In Reply to: RE: 6CB5 ... yep posted by hifipaul on July 8, 2020 at 11:36:19:
Long Tail Pair. Check out Pete Millett's site, and his E-Linear KT88 amp. His is SE, so a few modifications are needed to mirror it for PP. The seemingly trivial one I favour being a resistor dropping for the input stage's g2 supply, and capacitor bypass to the cathode node, instead of his SE implementation which used a VR tube ref'd to ground. Now in his SE deal, the ground, and cathode are much closer to being the same thing due ot the bypass cap on the cathode...in a LTP, the cathodes are decidedly not at ground, AC or otherwise. While the voltage is small, the difference matters; g2 is a sensitive node.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
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- RE: 6CB5 ... yep - PakProtector 04:08:01 07/10/20 (0)