old jfet bvequivalent

renjiish · 11th August 2003, 09:43 AM

please help me to find the data of this transistor which i am removed from the input stage of my amplifier.it is a jfet which is not available in india.so please help me to find the equivalent

Netlist · 11th August 2003, 12:52 PM

Hi renjiish
What's written on that transistor?
Is it
S2435
TI122J

How do you know it's a fet?
What brand and type of amp do you have?

Greetings
/Hugo

renjiish · 12th August 2003, 05:03 AM

i removed it from voxson,italian made amplifier.on the pcb it had given the sourse and drain markings.from that i understood thatit is an fet.so i replaced with 2sk163 from hitachi.it is working fine even though the treble quality is degraded. if i can find the original replacement it will be very helpfull for me.

Netlist · 12th August 2003, 09:41 AM

Sorry, I think I'll have to pass here

/Hugo

yeti · 13th August 2003, 11:03 AM

Just try a Bf 245 B; this is the typical european j-fet, it should do for most cases.

renjiish · 13th August 2003, 11:26 AM

thank you very much sir.even iam planning to use bf 245 b.what about using J201.many people are recomending j201 for preamp input stage.what is your opinion about this one.

13th August 2003, 11:03 AM	#5
yeti diyAudio Member Join Date: Nov 2001 Location: Ewersbach	fet Just try a Bf 245 B; this is the typical european j-fet, it should do for most cases.

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11th August 2003, 12:52 PM	#2
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Hi renjiish What's written on that transistor? Is it S2435 TI122J How do you know it's a fet? What brand and type of amp do you have? Greetings /Hugo

12th August 2003, 05:03 AM	#3
renjiish diyAudio Member Join Date: Aug 2002 Location: United Kingdom	i removed it from voxson,italian made amplifier.on the pcb it had given the sourse and drain markings.from that i understood thatit is an fet.so i replaced with 2sk163 from hitachi.it is working fine even though the treble quality is degraded. if i can find the original replacement it will be very helpfull for me.

12th August 2003, 09:41 AM	#4
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Sorry, I think I'll have to pass here /Hugo

13th August 2003, 11:26 AM	#6
renjiish diyAudio Member Join Date: Aug 2002 Location: United Kingdom	thank you very much sir.even iam planning to use bf 245 b.what about using J201.many people are recomending j201 for preamp input stage.what is your opinion about this one.