My friends, you may download any chapters whatever you want! Please, for copyright watch Cover + Contents!
ANTENTOP- 01-2008
|
Cover +Contents 390 KB (Cover + Editoroal + Cotenst (pp.:1- 4 ) |
Antenna Theory
Polarization and Related Antenna Parameters : by: Prof. Natalia K. Nikolova
Dear friends, I would like to give to you an interesting and reliable antenna theory. Hours
searching in the web gave me lots theoretical information about antennas. Really, at first I
did not know what information to chose for ANTENTOP.
Now I want to present to you one more very interesting Lecture - it is a Lecture Radiation from
Infinitesimal (Elementary) Sources. I believe, you cannot find such info anywhere for free!
Very interesting and very useful info for every ham, for every radio- engineer.
Radiation from an infinitesimal dipole. Duality in Maxwell's equations.
Radiation from an infinitesimal loop. Radiation zones.
Receiving Antennas
2
Atmospheric Current: Practical Experiments: By V. T. Polaykov, RA3AAE, Ph. D in technical science
The Article describes some experimenters that prove the mysterious current from the Broom Antenna
Expedition Two Element Antenna for the 20-meter Band: By N. Filenko, UA9XBI
The antenna was designed for using at DX- peditions. Antenna consists of two elements- mast in
height 10 meters and in diameter 30-50-mm (it is reflector) and a dipole for the 20-m (it is driver).
Simple All- Band HF- Antenna: By Eugene Erohov (US4EM)
Dream of each of amateurs working from a hard for antenna installation conditions to have a small
invisible antenna for all bands. I have tried to solve the dream. My all band antenna is something
middle between T2FD and loaded Loop.
Rectangular UB5UG: By Yuri Medinets, UB5UG, Kiev
Rectangular shown at Figure 1 has good parameters and not so sensitive to height (that is very
important for low amateurs HF-ranges) compare with dipole. Upper horizon wire is broken by a nut
insulator at it's center. Due to a small height the antenna is suitable for 80- and 40-meters
Band.
Delta Loop UN7CI for 7, 10, 14 and 21- MHz: By Boris Popov (UN7CI), Petropavlovsk, Kazakhstan
The antenna was designed to work from a field conditions at amateur's bands 7, 10, 14 and 21-MHz.
The antenna has SWR less the 2.0:1.0 at height of the
lower side 1.2 meters above the ground. Antenna has good efficiency.
7
Vertical UN7CI for 7, 14 and 21- MHz: By Boris Popov (UN7CI), Petropavlovsk, Kazakhstan
The antenna was designed for amateur's bands' 7, 14 and 21-MHz. Antenna fed throw 50-Ohm coax.
The antenna has SWR less the 1.5:1.0 at any band. Antenna has good efficiency and low angle of
radiation at vertical plane (that is good for DX-ing). Only one power relay is used to switch
a working band.
35-36
Delta for 80 and 40- meters: By Valentin, RZ3DK
The Delta for 80 and 40 meters was designed for installation on the roof of a building with
help of a metal mast. Matching of the antenna at both bands is possible with the help of the
length of 75-Ohm Coaxial in 4.82-meters.
VHF- Antenna Practice
Two Elements YAGI for 145 MHz: Balcony Project: By Aleksandr, RZ3AIX
Well, why I did a Two- Elements YAGI? Why not Three, Four or more Elements YAGI? Or, say, so
popular 2-5/8 or 3-5/8 Vertical Collinear Antenna?
Simple Weekend Antenna for 145-MHz: By Igor Lavroushov UA6HJQ
Yes, I need an antenna for 144-MHz. Not just antenna, but antenna that can work in different
conditions, from my home, from a car, from my mountain trip. Have been tried different design
I suddenly stopped to those one. It is two elements YAGI that is very simple to design but has
good characteristics.
11
Fixture for Fast Assembling of VHF- Antennas: By Il'ya Yarushkin, UA9UKO
The Fixture is intended for fast assembly and disassembly of VHF antennas. It is very useful
for experimenters with the antennas or assembling of portable VHF- antennas.
49- 50
12
AN
Water Pipe T-Joint at VHF Antennas: By N. Filenko, UA9XBI
By the way, I was (and may be am) not an experienced VHF- man before I decided to do my VHF
YAGI. I had serous doubt that I spoiled lots stuff while I made my YAGI. So I found for solution
how to do the antenna without turning in garbage my antenna's material.
P.A.
Matching a Transceiver with PA on several GU50: By N. Filenko, UA9XBI
Matching input of PA that contained several tubes GU50 with a transceiver is not a simple matter
as it seems at first look. Sometimes for simplicity of the
design PA the driver power from a transceiver going straight away to several connected to bridge
cathodes of the GU50.
45
2xGU50 and 3xGU50 PA from UA1TAT: By Yaroslav Zhukov, UA1TAT
Two simple schematic PA made on Russian popular tubes GU50.
PA 3xGU50. Photos of the Design: By N. Kisel, UA3AIC
Photos show how to do a simple PA 3xGU50.
16
PA 2xGU50. Photos of the Design: By N. Kisel, UA3AIC
Photos show how to do a simple PA 2xGU50.
