Hello,

on 3. October 2020 at 18:50 UTC we had the following QSO:

DC6UW in JO51XO with DL3ARM in JO60LK   QRB = 147km

QRG: 440THz / 630nm red light

we tested AM and also FM with 25kHz subcarrier. reports 59 / 59


more stations had QSO the same distance later on this evening:

DL9WNM JO51XO
DM4TR JO60LK
DJ4MF JO60LK
All stations had LED as TX (Phlatlight PT39 red etc. )

As RX we had Avalanche Photo Diodes.
RX / TX Lenses are 300x400mm Fresnell with 700mm focal lenght.


see/listen  more :

http://dl0rcp.bplaced.de/index.php/themen/88-lichtfunk-lichtsprechen-lichtbaken/lichtfunk-147km 

sorry for that is only german language.


73 Jo DL3ARM