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#1
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What's All Dose Numbers Hams Use
Someone asked:
I hear Hams exchanging numbers -- what do they mean? During a contest, Hams exchange a combined signal report and a number - like 5906 -- the 59 is a signal strength and readability number URL: http://www.cebik.com/rst.html For CW its like 599 last nine is for tone. The 06 is a ITU or CQ zone number. Zone Numbers (CQ and ITU): http://www.cq-amateur-radio.com/wazrules.html and http://www.rsgb-hfc.org.uk/wituz.htm Exchange varies with the contest -- see URL: http://home.online.no/~janalme/hammain.html See rules Serial number reports like 59876 -- the 876 is the 876th contact made. Contests sponsored by 10/10 International use a 10/10 number like 18099 - URL: http://www.ten-ten.org/ For 6M Dxing/Contesting and now some HFing -- folks pass around Grid Square Numbers. I get a lot of JA cards (HF QSO's) wanting grid squares. Example FM16tj. Usually only the FM16 is used in the exchange. So where is FM16 ? Maps and info following will help. (It's Elizabeth City, NC) What are they -- see URL: http://www.arrl.org/locate/gridinfo.html QRZ and Buckmaster will reveal your grid square -- not precise for the last two letters but usually close enough. On QRZ look up your call, then see Detailed Info for your GS. For precision get a GPS reading, then use the AMSAT converter -- http://www.amsat.org/amsat/toys/gridconv.html DX Atlas has a nice grid square locator -- displays a typed in grid number on the maps. http://www.dxatlas.com/ Artsci has Repeater MapBook 10th edition & Repeater Directory With GRID SQUARES on every U.S. Map! http://www.artscipub.com/mapbook/ ICOM Site Has a grid Map at URL: http://www.icomamerica.com/amateur/index.html Click on AMATEUR, then U.S. Grid Square Map (470 KB PDF) Another At http://www.amt.org/Multimedia/images/grid-na.gif Another at URL: http://pages.infinit.net/ve2pij/gridqra.html And the ARRL offers the VUCC Award based on grid squares -- see URL: http://www.arrl.org/awards/#vucc Passin The Good Numbers -- 73 Anon to keep Jim from Spamming and Harrassing me ! Jamesx that is. |
#2
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Someone asked:
I hear Hams exchanging numbers -- what do they mean? During a contest, Hams exchange a combined signal report and a number - like 5906 -- the 59 is a signal strength and readability number URL: http://www.cebik.com/rst.html For CW its like 599 last nine is for tone. The 06 is a ITU or CQ zone number. Zone Numbers (CQ and ITU): http://www.cq-amateur-radio.com/wazrules.html and http://www.rsgb-hfc.org.uk/wituz.htm Exchange varies with the contest -- see URL: http://home.online.no/~janalme/hammain.html See rules Serial number reports like 59876 -- the 876 is the 876th contact made. Contests sponsored by 10/10 International use a 10/10 number like 18099 - URL: http://www.ten-ten.org/ For 6M Dxing/Contesting and now some HFing -- folks pass around Grid Square Numbers. I get a lot of JA cards (HF QSO's) wanting grid squares. Example FM16tj. Usually only the FM16 is used in the exchange. So where is FM16 ? Maps and info following will help. (It's Elizabeth City, NC) What are they -- see URL: http://www.arrl.org/locate/gridinfo.html QRZ and Buckmaster will reveal your grid square -- not precise for the last two letters but usually close enough. On QRZ look up your call, then see Detailed Info for your GS. For precision get a GPS reading, then use the AMSAT converter -- http://www.amsat.org/amsat/toys/gridconv.html DX Atlas has a nice grid square locator -- displays a typed in grid number on the maps. http://www.dxatlas.com/ Artsci has Repeater MapBook 10th edition & Repeater Directory With GRID SQUARES on every U.S. Map! http://www.artscipub.com/mapbook/ ICOM Site Has a grid Map at URL: http://www.icomamerica.com/amateur/index.html Click on AMATEUR, then U.S. Grid Square Map (470 KB PDF) Another At http://www.amt.org/Multimedia/images/grid-na.gif Another at URL: http://pages.infinit.net/ve2pij/gridqra.html And the ARRL offers the VUCC Award based on grid squares -- see URL: http://www.arrl.org/awards/#vucc Passin The Good Numbers -- 73 Anon to keep Jim from Spamming and Harrassing me ! Jamesx that is. |
