J310/271 spice models

[bogdan_borko]

Does anyone have spice models for J310 and J271 jfets?

 

[Zen Mod]

.

 

[bogdan_borko]

Anyone? I found j310 but not J271...

 

[Zen Mod]

Anyone? I found j310 but not J271...

2sj74V and 2SK170V will be close enough , for your (our ) needs

anyway - for 271 -try at home pages of :

Motorola
Intersil (Harris)
National
Siliconix (Temic)
Solitron

hope that will help ........

 

[homemodder]

Here you go

.MODEL J271_XN PJF(Beta=1.6m Betatce=-500m Rd=1 Rs=1 Lambda=25m Vto=-2.519 Vtotc=-2.5m Is=461.5f
+ Isr=4.402p N=1 Nr=2 Xti=3 Alpha=32.54u Vk=393.2 Cgd=10.83p M=278.9m
+ Pb=1 Fc=500m Cgs=15p Kf=0.6206f Af=1)


.MODEL J310_XN NJF(Beta=3.384m Betatce=-500m Rd=1 Rs=1 Lambda=17m Vto=-3.409 Vtotc=-2.5m Is=193.9f
+ Isr=1.881p N=1 Nr=2 Xti=3 Alpha=7.533u Vk=74.1 Cgd=6.2p M=464.7m
+ Pb=1 Fc=500m Cgs=6.2p Kf=4.634e-002f Af=1)


Yes bad choky.

By the way zen mod, have you any experience with the doxa amp??

 

[bogdan_borko]

Thanks a lot!

 

[homemodder]

No problema, at least bad choky gave good advice, if you gonna use jfets in audio use those toshibas he mentioned.

 

[john curl]

Sometimes it is just easier to build a prototype.

 

[Zen Mod]

.........
By the way zen mod, have you any experience with the doxa amp??

nope ; I just saw schematic ( same as one shown here on forum , but I didn't analyzed it ; there is certainly at least few mistakes in that schematic .......

why you ask that ?

have one , or need one ?

 

[homemodder]

I listened to one and compared to my electrocompaniet aw250, needless to say i was impressed, thinking of making a clone.