626: Which of the below could a Novice class control operator legally do in 1963?  

627: Odd character out time...choose the one that does NOT belong...

628: Which of these possible call signs could one assume is a vanity call, without having to check the call sign database?  

629: Even though they are out of the Amateur Radio business (for now), what product is Heath still making - or reduced to, depending on your point of view?

630: What was the first three element vacuum tube called?

631: What is the acronym (abbreviation) for the official Ham Radio Society in Great Britain?

632: The "Esaki Diode," named after its inventor, is more commonly known as a _____?

633: Wireless Telegraphy was first developed and demonstrated by whom?

634: The equivalent value of inductance for three 10 microHenry coils connected in parallel is -   

635: The transistor was invented at Bell Laboratories. Which man was not a member of the design team.

636: Which famous science fiction author proposed world wide satellite communication systems?

637: An 'eyeball QSO' is one where two Amateurs meet face-to-face.

638: What does the term 'twisted pair' mean in Amateur Radio slang?  

639: Thermal noise in a receiver is sometimes referred to as:    

640: The Phased Lock Loop (PLL) was first developed/invented for what purpose?

641: Which of these could one logically assume is a vanity call, without having to look it up in a database?

642: Which of these is directly adjacent to an amateur band (in the USA and Canada)?

643: Which band may NOT be used by Earth stations for satellite communications?

644: Which amateur band is "open" (useable for ionospheric propagation) to *somewhere* more of the time than any other band?  

645: What is a typical plate voltage in a circuit using a 12AD6 tube as a converter?

646: Transcontinental telephone service was first inaugurated in 1915. What was the cost for making a three minute call?  

647: What is the grace period during which the FCC will renew an expired license?    

648: The telephone was invented by Alexander Graham Bell in 1876. The word "telephone" is derived from Latin.

649: Under what circumstance does the FCC still require amateurs to maintain a log of their operations?

650: Which of the following is NOT a characteristic of transformer magnetic core material.