Sounds like a sweet find. Grab an old reel‑to‑reel or a cassette recorder, set it up on a quiet bench, and point it at the radio. Use a low‑pass filter—just a small piece of wire wrapped around a magnet and taped in the input line—to smooth out the hiss. Let the tape run a bit longer than the burst so you capture the whole segment. When you playback, do it with an analog amp or a simple tube headphone amp, keeping the volume low enough that the old voice stays true and doesn’t bleed into digital noise. And don’t forget to tape the whole thing again with a backup reel—better safe than sorry.