[NLRS] FYI: Optical QSO

[Zack Widup]

Years ago I saw a circuit that used an OSRAM Golden Dragon LED as a
detector. You had to use an X-Acto knife to cut into the soft clear plastic
encapsulation over the diode and cut one tiny wire. The LED could then be
used as a detector. I cannot for the life of me find the article that
described this use. But it was pretty optimistic about results.

Zack W9SZ

On Tue, Apr 15, 2025 at 12:10 AM Glen Overby <gpoverby at gmail.com> wrote:

> They're using a receiver design by VE2UG, which is based on the one by
> KA7OEI and K0XL.  Transmit is a PWM generator they bought on Amazon.
>
> I'm collecting parts for a system.
>
> 73,
> Glen
>
> On Mon, Apr 14, 2025 at 11:14 AM Jon Platt via NLRS <nlrs at mailman.qth.net>
> wrote:
>
>> Some of us through the years have played with optical contacts.  Here is
>> a link to W1VLFs YouTube video discussing and showing his 940 Nm 14 mile
>> QSO.  The QSB and seeing the half power reduction testing is interesting.
>> https://youtu.be/OXYJw9PyHd8
>>
>> 73, Jon
>> W0ZQ
>>
>>
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