Well, I feel stupid. After days of figuring out why I was getting an ugly feedback squeal coming everytime I tried to plug in my TenTec 1056 into something. Finally, today, on a total lark, I swapped out the cable. And… voila. Worked perfectly. So, here’s some Morse code recorded directly from my radio (recorded using GarageBand):

Recording from my TenTec 1056

Addendum: You could read the morse directly from this spectrogram that I made of the resulting audio this improved spectrogram that I made of the resulting audio. You can see the obvious strong signal at the bottom, but at least three or four other signals scattered up in frequency from there.

[tags]Amateur Radio[/tags]

Addendum: the two loudest signals in the above translate to:
= SEE U R IN MN EARL BUT NOT SURE WHERE BIGFORK IS LOCATED = I LIVED IN MN
MANY YEARS AGO
and
BUT I GUESS WHEN WE GET MORE IN TO WINTER THINGS GO BTR AT LEAST NOT SO MUCH QRM = HR ON 40 ES 80 SU