There are a number of ways to convert 6 volt radios to 110. In the old days it was routine for an Elmer to re-engineer the power supply and audio output stages from scratch to use AC set tubes in a re-purposed farm set. I prefer to keep a radio as original as possible. Last year I converted an interesting Setchell Carlson radio to AC power and did so maintaining its unique tube complement: 6D8, 6S7, 6T7, 19, 19, 19.
As you can see, one of the 19s is used as a rectifier. The other two needed pure DC for their filaments, so the easiest solution in this set's case was to keep all filaments DC.
The vibrator was eliminated and a couple of connections were moved, otherwise the original circuit was left entirely intact and the mod is at least theoretically reversible.
03-27-2010, 08:07 PM
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