Tag: Dmitry SPICE model

6P15P triode strapped models

I’ve been playing lately with the 6P15P. Also I have developed several spice models of these Russian clones which I will be publishing shortly when I get the time to do the proper write up.

I use Dmitry’s Paint_kit tool a lot. It’s very good and accurate once you learn how to use it. It’s not easy to match triodes first time as many variables are in play. After working with Derk Reefman on the pentode models, I noticed a slight divergence on his triode models. Derk suggested that the best was to use the triode-strapped pentode for this. Here is a simple comparison between Dmitry’s model and Derk’s:

6P15P triode model comparsion
Derk and Dmitry’s models under test

 

Continue reading “6P15P triode strapped models”

4P1L SPICE model updated

Dmitry Nizh kindly worked out the 4P1L triode SPICE model using his great tool:

4P1L_triode_match

 

Here is Dimtry’s model:

** 4P1L_TRIODE ************************************************************

* Created on Mon Jan 07 07:31:48 PST 2013 using tube.model.finder.PaintKIT
* URL: http://www.bartola.co.uk/valves/valve-curves/4p1l/
*————————————————–
.SUBCKT TRIODE_4P1L_TRIODE 1 2 3 ; P G K ;
+ PARAMS: CCG=8P CGP=7P CCP=9P RGI=2000
+ MU=8.232 EX=1.3719 KG1=851.25 KP=108.0 KVB=528.0 VCT=-1.0 ; Vp_MAX=450.0 Ip_MAX=0.08 Vg_step=5.0
*————————————————–
E1 7 0 VALUE={V(1,3)/KP*LOG(1+EXP(KP*(1/MU+(VCT+V(2,3))/SQRT(KVB+V(1,3)*V(1,3)))))}
RE1 7 0 1G
G1 1 3 VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))/KG1}
RCP 1 3 1G ; TO AVOID FLOATING NODES
C1 2 3 {CCG} ; CATHODE-GRID
C2 2 1 {CGP} ; GRID=PLATE
C3 1 3 {CCP} ; CATHODE-PLATE
D3 5 3 DX ; FOR GRID CURRENT
R1 2 5 {RGI} ; FOR GRID CURRENT
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
.ENDS
*$