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ANTENTOP- 01-2007

 

 

 

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Antenna Theory

 

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1

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 Polarization and Related Antenna Parameters

Polarization of EM fields - revision. Polarization vector. Antenna
polarization. Polarization loss factor and polarization efficiency.


5-21

 

 

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HF Antenna Practice

 
2

BA- Butterfly Antenna : by: N. Filenko, UA9XBI

The antenna is a version of a shunt fed loop (Reference 1). However, the antenna has some advantage compare to its prototype

 

22- 26
 

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3

UR5WCA Balcony Antenna for 7, 10 and 14 MHz: by: Valeriy Prodanov, UR5WCA

As I am an urban resident I have not a sufficient place for my antenna. My balcony placed at 2- floor at 5- store building is my sole antenna polygon. So, I have done a balcony antenna for my favorite 7, 10 and 14 MHz- ranges. It is a helical vertical that can be matched for these bands.

 

27- 29
 

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4

Circle Antenna: By Simuhin Aleksandr, RA3ARN

How is it happened that I did the antenna? Propagation on the 10 meter band pushed me to do the antenna. Propagation was coming, but I had not any antenna at my cottage. I really need an antenna. I have red at a text book that antenna having shape like a circle has a good characteristics. So, I decided to do a "Circle Antenna" and went to a local Home - Repair store for stuff for the antenna

 

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Receiving Antennas

 
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Mystery of the Broom Antenna : by: V. T. Polaykov, RA3AAE, Ph. D in technical science

Well known in Russia broom antenna has some mysterious property. What is the property- the puzzle try to solve Vladimir Polaykov.

31- 38
 

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UHF Antennas

 
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J-Pole Antenna for 433 MHz : Design by Alexey Kostyuk, EW1LN

Just Design of J- Pole Antenna for 433 MHz

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Antenna 'Triplet Quad' for 433 MHz: Design by Alexey Kostyuk, EW1LN

Just Design of Triplet Quad for 433 MHz



 

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VHF Antennas

 
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144-MHz Antenna for Satellite Communication : by: ex RB5VD

The simple antenna was tested at satellite communication. Signals from an amateur satellite (when the satellite was in visible sphere) were fine. Also the antenna worked well at local and DX QSOs.

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SIMPLE KEYS

 
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Simple Iambic Key on PIC16F628A: by Kluyihin Alexandr, RU3GA

Just very simple Iambic Key made with PIC16F628A

 

 

43-45
 

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TRANSCEIVERS

 
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Tube - Semiconductor Transceiver (TST) : by: va3znw

Transceiver TST was published in my book- "QRP Transceivers and PAs from Accessible Parts "
The book was published by me (on my own expenses) in 1991, in Belgorod, Russia. I had printed 2000 samples of the book. The book describes kits which my own company ("Vibrissa") produced at the times. Fist such kit was transceiver TST. Were produced 400 kits of TST (Tube- Semi- conductor- Transceiver) near 50 of them were assembled by me for customers. Of course, may be some design of the transceiver seems to be old for the days, but what I can say, the transceiver works, and works not bad.

 

 

 

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RECEIVERS

 

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Simple SWL HF- VHF Receiver: From the book "DX Reception" (by Igor Grigorov (RK3ZK), Belgorod, 1994), pp.:76- 81.

Using only 4 cheap surplus transistors and 1 mixer SBL- 1 you can do a HF- VHF receiver that provides good reception on HF (12- 29- MHz) and ex- Soviet BC FM VHF- 61- 88 MHz. Receiver catches AM and FM with deviation more the 25 kHz. Such receiver allows very quickly to find a propagation on the spectrum of HF and VHF bands.

O

 

 

58- 63

 

 

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PROPAGATION

 

 

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AN

Long Delay Echoes

LDE… Several articles on LDE were published at Antentop (use google search engine to find all articles at the site). Evidence of different people from different countries shows that LDE is not a myth, LDE is the reality.

