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This website is a collection of articles related to my pursuit of the hobby of Amateur Radio. December 2007 was the busiest recent month with 37,000 page requests. Click for activity info.
Amateur Radio is defined in the International Telecommunications Union (ITU) Radio Regulations (RR) Article 1:
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1.56 Amateur service: A radiocommunication service for the purpose of self-training, intercommunication and technical investigations carried out by amateurs, that is, by duly authorised persons interested in radio technique solely with a personal aim and without pecuniary interest. |
Last changed: 26 April 2008, most articles have direct links on this page. Additionally, you may find articles of interest using the site SEARCH facility, but it takes Google a little time to index updated or new content.
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As a result of Antennax's action to restrict access to cebik.com, articles on this site have been revised to comply with a policy of linking only to open access sites, and regrettably, links to cebik.com removed 24 April 2008. It is very sad that LB Cebik's passing is marked by Antennax's action.
The Discrete Fourier Transform from a power perspective
Roger Beep - tone waveform development
Ameritron AL811H tube selection
RF Power Amplifier Tube Performance Computer
Field Strength Calculator (FSC)
A model of a Guanella 1:1 choke balun using a Jaycar LO1238 core
A model of a Guanella 1:1 choke balun using two Jaycar LF1260 cores
RF Two Wire Transmission Line Loss Calculator
A model of a practical Guanella 1:1 balunA model of the W2DU 1:1 choke balun
A model of the W2DU 1:1 choke balun using Jaycar LF1258 cores
A model of the W2DU 1:1 choke balun using Jaycar LF1260 cores
Icom - 9350 Protocol Converter (ic9350) ***DRAFT***
QSO - VK1BL/P and VK2FZ on 13cm on 25/11/2007
RG-6/U for transmitting applications
Plotting antenna pattern from Sun noise
Accuracy of narrowband audio noise measurements with a digital multimeter
Noise measurement uncertainty calculator
Headroom in white noise measurements
Quiet sun radio flux interpolations
Noise Figure Meter (NFM) software
A trapped dipole for 80m and 40m using bootstrap coax traps
Estimating threshold receive power level for WSJT JT65B/KV ***DRAFT***
Noise and receivers ***DRAFT***
Antenna wire catenary calculator ***DRAFT***
VSWR FAQ ***DRAFT***
Australian amateur population trends 1998 - 2007
Current projects
 | USB CI-V interface with virtual com port interface, and true open collector CI-V bus. |
| more on "realisable sensitivity", some tests of VHF FM mobiles; |
| NEC exploration of gamma matching on antenna balance; |
| Noise generator for receiver testing. |
| AH4-AT300 Protocol Converter *** coding in progress, but waiting on time *** |
Theme pages
Noise, LNA, Preamplifier, G/T, Receiver Performance
Broadband over Power Lines (BPL, PLC, PLT)
(NFM) Noise Figure MeterCalculators
Quiet sun radio flux interpolations
Noise measurement uncertainty calculator
Quiet sun radio flux interpolations
Antenna wire catenary calculator
Field strength / receive power converter
Receiver sensitivity metric converter
Noise Figure Y factor method calculator
BPL interference evaluation tool
RF Transmission Line Loss Calculator / Enhanced
RF Two Wire Transmission Line Loss Calculator
EMR MPE standards compliance evaluation tool
Calculator to support Manual Testing of Field-Strength Levels Using Conventional ReceiversAntenna Factor of short tuned vertical with concentrated loading
Projects
12V DC distribution in car for radio applications - 2005
Peak amplifier for an RF wattmeter
Peak amplifier for Drake W4 directional wattmeter
EA 1978 Accu-keyer improvements
Refurbishing a Hy-gain 2meter 14 element beam (214, VB-214)
FSM (Field Strength Meter) software
FSM case study - Broadband interference on 40m
Small un-tuned single turn square loop for field strength measurements.
Sound card microphone preamplifier
TuneMate for Icom transceivers
An antenna for 7MHz local contacts
High Pass speaker filter for CTCSS suppression
Novel Gamma Match Construction
GPIB to Centronics Protocol Converter
Antenna mast for experimental use
VK1CAE Experimental FlexDigi Node
Silicon Chip Automotive Ammeter (June 2002) - mods
An RF choke for a telephone line
Articles
Measuring SSB transmitter power
Small single turn un-tuned shielded loop
144MHz low noise amplifier performance in the real world
Double Bazooka Antenna performance
An unloaded elevated vertical as a multi-band HF antenna
Uncertainty of the noise sampling process
Field strength measurement - Buddipole and FSM
Observations of ambient noise / emissions at Jerrabomberra - April 2007
The Force12 FP-40C under the microscope
Estimating Antenna Factor for a MobileOne M40 helical whip
FSM case study - Ambient Noise Survey on 40m
Small single turn un-tuned shielded loop
Bootstrap coax traps for antennas
Noise Figure inferences of spectrum analysis of weak signals
Small square un-tuned loop for field strength measurement - NEC models
Exploration of options for 144MHz SSB station at VK1OD
IC-7000 evaluationAccuracy of the FSM sampling process on noise
DL6WU Long boom Yagi design tool
NEC model of the Cobra antenna
Sufficient sag for wire antenna spans for wind survival
A review of "The Lure of Ladder Line"
An unloaded vertical as a multi-band HF antenna
Serious hazard of common 6 pin DC power connector on ham transceivers
Effective use of a Low Noise Amplifier on VHF/UHF
Expected ambient noise levelAntenna Factor of short tuned vertical with concentrated loading
AFSK - effect of overload of tx audio input
The importance (or not) of being resonant
Australian amateur population trends 1998 - 2006
Total Harmonic Distortion of a square wave
Anderson Power Poles for 12VDC radio applications
Are you ready for BPL enablement of your home and neighbourhood?
***DRAFT*** Matching a quarter wave vertical using TL elements
Setup of FM tx for broadcast relay from digital audio source
Amateur Radio application of Frequency Modulation
Using audio spectrum analysis for end to end linearity testing of an SSB transmitter - receiver
Antenna Tuner Calibration Chart
Fitting a HAPN 4800 board to a Paccomm Tiny 2 Mk II
Linked repeaters - siqnal quality
Reports
Analysis of ACA report on the Queanbeyan BPL Trial (Nov-Mar 2005)
Analysis of ACA report on the Moruya BPL Trial (Oct-Dec 2004)
Queanbeyan BPL trial revisited - 26 March 2005
Observations of the Queanbeyan BPL Trial - Nov 2004
Other
VK1ZKD (Karen's call sign, now expired)
A quotation from Lord Kelvin:
| "When you can measure what you are speaking about, and express it in numbers, you know something about it. But when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind. It may be the beginning of knowledge but you have scarcely in your thoughts advanced to the state of science." |
Last update: 26 April 2008 18:56
