[Milsurplus] E. H. Scottr RCH or SLR-F?

[Al Klase]

Ed Zeranski wrote:

>     Well, I think Scott of Chicago was scamming a tad with that "U Boats
> will copy your Osc stuff" but it sold a grunch o' radios.  Any record of a U
> Boat ever  DFing an RAL/RAK or a local osc?? ....

To better understand what was going on here, one needs to 
consider some of the radios in use in the period just before 
the war.  E.g., the SE-1420/IP-501, a design dating to 1918, 
used a regenerative detector fairly tightly coupled to a 
large antenna.  Radios of this sort were commonly used on 
merchant ships to stand watch on 600 meters.  I've been able 
to hear my set, tuned to 500 KC, a kilometer away with a 
portable radio held out the car window.

There are also stories of radio operators, on ships in close 
proximity, supposedly observing radio silence, communicating 
by "keying" their autodyne receivers by touching the antenna 
terminals.

All of the WWII military shipboard receivers were designed 
with an eye toward controlling radiation, both for security 
and to limit interference to other sets on the same vessel. 
  The moral receivers needed to meet the same standards.

Even the regenerative RAK/RAL's have two RF stages and a lot 
of shielding and filtering.  They are very hard to hear.

73,
Al



-- 
Al Klase - N3FRQ
skywaves at webex.net
Flemington, NJ 08822
Web Page:  http://www.webex.net/~skywaves/home.htm