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Radio Systems by: Basu (VU2NSB)
April 24, 2015, 03:35
Fundamentals of Amateur Radio Systems Take a look at some of the fundamentals of the amateur radio system. Technologies related to radio system…
- Genesis & Evolution of Radio by: Basu (VU2NSB)
  May 8, 2015, 01:09
- Radio Signal Modulation Principles by: Basu (VU2NSB)
  March 9, 2020, 01:09
  Introduction to Radio Signal Modulation For serving the purpose as a practical communication medium, the radio wave has to undergo a proces…
- Elements of Amateur Radio Station by: Basu (VU2NSB)
  March 20, 2020, 01:09
  Amateur Radio Station (Ham Shack) A thoughtfully set up amateur radio station (Ham Shack) goes a long way to provide a pleasant and fulfilling …
  - Radio Communication Microphones by: Basu (VU2NSB)
    May 7, 2020, 21:20
    Radio Communication Microphones - The Untold Story How to optimally set up and use a microphone in a radio communication environment? This is…
  - Radio Transceiver S-Meter - Pitfalls to avoid by: Basu (VU2NSB)
    May 21, 2020, 17:18
    Radio Transceiver S-Meter - Lesser known facts An S-meter of an HF radio transceiver is a very important instrument on the rig and is used …
- Geodesy for Terrestrial HF Radio by: Basu (VU2NSB)
  April 18, 2020, 01:09
  Geodesy and Maps for Terrestrial HF Radio Acquiring a working knowledge of the basic concepts of Maps and Geodesy for terrestrial HF radio co…
  - The Great Circle Map - GCM by: Basu (VU2NSB)
    January 10, 2023, 20:28
    The Great Circle Map - GCM We present an automatically rendered Great Circle Map - GCM based on your location derived from your Internet IP…
  - Antenna Bearings - Geodesic Map by: Basu (VU2NSB)
    January 18, 2023, 18:13
    Antenna Bearings - Geodesic Map We present automatically rendered Bearings with Geodesic Paths projected on a Rectangular Map. Each geodes…
- International Radio standards by: Basu (VU2NSB)
  May 8, 2015, 01:09
  No description found for this item.
- Radio Communication Architecture by: Basu (VU2NSB)
  May 8, 2015, 01:09
  No description found for this item.
- Ham Radio Operating Procedures by: Basu (VU2NSB)
  May 8, 2015, 01:09
  No description found for this item.
Antenna by: Basu (VU2NSB)
April 24, 2015, 03:40
Good Antenna for any Radio Station is vital The importance of antennas for radio communications can never be over-emphasized. A radio station i…
- Antenna Fundamentals by: Basu (VU2NSB)
  May 2, 2019, 04:20
  Introduction to Antenna fundamentals In this section, we will examine some of the fundamentals of radio communication antennas. Acquiring a sou…
  - Principles of Radiation by: Basu (VU2NSB)
    August 26, 2019, 04:35
    How does antenna radiation occur? The basic question before us is how does an antenna work? Why does antenna radiation occur? Why does a wire c…
- Omnidirectional Antennas by: Basu (VU2NSB)
  September 29, 2019, 04:24
  Introduction to Omnidirectional Antennas In the literal sense, an Omnidirectional antenna is an antenna that radiates uniformly in all di…
- Wire Antennas by: Basu (VU2NSB)
  October 6, 2019, 04:26
  HF Wire Antennas - A Primer When we speak about wire antennas, the first and foremost thought that comes to mind is the 1/2λ Dipole …
  - The Ubiquitous Dipole Antenna by: Basu (VU2NSB)
    April 28, 2020, 18:38
    The Center-fed Half-Wave Resonant Dipole Antenna The Dipole antenna is perhaps structurally the simplest antenna to fabricate and deploy. It …
  - Inverted V Antenna - A popular Dipole variant by: Basu (VU2NSB)
    June 9, 2020, 18:00
    The Center-fed Half-Wave Dipole Inverted V Antenna An Inverted V antenna is a very popular variant of the standard horizontal dipole. In his …
