Roger G3XBM's (Mainly) Amateur Radio Blog

Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.

Showing posts with label upconverter. Show all posts

Showing posts with label upconverter. Show all posts

21 Dec 2018

VLF upconverter

Amateur VLF transmissions demand very narrow bandwidths, high stability, long integration times and special (free) software. By contrast, ...

27 May 2015

VLF upconverter

VLF upconverter Some years ago I was looking for a simpłe VLF up-converter (to receive SAQ) and came up with the simple circuit shown in...

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Roger G3XBM: Burwell, Cambridge, United Kingdom

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