Deep Dive: G1C09
The correct answer is C: ERP of 100 watts PEP with respect to a dipole. The maximum power limit on the 60-meter band is ERP (Effective Radiated Power) of 100 watts PEP with respect to a dipole. This is different from transmitter power - it's the radiated power, accounting for antenna gain. For amateur radio operators, this means you must calculate your ERP based on transmitter power and antenna gain. Understanding this helps ensure legal operation on 60 meters, which has unique power restrictions.
Why Other Answers Are Wrong
Option A (1500 watts PEP): Incorrect. 1500 watts is the transmitter power limit on most HF bands, but 60 meters has a different limit based on ERP, not transmitter power. Option B (10 watts RMS): Incorrect. 10 watts RMS is too low and not the correct specification - 60 meters uses ERP with respect to a dipole, not RMS power. Option D: Incorrect. ERP with respect to an isotropic antenna isn't the specification - it's with respect to a dipole. The reference is a dipole, not isotropic.
Exam Tip
60-meter power limit = ERP of 100 watts PEP with respect to dipole. Think '6'0 meters = '1'00 watts 'E'RP 'D'ipole. Effective radiated power limit, not transmitter power. Must account for antenna gain. Reference is dipole, not isotropic.
Memory Aid
60-meter power limit = ERP of 100 watts PEP with respect to dipole. Think '6'0 meters = '1'00 watts 'E'RP 'D'ipole. Effective radiated power limit accounting for antenna gain. Reference is dipole, not transmitter power or isotropic.
Real-World Example
You operate on 60 meters with 50 watts transmitter power and a dipole antenna (0 dB gain). Your ERP is 50 watts, which is within the 100-watt ERP limit. If you used a 3-element Yagi with 8 dB gain, your ERP would be much higher, and you'd need to reduce transmitter power to stay within the 100-watt ERP limit.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G1C
Reference: 2023-2027 Question Pool · G1 - Commission's Rules
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G1C topic.