Radioman390 started this with his FM station at 87.9 MHz question
So fer fun decided to throw in a few more.

Radio Puzzle No.3 What happened to TV channel 1.
See URL: http://members.aol.com/jeff560/tvch1.html

Radio Puzzle No. 4 What happened to the B Battery
See URL: http://ac6v.com/73.htm#batt

Radio Puzzle No. 5 DSB Suppressed Carrier Question
See URL: http://cnyack.homestead.com/files/modulation/fmsteo.htm

Radio Puzzle No.6 Where Did the term Radio come from
ORIGIN OF THE WORD RADIO
From "UNITED STATES EARLY RADIO HISTORY" BY THOMAS H. WHITE
Radio, currently a synonym for "electromagnetic radiation", actually first
came into use before Heinrich Hertz's proof of the existence of radio waves.
Originally "radio" was a general prefix meaning "radiant" or "radiation" --
hence the term "radio-activity" for the alpha, beta, and gamma rays emitted
by decaying atoms. In Europe, some of the persons investigating Hertz's
discovery began using the "radio-" prefix -- for example, in 1890 Edouard
Branly in France called his receiver a "radio-conductor", the October 24,
1902 issue of The Electrician (London) included an article titled "The
Radio-telegraphic Expedition of the H.I.M.S. 'Carlo Alberto'", and a report
in the November 19, 1904 Electrical Review about Belgium marine applications
noted that "radio-telegraphy has entered into the domain of current
practice".

Radio Puzzler No. 7 Why short in shortwave
See URL: http://www.wordiq.com/definition/Shortwave

DX is defined in Funk and Wagnall's Encyclopedia as "Distance"
Hams using mores code coined the abbreviation way back when -- example in
1937 The ARRL introduces the DXCC Program
but it was used clear back in the 20's.

On the old-fashioned switchboards with plugs and cords, circuits coming in
from distant exchanges had a label marked "DX" above the jack socket.
Hence D = Distant X = Exchange

I shall puzzle here no more forever -- too much politics and very little
about shortwave or radio
Yeah I know about the door on the way out.
--
The Keyboard is now silent