KB6NU's Ham Radio Blog

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2020 No Nonsense Extra Class study guide now available!

Posted: 11 Apr 2020 06:08 AM PDT
http://feedproxy.google.com/~r/kb6nu...m_medium=email


On July 1, 2020, the question pool for the Extra Class exam will change.
With that in mind, I am happy to announce that the PDF and Kindle versions
of the 2020 No Nonsense Extra Class License Study Guide are now available.
(A Nook version, a print version, and smart flash cards will also be
available soon.)

Written in a simple, easy-to-understand style, this study guide will help
you upgrade to Amateur Extra Class in no time. I guarantee it! If this book
doesn’t help you pass the test, I’ll give you your money back.

Here’s a sample of the text:

Calculating the gain and output voltage of an op amp circuit is relatively
straightforward. The gain is simply RF/Rin. In the op amp circuit shown in
Figure E7-3, Rin = R1. The output voltage of a circuit is then the input
voltage times the gain.



QUESTION: What magnitude of voltage gain can be expected from the circuit
in Figure E73 when R1 is 10 ohms and RF is 470 ohms? (E7G07)

ANSWER:Â*47

If R1 is 10 ohms and RF is 470 ohms, the gain is 470/10, or 47.

While the gain of an ideal operational amplifier does not vary with
frequency, op amps in the real world do have a finite bandwidth. Some
modern op amps can be used at high frequencies, but many of the older ones
can’t be used at frequencies above a couple of MHz. To find out if you can
use an op amp at the frequency of your signals, check out the
gain-bandwidth specification. The gain-bandwidth specification is the
frequency at which the open-loop gain of the amplifier equals one.

QUESTION: How does the gain of an ideal operational amplifier vary with
frequency? (E7G08)

ANSWER:Â*It does not vary with frequency

QUESTION: What is the gain-bandwidth of an operational amplifier? (E7G06)

ANSWER:Â*The frequency at which the open-loop gain of the amplifier equals
one

My No Nonsense study guides have become famous for helping people pass the
tests. The Technician Class and General Class study guides have helped
thousands either get their first licenses or upgrade to General Class. This
book can help get you to Extra Class, too.

For more information on all my study guides and smart flash cards, go to
http://www.kb6nu.com/study-guides.

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