2SJ109 is pair of 2SJ74 in one case
2SK389 is pair of 2SK170 in one case
BL is for all mentioned above range of 6-12mA of Idss
in some cases, depending of actual construction, you can use BL in place of GR and other way around ....
so, for proper answer, give more details - where and for what?
2SK389 is pair of 2SK170 in one case
BL is for all mentioned above range of 6-12mA of Idss
in some cases, depending of actual construction, you can use BL in place of GR and other way around ....
so, for proper answer, give more details - where and for what?
In the context of a hypothetical J2 clone build, yes you could use 1 2SK389 in place of 2x 2SK170 but in the context of this thread (long skinny boards by Jeff) ... I was going to say no, not without mangling the legs radically, but after a bit of digging, you might be able to get away with it.
Use the orientation of Q1 in the diagram below for your K389, pins 1 and 7 (2 outside - top and bottom legs) bend behind to the 2 right holes and the other 4 pins are all tied together conveniently so you don't connect the middle pin (NC). If you can follow this by looking at the schematic Jeff posted in the first post (#1) as well as the datasheet for K389 and willing to take all the risks, then nobody can stop you.
Proceed entirely at your own risk
Use the orientation of Q1 in the diagram below for your K389, pins 1 and 7 (2 outside - top and bottom legs) bend behind to the 2 right holes and the other 4 pins are all tied together conveniently so you don't connect the middle pin (NC). If you can follow this by looking at the schematic Jeff posted in the first post (#1) as well as the datasheet for K389 and willing to take all the risks, then nobody can stop you.
Proceed entirely at your own risk
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Thank you very much for such a detailed explanation. I don't know yet if I will build this version of the J2 clone due to the specificity of the chassis needed. I am slowly completing the key parts and after finishing the open projects J2 will be next in the queue.