Subject "LDE" at www.qrz.com was appeared at hot summer 2007. Lots interesting commentaries were at the topic. Some of the replies (thanks for courteously permission of the authors) were pasted here. Next ball to reality of the LDE

OP

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13

Time Warp

Article Radio Signals out of Our Times was published at Antentop 01- 2006 as well as at www.cqham.ru. Below I paste only the feedback on the article from www.cqham.ru. Also I paste a feedback received by me on my email. You see, another hams also have met something like Time Warp in the Air….

 

68- 70

 

 

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QRP Homebrewer

 
14

Key for K1 : by: va3znw

Just photos and schematic of an easy- build home- made key....

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Free e- book

QRPanteop

 
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"QRP Transceivers and PAs from Accessible Parts ": by Igor Grigorov, UA3ZNW

(*pdf), 28 pages.

Book in Russian. The book 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.

Book weights 6,2 MB, so, it may take time to download.

Below you can see the Contents of the book and path to download.

 

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DX Reception.:by Igor Grigorov, RK3ZK

Book in Russian "DX Reception" was published by me in 1994, in Belgorod, Russia. It was printed (for my own expenses) 2000 samples of the 96- pages book. Only 1 of them I have in my stock for now.

A long time I have been a fan of DX- SW radio reception. Till now I with great enjoy listen SW radio. It is really fan for me. The book contains description of antennas, some useful circuits, advices for DX- reception. All the antennas and circuits were proved by me.

Book weights 13,3 Mb, so, it may take time to download.

Of course, the book will be interesting for all amateurs, not only for fan of DX- SW Radio..

Below you can see the Contents of the book and path to download.

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HISTORY

 
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RAEM/mm Is My Callsign: by Ernst Krenkel, RAEM. (Translated in English by G4AYO

The last voyage of E.T. Krenkel - a voyage to the Antarctic Circle, took place in 1968. He headed a voyage of the scientific-research vessel Professor Zubov, which was bound for the shores of Antarctica to relieve its staff of winterers found there, and also for oceanographic research.
Below we publish extracts from the diary of E.T. Krenkel, which he kept during the voyage on the Zubov. He was a gifted narrator, graphic, with apt language in which were no trite sentences or clumsy wording. Ernst Teodorovich appears before us as a very ordinary man who with boyish ardour is concerned with his daily watch on the air for radio amateurs.

 

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Application for HF- VHF radio amateur station

History goes away out of us… We lost in time papers, things and may be something else. That is why AntenTop published some old papers, old schematics, old photos.

At this stuff you can see a copy of an application for a radio-amateur station. This application was used from 1965 till 1995 in the USSR, then in Russia.

Below you can see thetranslation of the application and the scan of an original paper.

 

80- 82

 

 

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Old Equipment

 

 

 

 

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Russian Receiver R- 311

Just brief description, photos and schematic diagramm.

 

 

 

83- 84

 

 

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Russian Receiver R- 326

Just brief description, photos and schematic diagramm.

85- 88
 

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Useful Data

 
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TV Channels and Frequencies

Just List of frequencies/Channels used by NTSC TV


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22

FM Radio Channels and Frequencies

Just List of frequencies/Channels used by FM Radio

 

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One Coil Loop: Igor Grigorov, RK3ZK

Hams often use One Turn Loop in their homebrewing. Such Loop may be used in a transmitting/receiving HF- VHF Magnetic Loop Antenna , in a simple VHF oscillator working on transmitting without antenna , in receiving VHF antenna for simple VHF receiver.

 

 

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Inductor Data

It is easy to find the inductance of an inductor using equation shown on Figure 1. However, very often ham use for implementation of the inductor some normalized forms. So, it is possible to do tables that are contained data for such forms. Just tables with inductance data.


 

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25

Lightning Tank Calculator

Very often an amateur need calculate parameters of resonator tank (see Figure ). Certainly, there are lots programs that can do the calculations. However very quick and with acceptable tolerance amateur can do it using given here Table.


 

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Capacitor Code

Just Number, Letter and Color Capacitor Code


 

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Inductor Color Code

Just Inductor Color Code

 

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Last update: March 29, 2016 8:35