bogdan_borko said:
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 ........
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??
.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??
No problema, at least bad choky gave good advice, if you gonna use jfets in audio use those toshibas he mentioned.
homemodder said:
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 ?
I listened to one and compared to my electrocompaniet aw250, needless to say i was impressed, thinking of making a clone.
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