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Suitable jfet for an zero GNFB amp?
Suitable jfet for an zero GNFB amp?
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Old 28th November 2008, 01:03 PM   #11
jacco vermeulen is offline jacco vermeulen  Netherlands
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Example , not exactly low noise but it has a nice zero TC curve.
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Old 28th November 2008, 03:45 PM   #12
roender is offline roender  Romania
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Quote:
Originally posted by jacco vermeulen
Example , not exactly low noise but it has a nice zero TC curve.
Wow, 2n5564 price tag 56GBP at Farnell UK
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Old 28th November 2008, 04:01 PM   #13
jacco vermeulen is offline jacco vermeulen  Netherlands
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Old 28th November 2008, 04:47 PM   #14
roender is offline roender  Romania
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Thanks Jacco

2n5566 = 20mV delta Vgs
2n5565 = 10mV delta Vgs
2n5564 = 5mV delta Vgs

Zero TC at Id around 4mA
Yfs around 10mS aT Id=4mA


2n5564 seems to be a good candidate for my amplifier but is hard to find and very expensive
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Old 28th November 2008, 05:08 PM   #15
homemodder is offline homemodder  Portugal
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You could also have a look at interfet, they have some good jfets. Replacements for japanese jfets, and theres also a p channel part. Full specs are not given beyond the obvious but they should be close to the japanese counterparts. IFN146 and 147 are very good. Heres a link maybe theres something you could use, www.interfet.com/pdf/j_equiv.pdf.

Jacco you seem to know where to obtain some difficult parts, have anywhere you know I could get hold of 2SC3067 in big quantaties, but in Europe, Im tired of ordering from east.
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