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    Harry Zachrisson
    • Jan 2
    • 1 min

    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...
    457 views2 comments
    New features in firmware and Software version 1.10
    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...
    916 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...
    494 views0 comments
    New WSPR TX Desktop model. 80To10
    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...
    715 views10 comments
    New firmware supports long Maidenhead position reports
    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...
    1,073 views0 comments
    WSPR Receivers redesigned and soon available.
    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...
    1,486 views5 comments
    I measured the Noise Figure of the LNB in the PARI-O and made a video of it.
    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...
    492 views0 comments
    Geo-fence for the WSRP Pico
    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...
    808 views22 comments
    Nice Video and paper on 40m band propagation using WSPR.
    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...
    713 views0 comments
    New Product. High stability 10GHz LNB
    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...
    431 views0 comments
    A new WSPR transmitter for Balloons
    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...
    2,882 views1 comment
    Improvements in version 0.82 of the configuration software.
    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...
    548 views8 comments
    Using the earth as an antenna? F5VLB Earth Probe testing.
    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...
    1,293 views0 comments
    User story from WM3E.
    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...
    195 views1 comment
    Video review of the WSPR Desktop transmitter
    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...
    507 views1 comment
    Oscar 100 satellite receiver on-line now
    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...
    604 views2 comments
    Sunday repair - Broken knob on brand new FT-857D Transceiver.
    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...
    339 views1 comment
    ZachTek one year old, lets celebrate!
    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...
    120 views1 comment
    New revision of WSPR Desktop transmitter
    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...
    846 views17 comments
    WSPR Desktop Transmitter in Tanzania
    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 ...
    635 views0 comments
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