"Biz WDØHCO" wrote in message
...

This is fun! Well yea about the regen for sure - Some of those Superhets
leaked just as much. (Like a T.O. in a leatherette covered plywood box)


The page I posted on the binaries says the Scott REE was used in the crew's
quarters. Was the well shielded Scott radio provided so crewmen wouldn't be
tempted to bring their own radio on board?


but think about this... middle of the ocean -
late at night -
100's of miles from anything -
floating around in a sub with everything turned off -

During a war under radio silence with just receivers turned on...

100 miles seems possible to me.



I think "possible" and "iffy" are two ways of saying the same thing from
different viewpoints. I suspect the usual thunderstorm crackle from South
and Central America, the Caribbean, the Mediterranean and Africa would
overwhelm local oscillator radiation from a superhet at much less than 100
miles nearly all the time.

All bets are off in the case of a regenerative receiver being used with the
detector's regeneration control turned up into the oscillation region in
order that an anticipated CW signal could be heard more clearly.

The posted page also says the Germans were suspected of being able to listen
in on the 455 kc IF radiation. This would even more tenous than local
oscillator radiation. Again, not impossible, but I doubt long range
detection could be done with any reliability.

I don't doubt ships were being detected at long range, and using well
shielded receivers was a wise precaution. But I'll speculate that German
code breaking detected at least as many ships as long range direction
finding, and it wasn't immediately obvious to our Navy just what tipped off
the ship's location.

Frank Dresser