*Question G1C09:
[97.313(i)] What is the maximum power limit on the 60-meter band?*  

*Correct Answer is  C: ERP of 100 watts PEP with respect to a dipole*  

### AI Response: (may contain errors)  

On the 60-meter band, the power limit is specified in terms of Effective Radiated Power (ERP) relative to a dipole antenna. Here's why the correct answer is "ERP of 100 watts PEP with respect to a dipole":

1. **Correct Answer Explanation:**
   - The FCC rules specify that on the 60-meter band, the maximum power limit is an ERP of 100 watts PEP (Peak Envelope Power) relative to a dipole antenna. This means that the power radiated by your antenna should not exceed what a dipole would radiate if it were fed with 100 watts PEP.

2. **Why Other Choices Are Incorrect:**
   - **A: 1500 watts PEP**  
     This is the general maximum power limit for most amateur bands, but it does not apply to the 60-meter band, which has a specific restriction.
   - **B: 10 watts RMS**  
     RMS (Root Mean Square) power is not the standard measurement for amateur radio power limits, which are typically specified in PEP.
   - **D: ERP of 100 watts PEP with respect to an isotropic antenna**  
     An isotropic antenna is a theoretical antenna that radiates equally in all directions. The 60-meter band limit is specified relative to a dipole, not an isotropic antenna.

3. **Useful Formulas and Rules of Thumb:**
   - **ERP Calculation:**  
     $$ERP = P_T \times G_A$$  
     where:
     - $P_T$ = transmitter power in watts
     - $G_A$ = antenna gain relative to a dipole (linear scale)

   - **Gain Conversion:**  
     If you have antenna gain in dBd (decibels over dipole), you can convert it to a linear scale for ERP calculations. For example, a gain of 3 dBd means the antenna gain is twice that of a dipole, or $G_A = 2$.

Understanding these rules ensures compliance with FCC regulations and helps you operate legally on the 60-meter band.