Author: Doug

What is a Monochromator

On the local amateur radio reflector recently there was an interesting discussion about a Monochromator which was being sold at the local auction place. I spent a bit of time working as a Technical Officer in the Chemistry…

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Why being non Vendor focused is important

I am reminded of a story from my youth that helped me to learn the importance of not being vendor focused. Sadly this lesson was learnt while working as a technician in an environment where I was expected…

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Should You Use Off-Brand Batteries in Two-Way Radios?

I recently read an article on the web that attempted to discuss whether or not you should use ‘off brand’ batteries in handheld devices. It resoundingly said ‘no’. The single argument that it provided was that the radio…

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Spectral purity of Baofeng radios

One topic that is fascinating to watch rolling round on Facebook is the reactions of the crowd who hate the inexpensively made Baofeng radios. People talk about how you will set off all the repeaters in range on…

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Looking at the Heathkit HD-1416 Code Practice Oscillator

Today my Heathkit Code Practice Oscillator arrived. I was lucky enough to pick it up on eBay for a song, but the shipping took forever. Anyway, it’s a beautifully constructed unit, built from a multivibrator circuit, based around…

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Interconnectivity where it is not expected

I was actively involved in packet radio here in Canberra in the 80’s and 90’s. Great stuff, and a ton of fun. We had a core group of probably 10 -15 people here who were active. I did…

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Evolution of a simple PCB for Eurorack power control

As it would turn out, Amateur radio is a hobby pursued by many people who are interested in Electronics. I have always had a fascination for all things electrical in nature, and have spent my whole life making gadgets.

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The 122G Project

(The cover photo for the project is Andrews dish (VK3CV/WQ1S) from the DUBUS article.) I encountered a fascinating project by a group of Amateur Operators, where they are re purposing a radar module made by a German company,…

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Racal Matel 2c800 Field Phone

So, I was browsing the Internets a while ago, continuing my search for interesting ex military radio gear, and I encountered these awesome Racal Matel Field Phones. There were a couple of people selling them, so I picked…

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Tuggeranong Hill Activation

Today, I activated Tuggeranong Hill (VK1/AC-038) again. Unfortunately, I was late leaving home, and the walk up took *much* longer than I expected, likely because of the staying inside with Covid (That’s my story, and I am sticking…

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