  - Multiband End-fed Half-wave EFHW Antenna by: Basu (VU2NSB)
    May 1, 2021, 21:05
    Multiband End-Fed Half-Wave EFHW Antenna The End Fed Half Wave antenna or the popularly known EFHW antenna has been around almost ever sinc…
- Yagi Antennas by: Basu (VU2NSB)
  October 7, 2019, 04:28
  How do Yagi Antennas work? A Yagi-Uda antenna popularly known as the Yagi antenna is perhaps one of the finest inventions ever made in th…
- Cubical Quads & Delta Loops by: Basu (VU2NSB)
  October 9, 2019, 04:30
  Cubical Quad antennas and Delta Loops When we think of a Cubical Quad or a Delta Loop, the picture that we usually visualize is a large multi…
- Log Periodic Dipole Array (LPDA) by: Basu (VU2NSB)
  October 29, 2019, 00:22
  Log Periodic Dipole array (LPDA) The Log Periodic Dipole Array, popularly known as the LPDA antenna, belongs to a broader family of Log-Periodi…
- Stacked Antenna Arrays by: Basu (VU2NSB)
  October 31, 2019, 00:12
  How do Stacked Antenna Arrays work? Stacked Antenna Arrays or Stacked Array is usually referred to as a set of directional antennas like the Ya…
- Miscellaneous Antennas by: Basu (VU2NSB)
  November 5, 2019, 04:59
  Classic miscellaneous antennas for communication Under our section on Miscellaneous Antennas, we will cover a variety of well-known antennas …
Propagation by: Basu (VU2NSB)
April 24, 2015, 03:42
Understanding Radio Propagation The study of principles of propagation of electromagnetic waves and acquiring a reasonably good working knowled…
- Fundamentals of Radio Propagation by: Basu (VU2NSB)
  November 7, 2019, 01:58
  An Introductory Primer on Radio Propagation A good understanding of various radio propagation phenomena is vital to leverage propagation cond…
- VHF/UHF & Free Space propagation by: Basu (VU2NSB)
  November 10, 2019, 01:58
  VHF/UHF & Free Space Propagation - A primer Radio wave propagation across the entire spectrum including VHF, UHF, and microwave primarily depen…
  - Atmospheric impact on VHF Radio Propagation by: Basu (VU2NSB)
    September 20, 2020, 02:39
    Atmospheric influence on VHF Radio Propagation The overall influence and impact of atmospheric conditions on VHF radio propagation are quite …
  - Terrestrial VHF Radio Signal Coverage - LOS by: Basu (VU2NSB)
    November 1, 2020, 17:02
    Terrestrial VHF Radio Signal Propagation - LOS Though VHF/UHF radio is very popular, why do the terrestrial VHF radio signal coverage losse…
  - Terrestrial VHF Radio Signal Coverage - BLOS by: Basu (VU2NSB)
    November 9, 2020, 03:07
    Terrestrial VHF Radio Signal Propagation - BLOS This is part-2 of the two-part article series on Terrestrial VHF Radio Signal Coverage. Thi…
  - VHF Propagation Path Profiler - Web App by: Basu (VU2NSB)
    March 15, 2023, 23:46
    Terrestrial VHF Propagation Path Profiler The VHF Propagation Path Profiler presented here is a comprehensive application that allows us to…
- Ground Wave Propagation by: Basu (VU2NSB)
  November 18, 2019, 01:58
  Is it Ground Wave or surface Wave propagation? Both the terms ground wave propagation, as well as surface wave propagation, are relevant. Howev…
  - HF Surface Wave Propagation (Ground Wave) by: Basu (VU2NSB)
    November 22, 2020, 01:12
    HF Radio Surface Wave propagation (Ground Wave) Surface Wave propagation and coverage on the HF radio bands is well known to radio amateu…
- Solar Activity and Ionosphere by: Basu (VU2NSB)
  November 19, 2019, 01:58
  Solar activity and its influence on Ionosphere The most exciting and intriguing aspect of radio propagation is Solar activity leading to the cr…
