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 g8cyw. Show all posts

Showing posts with label g8cyw. Show all posts

9 Mar 2013

K3PGP receiver for 481THz

One of the simplest, yet highly sensitive, receivers for optical communications is one designed by John K3PGP . The G8CYW design in Practica...

26 Feb 2013

481THz optical tests over the horizon tonight

This evening I am doing my first "over-the-horizon" optical test this year. The main aim is to check performance with the new rece...

28 May 2012

Joining the "over 10km" optical club

This morning I got a note from Stuart G8CYW which surprised me: "Roger, It has occurred to me that you have joined a "select...

3 May 2012

Optical DXing and refraction

Although my own experiments at 481THz have so far been limited to around 9km non line-of-sight, the amateur experts around the world have be...

13 Jan 2012

Optical RX improvements

G8CYW Optical head (April 2011 RadCom) I've now bought some NE5534 low noise op-amps so can implement the full G8CYW optical head ci...

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Roger G3XBM: Burwell, Cambridge, United Kingdom

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