Category: Electronics

Converting the BITX40: Dual Band HF Radio

BITX40 Dual Band Conversion

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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BITX40 Case Build: W7RLF

I recently took delivery of a BangGood Instrument Case, which sells for about $10. Many BITX40 owners have used this case to good effect. It’s big enough for the BITX40 with some room to spare, and the price is right. Being plastic, some consider it inferior as a radio case, but for me it’s a …

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BITX40 Is it a good Beginners HF Radio?

People often look at the price of the BITX40 and assume that at such a low price point it must be a good entry into HF Radio. But is that really the case? Let’s take a look at a few facets of the BITX40, and you can see if it’s the right radio for you. …

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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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BITX40: Going Digital with JT65

Last week I posted about adding Upper Sideband to the BITX40, which is not an Upper Sideband radio. Once I got that modification done, I could clearly hear the JT65 signals on 7.076mhz, but… what were they saying? It was time to dive into the world of Digital HF! What is JT65? Simply put, digital …

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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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BITX40 Builds: M6YPA’s 3D Printed Case and Microphone

Today we bring you a beautiful 3D printed case from Adrian Cattell, M6YPA. Here are the pictures. See below for Adrian’s description of the case, and how it came to be. Thanks for sharing, Adrian! Update: This case is now available for purchase from Dave, KE0KHA. Click Here to go to his site and get one of …

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The BITX40 FAQ

The BITX40 FAQ All around the web folks are asking questions about the BITX40v3. This is my attempt to answer the most common questions raised. I am not affiliated with hfsigs.com or anybody who is. If you have your own question about the BITX40, leave a comment below and I’ll be glad to answer it. …

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BITX40: L-Match Tuner Update

In a previous post (BITX40: L-Match Tuner for an End Fed Antenna)I built an L-Match tuner using advice from Peter Parker, VK3YE. I also followed his “Tune for Maximum Brightness” RF current indicator. I had indicated that the current indicator worked fine, and I thought I did, but I was not seeing the results I …

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BITX40 Progress: Easier Tuning and a Microphone

In our last BITX40 Progress installment, I showed you the box contents, and a basic setup that I’d come up with. The controls and connectors were all on the top panel, and it was all loose. Since then, progress has been made! I’ve put up an antenna (more on that in another post) and built …

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