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The One Watt Open Hardware Guitar Amplifier.
Measuring 100 JFET J201 Transistors.
8 years 6 months ago - 8 years 6 months ago #355
by Ray
7 years 8 months ago #521
by Ray
Replied by Ray on topic Measuring 100 JFET J201 Transistors.
Hi,
There is plenty of information online about the J201 substitute:
- J201 Substitute in diystompboxes
- J201 Substitute in madbeanpedal
- J201 Substitute in ssguitar.com
The J201 is quite unusual and it is still manufactured but in SMD model (not thuhole), some folks use a sot23 to thuhole adapter that works fine with some extra work.
Righ now I have checked mouser and they have J201 in stock (smd and thruhole models):
www.mouser.co.uk/All-Manufacturers/_/N-0...1+transistor&FS=True
However, if you are using for a different model, maybe the closest jfet you can get is the 2N5457, 2N5458 or MPF102.
You may need to adjust some resistors using this procedure:
There is plenty of information online about the J201 substitute:
- J201 Substitute in diystompboxes
- J201 Substitute in madbeanpedal
- J201 Substitute in ssguitar.com
The J201 is quite unusual and it is still manufactured but in SMD model (not thuhole), some folks use a sot23 to thuhole adapter that works fine with some extra work.
Righ now I have checked mouser and they have J201 in stock (smd and thruhole models):
www.mouser.co.uk/All-Manufacturers/_/N-0...1+transistor&FS=True
However, if you are using for a different model, maybe the closest jfet you can get is the 2N5457, 2N5458 or MPF102.
You may need to adjust some resistors using this procedure:
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7 years 8 months ago #527
by Ray
Replied by Ray on topic Measuring 100 JFET J201 Transistors.
Im not aware of suppliers for jfets in Brazil, maybe asking in audio forums you can get some ideas. However finding alternative parts and adjusting them to your circuit is fan and can lead you to new sounds 
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