Dual-stage with level shifting

Circuit #9

A dual stage amplifier with DC coupling between anode and grid.
Practically, Rk1 and Rk2 are decoupled by capacitors, and Rd1 has a parallel capacitor to make sure T2 is driven by the AC signal of T1.

See “Designing Valve Preamps for Guitar and Bass” by Merlin Blencowe, page 105.
A too low value of Rk2 may prevent T2 to converge.

PARAMETERS
V supply
Select T1 type
Ω anode output resistor
Ω cathode bias resistor
Select T2 type
Ω anode output resistor
Ω cathode bias resistor

Resistor bridge

Ω anode to grid resistor
Ω grid to ground resistor

SCHEMATICS