  - SSN, SFI, Solar Data for HF Propagation by: Basu (VU2NSB)
    March 23, 2021, 19:20
    SSN, SFI, Solar Data for HF Radio Propagation Here are some of the important Solar activity parametric data that are responsible for influenc…
- Ionospheric Skywave Propagation by: Basu (VU2NSB)
  November 20, 2019, 01:58
  Ionospheric Skywave Propagation - A Curtain Raiser The most important propagation mode for HF radio communication is Ionospheric Skywave prop…
- Noise in Radio communication by: Basu (VU2NSB)
  November 24, 2019, 03:37
  Introduction to Radio Communication Noise As important as the desired signal, the aggregate undesired noise in radio communication is a facto…
- Radio Propagation Forecasting by: Basu (VU2NSB)
  November 25, 2019, 01:58
  Radio propagation forecasting and assessment With the advancement in technology over the last few decades, we have made giant strides in Radio …
- Space Radio Propagation by: Basu (VU2NSB)
  December 4, 2019, 01:58
  An Introduction to Space Radio Propagation The propagation of radio waves for space radio communication primarily takes place by Direct wave (a…
Radio Rigs by: Basu (VU2NSB)
April 24, 2015, 17:03
What are Radio Rigs for Amateur Radio? Radio rig is a generic term used by an amateur operator for the radio station equipment. It includes no…
- Communication Receivers by: Basu (VU2NSB)
  May 8, 2015, 03:40
  No description found for this item.
- Radio Transmitters by: Basu (VU2NSB)
  May 8, 2015, 03:40
  No description found for this item.
- RF Power Amplifiers by: Basu (VU2NSB)
  May 8, 2015, 03:40
  No description found for this item.
- Transceiver Architecture by: Basu (VU2NSB)
  May 8, 2015, 03:40
  No description found for this item.
- Peripheral Equipment by: Basu (VU2NSB)
  May 8, 2015, 03:40
  No description found for this item.
- Power Supply Units by: Basu (VU2NSB)
  May 8, 2015, 03:40
  No description found for this item.
- Repeaters & Transponders by: Basu (VU2NSB)
  May 8, 2015, 03:40
  No description found for this item.
- Tuning and Operating Rigs by: Basu (VU2NSB)
  May 8, 2015, 03:45
  No description found for this item.
- SDR - Software Defined Radio by: Basu (VU2NSB)
  June 26, 2015, 02:33
  No description found for this item.
- DSP - Digital signal processing by: Basu (VU2NSB)
  June 26, 2015, 02:36
  No description found for this item.
- Home-brewing & Construction by: Basu (VU2NSB)
  June 26, 2015, 02:37
  No description found for this item.
RF Testing by: Basu (VU2NSB)
April 24, 2015, 17:07
Do we need T&M Equipment for RF Testing? Test and Measurement popularly called T&M which form the core of RF testing is perhaps a very …
- Fundamentals of Measurement by: Basu (VU2NSB)
  May 8, 2015, 04:16
  No description found for this item.
- Test & Measuring Instruments by: Basu (VU2NSB)
  May 8, 2015, 04:16
  No description found for this item.
- Radio Equipment Test Parameters by: Basu (VU2NSB)
  May 8, 2015, 04:16
  No description found for this item.
- RF Transmission Lines by: Basu (VU2NSB)
  May 8, 2015, 04:16
  No description found for this item.
- Radio Receiver Measurements by: Basu (VU2NSB)
  May 8, 2015, 04:16
  No description found for this item.
- Radio Transmitter Measurements by: Basu (VU2NSB)
  May 8, 2015, 04:16
  No description found for this item.
- Antenna System Measurements by: Basu (VU2NSB)
  May 8, 2015, 04:16
  No description found for this item.
HamSphere 4 by: Basu (VU2NSB)
April 25, 2015, 17:10
Real vs HamSphere Virtual vs Hybrid Radio communication and Amateur Radio as the terms suggest, clearly define the mode of communication usin…
- HamSphere 4.0 Architecture by: Basu (VU2NSB)
  May 8, 2015, 04:44
  No description found for this item.
