*-----------------------------------------------------------------------
* Filename: SV3CX300.inc V1 17/6/97
* Simulator: PSpice
* Device type: Power triode
* Device model: Svetlana 3CX300A1
*
* Author: Duncan Munro
* Date: 17/6/97
* Copyright: (C)1997-2000 Duncan Amplification
*
* The following parameters are not modelled:
*
* (1) Heater is not modelled.
*
* (2) Grid current is not modelled, as this valve is
* designed for A1 and AB1 operation.
*
* 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
* G Grid
* K Cathode
*
*-----------------------------------------------------------------------
.SUBCKT SV3CX300 A G K
*
* Calculate reduction in mu at large negative
* grid voltages
*
Emu mu 0 VALUE={PWRS(V(G,K),0.98)}
*
* Calculate change in shape with reducing grid voltage
*
Eshape shape 0 VALUE={(280+V(G,K))/280}
*
Egs gs 0 VALUE={LIMIT{V(A,K)+V(G,K)*7.5,0,1E6}}
Egs2 gs2 0 VALUE={PWRS(V(gs)*V(shape),1.5)*135E-6}
Ecath cc 0 VALUE={V(gs2)}
*
* Calculate anode current
*
Ga A K VALUE={V(cc)}
*
* Capacitances
*
Cgk G K 25p
Cga A G 10p
Cak A K 1p
.ENDS