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RE: 5755 and a ll1630 for preamp A question about phase of trans.

Phase in this case isn't positive or negative, it's simply the direction of the primary and secondary windings relative to each other. The diagram of this transformer at Lundahl's site shows suggested hookups. Note that their use of 10K terminating resistors in the SE example means the tube must be suited to a 40K plate load (in parallel with whatever is reflected back from the load).

I just realized the 6CM7 is two dissimilar triodes. Is that what you intended, to use each section for a different purpose? If this is a straight line amp with a level control at the input, I think you'll be better served with a 6SN7 or similar.

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