[NJARC] IRE Alignment

[Ray Chase]

Yes sir, you got one of those radios that was disabled during WWII.  
Repair shops were supposed to do that on sets that came in during that 
time.  If you were foreign born (don't know whether citizenship got into 
the equation) supposedly "people" came around to be sure that your radio 
was disabled on short wave.  Since 9-11 things are back to where they 
were in WWII.
As for the IRE dummy load, I believe that was a matching network that 
was used between the RF source and the antenna.  I have info on it 
somewhere here but it's not important, continue doing what you did.  
Maybe RF sources were more leaky then and there was need to make sure 
the source was tightly coupled to the antenna input of the set.  Also if 
you want to make accurate readings on sensitivity you should use the 
network.
Ray

NICHOLAS SENKER wrote:

>Visit our web site - See http://www.njarc.org
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>I have just finished recapping a GE J-71 table radio  and am touching up the alignment.  The procedure (Riders 12-29) calls for a IRE dummy antenna for the RF alignment.  What does this mean?  I just used a loop on my RF generator and this seems to work fine.
>Another interesting thing about this receiver (1940-41 vintage) is that the shortwave bands are dead while the broadcast band works fine.  While recapping I noticed a disconnected wire that was neatly clipped and tucked out of the way.  Reconnecting it to the band switch, I now get SW reception.  I recall a discussion on the Broadcaster about wartime radios having the SW bands  disabled, presumably to limit propaganda?  I think this was one of them?
>Nick Senker
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