- Modular Transceiver Design by: Basu (VU2NSB)
  May 8, 2015, 04:44
  No description found for this item.
- NEC Compliant Virtual antennas by: Basu (VU2NSB)
  May 8, 2015, 04:44
  No description found for this item.
- Logbook, eQSL and Award System by: Basu (VU2NSB)
  May 8, 2015, 04:44
  No description found for this item.
- Feature Updates & Events by: Basu (VU2NSB)
  June 27, 2015, 17:04
  No description found for this item.
- India DX Net - (on HamSphere) by: Basu (VU2NSB)
  May 14, 2015, 16:14
  No description found for this item.
CW & Digital by: Basu (VU2NSB)
April 25, 2015, 17:18
Fascinating world of CW, SSTV and Digital Radio Since the advent of radio communication in the late 19th century, it has made rapid progress in…
- CW Radiotelegraphy - A Robust mode by: Basu (VU2NSB)
  January 29, 2020, 05:28
  CW Radiotelegraphy - A disaster surviveable mode CW Radiotelegraphy is the oldest mode of radio communication and yet perhaps the most robust…
  - Learn CW Morse Code - Get Started by: Basu (VU2NSB)
    March 9, 2021, 20:31
    Learn CW Morse Code - Get Started If you are reading this article, then in all probability you either wish to learn CW Morse Code from the sc…
  - Learn CW Morse Code - Lesson Set 1 by: Basu (VU2NSB)
    March 13, 2021, 19:29
    Learn CW Morse Code - Lesson Set 1 This article on Learn CW Morse Code - Lesson Set 1 is the first in our series of lesson sets for beginners…
  - Learn CW Morse Code - Lesson Set 2 by: Basu (VU2NSB)
    March 14, 2021, 20:48
    Learn CW Morse Code - Lesson Set 2 This is Lesson Set -2 in our multi-part series of CW Morse Code hands-on tutorials where we will introduce…
- Slow Scan TV (SSTV) - How it works by: Basu (VU2NSB)
  February 5, 2020, 05:28
  Slow Scan TV (SSTV) - Analog and Digital Slow Scan Television or SSTV is essentially a derivative of the wideband broadcast television system…
- Digital Modulation Fundamentals by: Basu (VU2NSB)
  February 12, 2020, 05:28
  The fundamentals of Digital modulation for radio The 21st century has seen a major upsurge of digital modulation methods in radio communicati…
- Data & Text Mode digital Radio by: Basu (VU2NSB)
  February 24, 2020, 05:28
  Data & Text mode Digital Radio Communication Data and Text mode digital radio communication has matured over the decades and now forms an imp…
- Digital Radio - D-STAR DMR C4FM/YSF by: Basu (VU2NSB)
  May 8, 2015, 05:28
  No description found for this item.
- Spread Spectrum (DSSS & FHSS) by: Basu (VU2NSB)
  May 8, 2015, 05:28
  No description found for this item.
- FDMA, TDMA and CDMA Basics by: Basu (VU2NSB)
  May 8, 2015, 05:28
  No description found for this item.
Space Radio by: Basu (VU2NSB)
April 24, 2015, 17:31
What is Amateur Satellite Radio? Amateur satellite radio space communication is by-and-large related to conducting two way QSO between stations…
- Earth Satellite Orbits by: Basu (VU2NSB)
  December 8, 2019, 16:11
  The fundamental nature of Earth Satellite Orbits Satellites have been there enhancing radio communication for several decades. An understanding…
- Amateur Satellite Communications by: Basu (VU2NSB)
  December 18, 2019, 16:11
  Amateur Satellite Communications - An Introduction Amateur radio satellite communications present unique opportunities as well as challenges th…
- EME Moonbounce communication by: Basu (VU2NSB)
  January 21, 2020, 16:11
  EME Moonbounce Communication - Getting Started Earth-Moon-Earth EME Moonbounce communication is a very fascinating aspect of amateur radio. T…
World Order by: Basu (VU2NSB)
December 27, 2022, 20:46
World Order - The evolving economic trends The World Order is determined by sets of collectively agreed rules of engagement amongst nations…
- State of Western Economy by: Basu (VU2NSB)
  December 29, 2022, 20:51
  State of Western Economy Starting in the year 2020, the economies of the world came under pressure, especially the western economy. This wa…
- 5 Stages of Grief - Collapsing Hegemony by: Basu (VU2NSB)
  January 6, 2023, 17:15
  5 Stages of Grief - Collapsing Hegemony The 5 Stages of Grief that seems to be setting in with the gradual collapsing hegemony of the w…

Blog Posts

Category: Radio Communication (8)
Postings in this category cover various general aspects of Radio Communication theory, principles and techniques.
