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...
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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...
4,063 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...
590 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...
1,700 views0 comments
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...
642 views1 comment
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...
440 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...
921 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 ...
707 views0 comments
Harry Zachrisson
- Aug 13, 2019
- 1 min
YouTube video. WSPR on 6m by Hayden - VK7HH
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...
214 views0 comments
Harry Zachrisson
- Jul 3, 2019
- 9 min
Polar Research vessel Oden gets a ZachTek WSPR transmitter.
WSPR is a great way to explore and test a wide range of stuff in our wonderful radio hobby. Although I guess most of us use WSPR casually...
913 views1 comment
Harry Zachrisson
- Apr 9, 2019
- 2 min
WSPR Mini - the new small WSPR transmitter that can run from a LiPo battery.
I have now completed construction, testing and build of my latest WSPR Transmitter. I call it the WSPR Mini! It is only 41x56mm in size...
851 views2 comments
Harry Zachrisson
- Mar 16, 2019
- 2 min
Video on the WSPR-TX_LP1 with the Mezzanine LP4 add-on card.
YouTuber Kevin Loughin did a great review of the WSPR-TX-LP1 transmitter with the add-on card Mezaninne LP4. As Kevin is a Linux only...
259 views0 comments
Harry Zachrisson
- Feb 17, 2019
- 2 min
Discussion Forum and other news.
Hi all. Forums! I now have a Forum for discussions and support. You need to login to members page to access it. It is open for everyone,...
244 views0 comments
Harry Zachrisson
- Jan 16, 2019
- 3 min
Add-on for the WSPR-TX_LP1 giving it four switched lowpass filters
The Mezzanine LP4 is a new add-on that expands the WSPR-TX_LP1 transmitter to four bands or more (US users can use more bands with...
397 views0 comments
Harry Zachrisson
- Nov 8, 2018
- 2 min
New WSPR Transmitter product
I just released my latest WSPR product. It has been a very long journey to complete this one but it is finally here. The Product is...
1,354 views0 comments
Harry Zachrisson
- Oct 22, 2018
- 3 min
VK3KHZ modifes the WSPR-TX_LP1 to dual band transmitter.
Paul Karlstrand with radio amateur call sign VK3KHZ in Australia was one of my early customers of the WSPR-TX_LP1 transmitter. He...
416 views0 comments
Harry Zachrisson
- Oct 22, 2018
- 1 min
Video review of the WSPR-TX_LP1 transmitter by VK3YE
Peter Parker (Amateur call sign VK3EY) in Australia tested my newly released WSPR transmitter. Check out his review here:...
351 views0 comments
Harry Zachrisson
- Oct 22, 2018
- 2 min
Documentation page for the WSPR-TX_LP1
I have written a documentation page for the WSPR Transmitter WSPR-TX_LP1 and and tried to make it as complete as can be at this time. ...
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