RadioQTH  
Friday, July 3, 2009 
 

RadioQTH Lookup

Licenses

You can use the lookup below to search RadioQTH's database of call signs. The data is a day or two behind the FCC's data so some calls might have been assigned and yet still show as inactive or not show up here at all. For the latest up-to-date information you can search the FCC's live data by clicking here. For the RadioQTH lookup below, once the results come back you can click on the call sign and get a detailed listing of the call holder's license data. You can click on the License ID field and get a history of that specific call holder's license.

Enter call sign: 

Applications

You can use the lookup below to search RadioQTH's database of applications that have been filed for or by a particular call sign. As with the license database, the application data is a day or two behind the FCC's live data. The search will include applications that have been filed in the last month. Clicking on the License ID will give you a history of the applicant's call signs. Clicking on the Vanity Application number will bring up the actual application that was filed with the FCC.

Applications Filed For Call Sign:
Applications Filed By Call Sign:

If you would like to do a more advanced license call sign lookup, where you can list amateur radio operators by their zip code, then please use the Zip Code Lookup feature by clicking here.

General Exam
Question: G8A12

Question: What happens to the RF carrier signal when a modulating audio signal is applied to an FM transmitter?

A. The carrier frequency changes proportionally to the instantaneous amplitude of the modulating signal

B. The carrier frequency changes proportionally to the amplitude and frequency of the modulating signal

C. The carrier amplitude changes proportionally to the instantaneous frequency of the modulating signal

D. The carrier phase changes proportionally to the instantaneous amplitude of the modulating signal

Correct Answer: A


For more questions that might appear on an Amateur Radio License Test, click on the "practice exams" link on the left panel.