I'm picking this project up again after a few years and I'm still stuck on the same JFET matching question.
Many years ago, I bought 2 matched pairs of 2SK170BLs. When they're installed, how are the paired together?
In other words, if I have matched pair "A" and pair "B," are they installed like this:
Or should they be attached like this:
From AndrewT's comment here, I'd imagine it is the former image.
Many years ago, I bought 2 matched pairs of 2SK170BLs. When they're installed, how are the paired together?
In other words, if I have matched pair "A" and pair "B," are they installed like this:
Or should they be attached like this:
From AndrewT's comment here, I'd imagine it is the former image.
I probably should have asked this in the build thread, my bad.
I think the answer is "yes" based on the answer here: Mezmerize DCB1 Building Thread
I think the answer is "yes" based on the answer here: Mezmerize DCB1 Building Thread
I have a matched quad for the signal section, but does anyone know of a more readily available replacement for the six 2SK170's for the PSU section (it seems like the spec tolerances are less stringent for those)? Maybe someone at the DIYAudioStore could help me get an unmatched set of the LSK170's?
This might be another option, but those Fairchild PF5102's seem to be not that easy to get either.
This might be another option, but those Fairchild PF5102's seem to be not that easy to get either.
or there's still some available @ Genuine Toshiba 2SK170BL Low Noise N-Channel JFET.
Or even cheaper the LSK equivalent here
LSK170B-TO-92 | LINEAR SYSTEMS | NAC Semi
LSK170B-TO-92 | LINEAR SYSTEMS | NAC Semi
For keeping with a JFET theme, this design has proved quite popular: Ultra Folded Simplistic Phono (UFSP)
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