Version 1.10 brings a couple of new features to my WSPR transmitters. Prefix or Suffix to the Call Sign. The user can now chose to use...

Firmware 1.2 is now released and fixes two bugs: The feature "Send precise location" only worked properly if you call sign was six...

I have just released a new Desktop model that covers all bands from 80m to 10m. This means it covers nearly all the bands that the...

I just released Firmware 1.0 and PC configuration software 1.0 that is suitable for all WSPR transmitter models. Besides being the first...

My direct conversion receivers for WSPR was one of the first products I made and sold two years ago when I started ZachTek. It was a...

I have been curious of what the noise figure on the Golden Media GM-201 LNB is. GM-201 is the LNB that is included as part of my PARI-O...

In the latest firmware (0.92) I have implemented geofencing that will avoid transmission when a Pico transmitter and it's balloon is over...

Hi. Jim -KX4TD - have used a WSPR Desktop transmitter to investigate the propagation on the 40m band. His explanation on what is going...

I have just released my new product, the High stability 10GHz LNB (PARI-O) This product solves the problem of drift in 10GHz LNBs and...

After a long development time I have now released my latest WSPR transmitter that is intended to be flown with small balloons. There is a...

This Christmas holiday I took a break from building and designing electronics. Although I was suffering a bit from burn-out from working...

Jean-Marie Polard - F5VLB has been experimenting with so called "earth probes" to transmit RF on our amateur bands. He mentioned it to me...

Carl - WM3E have done a nice write up of how he travels the US in his motor home with his wife. Like so many of us that comes in and out...

One of my Customers -Rob Wagner VK3BVW - have done a Video review of my WSPR Desktop product. Watch it here https://youtu.be/AXmzQP0VwZ4...

You can now listen to the geostationary radio amateur satellite Oscar 100 from a web browser. The receiver is using my latest product...

My FT-857 developed a fault the other month, it does not give any power out on transmit on SBB and AM, FM works fine though so the PA is...

It is now one year since I started my ZachTek venture, I cant believe how fast the time have gone! Time flies when you are having fun as...

I have just finished a new revision of the WSPR Desktop. The new revision use a different GPS module as I had beginning to experience...

One of the WSPR Desktop transmitters have found its way to East Africa running continuously as a WSPR beacon in Tanzania. André ...

Hayden - VK7HH have built a 6m WSPR beacon using a WSPR TX_LP1 and have done a really good job putting it together in a high power...