The advertisement shown here for the Hallicrafters S-29 receiver appeared 75 years ago in the February 1941 issue of Radio News.  This early portable communications receiver, dubbed the Sky Traveler, covered the broadcast band through 30 MHz in four bands.  It could run either on internal rechargeable batteries or from AC power.  It had a lineup of 9 tubes, including the 50Y5GT rectifier.  All other tubes were one volt filament types.  The set did have a BFO for listening to code, with one tube (a 1G4GT) dedicated to that purpose.

The full manual for the receiver is available online.  You can see a restored version in operation at the following video:

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