On 4/6/2014 9:41 PM, Steve Bonine wrote:
> I surprised myself by my reaction to your comment, especially since
> we've been beating this horse for years.
The "code" issue, yes, we've done that to death. As an "Old law" Extra
who passed a 20 wpm code test, I'm entitled to say that the view from
the top of that mountain was not worth the climb.
However, this isn't about code, even as an April Fool's joke.
> Today people memorize the questions and answers from the pool, while in
> the past they learned the concepts behind them. I've made this same
> argument myself; it seems obvious that learning concepts is better than
> memorizing answers.
>
> But is it, really? How much actual electronics did people learn before
> the question pool came along? In reality, they spent their time
> memorizing formulas that they could use during the test. They retained
> most of that information about as long as current candidates retain the
> answers to the test pool questions.
You're right. To be sure, I 'understood' the formulas needed to pass the
tests, but I didn't know what they meant until years later: that is the
difference between theory and practice.
It isn't until the "book" learning is tested by use, and we get to see
the results of those formulas being put to practical tests, that we come
to understand what's actually happening.
For example, while studying for one of my exams, I memorized the fact
that antennas have both an electrostatic and an electromotive field. It
wasn't until years later, when I was called on to teach that fact to
young students, that I had to /think/ about what that /actually/ meant.
I wound up teaching the students what a capacitor is, and we made one in
the class out of saran wrap and tinfoil, and I taught them how to
calculate the amount of capacitance (the meter, mercifully, agreed with
me). I then asked them what would happen if we separated the plates by
addition space, and I showed them an air variable and explained that it
was still a capacitor, and then I asked what happens when we separate
the plates by a few miles.
The puzzled looks on all those young faces gave way to gasps of
astonished understanding and cries of glee when I said "Well, if the
plates are that far apart, we call them antennas". It was an incredible,
and incredibly satisfying moment: I realized that they wouldn't have to
wait for years to understand why an antenna has an electrostatic field -
or why a magnetic loop is less susceptible to noise (which is mostly
electrostatic) than a regular loop.
I knew the formulas. I didn't know the /truth/ until I /had/ to think
about it in practical, explainable ways.
> Today hams are appliance operators, and the part of the process that is
> important relates to regulations and safety, and that's not really
> concepts, so whether you learn it by questions for the pool or
> memorizing text makes little difference.
>
> Of what possible use to today's ham is calculating the resonance
> frequency of an LC circuit? The only reason to force someone to learn
> that -- whether they learn it by memorizing a formula or by memorizing
> the answer to a question from the pool -- is to build a barrier to
> entry. This provides prestige to the people who surmounted the barrier,
> which is not an entirely bad thing. But the belief that candidates are
> actually learning anything about electronics is, and always has been,
> mostly a myth.
It may make more sense to look at ham tests of the 1960's the way I do:
entrance exams for military radio operators, which contain a lot of
questions about practical operation of HF radios in the field.
Questions such as how to calculate antenna length, how to neutralize a
transmitter, how to check a receiver setting against a crystal
calibrator or a frequency reference, were all things of everyday
interest to enlisted men operating Morse code in mobile radio teams.
You see (and this /is/ a subject /I/ regularly beat to death), hams were
a reserve force of radio operators who could be drafted and put to work
quickly when wars broke out. In /that/ paradigm, a few basic formulas
beaten into young minds by rote memorization were /exactly/ what the
War^h^h^h Defense department wanted.
73,
Bill, W1AC
(Filter QRM to write to me directly)