The lowest noise P is P0099F with 2 nV\sqrtHz [ https://www.interfet.com/jfet-datasheets/jfet-p0099f-geometry-interfet.pdf ]The lowest noise P is 2N5452 at just under 3 nV
The LSK170 is generally available.
It seems that is the one that comes closest to 2SK170?
https://www.digikey.dk/en/products/filter/transistors/jfets/288?s=N4IgTCBcDaIDIGUDSBGA7ABhAXQL5A
It is a little bit expensive if a lot is necessary to do matching.
Price for 100 pcs is not that bad.......
https://www.digikey.dk/en/pdf/l/lin...170-series-n-channel-jfet-amplifier-datasheet
https://www.eetimes.com/quiet-jfet-features-nearly-zero-popcorn-noise/
It seems that is the one that comes closest to 2SK170?
https://www.digikey.dk/en/products/filter/transistors/jfets/288?s=N4IgTCBcDaIDIGUDSBGA7ABhAXQL5A
It is a little bit expensive if a lot is necessary to do matching.
Price for 100 pcs is not that bad.......
https://www.digikey.dk/en/pdf/l/lin...170-series-n-channel-jfet-amplifier-datasheet
https://www.eetimes.com/quiet-jfet-features-nearly-zero-popcorn-noise/
Yes, and due to almost half the input capacity (18 pF instead of 32 pF of 2SJ74) , I’m thinking about pairing it with the JFE2140 (13 pF instead of 30 of 2SK170).They may be able to make some though.
There is now offer this replacement for Toshiba's vintage jFET 2SK170 under ebay item No 185864174433:
https://www.ebay.nl/itm/185864174433
https://www.ebay.com.hk/itm/185864174433
any experiences ?
https://www.ebay.nl/itm/185864174433
https://www.ebay.com.hk/itm/185864174433
any experiences ?
Attachments
2SK170. (wrong naming of images - my mistake)2SK170 or 2SK177?
it seems someone is taking 2SK2145 as substitute for 2SK170, using case adapter pcb
treating those 2 JFets in one case as one
from 2SK2145 datasheet .......X is type, G is GR current rank, in this case 2.6-6.5mA
doable and effective, but only if taken care of current ranges (GR, BL, V) and appropriate translation between origin and substitute
so, practically translated to BL range of 2SK170, 6.5 to 12mA
treating those 2 JFets in one case as one
from 2SK2145 datasheet .......X is type, G is GR current rank, in this case 2.6-6.5mA
doable and effective, but only if taken care of current ranges (GR, BL, V) and appropriate translation between origin and substitute
so, practically translated to BL range of 2SK170, 6.5 to 12mA
Is there supposed to be something underneath those two areas that almost look like, I hate to say this, solder blobs (first picture)? I also think this cat could use a little less solder on those pins personally, but that’s just my own opinion and you know what they say about that.
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