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Replacement For Toshiba 2SK170/2SJ74
Replacement For Toshiba 2SK170/2SJ74
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Old 3rd October 2018, 11:49 AM   #241
Extreme_Boky is offline Extreme_Boky
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... it's actually cheaper to source 2SJ109, then to get 2 X sj74's...
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Old 3rd October 2018, 03:54 PM   #242
Danger Mouse is offline Danger Mouse  Germany
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Originally Posted by Extreme_Boky View Post
Aleph J steers the current through the 2SJ74's... 4.3mA, and 4mA
But it was recommend to use J74`s with Idss of 8mA.
Dont know why but i believe it.


So if i get LSK Dual Jfet with 3mA is way to less and 10ma and more is way to much.


But this is only interesting to stock me some reserves.
Or make for fun a preamp with smd parts.
At the moment i dont Need any jfets or maybe...
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Old 3rd October 2018, 04:07 PM   #243
Zen Mod is offline Zen Mod  Serbia
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Replacement For Toshiba 2SK170/2SJ74
nothing wrong with using Toshiba V grade and LSK C grade in Aleph J

they're biased through CCS
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Old 3rd October 2018, 10:42 PM   #244
astromo is offline astromo  Australia
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Originally Posted by Zen Mod View Post
nothing wrong with using Toshiba V grade and LSK C grade in Aleph J

they're biased through CCS
For the non-acronym savvy, I take it that by CCS, you mean "Constant Current Source", aka Simple transistor current sources, as discussed at:
Current source - Wikipedia
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Old 3rd October 2018, 11:00 PM   #245
nigelwright7557 is offline nigelwright7557  United Kingdom
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Originally Posted by astromo View Post
For the non-acronym savvy, I take it that by CCS, you mean "Constant Current Source", aka Simple transistor current sources, as discussed at:
Current source - Wikipedia
I prefer the two transistor CCS to other simple methods.
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