[R-390] analysis chart

[Tisha Hayes]

It sounds like the author was developing a good understanding of circuit
analysis. This is very similar to the process you go through when designing
a new receiver or transmitter; Since each circuit (RF, IF, mixer, AF,
detector, oscillator, etc...) has it's own characteristics you need to have
a keen grasp of how each circuit behaves, then you need to expand that
understanding out to the device at large.

I spent many years designing VHF/ UHF receivers and the process described is
a very important, and often overlooked phase of design. Usually at that
point in a product development cycle, the marketing group wants to produce
full color slicks and turn prototype equipment over to some alpha-site
customer. As an engineer I have always felt pressured to skip or shorten
this process. Every time you could fight off marketing, bean-counters
looking at the engineering dollars spent or some arbitrary time-limit you
could always pull a few more dB out of a design.

I admire this long forgotten engineer that was going through that process on
the radio you have. While he may not have made a tremendous improvement on
how the radio performed, I am certain that he had a great learning
experience.
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