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 red led. Show all posts

Showing posts with label red led. Show all posts

8 Apr 2014

481THz QRSS3 beaconing across the garden

Last night I fired up my 481THz optical kit with poor results: I think the RX unit may have a flat PP3 battery? On the Spectran display the ...

18 Jan 2014

Optical Comms in Vancouver Canada

This morning I received an email from Steve, VE7SL, reporting on his experiments with VE7CA over a 2-way distance of 54km using red LEDs. ...

8 Mar 2013

Source of BRIGHT red LEDs

Some have asked me what LEDs I've been using so far for my optical experiments. Well, these are 10mm diameter "conventional" s...

26 May 2012

My first 481THz 2-way QSO

The 481THz kit at the G3XBM/P end of the path This evening, thanks to Bernie G4HJW , I managed my first 2-way optical QSO over a path of...

26 Feb 2012

Successful 481THz NLOS test (8.63km)

8.63km non line-of-sight reception of 481THz optical beacon Bernie G4HJW set his high power optical beacon running a 1.082kHz tone th...

17 Feb 2012

Optical cloudbouncing (stage 2)

With my QRSS3 success last weekend over a 3.6km non line-of-sight path at 481THz (red light) I've been looking at other possible NLOS cl...

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Roger G3XBM: Burwell, Cambridge, United Kingdom

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