On December 16, 1939, the Benny Goodman Sextet appeared on the "Camel Caravan" program on the NBC Radio Network from station WEAF/Radio City Studios. The aircheck was "Dinah," featured solos from vibraphonist Lionel Hampton and guitarist Charlie Christian.
The Benny Goodman Sextet:
Benny Goodman clarinet
Charlie Christian electric guitar
Lionel Hampton vibraphone
Johnny Guarnieri piano
Artie Bernstein string bass
Nick Fatool drums
You can hear the solo here, and find the transcription, tablature, and more about Charlie Christian here.