July 2022

Testing the BG7TBL GPSDO (and a couple of others)

by n8ur July 16, 2022

written by n8ur

There has recently been quite a bit of discussion on the fmt-nuts mailing list about the BG7TBL GPSDO and whether its 10 MHz output is accurate. I don’t own one but Wes Stewart, N7WS, sent me his to test.

After letting the unit warm up for 24 hours, I did
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July 16, 2022 0 comment

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GPS TAPR Projects Test and Lab Equipment Time and Frequency

GPS Antenna voltage and current requirements

by n8ur July 16, 2022

written by n8ur

I am working on a current limiter circuit for a GPS antenna bias tee, and wanted to measure the minimum voltage required by particularly modern 3.3V antennas. I did a very simple measurement of a bunch of antennas I had laying around, and these are the results.

I put a
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July 16, 2022 0 comment

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