276: In what year was the first rotating oscillator built?  

277: Besides the invention of the telegraph, what else was Samuel Morse known for?  

278: In what year was the Telegraph patented?  

279: In what year did QST magazine first appear?  

280: In what year did the ARRL form?  

281: In what year was the first transatlantic two-way communication take place?

282: In what year did the first International Radio Regulations go into effect?  

283: Who built the first "beam" antenna?  

284: In what year did the first two-way EME contact on 1296 MHz take place?

285: Generally, which type of polarization is best for space communications?  

286: What is the typical bandwidth of a CW signal?

287: On November 15, 2001, the amount of counties required by CQ Magazine in order to receive the USA-CA award for working all counties increased to 3077. Which was the new county that was formed on that date?  

288: In which year was a "Radio Compass" used to locate ships?  

289: In which year, were music and entertainment broadcasts, first commercialized?  

290: In what year did Samuel Morse secure the funds from U.S. Congress to construct the first telegraph line in the U.S.?  

291: In which 90's movie, did Ham Radio "save the day"?  

292: In the movie Contact, what was Ellie's callsign?

293: The first telegraph line in the U.S. ran between which two cities?  

294: In what year did an Amateur Radio operator confirm contacts will all the continents?

295: In which year did the first "Field Day" occur?  

296: In which year was Samuel Finley Breese Morse born?  

297: What is the maximum bandwidth of a commercial broadcast FM signal?  

298: True or False: It has been illegal for U.S. citizens, including amateurs, to use a radio receiver?      

299: Prior to using the RST system, how was Tone described?  

300: What was the matching transmitter to the Knight Kit, R-100 receiver?