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 tda2003. Show all posts

Showing posts with label tda2003. Show all posts

18 Sept 2014

Low cost earth-mode beacons?

G1KQH has found some very low cost TDA2003 ICs. I use one of these in my VLF beacon shown in my RSGB RadCom article and on my website . Be...

11 May 2010

4W TX for sub-9kHz experiments

Attached is a picture of the "transmitter" I'm using for my ground and induction communications tests. It uses a TDA2003 audi...

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Roger G3XBM: Burwell, Cambridge, United Kingdom

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