61
PA 5xGU50. Photos of the Design: By N. Kisel, UA3AIC
Photos show how to do a simple PA 5xGU50.
18
Simple Broadband P.A.: By Igor Grigorov, UA3ZNW
The P.A. is very simple. It is usual push- pull with some tricks which allows to make the P.A.
in easy style.
63- 68
19
Matching Circuit for Tube PA: By Sergey Lebedev, UA0UG
As usual, at a Vacuum Tube PA an output tube is matched with antenna with help of a p-circuit.
It is refer to use switching inductors or variometer. This matching circuit can work from 3- 30-MHz
without switching inductors. The circuit is widely known among radio amateurs of 9-0 amateurs
region of Russia.
69
Free E- Books
QRP Transceivers and PAs from Accessible Part.: By Igor Grigorov,
UA3ZNW
(*pdf), 38 pages.
Book in English "QRP Transceivers and PAs from Accessible Parts " (*pdf), 38 pages is
a translation of Russian Book "QRP Transceivers and PAs from Accessible Parts " (*pdf),
28 pages. Russian version was published by me (on my own expenses) in 1991, in Belgorod, Russia.
I had printed 2000 samples of the book.
Of course, it was not best paper used for the book as well as not good quality of printing. The
book describes kits which my own company ("Vibrissa") produced at the times. Naturally,
the book was the manual for the kits. Were produced 400 kits of TST (Tube- Semi- conductor- Transceiver)
near 50 of them were assembled by me for customers, 200 kits SQT (Semi- conductor- Quartz- Transceiver),
near 30 were of them were assembled by me for customers, 200 kits of PA, near 60 were of them
were assembled by me for customers. Of course, the book will be interesting for all amateurs,
not only for QRP- funs
CQ- QRP- 03
U- QRP- C was alive only 9 years, from 1986 to 1995. At the times the club had managed lots deals.
At first were united QRPers from all former USSR. It was the base for recently QRP Clubs of the
former USSR- for RU- QRP- C and for UR- QRP-C. At second, a new amateur code "72" was
accepted in the ham World due to efforts of Oleg Borodin, former president of the U- QRP-C. At
third, 3 nice QRP- magazines were printed out. One of the magazines, CQ- QRP # 3 is pasted to
AntenTop Library. The magazine is in Russian, but the schematics are international understandable.
CQ- QRP- 02
U- QRP- C was alive only 9 years, from 1986 to 1995. At the times the club had managed lots
deals. At first were united QRPers from all former USSR. It was the base for recently QRP Clubs
of the former USSR- for RU- QRP- C and for UR- QRP-C. At second, a new amateur code "72"
was accepted in the ham World due to efforts of Oleg Borodin, former president of the U- QRP-C.
At third, 3 nice QRP- magazines was printed out. One of the magazines, CQ- QRP # 2 is pasted to
AntenTop Library. The magazine is in Russian, but the schematics are international understandable.
23
Book "Radio Antenna Engineering" by Edmund A Laport,
Chief Engineer, RCA International Division, Radio Corporation of America, Fellow, Institute of
Radio Engineers 1952
--- Scanned and Prepared by Dave Platt AE6EO---
About the book comment by Dave Platt AE6EO: "Radio Antenna Engineering is certainly of significant
historical interest, and may be of practical use as well. Although some of the designs and practices
portrayed in it have been supplanted in commercial service, much of its content can still be of
significant value to amateur-radio operators and to those interested in the practical aspects
of high-power radio operation in the lower-frequency RF bands..."
Just brief description, photos and schematic diagram.
73-75
Keys
24
CW Key That Never Have Been Smallest: By Igor Lavroushov UA6HJQ
This micro key newer will be heavy for any mountain radio-expedition. It is possible to use the
key as backup or ever as main key of the amateur radio. This key may be used at tuning antennas
with hand- control tuner (for example like MFJ- 902). For example the key may be used for tuning
ATAS- 25 with YAESU FT8x7 (FT817, FT 857, FT897). Okey, go ahead to make it!
76- 77
Simple "PIC- KEY": By Mike Kislinsky, RX9CBI
This simple "PIC- KEY" provides sending Morse Code in two modes. First, that was written
in the memory (four memory cluster), second, with hand jambic manipulator.
QRP Transceivers
Transceiver SQT: By Igor Grigorov, UA3ZNW
Transceiver SQT (Semiconductor Quartz Transceiver) firstly was described at book "QRP Transceivers
and PAs from Accessible Parts." The book (in Russian) is at Antentop Free Library. The article
is English translation of the Russian one. Shortly about SQT:
DC CW Transceiver, X- tall VFO, VFO range up to 20 kHz (depenfs on used crystal), 50-Ohms Antenna,
head-phone RX with sensetivity near 1- micro-Volt, Power Supply is 12-V, RF out is near 1-Wtts,
any HF- amateur band or 2-3 amateur band (options, depends on used crystal), made on transistors.
Useful Data
Logos of ex- USSR Electronics Factories
The table shows Logos of Electronics Factories used in ex-USSR. Some of the Logos are used up
to our days
|
Just for Fun:
|
|
|
|
Last update: January 18, 2009 20:56