Air-King Perfect A.C., c. 1931
Short Wave Adapter, uses 1 tube and plug-in coils. If you know anything about this, please
To use the Short Wave Adapter, remove the detector tube from a 1920s or
1930s AC powered broadcast receiver, insert the plug from the adapter into the
receiver's detector tube socket and insert the detector tube from the broadcast
receiver into the Short Wave Adapter's tube socket.
Connect a long wire wire antenna and ground to the ANT. and GND. terminals on
the Short Wave Adapter. Tune for shortwave stations using the selector control
on the adapter. Use the auxiliary control to adjust regeneration.
Additional plug in coils were available to tune different bands.
The only thing used in the broadcast receiver is the power supply and the audio
amplification stages. The Short Wave Adapter becomes the tuner.