[Milsurplus] Alexanderson alternator on Xmas eve

[Hue Miller]

> There's another name from the past.  Submarines of my era often had a commercial model Rycom
selective voltmeter installed...not in the radio room, but in sonar as a acoustic receiver.   I'll
bet it will make a pretty good VLF receiver.
> Mike / KK5F

So the Rycom was used a kind of narrow-band search receiver,
is this correct? It had its own sensor, or shared the existing one?

I recall the (what i believe was) the sonar receiver on the U-505
at Chicago. It looked about as big as a BC-348. Surely, passive
only. -Hue Miller