. (c) The frequency tolerance of the carrier signal shall be maintained within plus-minus0.01% of the operating frequency over a temperature variation of -20 degrees to +50 degrees C at normal supply voltage, and for a variation in the primary supply voltage from 85% to 115% of the rated supply voltage at a temperature of 20 degrees C. For battery operated equipment, the equipment tests shall be performed using a new battery." And http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet63/oet63rev.pdf Also shows the 10,000uV/M at 30M Yet http://www.sss-mag.com/pdf/part15-91905.pdf Dated sept 2005, shows the limits you quoted. What is troubling is the FCC has different specs on different documents at fcc.gov. Buy regardless of runinng 10,000uV or 15,848uV, one does NOT need a 100W transmitter to reach either of these levels. I have a 2W unit followed by a step attenuator coupled to a bufffer with a Zin of 50 Ohms and a Z Out of ~500. The buffer transistor is a 250mW and isn't even warm. This was the only easy way to allow the attenuator to accurately step the power level down. By the 15,848uV I guess I could increase my power from 5,000uV, to allow for the energy in the sidebands, to something like 10,000uV. Oh whoopy gea! Too much trouble to even think about changing as I had to back the exciter down to something like 1/2W to reach the 5,000uV level. Crystal Oscillator-buffer#1-amplifier-?20dB pad-step attenuator-buffer#2-matching- very poor radiator. I would guess I am running maybe 5mW into a modified CB ground plane antenna. Serious mismatch, but my "beacon" was only intended to reach about 1 mile. For an S2 reading I had to back the power down ~50% from max legal. So assume I am running 2.5mW with no attenuation, so for extra credit, what is my power level at -63dB? Terry |
STATION IS ON 13.556.00 MHz. LSB
Dale Parfitt wrote: "Slow Code" wrote in message nk.net... "Dale Parfitt" wrote in news:R0aCg.15333$l95.9940@trnddc08: So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC I can copy perhaps 8 beacons on 13.555 MHz from all across the U.S. Assuming they too are running the power level Roy calculated, N9OGL's beacon should also be copyable. Dale W4OP You don't need to tell me the strengths of CW. I'm a CW advocate. Just listen to the NCDXF beacons on 14.100. You can easily hear the 100mW tone all over the world when there is propagation with a simple antenna. I'm just saying the RF Todd is puting into his antenna has to be quit low if he is transmitting legal power wise. Sc I too enjoy CW- probably 90% of my operating. My comment was that if his ERP is the same as the other beacons, then he will be heard well beyond "across the street". The beacon 'HI' is my regular here. Operating on 13558v in CW from Connecticut. Audible at 1545. dxAce Michigan USA |
STATION IS ON 13.556.00 MHz. LSB
That Bell South womans washing machine next door works real good.I slip
over there and I wash my filthy nasty clothes and she and that other woman doesn't know anything about it,yet. cuhulin |
STATION IS ON 13.556.00 MHz. LSB
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STATION IS ON 13.556.00 MHz. LSB
"Dale Parfitt" wrote in
news:CKFCg.56002$gU4.47279@trnddc07: "Slow Code" wrote in message nk.net... "Dale Parfitt" wrote in news:R0aCg.15333$l95.9940@trnddc08: So if N9OGL's transmitions are legal power wise, he would basically be broadcasting for the kids across the street. Maybe he could take song requests. They can just shout out their front doors what songs they want him to play. SC I can copy perhaps 8 beacons on 13.555 MHz from all across the U.S. Assuming they too are running the power level Roy calculated, N9OGL's beacon should also be copyable. Dale W4OP You don't need to tell me the strengths of CW. I'm a CW advocate. Just listen to the NCDXF beacons on 14.100. You can easily hear the 100mW tone all over the world when there is propagation with a simple antenna. I'm just saying the RF Todd is puting into his antenna has to be quit low if he is transmitting legal power wise. Sc I too enjoy CW- probably 90% of my operating. My comment was that if his ERP is the same as the other beacons, then he will be heard well beyond "across the street". W4OP I'll try to copy a few of those beacons. Maybe there is info on about the stations, and possible they have a waiver for an increase in power or antenna size. Sc |
STATION IS ON 13.556.00 MHz. LSB
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STATION IS ON 13.556.00 MHz. LSB
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STATION IS ON 13.556.00 MHz. LSB
John - KD5YI wrote: wrote: I would guess I am running maybe 5mW into a modified CB ground plane antenna. Serious mismatch, but my "beacon" was only intended to reach about 1 mile. For an S2 reading I had to back the power down ~50% from max legal. So assume I am running 2.5mW with no attenuation, so for extra credit, what is my power level at -63dB? Terry Your question makes no sense. What is the reference level? 1 watt, 1 mW, 5 mW, 2.5 mW? .5 microwatts is 63 dB below a Watt. .5 nanowatts is 63 dB below a milliwatt. 2.5 nanowatts is 63 dB below 5 milliwatts. 1.25 nanowatts is 63 dB below 2.5 milliwatts. (Is this the one you want?) 2.5 milliwatts is 3 dB below 5 milliwatts. See a pattern in any of this? Once again I see why I should not take up comedy. It wasn't a serious question. I was reffereing to 5mW at 50 Ohms. Terry |
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