I still have the recording  on an old web page of the morse code it sent to commemorate the 40th anniversary of the launch of the first amateur radio satellite (12/06/1961):

https://kr1st.com/marconi.htm

That recording is almost 20 years old. Time sure flies!

73,

--Alex KR1ST

On 2021-12-01 10:24, Robert Bruninga wrote:

For what it's worth, since the Russian space littering event, I am getting almost

daily Close approach alerts on PCSAT (is a high orbit, originally 800 km high).

Alert miss-distances seem to be on the order of 200 to 500 meters
Example Alert below at end..

Another day in space (after 20 years for PCSAT
Semi-operational: http://aprs.org/pcsat.html

Live downlink (W3ADO-1): http://www1.findu.com/cgi-bin/pcsat.cgi

One minute serial nos (T#xxx), suggest a wake from1 to 8 minutes per orbit.

PCSAT is unique in that is has no CPU or Operating system.  It is just two off-

the-shelf KPC9612 TNC's (chips in sockets, etc) and uses their built-in sysop 

features for telemetry, command and control.

Follow-on APRS satellites:  http://aprs.org/sats.html

Bob, WB4APR

---------- Forwarded message ---------
From: ...space-track.org>
Date: Tue, Nov 30, 2021 at 2:40 PM
Subject: PCSAT Close Approach Notification

The United States 18th Space Control Squadron has identified a close approach between PCSAT (SCC #26931) and SCC #30230

Time of Closest Approach: 2021-335T02:20:51(UTC)
Probability of Collision (Pc): 0.0003769653
Overall miss distance: 338.0m