*----------------------------------------------------------------------- * Filename: dm6v6.inc V2 12/10/97 * Simulator: PSpice * Device type: Power beam tetrode * Device model: 6V6GT * * Author: Duncan Munro * Date: 4/5/97 * Copyright: (C)1997-2000 Duncan Amplification * * * V2 [12/10/97]: Screen current limited to prevent screen current * draw at Vs = 0. * * The following parameters are not modelled: * * (1) Heater * (2) Grid current is an approximation * * Please note that this model is provided "as is" and * no warranty is provided in respect of its suitability * for any application. * * This model is provided for educational and non-profit use. * * Email queries to postmaster@duncanamps.com * * Pins A Anode * S Screen * G Grid * K Cathode * *----------------------------------------------------------------------- .SUBCKT 6V6 A S G K * * Calculate contribution to cathode current * Eat at 0 VALUE={0.636*ATAN(V(A,K)/10)} Eme me 0 VALUE={PWR(LIMIT{V(A,K),0,2000},1.5)/1300} Egs gs 0 VALUE={LIMIT{V(A,K)/600+V(S,K)/14+V(G,K)*0.65,0,1E6}} Egs2 gs2 0 VALUE={PWRS(V(gs),1.5)*1.45E-3} Ecath cc 0 VALUE={LIMIT{V(gs2)*V(at),0,V(me)}} * * Calculate anode current * Ga A K VALUE={V(cc)} * * Calculate screen current * Escrn sc 0 VALUE={0.7*V(gs2)*(1.1-V(at))} Gs S K VALUE={V(sc)*LIMIT{V(S,K),0,10}/10} * * Grid current * Gg G K VALUE={PWR(LIMIT{V(G,K)+1,0,1E6},1.5)*(1.25-V(at))*650E-6} * * Capacitances * Cg1 G K 7.5p Cak A K 9p Cg1a G A 0.7p .ENDS