Category Archive: Hacks

Jun 08

Converting the BITX40: Dual Band HF Radio

One of the beautiful things about the BITX40 is that it is very hackable. If you want to add a feature to it, it’s almost certainly possible. In a previous post, I showed a quick and dirty way to add 80m to the BITX40 by bypassing the Band Pass Filter. That method works, although it’s anything …

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Apr 19

BITX40: Vox for digital modes

Last week I talked about Going Digital with JT65 on the BITX40. In that article I mentioned that to key the radio automatically either a computer interface  or a Vox circuit would be needed. It was my intention to use a vox circuit. I posted to my usual haunt, the BITX40v3 group on Facebook and asked …

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Apr 07

Modifying the BITX40 for Upper Sideband

These are the capacitors to remove, c91 and c92

Because some digital modes require Upper SideBand (USB) to work properly, many people have been wondering how to get the BITX40 on Upper Sideband. Well, I’m here to show you- it’s pretty easy! First, we need to understand that to get the BITX40 on Upper Sideband, we just want to change from a negative offset …

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Mar 20

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 …

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Mar 06

Adding 80m to the BITX40

Update: We’ve not surpassed just bypassing the BPF, and have made it a dual band radio. More here: http://miscdotgeek.com/bitx40-dual-band-conversion/ A common question for people have about the BITX40 is “Can I make it work on [insert band here]?”. The answer is that yes, you can make it run on other bands, and we’ll show you how …

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