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I was thinking about using prebuild filter circuit. I found a chip from minicircuits. 16Mhz low pass ( https://www.minicircuits.com/WebStore/dashboard.html?model=SXLP-16%2B )?but I closes high pass I

Hi Ian, Thanks for that information. I'll check out Spektrum. It may provide some insight. The balcony is swamped with local AM, FM and EMF from the building. It was never going to be a good location

The best receiver is the one you use the most. I found myself using Airspy HF+ Discovery the most. Performance is good enough for all of my use cases, and the price was reasonable. A tiny box plugged

Also note that SDR Play have a useful Spectrum Analyser tool for use with some of their products tucked away in their downloads section. https://www.sdrplay.com/downloads/ A small tuned loop works

I drew up a clearer schematic and block diagram with explanation. To view them full size, select View Gallery, then look to the left bottom it says "View Full Size". It opens it in a new tab at the

Before acquiring my RTL-SDRv3 I tried two cheap SDR dongles as my first foray into SDR. They came from a firm called Cosy Cave on the Channel Island of Jersey. They both suffered from oscillator

Tests on popular receivers can be found here. https://www.ab4oj.com/test/reports.html However performance is only half of the story, a lot depends on your interests, style of listening and how you

I second the Elad. I have it and it is a solid performing SDR. Very compact and well built.

Hi, The Elad S2 is an excellent HF SDR receiver but not always or everywhere. It outstands in urban areas and close to strong signals. But in low noise environment areas, other less expensive SDR can

I own the Afedri SDR Net, SDRplay RSP Duo and Airspy HF+. I've tested all of these units thoroughly on an 80m passive loop, active loops, and tuned loops on LF~HF. For me the Afedri wins, but not by

You can zoom in, it is very large. Same with all the pictures. -- Steve Greenfield AE7HD

Thanks very much for sharing. Can the second schematic be made larger so it can be better read? Steve AA7U

I built a fair number of these, starting in the '70s shortly after Radio Shack started carrying the NE555 timer. I usually used the Micronta 50uA panel meters for the readout. I'd watch for project

Paul, The older ALA100s have lower gain and a higher input impedance compared to the more resent offerings. Therefore, I would suggest that your don’t alter the loop you already have. 73 Andrew

Would suggest Tonne software ELSIE to design crossover filter. Tonne software is exceptionally good. 73, Alan G8LCO

Hello Andrew, I have an elderly ALA100 amplifier & power injector. It is working very well, but I was wondering what recommendations you might have regarding the actual loop. I currently have a

Hi Chavdar, No need to apologise, my webpage regarding the system is quite well hidden, and I haven't done any further work on it for several years. At the time I was trying to develop a low cost

The device you require is called a diplexer. Tonne Software provide a free design tool. http://tonnesoftware.com/diplexer.html Don't worry about making it too complicated. Two coils and two capacitors

Hi Steve, Maybe you could possibly help me out. I?just purchased the Chameleon RXL receive loop. And now I wish I had found this thread before doing so. I’m very new to these antennas. I currently

You mean anything below 14 MHz comes from the loop and anything above 14MHz comes from the dipole? I think you would have to make your own. You will need a lowpass filter on the RX side of your loops'