Category Archive: Amateur Radio

Oct 09

QRP Labs VFO Review [Spoiler: we love it!]

I’ve had the QRP Labs VFO for many many months now and it’s about time I got around to actually writing a review of it. When I originally purchased my BITX40, it did not come with a digital VFO. With the analog VFO, tuning was an exercise in futility. I had never owned an HF …

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Sep 25

QRP Labs U3S WSPR Transmitter Build and Test

The QRP Labs U3S is a multi-mode transmitter kit. It outputs 200mw of power on any band you have a filter for, and is extendable to up to 6 bands that it can rotate through. It’s only $33 and is incredibly capable. Let’s check it out! I received the U3S in April 2017, but was …

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Sep 03

An Inexpensive Digital Multimeter for the Thrifty Ham

When playing with ham radio or any other electronics, it’s pretty obvious that you need a Multimeter (DVM, Meter, whatever you want to call it) and if you’re like me, you’re on a bit of a budget. For me, I wanted to accurately set the bias on the IRF510 PA in my BITX40. This requires …

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Aug 13

20M Inverted V with Lightweight Dipole Center

One of the many joys of being a ham radio operator is building antennas. I’ve covered the L-Match tuner and long wire antenna in the past, and while it’s a great way to get on the air, it is a compromise antenna. It’s not resonant, and so it is less efficient. When you’ve only got …

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Aug 10

Converting the BITX40 to 20M

20m BITX40 conversion IMPORTANT- READ THIS FIRST [UPDATE 11/14/2017]: After even more experimentation, I have concluded that this method works great for the Band Pass Filter, but that the BITX40v3’s PA is not optimized for operation above 40m. It will work on 20m, but at reduced output of only 1 watt. The following information is left …

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