Adding 80m to the BITX40

Modifying the BITX40 for Upper Sideband

BITX40: A simple microphone made from scraps

A common question with new BITX40 owner is “Which microphone should I use?” People have used modified CB microphones, Baofeng microphones designed for HT’s, and various homemade microphones. The BITX40 comes with an electret mic element and a small switch to make a microphone with, but the switch is not very good. I purchased 10 small switches for use in various projects and I’ve used one of them for mine. For supplies, I used the included mic, some random stranded wire salvaged from various electronics, the aforementioned switch, an empty generic Airborne container, and the USB cable from a dead keyboard (a mouse cord works fine too).

The pictures speak for themselves, and so I’ll let them do the talking. Hot glue was used to hold down the mic element, and simple electrical tape provides grip. And a word of caution when cutting up the lid: Do it over a trash can! It contains silica gel beads that will go everywhere. What kind of mic are you using? Let us know in the comments below!



1 ping

    • Mike on March 25, 2017 at 1:47 PM
    • Reply

    We’re can I by up grade parts that will work with bits 40 for this is going to be a first-hand experience. ! As push to talk switch mic. Nobs. ! Any info will help

    1. I’ve used the 36mm knobs on Ebay, and the smaller 20mm knobs work fine too, although they don’t work with the volume pot the bitx40 comes with as it has an oddly sized shaft. You can modify just about any PTT Mic to work with the bitx40. I recommend joining and the less official Facebook group at for help and ideas 🙂

  1. […] so many uses for mine that I hardly know when to start. I’ve used mine to do everything from building a microphone for my BITX40 to building a dipole center that is weatherproof even in heavy […]

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