Reply To: TWTTB Posted byThe Well Audio 02/04/2023 › Forum › Analog line › TWTTB › Reply To: TWTTB 02/04/2023 at 19:18 #2368 The Well AudioParticipant I have used a JJ tube, it’s 77.8 mm tall. The EZ80 has lower current, but it should work. I would mount the EZ81 horizontally.