Step attenuator kit

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The 30dB step attenuator, in a nice case.

I’m the proud owner of a MiniVNA for quite a few years already. One of its features is that you can use it as an RF signal generator. However, the output power cannot be adjusted, so I needed an attenuator. I could build one myself of course, but for about the same amount of money you can buy a kit at the dutch web shop of Kent Electronics. I never tried their kits before, so I decided to give it a try. — more →

Altoids L-tuner

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My Altoids L Tuner

A while ago Tjeerd PA3GNZ donated me some Barkleys mint tins (identical to the famous Altoids tins), which are rather popular by QRP builders to house small homebrew stuff. Two weeks later I found a czech webshop, offering a kit called “Altoids L-tuner”. This kit perfectly fits in such a tin. Since this tuner would be a perfect add-on for my 30m QRP transceiver, I immediately ordered it. — more →

ATV transmitter for 23cm

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Front view of my fully assembled 23cm ATV transmitter.

Although I was already able to receive the local ATV repeater PI6ATV, it has been a wish for about 8 years to be able to uplink too. So I once bought a couple of modules from PE1ACB that would allow me to do so. However, due to lack of time and other priorities the modules lost my attention and ended up on some shelf. Since I started my new job I have more spare time, which I spend (among other things) on this fantastic hamradio hobby. So then I remembered those modules. I designed a front panel and bought a case, switches and connectors. — more →

A very small active antenna

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The kit contents: extensive documentation, a professional circuit board, and all necessary components.

Small active antennas like the “mini-whip” (by PA0RDT) are very popular at the moment. They provide good reception of signals from HF all the way down to the VLF band. Here in the Netherlands Van Dijken Elektronica sells a nice kit for this antenna, and since Adrian PA0RDA was interested in this antenna, I ordered this kit and built it. — more →

TNC-X

Introduction

All you need to use email, without having a local internet connection: laptop with Winlink installed, TRX (with antenna) and TNC-X.

All you need to use email, without having a local internet connection: laptop with Winlink installed, TRX (with antenna) and TNC-X.

The Dutch Amateur Radio Emergency Service (DARES) is currently setting up a messaging system for emergency communications. Email is sent over radio using the good old AX.25 protocol. Part of this project is the TNC-X, a simple packet radio modem with a USB interface. I am trying to get rid of those RS-232 boxes, so having a TNC with a USB interface is one more step in that direction. Hans PA3GJM managed to get lots of radio amateurs together to buy 100 TNC-X modems. I was one of them.

More info on the TNC-X can be found on this website: www.tnc-x.com. — more →