601: If you are in contact with another ham whose location is "antipodal" to yours, what is the other ham's location?

602: With Ohm's law, if "E" is the abbreviation for electromotive force and "R" is the abbreviation for resistance, What is the abbreviation "I" used and what does it stand for?    

603: Which of these was -NOT- a feature of the Johnson Viking II?

604: Your call sign is KZ8ZY and you are operating while visiting Ontario. What should your ID sound like?  

605: An amateur with a VE5 prefix is most likely operating from

606: Transmitting a fast-scan television (ATV) signal at 425.0 MHz would be...

607: Why does adding radials to a 1/4 vertical antenna seem to increase the SWR?

608: How would one recognize an amateur station in the United Kingdom with a Novice license?

609: What was the actual design of Louis Varney's G5RV wire dipole multiband antenna?

610: Which of the following connectors is not used in the Amateur radio hobby?

611: The FCC has responsibility for assignment of space in the frequency spectrum among all U.S. users, both government and non-government.

612: Pegasus is the name of which of the following radio products?

613: When applying for a vanity callsign, which of these 2x1 calls cannot be granted to an Extra-class ham living in California?

614: What well-known country singer holds the call KD4WUJ?

615: How many choices may be listed on a vanity callsign application preference list?

616: County Hunters know Texas has the most counties of any state...do you know how many???

617: More County Hunters goodies: After Texas, what state has the most counties?  

618: What is the current application fee for a vanity callsign?  

619: Which international organization requires a minimum of 40 years of two-way wireless communication by amateur, military, or commercial means for membership?  

620: Which of the following entities accepts applications for vanity callsigns?    

621: What prefix can represent an "atoll" type of island?

622: Where does the term "DX" originate?  

623: The African call prefix 7P is totally landlocked by African call prefix ZS.

624: In addition to Hiram Percy Maxim who is also credited with establishing the American Radio Relay League (ARRL)?

625: Why is it common practice to use LSB on 80 meters, but use USB on 20 meters?