#3
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A Ham Elmer wrote:
Someone asked: I hear Hams exchanging numbers -- what do they mean? During a contest, Hams exchange a combined signal report and a number - like 5906 -- the 59 is a signal strength and readability number URL: http://www.cebik.com/rst.html The basis for the S-unit is presumed to be as follows: S9 corresponds to 100 microvolts "open-circuit" from a 50 ohm generator. This corresponds to a 50 microvolt reading on the signal generator meter scale. It also corresponds to -73 dBm in terms of an "available power" level. The signal generator scale markings coincide with this. Everyone seems to agree about this much. However, this does not mean that the actual signal level into the receiver is 50 microvolts, because we very seldom know the actual input impedance of the receiver. Using "available" and "open-circuit" we do not need to know the input impedance of the receiver. The receiver is designed to operate from a 50 ohm generator and that knowledge is sufficient. The number of dB in an S-unit below the S9 level is not, as many believe, guaranteed to be 6 dB per S-unit. Different manufacturers have used numbers as low as an "average" of 4 dB (Collins for example). In vacuum tube receivers especially, some latitude has always been necessary. In my homebrew solid-state receiver (2003 design) I use 5 dB because that correlates with the "intuitive" evaluations that I have developed over the years (that is my option for my personal receiver). My S-meter, using precision circuitry, is closely calibrated and marked based on accurate sig gen readings. Also, my receiver gain does not vary more than 1 dB across any ham band and 2 dB from the 160 to 10 meter bands because of the way the receiver is designed. This calibration is quite stable and reliable. I check it frequently. A picture of my homebrew receiver is on QRZ.COM(W0IYH). Note the large high-quality analog S-meter. Bill W0IYH |
#4
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A Ham Elmer wrote:
Someone asked: I hear Hams exchanging numbers -- what do they mean? During a contest, Hams exchange a combined signal report and a number - like 5906 -- the 59 is a signal strength and readability number URL: http://www.cebik.com/rst.html The basis for the S-unit is presumed to be as follows: S9 corresponds to 100 microvolts "open-circuit" from a 50 ohm generator. This corresponds to a 50 microvolt reading on the signal generator meter scale. It also corresponds to -73 dBm in terms of an "available power" level. The signal generator scale markings coincide with this. Everyone seems to agree about this much. However, this does not mean that the actual signal level into the receiver is 50 microvolts, because we very seldom know the actual input impedance of the receiver. Using "available" and "open-circuit" we do not need to know the input impedance of the receiver. The receiver is designed to operate from a 50 ohm generator and that knowledge is sufficient. The number of dB in an S-unit below the S9 level is not, as many believe, guaranteed to be 6 dB per S-unit. Different manufacturers have used numbers as low as an "average" of 4 dB (Collins for example). In vacuum tube receivers especially, some latitude has always been necessary. In my homebrew solid-state receiver (2003 design) I use 5 dB because that correlates with the "intuitive" evaluations that I have developed over the years (that is my option for my personal receiver). My S-meter, using precision circuitry, is closely calibrated and marked based on accurate sig gen readings. Also, my receiver gain does not vary more than 1 dB across any ham band and 2 dB from the 160 to 10 meter bands because of the way the receiver is designed. This calibration is quite stable and reliable. I check it frequently. A picture of my homebrew receiver is on QRZ.COM(W0IYH). Note the large high-quality analog S-meter. Bill W0IYH |
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