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2sk77b and 2sk180 new projects
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Old 25th January 2017, 04:30 AM   #21
delecoy is offline delecoy  United States
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Hi Mr. Pass,

If looking to purchase 2SK180s, should we aim for a specific rank? Will it be relevant?

Thank you much,

Cody

Quote:
Originally Posted by Nelson Pass View Post
I purchased 2SK180's from Sun-Pec.com

They delivered as promised and I'm pretty sure they are genuine, but I haven't
had the chance to play with them yet.

Datasheets360.com - Electronic Component Search | Datasheet and Supplier Information has the spec on it.

2SK77B's, I don't know where you'll find them unless you know the guy who
owns Digital Do Main. I got a few as a gift.

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Old 25th January 2017, 05:20 PM   #22
Nelson Pass is offline Nelson Pass  United States
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2sk77b and 2sk180 new projects
I don't know. I haven't had enough time to investigate further,
so they "sit" on the shelf for the time being.
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Old 25th January 2017, 11:48 PM   #23
res07njc is online now res07njc  United States
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In the past, some kind DIY'er posted a pic of collected SK180 curves. From what I can tell, the C and D ranks seem to be more tightly grouped with regard to curves and higher Vgs/pinch voltage (-3 to -4V range) vs. the non-graded 180's which were more sporadic or random. Relevant? Dunno... not enough experience here, other than to say non-graded 180's would probably benefit from being match paired.

Last edited by res07njc; 25th January 2017 at 11:57 PM.
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Old 26th January 2017, 01:30 AM   #24
delecoy is offline delecoy  United States
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Thank you Mr. Pass!

Thank you res07njc!

I'll aim for C and D, and assume that they'll land in an interesting circuit regardless
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Old 26th January 2017, 02:00 AM   #25
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by res07njc View Post
In the past, some kind DIY'er posted a pic of collected SK180 curves.
Yes was made by Jama for example. C or D are ok but X, Y, Z probably strange. More vintage series Tokin was nice as well
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Old 1st February 2017, 06:41 PM   #26
Soundhappy is offline Soundhappy  France
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I remember Mr. Pass at BAF2015 speak about Maxonic hi-fi company who used SIT's transistors.

http://www.src-el-main.com/maxonic/c...ew/sd-016e.pdf

What we see is a hybrid circuits with 2SK182 ES with vacuum tubes stage inside
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Old 1st February 2017, 07:01 PM   #27
Soundhappy is offline Soundhappy  France
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Interesting
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Old 1st February 2017, 08:51 PM   #28
Zen Mod is offline Zen Mod  Serbia
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2sk77b and 2sk180 new projects
when I grow up , I wanna be nutz as Japanese amp builder

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Old 1st February 2017, 09:30 PM   #29
res07njc is online now res07njc  United States
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when I grow up , I wanna be nutz as Japanese amp builder

first must have great affair with 6bm8 before reaching mountain top.
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Old 1st February 2017, 09:33 PM   #30
Soundhappy is offline Soundhappy  France
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when I grow up , I wanna be nutz as Japanese amp builder

Sci-fi Hi-fi Experimenters
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