I first heard about this accomplishment about 12 years ago and was able to find very little technical info about it online - so I did a little searching, found Larry's number in Kentucky and called him on the phone. He had no email address that I was able to find.
We spoke briefly to coordinate a time when I could call again for a more detailed conversation. That conversation lasted just under an hour.
It was amazing to hear Larry tell the story in his own words, filling in details that were missing from the online and newspaper resources that were available.
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The ARRL published a write-up of Larry's Apollo reception here.
Fast forward to the near future:
As soon as this February, the Japan Aerospace Exploration Agency (JAXA) will have two ham-band transmitters sending PSK31 data on 437 MHz: one will be in lunar orbit; the other will be on the Moon's surface.
The mission will only last 4 or 5 days and I'm hoping that even more detailed info will soon be published to describe what type of antenna might best be suited to receive these transmissions. Will a simple Yagi work? Fortunately, resources are available for circularly polarized antenna construction.
The AM transmitters Larry was able to received had an output power of 20 watts. I'm guessing that reception of a 1-watt PSK31 signal should be fairly easy in comparison...?