- EMI-RFI and Noise related HF Radio Station performance loss by: Basu (VU2NSB)
  January 25, 2022, 15:58
  EMI-RFI and Noise related HF Radio Station performance loss HF radio performance loss due to EMI-RFI and noise in and around the …
- Is FT8 popularity growing at the cost of SSB Phone and CW? by: Basu (VU2NSB)
  April 6, 2021, 21:15
  Is FT8 growing at the cost of SSB Phone and CW? This is a million-dollar question. The debate on whether FT8 popularity is growing at…
- Interpretation of S-Meter Noise Floor in HF Radio Receivers by: Basu (VU2NSB)
  March 29, 2021, 16:53
  S-meter Noise Floor in HF Radio Receivers In this article, I will focus on the interpretation (or perhaps misinterpretation) of the…
- 100W on a Wire Antenna - How far would it reach? by: Basu (VU2NSB)
  November 30, 2020, 02:08
  100W on a Wire Antenna - Is it good enough for DX? 100W on a Wire antenna! ... How far could it possibly reach? This is perhaps o…
- Watch Radio Modulation Depth for best Signal Clarity by: Basu (VU2NSB)
  May 25, 2020, 16:40
  Set Radio modulation Depth for optimum Clarity For the sake of optimum clarity and intelligibility of radio transmission, the radio…
- Why doesn't 59 Signal Report on Repeater make sense? by: Basu (VU2NSB)
  March 11, 2020, 16:26
  Does 59 Signal Report on a Repeater make any sense? Does a 59 Signal Report exchange during a QSO on a Repeater make sense? Unfortu…
- To invest in better Radio Rig or better Antenna by: Basu (VU2NSB)
  February 2, 2020, 03:31
  Choice between a better Radio or a better Antenna What should I focus on? Should I invest more in a better Radio Rig or a better Ante…
- Will High Gain HF Preamplifier help work Weak Signal DX? by: Basu (VU2NSB)
  January 22, 2020, 02:20
  High Gain HF Preamplifier for Weak Signal DX? Is it true that a high gain HF preamplifier will enhance the ability to work weak signal …
Category: Antennas and Arrays (6)
- Understanding Antennas - The Good, the Bad, and the Ugly by: Basu (VU2NSB)
  November 16, 2020, 16:56
  Understanding Antennas - What makes them good or Bad? Are some antennas good while some others are bad? Many people seem to think s…
- Why might Antenna Height matter more than Gain by: Basu (VU2NSB)
  July 9, 2020, 20:58
  Does antenna height matter more than gain? Though it may seem to be paradoxical at first sight, the fact is that very often the ant…
- How vital is Antenna Polarization in Radio Communication? by: Basu (VU2NSB)
  March 24, 2020, 17:44
  Antenna Polarization in Radio Communication What is the significance of antenna polarization in radio communication? Or, should we …
- Urban Antenna Height above ground - Facts & Myths by: Basu (VU2NSB)
  February 9, 2020, 19:57
  Urban antenna height above ground - The truth The antenna height above ground, especially in urban areas on the HF bands, poses a set…
- To invest in better Radio Rig or better Antenna by: Basu (VU2NSB)
  February 2, 2020, 03:31
  Choice between a better Radio or a better Antenna What should I focus on? Should I invest more in a better Radio Rig or a better Ante…
- Need We Fuss About Exact Antenna Bearing for HF DX? by: Basu (VU2NSB)
  December 10, 2019, 16:09
  Do we need to set eaxct antenna bearing for HF DX? While working distant stations on HF bands do we need to be fussy about the exact …
Category: Radio Wave Propagation (10)
- Low SSN - Why do most Hams find HF Radio so difficult? by: Basu (VU2NSB)
  January 14, 2022, 16:41
