The DV-9 was intended for transmitting use only and has a somewhat different internal design than the later DL-9. This tube was made only briefly before being replaced by the Type D transmitting tube.
DeForest DV-9
AC Low Power Transmitting Triode
1926
The DV-9 was intended for transmitting use only and has a somewhat different internal design than the later DL-9. This tube was made only briefly before being replaced by the Type D transmitting tube.
Click the back button on your browser to return to the thumbnails