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, 20206 min read
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...
5,299 views1 comment
Harry Zachrisson
Jan 8, 20203 min read
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...
631 views8 comments
Harry Zachrisson
Dec 2, 20193 min read
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...
2,197 views0 comments
Harry Zachrisson
Nov 24, 20191 min read
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...
794 views1 comment
Harry Zachrisson
Nov 4, 20195 min read
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...
556 views1 comment
Harry Zachrisson
Oct 27, 20192 min read
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...
1,122 views17 comments
Harry Zachrisson
Oct 4, 20193 min read
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 ...
919 views0 comments
Harry Zachrisson
Aug 13, 20191 min read
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...
264 views0 comments
Harry Zachrisson
Jul 4, 20199 min read
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...
1,025 views1 comment
Harry Zachrisson
Apr 9, 20192 min read
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...
934 views2 comments
Harry Zachrisson
Mar 16, 20192 min read
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...
281 views0 comments
Harry Zachrisson
Feb 17, 20192 min read
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,...
303 views0 comments
Harry Zachrisson
Jan 16, 20193 min read
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...
416 views0 comments
Harry Zachrisson
Nov 8, 20182 min read
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...
1,399 views0 comments
Harry Zachrisson
Oct 22, 20183 min read
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...
478 views0 comments
Harry Zachrisson
Oct 22, 20181 min read
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:...
388 views0 comments
Harry Zachrisson
Oct 22, 20182 min read
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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