I don't know about you, but my wife and I got really tired of paying for cable TV. We used to love having cable, but over the past 20 years we have noticed that not only was the price going up, but the selection of channels were not that great either. I remember back when cable TV first came out you used to get around 40 or so channels with Showtime, HBO, and The Movie Channel for right around twenty some odd bucks. Now, you have the capability of having a hundred or so channels and a nice hefty bill at the end of each month. The bad thing about it is, you have to ask yourself, how many of these channels do I actually watch? Well, with the basic package that we had we only watched about seven or eight channels on a regular basis. The rest were filled with stuff we did not watch like sports, religion, reality shows, and oh yeah, tons of infomercials.
We finally cut the cord to try and save some money when I became disabled and no longer could afford to pay the hefty nut that the cable company wanted each month. Back when the government did away with analog TV and switched everything over to digital, we took advantage of the coupon program and got our first two digital converter boxes. I bought two RCA model DTA800B1 boxes and went online to find some sort of TV antenna to build. I decided to build what everyone was calling a bowtie antenna, but it is actually a dipole array. I followed the instructions with the exception that I soldered all my joints and I used # 12 solid copper wire instead of the coat hangers that was used in the video. The resulting antenna was rather flimsy but seemed to work fairly well indoors. I was able to pull in about 18 free digital TV channels no problem. I added a splitter so that I could run the box that was in my bedroom off of the same antenna that I used in the living room and as expected, there was some loss in the signal. I solved that problem by installing a small Radio shack cable TV amplifier right at the antenna, and that helped boost the signal quite a bit. If you need the manual fot the RCA DTA800B1, click here.
Being the experimenter that I am, I decided to try a couple of other antenna designs. My second antenna was a log periodical. I was going to include the link to where I found the instuctions how to build this antenna , but unfortunetelly the link is no longer available. You can find a similar crude design for this antenna here. This was a really simple antenna to build and recieves really well, but the beam width is very narrow. You almost have to be pointed right at the TV station to get a really strong signal. I guess this antenna would be optimal if you had it on a rotator. Unfortuately, my rotator is manual. If I want to turn the antenna, I have to go outside and turn it by hand. I decided to install an A/B switch at the base of my indoor dipole array so that I could switch between antennas when I am having trouble pulling in a signal using the indoor antenna.
My XYL has an old analog Sony Trinitron TV in her library that she wanted to get up and running so I had to scrounge around and find another digital converter box. I was given an Apex DT-250 and an RCA 1921GM amplified antenna by a friend for free because he could not get it to work. The box came with no remote which was a real issue because the only button on this unit is for power. There is no way to change the channels without the remote. I tried to use a universal remote but finding codes for Apex products is a real challange. I wound up buying an Apex remote off of Ebay for twenty five bucks, and the unit fired right up. While waiting for the remote to show up, I did some research on this converter box and found nothing but bad reviews. It seems that this box has a overheating problem which causes capacitors to blow. It is also not very user friendly and finding a manual is very hard to do. If you need the users manual, click here
When we disconnected from our local cable TV provider, I lost the ability to have television in the hamshack. My old analog TV sat useless thanks to the new digital requirement. There was no way that I was going to throw away a perfectly good TV just to go spend a ton of money on a flat screen in which I cannot afford anyway. I have searched and searched yardsales, goodwill, and thrift stores for about two years in hopes of finding a cheap used converter box to no avail. I know, they are a dime a dozen on Ebay but you have to understand, I am on a fixed income so to spend thirty or fourty dollars on a used box will prevent me from paying a bill. Money is tight these days so one has to be resourceful whenever possible.
By a stroke of good luck, my father had a brand new Zenith DTT901 still in the box stashed away in one of his closets. He was generous enough to let me have it at no cost, and I could not thank him enough. By far, this is the nicest converter box that I now own. There are buttons on the front to operate the channels manually and an on off button. It also sports a really cool looking LED in the front of the unit that changes from red to blue when the unit is turned on. I love the blue LED as it stands out with all my other computers and ham equipment that have blue displays or buttons. The clock in the picture is a heathkit GC-1107 kit that I built a few years ago. If you need the owners manual, click here.
Disclaimer: All books are NOT new, they are used and considered to be in good condition, with some minor wear and tear due to age unless otherwise described. All items are described to the best of my ability, all sales final, no returns.
By Donald E. Lancaster
This book will help the electronics experimenter understand and use the low cost digital integrated circuits now available for practical electronics projects. The material presented attempts to shatter the myth that digital IC's are too expensive, too complex, or too awesome to use intelligently in simple circuits.
In addition, this book shows the technician the why of digital IC's-how they work, how to use them, and how to design with them. It tells how digital instruments work and how to design and build your own fully integrated IC systems.
Also, this book should be valuable to the engineer who is tired of wading through a stack of application notes and pre-IC computer books to try to find realistic and reasonable designs for such things as divide-by-n scalers, low cost decimal counter/readouts, IC monostables, synchronizers, or other circuits. The three chapters on counting flip-flops, dividing by-n counting and decimal counting provide circuits virtually ready for immediate use.
