The connection between Hallicrafters and 1940s electronic warfare

A B24’s Hallicrafters S27 (Photo:

One of my favorite ham radio blogs is that of John (AE5X). Like me, he’s a QRPer–meaning, as amateur radio operators, we love making contacts across this great globe of ours using very low power…typically 5 watts or less. The challenge is fun, the medium is magical.

John’s also a radio historian and shortwave radio listener. Yesterday, he posted a most fascinating look at how the Hallicrafters S27s played an important role during World War II countering very innovative radio guidance techniques by the Third Reich.

You should bookmark John’s blog, as he post many radio related topics that the SWL would find enjoyable, whether it be about numbers stations, QSLs or even his own experience learning Russian via shortwave.

But first, read: Hallicrafters and electronic warfare in 1940 on 10 meters. . .or, an ‘Aspirin’ for the ‘Headache’