|
|
 |
 |
 |
|
|
Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an
Special page devoted to
Table of Contents Antentop 01- 2016 (020)
Custom Search
ANTENTOP- 01- 2016, # 020
|
Table of Contents
|
||||
|
|
|
||||
Table of Contents
|
|||||
|
|
|||||
|
|
|
Page
|
|||
|
|
Cover
+Contents
|
1- 4
|
|||
|
|
Antenna
Theory
|
|
|||
|
1 |
PLANAR ARRAYS, CIRCULAR ARRAYS 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 chose for ANTENTOP. Now I want to present to you one more very interesting Lecture - it is
LECTURE 18: PLANAR ARRAYS, CIRCULAR ARRAYS. Planar arrays
are more versatile; they provide more symmetrical patterns with
lower side lobes, much higher directivity (narrow main beam).
They can be used to scan the main beam toward any point in space... |
5- 18 |
|||
|
|
HF- Antenna Practice
|
|
|||
|
2 |
Below there are described three Helical Antennas.
All of the antennas were made and tested by RX3MS. The antennas
later were repeated at several amateur's stations and the antennas
showed good efficiency |
19- 22 |
|||
|
3 |
I took the decision.
At last! I took the decision to participate in CQ- WW- 160- Meter
Contest. My setup for the Contest was IC- 718 and Beverage Antenna
described at Antentop- 01, 2015. The
antenna had termination resistor 450- Ohm/25-Wtt. It allowed me
run the IC-718 on 50-Wtt without damage to Beverage's termination
load. So I decided participate in the Contest as a Low Power (up
to 150-Wtt) Single Operator... |
23- 29 |
|||
|
4 |
Attic
Antenna for 40-, 30-, 20-, 17-, 15-, 12 and 10 meter Band The antenna was installed in the
attic. Antenna was matched with help an Automatic ATU in 40-,
30-, 20-, 17-, 15-, 12 and 10 meter amateur Bands. The Antenna
worked satisfactory on the above mentioned bands........ |
30 |
|||
|
5 |
Simple
Magnetic Loop Antenna for a Journey The Magnetic Loop Antenna is designed
especially for working from journey. The Antenna is ready for
operation from disassembled to assembled condition in several
minutes. Antenna contains cheap or not hard to find stuff. I spend
less $ 50.0 for kit for the antenna. ...... |
31- 32 |
|||
|
6 |
Beverage
Antenna. Theoretical Look on Practical Result My Beverage Antenna (that was described
at: http://www.antentop.org/019/va3znw_019.htm. The antenna was successfully tested at CQ WW 160- Meter Contest (CW),
CQ WPX (2016, CW) and ARRL International CW Contest (2016). I
worked there with my IC- 718 using only 50... 90- Wt. |
33- 45 |
|||
|
7 |
UA6AGW
Antenna V. 20-10.51 (14.0- 29.5- MHz) UA6AGW Antenna V. 20-10.51 can work in frequency
range from 14.0 to 29.5 MHz that is covered 20. 17, 15, 12 and
10- meter amateur Bands. This is provided by tuning the antenna
in resonance to the used band with help of a remote- control variable
capacitor installed at the antenna. UA6AGW Antenna V. 20-10.51
is designed for easy and quick installation in the field.... |
46- 49 |
|||
|
8 |
Three
Element YAGI Antenna for the 20- meter Band Below described three elements
YAGI for the 20- meter Band. Model of the YAGI was simulated by
UR0GT. The antenna has very high gain- almost 14.4- dB at central
frequency 14.15- MHz. Antenna covers all 20- meter band with SWR 2.5: 1.0
at the edges... |
50- 51 |
|||
|
9 |
Compact Antenna for 160- meter Band for the
DX- Window Below described Compact Antenna for 160- meter Band for the DX- Window.
Model of the antenna made by UR0GT. Antenna has "compact"
sizes related to the 160- meter band. However with the dimensions
the antenna has good parameters at the DX- Window at the 160-
meter Band..... |
52- 53 |
|||
|
10 |
Low
Height Narrow Delta Antenna for the 80, 40, 20 and 15- meter Band Below described Low Height Narrow
Delta Antenna for the 80, 40, 20 and 15- meter Band. The Antenna
was simulated by UR0GT for DE7RAO, for his defined conditions
of possibility for antenna placement. However the antenna design
should be interesting for those amateur who has tied conditions
for antenna installation or for amateurs who participated in field
day. .... |
54 |
|||
|
11 |
Simple HF Antenna
for the 20-, 17-, 15-, 12- and 10- meter Band Below described a very simple HF Antenna for the 20-, 17-, 15-, 12- and
10- meter Band. Antenna is fed by 50- Ohm coaxial cable. Antenna
has very simple design and does not require any tuning if it made
according the drawing.... |
55 |
|||
|
|
VHF ANTENNAS |
|
|||
|
12 |
Simple
Vertical Antenna for the 6- and 2- meter Band Below described
simple dual band vertical antenna for the 6- and 2- meter Band.
Model of the antenna was simulated by RW4HFN. Antenna may be made
from a rigid copper/aluminum wire. Antenna does not require any
tuning elements. Antenna made according to the description already
should work at the two bands..... |
56- 58 |
|||
|
13 |
Stub
Vertical Antenna for the 6- and 2- meter Band Below described
simple dual band vertical antenna for the 6- and 2- meter Band.
