Category: Amateur Radio

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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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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Converting the BITX40 to 20M

A very hacked BITX40

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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The Quest for the Genuine IRF510

The Problem Recently, I had a need to replace the IRF510 PA MOSFET in my BITX40 radio. A malfunction with my VOX PTT circuit caused it to stay keyed down for a very long time while unattended. Oops! With that fixed, it was time to replace the IRF510. The Search I scoured the usual places …

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QRP Antenna Pole: 20ft for $10

Jackite Pole Comparison

No matter whether you’re using JT65, Voice, CW, or any other mode, you need to have an antenna. When you’re QRP, you also need all the help you can get. And high is might,. right? If you are going to be portable, you need a portable antenna. At my home, I don’t have room for …

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