This is a story of two bellies …
… or a story of an S3 grid which is **NOT** internally connected to the cathode,
This is the Twin Belly Topology, … (C) 2014-10-17, zjj_wwa, of hiend-audio.com
One “Transconductance Belly” is facing down.
The other “Transconductance Belly” is facing up.
But what happens when we multiply
the “belly down” transconductance by the “belly-up” transconductance?
Envision the operating points at say,
U_a = 1500V,
U_s1 = ( -140V DC + Signal_AC),
U_S2 = 600v = Constans,
U_s3 = ( -140V – Signal_AC).
My question to you: Belly_Up x Bellly_Down = Straight Wire With Gain ?
Your comments – Kindly Welcome !