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 optical 481THz. Show all posts

Showing posts with label optical 481THz. Show all posts

8 Oct 2025

Flatlights

Before my 2013 stroke got in the way, I was hoping to get much further over the horizon with 481THz red light. To that end I purchased some...

5 Jun 2013

Cloudbounce and scatter optical and IR tests

This morning I read a most interesting article about French cloudbounce and scatter optical tests using lasers. The article is some years ol...

1 Apr 2013

Tripods for optical comms

The one I missed on eBay This evening I was annoyed with myself for not bidding for a tripod on eBay in time that went for just £6.50 in...

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...

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Roger G3XBM: Burwell, Cambridge, United Kingdom

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