  HF Radio communication so difficulties during Low SSN It is true that most ham radio operators around the world in their quest …
- How badly can high Local Ambient QRM affect HF Radio? by: Basu (VU2NSB)
  March 22, 2021, 22:01
  Effects of Local Ambient QRM on HF Radio Local ambient QRM (Noise) from various electrical appliances and other sources in the neig…
- Impact of VHF-UHF Radio Repeater Site Location on Coverage by: Basu (VU2NSB)
  September 4, 2020, 17:25
  VHF-UHF Radio Repeater Site Location vs Coverage The significance of VHF-UHF radio repeaters' site location for achieving the desir…
- Global HF Radio Propagation Openings - The Summer of 20 by: Basu (VU2NSB)
  May 15, 2020, 01:12
  HF Radio Propagation Outlook - The Summer of 2020 In the Summer of 2020, the HF Radio Propagation openings are not so frequent as one…
- A Typical 40m HF Band Opening - A Graphical Rendition by: Basu (VU2NSB)
  May 10, 2020, 18:06
  40m HF band opening - Animated view Here is an animated graphical rendition of a typical 40m HF band opening transition scenario that…
- How vital is Antenna Polarization in Radio Communication? by: Basu (VU2NSB)
  March 24, 2020, 17:44
  Antenna Polarization in Radio Communication What is the significance of antenna polarization in radio communication? Or, should we …
- Challenges of working HF DX near Antipodes by: Basu (VU2NSB)
  December 30, 2019, 02:05
  Working HF DX stations located near Antipodes Working HF DX at the longest possible physical distance on earth is often referred to a…
- HF Long Path (LP) - Quick tips and pointers by: Basu (VU2NSB)
  December 23, 2019, 03:20
  HF Long Path (LP) - Getting acquainted HF radio DXing may often be leveraged by the use of HF Long Path (LP) from time to time. By and …
- Are HF Bands Really Dead during Low SSN at Solar Cycle Minima? by: Basu (VU2NSB)
  November 29, 2019, 03:37
  Low SSN Solar Cycle minima - HF bands dead? Too often we hear amateur radio operators complain about HF bands being dead during the low…
- Skip Zone - HF by: Basu (VU2NSB)
  October 3, 2019, 04:50
  Beware of Skip Zone while working HF radio A good radio amateur friend of mine from Poland sounded quite anxious when he told me that his…
Category: CW and Digi-modes (2)
- Do Digital Modes like FT8 work Below Noise? by: Basu (VU2NSB)
  December 26, 2019, 18:41
  Digital modes like FT8 work below Noise? - A myth It is a common myth that narrowband digital modes like FT8, JT65, etc establish commu…
- PSK31 - A Robust QSO by: Basu (VU2NSB)
  October 4, 2019, 06:21
  PSK31 - for exciting HF band QRP PSK31 like most of the other narrow-band digital text communication modes requires very little TX power …
Category: Space Communication (1)
- How to get started on ISS Cross band Repeater? by: Basu (VU2NSB)
  October 23, 2020, 21:02
  Getting started on ISS Cross band Repeater The new version of the ISS Cross Band Repeater had been activated on 2nd September 2020 …
Category: RF Transmission Lines (2)
- Will low SWR always ensure a good Antenna setup? by: Basu (VU2NSB)
  February 28, 2020, 02:30
  Does Low SWR always mean a good Antenna setup? Many amateur radio operators often assume it to be true but the question is, will lo…
- Does Coaxial Cable Choke at Antenna cut RF Noise? by: Basu (VU2NSB)
  February 16, 2020, 17:14
  Coaxial cable choke and RF common-mode noise Is it really true that a section of coiled coaxial cable choke at antenna feed-point wou…

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