VK4ADC's Web

About this site

This web site seems to be consistently under attack by hackers, a recent attack was successful and the site went down to be replaced by a (faulty) link to https://ushort.today/....  Well it is back to normal for now. Given that only useful data is on the site - no users data etc.. - and the only admin user and password details are unique, there is nothing to be gained by hacking.   However, if it continues at the current rate then the only availability of these same documents and images will be from a way-back machine (maybe) as this domain will disappear.   VK4ADC@31 January 2026

Well this hacking has happened too many times now so this site should still have the same info available but has been transformed from a dynamic to a static format site. No PHP, just straight HTML pages.  Hack that !!!
Any previous search engine links will now be invalid and remain so until the spiders re-find the new structure.  Not my fault, blame the hackers...   VK4ADC @11Feb26

SOME ARTICLES ARE KNOWN TO BE MISSING, ALL DATA FILES (PDF & ZIP) HAVE BEEN RE-LOADED BUT LINKS TO THEM MAY BE MISSING. 22 Aug 2025

Doug VK4ADC

Bathurst 1000 Oct 2023

"VHF tower" : lower yagi boom 144 MHz, grid pack for 2.4/3.4(5.7/10 ?) GHz.
End mounted 23CM yagi, 432MHz yagi on the top.
Centre of the second "ray dipole" off outrigger arm just below rotator for 3.5/7/10/14 MHz 
circa Aug 2024 

"HF tower" : lower yagi boom 14/18/21/24/28 MHz, upper boom 50 MHz.
Icom discone 25-1300MHz on the top, 146MHz vertical dipole off the side.
Centre of the first "ray dipole" off outrigger arm just below rotator for 1.8/3.5/7/10 MHz
circa Aug 2024 

Amateur radio VK4ADC - an Australian amateur radio web site with general/technical references of interest to those who want to discover more about Amateur Radio.   

The "original VK4ADC web site" was effectively lost on 29 December 2023 due to a web server change resulting in the Joomla Content Management System (CMS) failing to run at all on a new/replacement server - all necessaary due to the previous hosting server suffering a software failure.

Most of the original pages have been saved as individual PDFs available for download from Updated content/PDF Links, some of my project executables are available separately as ZIP files from Updated ZIPs links

The previous site will never be totally rebuilt, some 150-odd articles are involved. Only any new project (or selected newish and active) pages will be made available off the menu into the future.

This web site is mainly about my technical and software projects, operating information, field day reports, etc..... that have occurred over some 15 years.  My approach on the subjects varies from a how-to-build-it style of step-by-step instructions to a more blog-style report on how a project progressed through from concept to conclusion. 
Please note that I do NOT supply PCBs, short form kits or built-up versions of my projects, PCB layout files, project source code or Picaxe codes... This is an IDEAS site where I have had an idea - and implemented it - and (generally) enough guidance is given for others to emulate the process.
For those of you who have worked me, I no longer seek or send paper QSL cards. I have accumulated a LOT over the last 50+ years and need no more. I generally upload the log to eQSL as contacts are made, particularly on the digital modes, but upload to LOTW only a couple of times a year.
As of mid-June 2025, there is no continuing software support available for any of my software projects - utilities etc.. 
There will not be any updates so any 'bugs' will remain. What they do/are is what they will always do/are.
It is not I am no longer coding but simply that any future changes will be reserved for in-house use and I may/will not respond to 'bug requests'....
The aim of these web pages is to provide insight into how a hobbyist can experiment in various facets of amateur radio, the processes involved in creating electronic projects, and allow others to generally learn through my experiences. Please note that formulae are not necessarily provided, nor are in-depth explanations of electronic theory given as to how my many projects function. 
I am always working on one project (or another) so new web pages will occasionally appear on the site, or revisions of existing pages will occur, so call back as often as you like to see what has changed or is new.
New info 28 March 2025 :
I ran the Australian Ham Radio Discussion Forum { aka AHRDF } for about 8-9 years but ceased that activity in November 2024 and set it so that it was purely an archive for all posts and data saved to that point..

Note that it is and will stay an archive, no new posts, logins or messaging supported.

My background, in brief, is that I was trained as a radio technician in air-ground & HF radiocommunications and followed that up with continued work in the technical arena over many years.  That has given me a fairly broad experience and knowledge base in matters electronics, communications and computing.

 I don't claim to have all of the answers - but I usually have the drive, experience and vision to create successful outcomes in my projects and other technical activities. 

I hope you enjoy visiting and exploring my web site.

73' Doug Hunter VK4ADC

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