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      Assembling Henrik's RF bridge

      pubsub.slavino.sk / avian_blog · Sunday, 15 November, 2020 - 09:54

    Some comments on how my soldering of the RF bridge board went and thoughts on future improvements.

    Značky: #Elektro, #Analog

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      NanoVNA-H output signal level

      pubsub.slavino.sk / avian_blog · Wednesday, 11 November, 2020 - 18:13

    The NanoVNA I have performs measurements at a much higher signal level than what is stated in the User Guide.

    Značky: #Elektro, #Analog

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      S21 curves for SMD resistors

      pubsub.slavino.sk / avian_blog · Monday, 9 November, 2020 - 19:19

    Some comments on a figure that appears in W0QE's video on VNA calibration loads.

    Značky: #Elektro, #Analog

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      Notes on Henrik Forstén's RF bridge

      pubsub.slavino.sk / avian_blog · Friday, 6 November, 2020 - 18:03

    Some of my notes on the coupler design while making my own copy based on the published Gerber files.

    Značky: #Analog, #Elektro

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      Vector measurements with the rtl-sdr, 7

      pubsub.slavino.sk / avian_blog · Friday, 16 October, 2020 - 16:44

    I measured the VSWR of some compact LTE antennas with my rtl-sdr-based setup and compared the results with those from NanoVNA-H.

    Značky: #Elektro, #Analog

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      Vector measurements with the rtl-sdr, 6

      pubsub.slavino.sk / avian_blog · Tuesday, 6 October, 2020 - 17:58

    I did some more measurements to try to find out why my measured signal level from the multiplex board varies a lot with frequency.

    Značky: #Elektro, #Analog

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      Transmission line mismatched on both ends

      pubsub.slavino.sk / avian_blog · Monday, 14 September, 2020 - 18:30

    A short summary on the behavior of a transmission line connected to an mismatched signal source and an mismatched load.

    Značky: #Analog, #Elektro

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      P57 feed-through terminator

      pubsub.slavino.sk / avian_blog · Wednesday, 26 August, 2020 - 15:57

    I did a quick test of a cheap BNC 50 Ω load and found it satisfactory for my needs.

    Značky: #Elektro, #Analog

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      Vector measurements with the rtl-sdr, 5

      pubsub.slavino.sk / avian_blog · Tuesday, 18 August, 2020 - 16:01

    Using my new time multiplex board I've successfully measured the time delay in a few different lengths of coaxial cable.

    Značky: #Elektro, #Analog