Forum Replies Created
-
Posts
-
This was just modified last weeK:
Let’s say that you are trying to build a radio tower for radio station 680 AM. It is transmitting a sine wave with a frequency of 680,000 hertz. In one cycle of the sine wave, the transmitter is going to move electrons in the antenna in one direction, switch and pull them back, switch and push them out and switch and move them back again. In other words, the electrons will change direction four times during one cycle of the sine wave. If the transmitter is running at 680,000 hertz, that means that every cycle completes in (1/680,000) 0.00000147 seconds. One quarter of that is 0.0000003675 seconds. At the speed of light, electrons can travel 0.0684 miles (0.11 km) in 0.0000003675 seconds. That means the optimal antenna size for the transmitter at 680,000 hertz is about 361 feet (110 meters). So AM radio stations need very tall towers. For a cell phone working at 900,000,000 (900 MHz), on the other hand, the optimum antenna size is about 8.3 cm or 3 inches. This is why cell phones can have such short antennas.
Happy 33rd birthday for Seattle’s KUBE 93-FM
http://www.kube93.com/onair/karen-wild-3209/10-stpatricks-day-trivia-facts-11071306/
KIRO has dug itself a huge hole.
…How many program directors have they had in the past 3 years anyway?
Word is AM-1090 Seattle will be changing format to sports this January 1st…
Apparently CBS Radio wants to market their new sports network…
Strangely enough I was recently out-of-state at some casino and had overheard
Jed Clampett exclaim at a poker table after he had lost almost all of his winnings:
“It’ll all come back now, ya hear?” – –
