DeForest DL7 (Bakelite)DC Audio Output Triode1926
The DL-7 was made with a black bakelite base in 1926 but by 1927 had an Isolantite base.
Click the back button on your browser to return to the thumbnails
The DL-7 was made with a black bakelite base in 1926 but by 1927 had an Isolantite base.
Click the back button on your browser to return to the thumbnails