eHam.net - Amateur Radio (Ham Radio) Community

Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net



[Articles Home]  [Add Article]  

No-Nonsense Extra Class Study Guide:

Dan Romanchik (KB6NU) on November 20, 2012
View comments about this article!

I'm happy to announce that the No-Nonsense Extra Class License Study Guide is now available.

The No-Nonsense series of amateur radio license study guides has become famous for helping people pass the tests. Written in a simple, easy-to-understand style, this study guide will help you upgrade to Amateur Extra Class. Here's an excerpt:

Digital circuits are used for a variety of functions in modern amateur radio equipment. Unlike analog circuits, the output voltage of an ideal digital circuit can only be one of two values. One of these voltages—normally a positive voltage—represents a digital 1. The other value—normally near 0 V—represents a digital 0.

This type of logic is generally called positive logic. Positive Logic is the name for logic which represents a logic '1' as a high voltage. (E7A11) The logic may be reversed, though. That is to say that a high voltage may represent a logic 0. Negative logic is the name for logic which represents a logic '0' as a high voltage. (E7A12)

The microcomputers that control today’s transceivers, for example, are very complex digital circuits. These complex digital circuits are made by combining many smaller building blocks called logic gates. These gates perform basic digital logic functions.

One of the most basic digital circuits in the NAND gate. The logical operation that a NAND gate performs is that it produces a logic '0' at its output only when all inputs are logic '1.' (E7A07)

For more information on the Extra Class study guide, as well as my other study guides, go to http://www.kb6nu.com/tech-manual.

Member Comments:
This article has expired. No more comments may be added.
 
No-Nonsense Extra Class Study Guide:  
by W6TGE on November 20, 2012 Mail this to a friend!
Dan, I have sent you email to 2 addresses I had for you. Did you get them?
 
Email Subscription
You are not subscribed to discussions on this article.

Subscribe!
My Subscriptions
Subscriptions Help

Other News Articles
Ham Radio Specialist Picked Up the Signal Early In Life:
Kalamazoo Father and Daughter Launching Camera Into Space:
Radiosport and Engineering at the Olympics of Ham Radio:
Chasqui-1 Amateur Radio CubeSat Deployed from ISS:
We are Happy to Tell You, that the QRZCQ Premium is Now Available!