Occasionally here at OneTubeRadio.com, we have, well, a one tube radio. This one appeared 80 years ago this month in the November 1934 issue of QST.

This circuit uses half of the dual-triode Type 19 tube as the regenerative detector, and the other half as an audio amplifier. It’s not very different from the 1950 Boys’ Life receiver I featured in an earlier post.  The tube is equivalent to the slightly more modern 1J6 with an octal base, and that tube is available for less than $4 from Antique Electronic Supply.

If you’re looking for a simple circuit for a one tube radio, here it is! For pointers on finding some of the other parts, see my earlier article on the subject.