Video on remote hilltop 6m WSPR installation.
Hayden Honeywood - VK7HH starts of 2022 with a video showing of his remote installation site and the ZachTek WSPR transmitters that is...
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Harry Zachrisson
- Sep 15, 2021
- 2 min
New features in firmware and Software version 1.10
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...
1,179 views17 comments
Harry Zachrisson
- Aug 14, 2021
- 1 min
Firmware 1.2 fixes bugs related to short call signs
Firmware 1.2 is now released and fixes two bugs: The feature "Send precise location" only worked properly if you call sign was six...
680 views0 comments
Harry Zachrisson
- Jun 25, 2021
- 1 min
New WSPR TX Desktop model. 80To10
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...
939 views10 comments
Harry Zachrisson
- May 16, 2021
- 2 min
New firmware supports long Maidenhead position reports
I just released Firmware 1.0 and PC configuration software 1.0 that is suitable for all WSPR transmitter models. Besides being the first...
1,140 views0 comments
Harry Zachrisson
- Oct 12, 2020
- 3 min
WSPR Receivers redesigned and soon available.
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...
1,589 views5 comments
Harry Zachrisson
- Aug 17, 2020
- 1 min
I measured the Noise Figure of the LNB in the PARI-O and made a video of it.
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...
534 views0 comments
Harry Zachrisson
- Aug 14, 2020
- 1 min
Geo-fence for the WSRP Pico
In the latest firmware (0.92) I have implemented geofencing that will avoid transmission when a Pico transmitter and it's balloon is over...
885 views22 comments
Harry Zachrisson
- Apr 29, 2020
- 1 min
Nice Video and paper on 40m band propagation using WSPR.
Hi. Jim -KX4TD - have used a WSPR Desktop transmitter to investigate the propagation on the 40m band. His explanation on what is going...
788 views0 comments
Harry Zachrisson
- Apr 3, 2020
- 2 min
New Product. High stability 10GHz LNB
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...
461 views0 comments
Harry Zachrisson
- Feb 1, 2020
- 6 min
A new WSPR transmitter for Balloons
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...
3,250 views1 comment
Harry Zachrisson
- Jan 8, 2020
- 3 min
Improvements in version 0.82 of the configuration software.
This Christmas holiday I took a break from building and designing electronics. Although I was suffering a bit from burn-out from working...
575 views8 comments
Harry Zachrisson
- Dec 2, 2019
- 3 min
Using the earth as an antenna? F5VLB Earth Probe testing.
Jean-Marie Polard - F5VLB has been experimenting with so called "earth probes" to transmit RF on our amateur bands. He mentioned it to me...
1,514 views0 comments
Harry Zachrisson
- Dec 2, 2019
- 2 min
User story from WM3E.
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...
224 views1 comment
Harry Zachrisson
- Nov 24, 2019
- 1 min
Video review of the WSPR Desktop transmitter
One of my Customers -Rob Wagner VK3BVW - have done a Video review of my WSPR Desktop product. Watch it here https://youtu.be/AXmzQP0VwZ4...
593 views1 comment
Harry Zachrisson
- Nov 22, 2019
- 1 min
Oscar 100 satellite receiver on-line now
You can now listen to the geostationary radio amateur satellite Oscar 100 from a web browser. The receiver is using my latest product...
670 views2 comments
Harry Zachrisson
- Nov 4, 2019
- 5 min
Sunday repair - Broken knob on brand new FT-857D Transceiver.
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...
397 views1 comment
Harry Zachrisson
- Oct 27, 2019
- 1 min
ZachTek one year old, lets celebrate!
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...
124 views1 comment
Harry Zachrisson
- Oct 27, 2019
- 2 min
New revision of WSPR Desktop transmitter
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...
899 views17 comments
Harry Zachrisson
- Oct 4, 2019
- 3 min
WSPR Desktop Transmitter in Tanzania
One of the WSPR Desktop transmitters have found its way to East Africa running continuously as a WSPR beacon in Tanzania. André ...
681 views0 comments