<https://www.head-case.org/forums/topic/10783-megatron-electrostatic-headphone-amplifier/page/34/#comment-815001>
<http://schema.org/text>
"I have been focusing on gain tubes.  \n\tI've been alternating the E80CC, E180CC, 6189 ... and I think the E180CC (Mullard/Philips) is the one with the best balance (quality vs. gain level).  I liked the E80CC a lot but the gain increase was minimal compared to 12AU7.   \n\tFor the driver's tubes, I've been using ECC803S and several \"esoteric\" 12AX7 for a while, but I opted for the modest ECC83 Svetlana \"Winged C\" and a pair of Mullard CV4004 with unknown mileage too. IMO the most critical here are the gain tubes so I have not wasted much time here.\n \n\n\n\tAs for the \"Jiml/Gilmore\" modification to raise the current to the plate of the driver tube, I think it was a good upgrade (thanks to both of you and Mwl for sharing it).  \n\tIf I'm not wrong, only Michael and I did the mod?\n \n\n\n\t \n "
<https://www.head-case.org/forums/topic/10783-megatron-electrostatic-headphone-amplifier/page/34/?tab=comments>