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 phlatlight. Show all posts

Showing posts with label phlatlight. Show all posts

7 Oct 2021

Phlatlights

In 2012, I bought several of these from the USA. My intention was to use these very powerful LEDs in my experiments with 481THz light commun...

9 Apr 2014

Phlatlights

When I have repeated my over-the-horizon NLOS optical (red LED) tests at 481THz using LEDs bought from Hong Kong, I must remember to try ...

6 Oct 2012

Over-the-horizon on 480THz

My order for 3 off 12W red LEDs known as PT54 Phlatlights has arrived. These are VERY VERY bright LEDs mounted onto substantial heatsinks...

29 Sept 2012

QRO optical beacon for over-the-horizon tests

12W red LEDs for optical beaconing This afternoon I ordered 3 off 12W red LEDs, called a Phlatlight PT54, from the USA. These were origi...

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Roger G3XBM: Burwell, Cambridge, United Kingdom

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