I've just started studying for my HAM license a couple of weeks ago, so please excuse me if this is a remedial question...
I have the Canadian Amateur Radio Basic Qualification Study Guide (which I'm finding is terribly hard to understand). Their explanations of just about everything appear to be missing pertinent information that allow the reader to connect the dots and consequently I'm struggling to understand what they're explaining... anyway, the book discusses a formula which supposedly allows you to determine the bond between frequencies and their band - i.e. the calculation in the book tells me that 300 / Wavelength = Frequency... where one is to assume that 300 is a rough simile of the speed of light in millions of meters per second. The book suggests the resultant frequency is approximately (within some unexplained tolerance) the middle of the bandwidth for that band plan.
I'm noticing that using this formula for many bands the resulting frequency doesn't fall within the suggested frequency range for that plan and where they do, many don't fall within any discernible tolerance of the middle.
- 20m band = 300 / 20 = 15.000 MHz, whereas the book suggests the frequency band falls between 14.000 - 14.350 MHz. (Clearly 15.000 MHz falls outside that range)
- 2m band = 300 / 2 = 150.000 MHz, whereas the book suggests the frequency band falls between 144.000 - 148.000 MHz.
- 33cm band = 300 / 0.33m = 909.091 MHz, a long way from the middle of the suggested frequency band of 902.000 - 928.000 MHz
Even if I substitute the more accurate (according to Google) measurement of c being 299,792,458 m/s, I arrive at 14.990 MHz for 20m, still not within the frequency band.
Clearly I'm missing something, can someone explain what I'm not understanding?