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Hi Andy, I'd be interested to read that comment if you can tell me where you saw it. The Airspy HF+ does suffer from 'IF blowthough' where signals in the range 0-192KHz can appear elsewhere in the

Mike, if you select another option at boot the Red Pitaya can be used as a single channel SDR? with a PC. Indeed the Red Pitaya is probably the most versatile device listed for the? advanced user.

That's the option I would go for. The ready built amplifier is very good value of money, and as you can remotely select different antenna combinations, it's an ideal basis for further experimentation.

If you want to casually listen to one signal at a time then the receivers mentioned are OK but you can pay a lot and get very little extra. But if you are into digital modes or want to monitor

The main negative factor I have read about the Airspy HF+ Discovery is about the occurrence of aliased signals. And perhaps the low bandwidth. The latter doesn't bother me much. Are the aliases due to

The original messy schematic from 1985 is here: https://www.polyphoto.com/tutorials/ElectronicCircuits/Dual555CapMeter150dpi.jpg ( http://www.polyphoto.com/tutorials/ ) At some point, I'll be making a

Hi Stephen To view the link requires that you jion hackday, whatever that is, and accept By using our website and services, you expressly agree to the placement of our performance, functionality, and

I am sorry that you didn’t receive a reply from the Wellbrook website. This may be due to my server junking some emails or an oversight. Working on the assumption that you may not require the high

I have built a number of small loops from 0.5-meter diameter to a 2-meter diameter including the preamp. I can assure you that one can home brew a well-performing loop for less than $50. The copper

Hi All, This has proven to be a very informative group so far, appreciate the information and willingness to share. I am looking for a loop that to be used as an HF RX antenna (160-10m) in an urban

Found something better on Mini-Circuits SLP-15+ ( https://www.minicircuits.com/WebStore/dashboard.html?model=SLP-15%2B ) SHP-20+ ( https://www.minicircuits.com/WebStore/dashboard.html?model=SHP-20%2B

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