Category: Amateur Radio

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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BITX40 Builds: AB1OP and the PC Power Supply Case

Ralph [AB1OP] shared his BITX40 build on the BITX40 Facebook group this week. For his build he’s re-purposed an older PC Power Supply case, and given it a custom printed front panel. Ralph explains what it took: “This is my BITX40 pcb in an old PC PSU enclosure – just enough room. In fact I …

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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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BITX40 VFO Alternatives (and more!)

The BITX40 is a great radio but before they started shipping with a digital VFO, the BITX40 VFO was a big hurdle to getting on the air. The VFO is what tunes the radio, and the BITX40 VFO isn’t very stable. This can make it hard to stay on a frequency once you tune to it. …

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BITX40: L-Match Tuner for an End Fed Antenna

Can you hear me now? With my BITX40 in a temporary enclosure and with the PTT switch and Mic connected, it was time to try to make some contacts. I’d tuned the trimmer capacitor next to L4 it so that I could get into the upper part of the US 40M band and ended up …

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BITX40 Project Progress

A week ago I showed you the BITX40, a 40 Meter SSB radio for $45 from hfsigs.com in India. The kit arrived, and we’ve managed to put it together without letting the magic smoke out! Let us look at how the kit arrived and a minor challenge that was overcome. Unboxing the BITX40 was quite interesting. …

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40 Meters for $45: The BITX40 SSB Tranciever project.

This time around we’ll talk about an exciting radio: The BITX40 kit from hfsigs.com in India. More about that in a minute! The most expensive thing about ham radio is not getting your license. In fact that’s probably the single cheapest part of the whole hobby! Just some study time and $15 to take the …

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Amateur Radio: Dissipating Static Electricity on wire Antennae

We’re trying to get my friends station setup complete. We got his radio installed, and an End Fed Half Wave (EFHW) 40-20-15-10M antenna installed. The problem is that electrical noise is fairly bad on it, and he can hardly hear some signals. One solution to this is to make an RF Choke out of extra …

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