07-24-2009, 05:58 PM
Yes, Arran, with the speaker disconnected, the plate of the 47 tube is not getting any voltage, but the screen grid is!
The output transformer is mounted to the speaker on the Model 70, by the way, as it was in all Philco home AC sets through the 1938 model year. In the 1939 season they began putting the output transformer under the chassis in most models. These tend not to survive while the speaker-mounted outputs are usually still good.
The output transformer is mounted to the speaker on the Model 70, by the way, as it was in all Philco home AC sets through the 1938 model year. In the 1939 season they began putting the output transformer under the chassis in most models. These tend not to survive while the speaker-mounted outputs are usually still good.
--
Ron Ramirez
Ferdinand IN
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
