[Hallicrafters] The hot SX28 6V6s

[Guido]

The heat problem in the 6V6s of my SX28 was basically solved by lowering the AC voltage to 110. Household voltage here sometimes soars to 125VAC. Lowering the voltage with a Variac reduced the heat to what one could consider warm and  normal. It was hot to the point where one could not touch the lid just above the tubes.  The tubes still have some bluish glow left though. This tells a lot about the importance of operating these older rigs at the voltage for which they were designed. Anyone remembers when the voltages came up?

73s

Guido KP4FAR