Gain stage and DC-coupled cathode follower

Circuit #4

Two triodes set as a gain stage (T1) which output is DC-coupled to a cathode follower (T2).

A too low value of Rk2 may prevent T2 to converge.

PARAMETERS

Vb V supply

Select T1 typeECC81ECC82ECC83ECC88

Ra Ω anode output resistor

Rk1 Ω cathode bias resistor

Select T2 typeECC81ECC82ECC83ECC88

Rk2 Ω cathode output resistor

SCHEMATICS