2sk/lsk389 are a pair, but the standard spec allows 0.9:1 matching
Yup Im well aware that a single 389 is a matched pair..
I need two 389s
do you want a 389 that is tightly matched within the pair?
or do you want standard 389 and a pair of these selected for similar Idss?
the standard 389 is not a matched pair, look at the datasheet, it specifies Idss within 0.9:1 (Idss1/Idss2 has a min of 0.9)
or do you want standard 389 and a pair of these selected for similar Idss?
the standard 389 is not a matched pair, look at the datasheet, it specifies Idss within 0.9:1 (Idss1/Idss2 has a min of 0.9)
It's over 7years since I took delivery of these jFETs.
I had forgotten I spent over $400 supporting the group buy.
I still have pairs of 5point matched grade A and grade C of the LSK170 for sale.
I had forgotten I spent over $400 supporting the group buy.
I still have pairs of 5point matched grade A and grade C of the LSK170 for sale.
do you want a 389 that is tightly matched within the pair?
or do you want standard 389 and a pair of these selected for similar Idss?
the standard 389 is not a matched pair, look at the datasheet, it specifies Idss within 0.9:1 (Idss1/Idss2 has a min of 0.9)
Hi Andrew,
Sorry for the delay, I had to take the dog for an very urgent walk.............
I dont think I worded my requirement well enough..
I know they have a 0.9:1 lower limit and thats all it is, the bulk of the population will match better than that. So..
Im looking for a tight match of the 'fet pair on single 389' and I need two 389s to be matched well also..
If its too difficult or too expensive I guess I could just get 4 170s very tightly matched and then thermally bond them and wrap em up in some polystyrene to keep out the drafts.
Thanks Rob
Dont worry lads, Ive found a supplier out of the US who can tightly match original 2SK170s for me at a very good price.. Ive used him before and hes legit....
None of my 20 off 2sk389 match internally.
Most were between 2% and 7% different in Idss.
NONE matched for 2point and certainly not 4point on the Id vs Vgs curve.
I only have 4 off 2sj109 and none of these match either.
Most were between 2% and 7% different in Idss.
NONE matched for 2point and certainly not 4point on the Id vs Vgs curve.
I only have 4 off 2sj109 and none of these match either.
Hi Andrew
Thanks for your efforts anyways, very much appreciated. Youre a gentleman and a scholar ...
Thanks for your efforts anyways, very much appreciated. Youre a gentleman and a scholar ...
LSK389
Hi Andrew.....
Do you still have some of the LSK389??
I could use 2 pieces as closely matched as you are able to.
Please PM me, if you still have stock.
Best regards 🙂
Hasse !!!
Hi Andrew.....
Do you still have some of the LSK389??
I could use 2 pieces as closely matched as you are able to.
Please PM me, if you still have stock.
Best regards 🙂
Hasse !!!
any GB open for LSK389B or C?
I have LSK170C - if that is of interest.
I have LSK170C - if that is of interest.
Actually I have found em in stock in some euro retailers so no need to get them from overseas, but thanks for the offer.
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- Group Buy: Linear Systems LSK389 / LSK170 JFETs (i.e. Toshiba 2sk389/2sk170 subs)