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Group Buy: Linear Systems LSK389 / LSK170 JFETs (i.e. Toshiba 2sk389/2sk170 subs)

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C

coloradosound

Member
Joined 2005
Thanks for all the work Marc!
I have been thinking about trying to complement these
with 2SJ74's and I know there has been some discussion in other
threads, but as you recently stated that it is hard to pass
judgement, I think they may work allright together.
Anybody tried complementing these with the Toshibas yet?
Also I noticed Ampslab at least has listed the 2SJ74 as well
as some vendors on eBay. I heard there are a lot of counterfeits
out there but was wondering about experience from vendors
such as audiotek168 from Taipei, Taiwan?
 
luvdunhill

luvdunhill

Member
Joined 2006
coloradosound said:
Thanks for all the work Marc!
I have been thinking about trying to complement these
with 2SJ74's and I know there has been some discussion in other
threads, but as you recently stated that it is hard to pass
judgement, I think they may work allright together.
Anybody tried complementing these with the Toshibas yet?
Also I noticed Ampslab at least has listed the 2SJ74 as well
as some vendors on eBay. I heard there are a lot of counterfeits
out there but was wondering about experience from vendors
such as audiotek168 from Taipei, Taiwan?
Click to expand...

well, I've purchased a number of 2SJ74 from our own Ruach, but I know for a fact his supply is dwindling. Personally, that's where I'd start. He was recommended to me by people here I trust, so ... If you'd rather go elsewhere, you can pay premium and buy from bdent.com. I realize they are more expensive, but it's not all that bad. IMHO, much better than ordering from Ebay.

I don't have plans to pair the LSK170 and 2SJ74, as I have stockpiles of both Toshiba parts. I do plan on jumping on the availability of the Linear LSJ74, but it looks like this may not happen until the Toshiba single FETs have been gone for a good while in order to build up demand. That's my guess at least.

The parts are still out there, you just seem to need to know who to ask.
 
S

satoru

Member
Joined 2007
The original 2SK170's Drain and Source are 100% interchangeable. I guess that is true for LSK170, too. Toshiba's 2SK240 is a package of two 2SK170 pasted on the flat surface together. The D/S pins on one of the pair is swapped, by the pin out sheet provided by Toshiba. Have fun!

Regards,
Satoru

Pingrs said:
With LSK170's, are the Drain and Source interchangeable? Makes pcb tracking easier with the flats together in a LTP.

Regards,

Brian.
Click to expand...
 
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