This is the page we will use for the general cxlass information distribution

IN ADDITION TO FANNIN HAMS

Posted for this week were the following questions

DON'T worry if you can't figure them out we will discuss on Tuesday...

However try and look up the information..  Education is all about knowing where to find the answers!!

What is the ratio of peak envelope power to average power for an unmodulated carrier?
 A. .707
 B. 1.00
 C. 1.414
 D. 2.00

  What is the approximate length for a 1/2-wave dipole antenna cut for 14.250 MHz?
 A. 8 feet
 B. 16 feet
 C. 24 feet
 D. 32 feet

  What portion of the AC cycle is converted to DC by a half-wave rectifier?
 A. 90 degrees
 B. 180 degrees
 C. 270 degrees
 D. 360 degrees

  What would be the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?
 A. 173 volts
 B. 245 volts
 C. 346 volts
 D. 692 volts

FOOD FOR THOUGHT STUFF...

What is the speed of light (radio wave) in free space?

ANSWER IS  (So you dont haave to look it up..

In both meters per second?   In Kilometers per second?          299,792,458m/s  =  299,792.458km/sec  =  299.792458megameters/sec.

Actually we use a standard rounded off number in the HAM world of 300,000,000 m/s or 300 km/sec.   So 7,000,000Hz(7,000 khz.  7 megahertz) in wavelenght is 

300000000/7000000= 42.87 Meters  But using the real value 299792.458/7000000 = 42.82   Close enough for 40 meters huh?  The actual 40 meter freq. is 7.5 MHz.

Assuming we what we all call 120 volts AC is actually the RMS voltage, What is the peak to peak voltage of standard US voltage?

Vp = VRMS × √2, assuming the source is a pure sine wave. Thus the peak value of the mains voltage in the USA is about 120 × √2, or about 170 volts.     Good to know that √2=1.41421356237

1/2 of 1.41421356237 =.707106  

Frequency=1/T where T is the time of one cycle.