Hi!
F5 is my first diy project and I'm stuck on toshiba jfet. I think I missed the terms "par" and "quad". I ordered :
'' Toshiba 2SJ74 + 2SK170 lab mached quad to 0.03mA and 4mV(10ma range) ''
and I think I got pairs of NN + PP instead of NP + NP (which I need for F5). Please look at the pictures and tell me if the values are ok for the F5?
I know there are xx similar posts but my knowledge about electronics is poor and they do not help me find the answer ....
F5 is my first diy project and I'm stuck on toshiba jfet. I think I missed the terms "par" and "quad". I ordered :
'' Toshiba 2SJ74 + 2SK170 lab mached quad to 0.03mA and 4mV(10ma range) ''
and I think I got pairs of NN + PP instead of NP + NP (which I need for F5). Please look at the pictures and tell me if the values are ok for the F5?
I know there are xx similar posts but my knowledge about electronics is poor and they do not help me find the answer ....
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I'm guessing the 10.xx numbers are the Idss of the parts. You'll be fine.
Just take one from each bag to make your NP pairs.
Just take one from each bag to make your NP pairs.
in fact , they're perfect for F5 , if 10xx numbers are Idss , and there is no logic that they aren't
it is idss, the question is in fact related to Vds (numbers below) on a plastic bag
you lost me there , with Vds (what's Vds anyway , in this context?)
it'll be more like one piece with 10.09mA , another with 10.10mA of Idss
same for other bag
it'll be more like one piece with 10.09mA , another with 10.10mA of Idss
same for other bag
I did not understand ... This is a problem I'm not clear matching ... this is a screenshot from the post with the measurement results (found on this forum), on the screenshot I added my transistors to simplify my question
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The second number is Vgs, not Vds.
He explains it on his eBay page.
That said, Vgs should be zero if Idss is being measured as he states.
I have bought these from him and they work great in a BA3 preamp I am making for a friend. I am just awaiting delivery a balance pot to finish the preamp.
He explains it on his eBay page.
That said, Vgs should be zero if Idss is being measured as he states.
I have bought these from him and they work great in a BA3 preamp I am making for a friend. I am just awaiting delivery a balance pot to finish the preamp.
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I bought some from the same place and the markings threw me off also. I just built an F5 with them and they worked great.
That makes sense. He probably has to serialize the parts numerically since he is testing 30 at a time.
Those numbers are for him to keep them straight in his records.
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