Author: George D. Oprescu
Publisher: Tineretului - Bucharest
Collection: Skillful hands
Year of publication: 1962
Did you know that ...? Since the year of the first transistorized receiver (1954, in the USA and 1956 in Europe), was the trend of production and use of tube radio receivers decreasing drastically, especially in the West?
La Electronics - Bucharest the production of transceivers with transistors started in 1959 with an insignificant number, in the following year producing 1992 pcs., and in 1961 - 49835 pcs.
What does the book present?
Dear radio amateurs, the purpose of this paper is to put in your possession a basic technical documentation for the construction of transistor receivers, to improve your electronics, and not to make you spend unnecessarily and to discourage you.
It is good to know from the beginning that the transistor is also a defective part, especially when you do not know it. If you give it the attention it deserves, it gives you maximum efficiency. The modern radio amateur no longer boasts, as in the past, how many "lamps" burned was chosen from the installations made, but with the number of correctly executed installations.
Do not make the reprehensible mistake of trying to build a complicated receiver with many transistors, as long as you are not used to working with this part. Pay special attention to the schemes with many transistors that seem simple at first sight! Don't forget: "hurry spoils the job"!
If you want to make a device with transistors, please read carefully all the work from the first to the last tab and only then start experimenting with the simplest assemblies. We know you won't stop there. But they will teach you interesting things, phenomena that can only be understood through practice.
Do not make the unforgivable mistake of going straight to the construction of a complicated assembly, just because you are in possession of all the necessary parts - you will destroy them without result. Do not forget that the acquisition of any technique or qualification is obtained only through sustained work.
A tip: do not limit yourself only to this work. Read everything you find in the literature! Many issues have not been addressed in this paper, in order to simplify it.
We consider, however, that if the paper will make you make a transistor receiver yourself and teach you to orient yourself in the literature, then its purpose is achieved. Increase work!
The structure of the book
CHAPTER I - DEAR YOUNG RADIO AMATEURS - NEW ELEMENTS IN ELECTRONICS
The transistor and the diode
CHAPTER II - HOW TO MOUNT THE TRANSISTOR
Transistor mounting systems
Be careful when mounting the transistors!
Assembly and assembly methods
About the notations used and some other tips
CHAPTER III - PARTS OF ASSEMBLIES WITH TRANSISTORS
Coils with iron core
Miniature electrolytic capacitors
Semi-adjustable capacitors (trimers)
Miniature variable capacitors
Construction of miniature speakers
CHAPTER IV - AND NOW AT WORK!
Single transistor receivers
CHAPTER V - AMPLIFICATION STAGES
Audio frequency amplifiers
Radio frequency amplifiers
CHAPTER VI - RADIO DEVICES WITH MORE TRANSISTORS
Receiver with two transistors
Reflex mounting with two transistors
Reflex mounting with three transistors
Receiver with "npn" and "pnp" transistors
Receiver with four transistors
Receiver with five transistors
CHAPTER VII - SUPERHETERODINE RECEPTORS
A little theory
Superheterodyne with a transistor
Superheterodyne with four transistors
Superheterodyne with seven transistors
CHAPTER VIII - RECEPTION OF SHORT WAVES - POWER SUPPLY OF RADIO RECEPTORS
Recharging the batteries
Mains power supply
CHAPTER IX - MEASURING AND CONTROL APPARATUS
Audio frequency generator
CHAPTER X - WHAT CAN BE DONE WITH A DEFECTIVE TRANSISTOR?
He broke an end
Transistors with exaggerated fascia
1,621 total hits, 5 hits today