The Joy Of Building Kits

Posted on September 17, 2020 at 11:55 am in

I managed to get my hands on a few of the latest (2020) QCX Plus kits from QRP-Labs and as usual I had no difficulty finding homes for the extra kits, obviously keeping one for myself to build in the wee hours of the morning when it is quieter. It was – as always –…

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LED Lamp Behaviour

Posted on April 11, 2018 at 2:06 pm in

So I got my hands on some of these 12 volt LED lamps (chips / modules / lights / whatever) and since I had enough to burn one or two “by accident” I thought I should spend a few minutes to get to know them better. I’m not referring to your regular little round 1.2…

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Replacing the BS170 in an Ultimate3S Beacon

Posted on March 19, 2018 at 1:48 pm in

After the weather zapped the output transistor (a BS150 FET) of my Ultimate3S beacon from QRP-Labs yet again, I was forced to replace the device, again. It is not a difficult job at all, just a little chore. This time I decided to make it easier on myself. Instead of replacing the transistor by soldering…

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Making (Big) Waves

Posted on March 15, 2018 at 11:41 am in

The Yaesu FL-2100Z is a classic HF amplifier. It sits near the end of a long life line of multiple variations and models of the basic 811A or 572B triode valve, all using exactly the same grounded-grid core design, and all of them making nice big waves in the ether when fired up. I was…

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The QCX – a Nifty Little Gadget

Posted on March 5, 2018 at 10:40 am in

So yesterday (it was a Sunday) I had a lot to do, but nothing more important than to cut open the wrappings of the 20m QCX kit that I purchased from QRP-Labs a few months ago. Yes, it was still lying in its protective wrappings after all this time. Work is seriously interfering with my…

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Argentine balloon to fly to South Africa and beyond

Posted on April 7, 2017 at 9:25 pm in

Argentine balloon to fly to South Africa and beyond

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Sizing of a Solar Charging System for a QRP Beacon

Posted on April 7, 2017 at 9:18 pm in

When you run a small low power beacon like the Ultimate3S from QRP-Labs it is attractive to consider powering it from batteries with a solar panel. But how long will it last? A number of things are conspiring to make our lives as amateur radio experimenters difficult. On the one hand the cheap Chinese imports…

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Beaconing Five Modes in Twenty Minutes

Posted on April 7, 2017 at 9:10 pm in
Argo SlowHell callsign

While WSPR’ing across multiple bands (“band hopping”) has been done before, I thought it might be interesting to do five different modes on the same band. It was easier done than said! I was sitting with a customer’s QRP-Labs Ultimate3S beacon on my bench, all built up and ready to test. It was a single…

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No Sound from my SDR

Posted on April 15, 2016 at 8:39 am in

And in other news, I’m trying to play with this cute little SDR receiver (the cuteness which I am sharing with you in another post), but I’m having mega problems. Don’t get me wrong: The issue is not SDR or this cute little Rx. I own and operate a Flex-1500 which has quietly become my…

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Measuring the QRPp’s Isn’t Easy

Posted on February 9, 2016 at 9:32 am in

Interesting how a development in one area of this hobby can force a sudden change of direction to explore some new areas. I’ve been happily experimenting with my Hans Summers Ultimate 3S kit when I realised that I could band-hop and get a picture of propagation conditions updated every 30 minutes or so. Cool idea.…

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