Re: JHS Superbolt

Posted by Frank_NH on Apr 12, 2016; 3:20pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/JHS-Superbolt-tp8459p29698.html

No, I'm using models available from the internet.  These are some JFET models used by Runoffgroove (courtesy DIYStompboxes.com):

* J201 with VGSoff=-0.8V and IDSS=0.6mA
.MODEL J201 NJF (VTO=-0.8 BETA=0.94M LAMBDA=2M IS=114.5F RD=1 RS=1
+ CGD=4.667P CGS=2.992P M=.2271 PB=.5 FC=.5 VTOTC=-2.5M BETATCE=-.5
+ KF=604.2E-18)


* 2N5457 with VGSoff=-1.6V and IDSS=3.3mA
.MODEL 2N5457 NJF (VTO=-1.6 BETA=1.29M LAMBDA=2M RD=1 RS=1 CGD=6E-12
+ CGS=2.25E-12 KF=6.5E-17 AF=0.5)


* MPF102 with VGSoff=-2.5V and IDSS=6mA
.MODEL MPF102 NJF (VTO=-2.5 BETA=0.96M LAMBDA=5M RD=1 RS=1 CGD=1.54248P
+ CGS=2.567P PB=1.49 KF=7.90591F AF=499.953M)

I've also got some LED models (specifically red LEDs).  Everything else I've used from the LTSpice library.  They even have an LT1054 charge pump model, and it works really well to simulate different charge pump configurations.

My main use of LTSpice recently was to develop an amp sim circuit based on a pre-existing solid state amp schematic.  I use LTSpice to simulate both the original circuit and my sim to make sure the frequency response and wave forms are similar in different parts of the circuit.   Someday, it would be fun to simulate tube stages, but I'm not there yet...