hambasics:sections:intro
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| hambasics:sections:intro [2025/08/29 16:08] – [Certificate Qualifications Overview] va7fi | hambasics:sections:intro [2026/07/10 09:35] (current) – [Certificate Qualifications Overview] va7fi | ||
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| ====== Intro to Radio Waves ====== | ====== Intro to Radio Waves ====== | ||
| - | Before we can start discussing Amateur | + | Before we can start discussing Amateur (Ham) Radio, we need to talk a little bit about radio waves. |
| Imagine the radio in your car could not only listen but also transmit on any frequency you like. What would happen as you move up and down the dial? | Imagine the radio in your car could not only listen but also transmit on any frequency you like. What would happen as you move up and down the dial? | ||
| Line 12: | Line 12: | ||
| <WRAP round tip center box 80%> | <WRAP round tip center box 80%> | ||
| - | At this point, you should start thinking about the relationship between MHz, kHz, and Hz. We'll add more to the list below. | + | At this point, you should start thinking about the relationship between MHz, kHz, and Hz. |
| </ | </ | ||
| Line 21: | Line 21: | ||
| * Between 790 THz and 30 PHz (30,000 THz) you'd create UV rays, which are invisible but could blind you. | * Between 790 THz and 30 PHz (30,000 THz) you'd create UV rays, which are invisible but could blind you. | ||
| * Between 30 PHz and 30 EHz (30,000 PHz) you'd create X-rays, which we could be used to take pictures of your bones. | * Between 30 PHz and 30 EHz (30,000 PHz) you'd create X-rays, which we could be used to take pictures of your bones. | ||
| - | * And passed | + | * And beyond |
| ===== Electromagnetic Spectrum ===== | ===== Electromagnetic Spectrum ===== | ||
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| This is important because different modes have different bandwidth requirements. | This is important because different modes have different bandwidth requirements. | ||
| - | + | <WRAP group> | |
| - | {{ scope01.png}} | + | < |
| - | < | + | |
| |< 300px >| | |< 300px >| | ||
| ^Mode ^Required Bandwidth | | ^Mode ^Required Bandwidth | | ||
| Line 115: | Line 114: | ||
| |FM Voice |20 kHz | | |FM Voice |20 kHz | | ||
| |Fast Scan TV |6 MHz | | |Fast Scan TV |6 MHz | | ||
| - | </ | ||
| + | </ | ||
| + | <WRAP half column> | ||
| + | {{scope01.png}} | ||
| We'll look at that picture in more details soon, but for now, let's just point out how the AM signal is twice as wide as the SSB signal. | We'll look at that picture in more details soon, but for now, let's just point out how the AM signal is twice as wide as the SSB signal. | ||
| + | </ | ||
| + | </ | ||
| ===== Certificate Qualifications Overview ===== | ===== Certificate Qualifications Overview ===== | ||
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| <WRAP indent> | <WRAP indent> | ||
| ^Privilege | ^Privilege | ||
| - | ^Frequencies above 30 MHz | <fc #008000>Y</ | + | ^Frequencies above 30 MHz | <fc #008000>✔</ |
| - | ^Power up to 250 W | + | ^Power up to 250 W |
| - | ^Frequencies below 30 MHz | <fc #ff0000>N</ | + | ^Frequencies below 30 MHz | <fc #ff0000>✘</ |
| - | ^Power up to 1 kW | <fc #ff0000>N</ | + | ^Power up to 1 kW | <fc #ff0000>✘</ |
| - | ^Build or Modify Radios | + | ^Build or Modify Radios |
| - | ^Manage a repeater | + | ^Manage a repeater |
| - | ^Remote Control Radios | + | ^Remote Control Radios |
| </ | </ | ||
| + | |||
| + | |||
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| ^ 1 | " | ^ 1 | " | ||
| ^ 2 | "The maximum equivalent isotropically radiated power (e.i.r.p.) of stations in the amateur service using frequencies in the band 472-479 kHz shall not exceed 1 W. Administrations may increase this limit of e.i.r.p. to 5 W in portions of their territory which are at a distance of over 800 km from the borders of Algeria, Saudi Arabia, Azerbaijan, Bahrain, Belarus, China, Comoros, Djibouti, Egypt, United Arab Emirates, the Russian Federation, Iran (Islamic Republic of), Iraq, Jordan, Kazakhstan, Kuwait, Lebanon, Libya, Morocco, Mauritania, Oman, Uzbekistan, Qatar, Syrian Arab Republic, Kyrgyzstan, Somalia, Sudan, Tunisia, Ukraine and Yemen. In this frequency band, stations in the amateur service shall not cause harmful interference to, or claim protection from, stations of the aeronautical radionavigation service. (WRC-12)" | ^ 2 | "The maximum equivalent isotropically radiated power (e.i.r.p.) of stations in the amateur service using frequencies in the band 472-479 kHz shall not exceed 1 W. Administrations may increase this limit of e.i.r.p. to 5 W in portions of their territory which are at a distance of over 800 km from the borders of Algeria, Saudi Arabia, Azerbaijan, Bahrain, Belarus, China, Comoros, Djibouti, Egypt, United Arab Emirates, the Russian Federation, Iran (Islamic Republic of), Iraq, Jordan, Kazakhstan, Kuwait, Lebanon, Libya, Morocco, Mauritania, Oman, Uzbekistan, Qatar, Syrian Arab Republic, Kyrgyzstan, Somalia, Sudan, Tunisia, Ukraine and Yemen. In this frequency band, stations in the amateur service shall not cause harmful interference to, or claim protection from, stations of the aeronautical radionavigation service. (WRC-12)" | ||
| - | ^ 3 | " | + | ^ 3 | " |
| ^ 4 | "The use of the band 7.200 -- 7.300 MHz in Region 2 (North America) by the amateur service shall not impose constraints on the broadcasting service intended for use within Region 1 and Region 3 (Europe and Asia)." | ^ 4 | "The use of the band 7.200 -- 7.300 MHz in Region 2 (North America) by the amateur service shall not impose constraints on the broadcasting service intended for use within Region 1 and Region 3 (Europe and Asia)." | ||
| ^ 5 | "The use of the band 10.100 -- 10.150 MHz by the amateur service in Canada is not in accordance with the international frequency allocations. Canadian amateur operations shall not cause interference to fixed service operations of other administrations and if such interference should occur, the amateur service may be required to cease operations. The amateur service in Canada may not claim protection from interference by the fixed service operations of other administrations." | ^ 5 | "The use of the band 10.100 -- 10.150 MHz by the amateur service in Canada is not in accordance with the international frequency allocations. Canadian amateur operations shall not cause interference to fixed service operations of other administrations and if such interference should occur, the amateur service may be required to cease operations. The amateur service in Canada may not claim protection from interference by the fixed service operations of other administrations." | ||
| - | ^ 6 | "In the band 219 -- 220 MHz, the amateur service is permitted on a secondary basis. In the band 220 -‑ 222 MHz, the amateur service may be permitted in exceptional circumstances on a secondary basis to assist in disaster relief efforts." | + | ^ 6 | "In the band 219 -- 220 MHz, the amateur service is permitted on a secondary basis. In the band 220 -- 222 MHz, the amateur service may be permitted in exceptional circumstances on a secondary basis to assist in disaster relief efforts." |
| ^ 7 | "The 81.0 -- 81.5 GHz band is also allocated to the amateur and amateur-satellite services on a secondary basis." | ^ 7 | "The 81.0 -- 81.5 GHz band is also allocated to the amateur and amateur-satellite services on a secondary basis." | ||
hambasics/sections/intro.1756508907.txt.gz · Last modified: by va7fi