Friday, December 6, 2019

Decoding FT8 with a simple 3 transistor receiver and laptop computer.

About 8 years ago, before the FT8 mode was invented, I built a simple receiving converter. When used with a laptop computer with SDR software it could receive signals on segments of the 80 and 40 metre amateur bands.

It was very crude. For example there was no image rejection. Therefore signals on the lower side of the centre frequency would also appear above (with inverted sideband) and vice versa. Anyway yesterday I got it out to see how it would work on FT8. It did! More in this video!

PS: Find hints and tips for working DX in Minimum QRP. It's the top-selling manual on the equipment, antennas, operating and strategy of successful QRP operating. And its techniques work for 100 watts as well. It's available for under $US 5 each in electronic form. Or you can get a paperback version. Visit VK3YE Radio Books to find out more. 

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