The reason this book deals entirely with Resistor Transistor Logic (RTL) are relatively low prices of this digital IC line, the ease of with which it can be understood, and the ease of which it can be interfaced with conventional transistor circuitry.
By Don C. Miller W9NPT & Ralph Taggart WB8DQT
First Edition Printed 72 Revised Edition Printed Oct. 73 Copyright 1973 by 73 Inc.
Table Of Contents:
Chapter 1: Basic Principles of Slow Scan TV
Chapter 2: Popular Slow Scan Television Circuits
Chapter 3: Slow Scan Television Monitors
Chapter 4: Flying Spot Scanners
Chapter 5: Live Vidicon Cameras
Chapter 6: Color Slow Scan Television
Chapter 7: Applications of Audio Filters for SSTV
Chapter 8: Independent Sideband
Chapter 9: Slow Scan Television Test Equipment
Chapter 10: Miscellaneous Topics
Chapter 11: Commercial Slow scan Television Equipment
Biasing diagrams for devices used in text
Condition: VERY GOOD. Light rubbing wear to front & back cover, spine has small piece missing, former owners signature on back cover. Pages are slightly yellowed due to age, no missing pages.
Technical Series CMS-271 1972 RCA
This manual, like its preceding edition, has been prepared to provide an understanding of the basic principles involved in the design, fabrication, and application of COS/MOS digital integrated circuits. The basic fundamentals, features, and characteristics, building block elements, and logic system design rules for complementary-symmetry/metal oxide semiconductor (COS/MOS) integrated circuits are explained.
Design examples and performance data are then given for the use of COS/MOS integrated circuits in a variety of circuit applications, including NOR and NAND gates, arithmetic units, multivibrators, sinusoidal oscillators, counters and registers, digital display systems, and frequency synthesizers. The manual also features a circuits section that provides design ideas for the use of COS/MOS integrated circuits in twenty five practical circuit applications.
This new edition has been updated and substantially expanded to include descriptive data on recently announced RCA COS/MOS integrated circuits and to provide broader more extensive application information. This manual is intended primarily as a guide to circuit and system designers; it is also useful to students, educators, technicians, and others interested in the use of solid state devices and circuits.
Overall good condition, spine not broken. Small creases on top and bottom of front cover, no pages missing.Former owners signature on top right front cover. Light chafing on pages.
by Rufus P. Turner
The family of transistors contains many members besides the conventional bipolar transistor that has been widely accepted in electronics technology. Among the lesser known types are the unijunction transistor and the field-effect transistor (FET). This book provides an opportunity for technicians to become acquainted with the latter.
The distinctive feature of the field effect transistor (FET) that sets it apart from other transistors is its high input impedance. This it resembles a vacuum tube in operation, although it is a transistor in construction. It has been said that the transition from tubes to transistors would have been much more orderly and logical if the FET had preceded the bipolar transistor in development, since there is so little change in circuitry and operation.
FET Circuits is devoted almost entirely to a discussion of actual workable circuits using field-effect transistors. While the essential facts of construction and theoretical operation are included in the introductory chapter, this book stresses applications. Amplifiers and oscillators each have a chapter of their own. Practical circuits for broadcast band and all-wave receivers make up another chapter.
Transmitters with their accessory equipment are described in detail. Various test instruments that can use FET's to advantage in their circuitry are also covered. Included in the appendices are lists of manufacturers and drawings of basing diagrams for the FET's discussed in the book, for those who wish to experiment with FET's on their own. Technicians, hobbyists, and experimenters will find FET Circuits a valuable aid in their search for up to date information.
Light creases on front and back covers.
The purpose of this handbook is to provide a fully indexed and cross-referenced collection of linear integrated circuit applications using both monolithic and hybrid circuits from National Semiconductor.
Individual application notes are normally written to explain the operation and use of one particular device or to detail various methods of accomplishing a given function. The organization of this handbook takes advantage of this innate coherence by keeping each application note intact, arranging them in numerical order, and providing a detailed Subject Index composed of approximately 1200 references to the main body of the text. This Subject Index provides the key to efficient access to the applications experience accumulated over the last five years by National Semiconductor.
Usual wear and tear to front & back covers, spine. No missing pages, and the pages are clean. Small stain on front cover from removed sticker. Former owners signature in top right of front cover.
This DATABOOK contains application notes on linear integrated circuits and DMOS (discrete MOS field-effect) devices presently available from RCA Solid State Division as standard products. Data sheets on both linear IC's and DMOS devices are contained in a seperate DATABOOK, SSD-201C.
For ease of reference, the application notes in this book are arranged in numerical sequence. The index on pages 6-8 groups the notes in the same categories used in the SSD-201C selection charts: (a) operational amplifiers; (b) arrays; (c) differential and broadband (video) amplifiers; (d) power-control, computer interface, and analog-multiplier circuits; (e) consumer circuits; (f) DMOS devices.