I used to have the 5751 windmill getter with my tube headphone amp about 15 years ago. Sounded amazing with great detail and delicacy. Lush and warm without being mushy. Raytheon 5751 windmill is king of 12ax7 just like Raytheon 5814 2 mica black plate is the king of 12au7 (I had a 12au7 tube hp amp too).
Raytheon 5751 Versions
Wondering anyone had experience with the wonderful Raytheons
I have the NON windmill Grayplates
What sound difference Are the windmill versiopns
I gather more lush mid band on the windmills.