07-29-2026, 08:00 PM
Arran,
I remember restoring an AC/DC portable that had an elaborate AC to DC switch that put the tube filaments in series when using AC and rearranging for two sets of 2 to get 3 volts in DC mode. At first I didn't know what was happening until I noticed that the filament voltage was two D cells.
I remember restoring an AC/DC portable that had an elaborate AC to DC switch that put the tube filaments in series when using AC and rearranging for two sets of 2 to get 3 volts in DC mode. At first I didn't know what was happening until I noticed that the filament voltage was two D cells.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
