[Milsurplus] is that an oscillator I hear whining?!

[Joe Foley]

I dunno,........

The whole thing sounds a little optmistic considering
the normal problems with un-intended noise, both
aboard ship and nearby weather conditions.  That's a
pretty small signal you'd be listening for.  How did
the listener block out his OWN oscillator?

Joe

--- Richard Brunner <rbrunner@gis.net> wrote:
> This is an interesting subject I have been following
> for some time.  It has been
> believed in our electronic community that the
> Germans did df'ing on receiver
> radiation, but I have been hard put to confirm it. 
> I have corresponded with
> Germans, and there is no evidence that it was done
> on a routine basis, though it
> could have been done on individual initiative.  They
> certainly knew about it, but
> believed one would have to be in the close vicinity
> of the ship to hear anything.
> There was a magazine article in the late 1920's
> reporting that ship operators could
> hear receiver radiation up to 30 miles at sea, so
> that is a reasonable range for
> regenerative receivers.  Using underwater listening
> ger�te/apparatus, subs could
> hear ship's screws from 20 to perhaps 50 miles, (50
> miles is debated) so there
> would be no advantage in listening for receiver
> radiation.   Some German CO's
> were paranoid with fear that we were df'ing on their
> receiver radiation, and made the
> RO's shut down, and we weren't listening either.


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