For Dhdoc: After removing top cover, note metal "rings" around
the tubes supported by two pins. The upper round tops of the pins are actually threaded nuts inside. Remove nuts by grasping with pliers and turn left to unscrew, then remove rings and spacers as needed for tube access...........I am now
using electro-harmonix ($20 each) tubes, are much smoother than the JJ E88cc mentioned above, on order for me now are electro-harmonix "gold pin" version which promises to approach
the higher frequency resolution of NOS...........any others out there using these??....Cheapmike
the tubes supported by two pins. The upper round tops of the pins are actually threaded nuts inside. Remove nuts by grasping with pliers and turn left to unscrew, then remove rings and spacers as needed for tube access...........I am now
using electro-harmonix ($20 each) tubes, are much smoother than the JJ E88cc mentioned above, on order for me now are electro-harmonix "gold pin" version which promises to approach
the higher frequency resolution of NOS...........any others out there using these??....Cheapmike