[Collins] 516F-2 Lowering Voltages

[Byron Tatum]

Hello-
    Thanks to everyone for their advice regarding my desire to lower my 516F-2 
voltages. After studying the aspects of using filament transformers as 
autotransformes to lower the supply voltages my final questions are:
       1.  What is preferred - To use the fil windings of 516F-2 itself as 
autotransformer function or to use a separate fil transformer in front 
of 516F-2?
       2. If I use a separate fil transf in front of 516F-2 what should be its 
ratings?
                                                        Thank you, Byron WA5THJ