Model of the antenna was simulated by RW4HFN. Antenna may be made
from a rigid copper/aluminum wire. Antenna does not require any
tuning elements. Antenna made according to the description already
should work at the two bands.... |
59- 61 |
|||
|
14 |
Dual
Cross Vertical Antenna for the 6- and 2- meter Band Below described simple dual band
vertical antenna for the 6- and 2- meter Band. Model of the antenna
was simulated by RW4HFN. Antenna may be made from a rigid copper/aluminum
wire. Antenna does not require any tuning elements. Antenna made
according to the description already should work at the two bands.... |
62-64 |
|||
|
15 |
Simple
Three Element Vertical Antenna for the 2- meter Band Below described simple three
elements vertical YAGI for the 2- meter Band. Model of the YAGI
was simulated by RW4HFN. The antenna is very simple to make and
tune. Antenna may be made from a rigid copper/aluminum wire.... |
65- 66 |
|||
|
|
UHF ANTENNAS |
|
|||
|
16 |
Short
Five Elements Antenna for the 70- cm Band Short
Five Elements Antenna (length 50- cm) made of aluminum rod (or
tube) in diameter 5- mm. Antenna designed for repeater sub- band.
Antenna has gain near 7.4- dBd at 439.0-
MHz. F/B at the frequency is 35.9 dB.... |
67-68 |
|||
|
17 |
Broadband
Five Elements Antenna for the 70- cm Band Broadband Five Elements Antenna (length 50- cm) designed on the base
of Short Five Elements Antenna for the 70- cm Band (Antentop
01- 2016). The antenna has low SWR at the upper edge of the 70-
cm Band. Antenna made of aluminum rod (or tube) in diameter 3-
mm. Antenna has gain near 7.2- dBd at
439.0- MHz. F/B at the frequency is
35.3 dB..... |
69- 70 |
|||
|
|
Propagation |
|
|||
|
18 |
Article about Black Holes in the Air was published in Antentop Magazine http://www.antentop.org/black_holes.htm.
As I mentioned there I did not observe Black Holes in the Air.
At those times I say no. Time lasts... It happened in March- 2013
... |
71 |
|||
|
|
Tube DC Receivers |
|
|||
|
19 |
Simple Two Tube Direct Conversation Receiver
It is very simple DC receiver contains only two tubes. No one semiconductor
there is here. This receiver made by me on the base of Kazuhiro
Sunamura 12V- Tube receiver.... |
72 |
|||
|
20 |
Simple Four Tube DC Receiver for the 80-
meter Band The
receiver was made on the base of my experimenters with simple
DC receiver described at previous article (Simple Two Tube Direct
Conversation Receiver) and on the base of the receiver Kazuhiro
Sunamurà. There were used very
old tubes however the receiver worked well with those ones. .... |
73- 74 |
|||
|
|
Regenerative
Receivers |
|
|||
|
21 |
Simple regenerative
Receiver BARER 1 The very simple regenerative receiver was
made for 40- meter ham band. The receiver worked very stable.
You did not need tune the R10 (Regeneration) through the band
once it is already adjusted. The receiver was compared with two
commercial ones- TECSUN PL600 and DEGEN- 1103. My regenerative
receiver worked much better on the 40- meter band.... |
75 |
|||
|
|
Experimenters |
|
|||
|
22 |
Experimenters with
Non Snap Ferrite Cylinder Bead RF Chokes Recently there
are lots devices that contained some RF sensitive or vice versa
RF generation parts inside. It is power AC/DC converters (aka
power supply), Computers, Computer Monitors, et cetera. Most common
way to radiate unwanted interferences or receipt unwanted interferences
is cables going apart those above mention parts.... |
76- 81 |
|||
|
|
History |
|
|||
|
23 |
Time Machine.
QSLs from the Past from E- QSL. I had three call signs
when I have been lived in Russia. It is UA3ZNW (1983- 1990), UZ3ZK
(1990- 1993) and RK3ZK (1993- 2004). There were made near 30 thousands
QSOs, I got several boxes of QSL Cards. However, I managed bring
to Canada less the 100 cards from different calls.... |
82 |
|||
|
24 |
There are lots articles
on Beverage Antenna. However one of the most important one is
"Memorandum on the Beverage Wave Antenna for Reception of
Frequencies in the 550 - 1500 Kilocycle Band" by Benjamin
Wolf and Adolph Andersen, dated April 1, 1958. On the report there
were based lots amateur and science researches on the topic Beverage
Antenna...... |
83- 90 |
|||
|
|
BOOKs |
|
|||
|
25 |
High- Height Invisible Antennas Light description of the book
and link to download.... |
91 |
|||
|
26 |
Light description
of the book and link to download.... |
92 |
|||
|
27 |
Direction
Finding Handbook for Wireless Operators : by: W. E. Crook Preface to Second Edition:
In preparing the second edition of this work, it was left desirable
to extend its scope and cover the interests of the aircraft operator.... |
93 |
|||
|
|
Patents |
|
|||
|
28 |
Just description of the patent..... |
94- 100 |
|||
 |
 |
|
 |
|
|
|||
Just for Fun:
Powered byIP2Location.com
Thanks for your time!
Last Updated:
January 4, 2020 22:33
