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Hockey Puck SIT 2SK180 by Tokin source NOS
Hockey Puck SIT 2SK180 by Tokin source NOS
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Old 13th August 2019, 02:29 PM   #161
marconi118 is offline marconi118  Germany
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Quote:
Originally Posted by Nelson Pass View Post
At $1 each in 100 lot.....
Whare can-I order 100pieces for 100$?

Watanabetomoaki is a diyaudio user? or on ebay or whereelse?
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Old 13th August 2019, 02:49 PM   #162
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Hockey Puck SIT 2SK180 by Tokin source NOS
link in post #159 , then click on "see other items"

yup , ebay
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Old 13th August 2019, 09:28 PM   #163
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by Zen Mod View Post
just curious - how many SITs you have stashed , and which ones ?
4 curve traced pairs and + THF-51 , 2SK182 ES
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Old 14th August 2019, 01:25 PM   #164
plasnu is offline plasnu  United States
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Originally Posted by Soundhappy View Post
4 curve traced pairs and + THF-51 , 2SK182 ES
I measured 182ES from Watanabe-san at various operation points. Very well matched.

LTSPICE based on my measurement. (measured 15-25V range only)

*--------------------------------------------------
*2SK182_Watanabe
*GENERATED BY SIT MODELER @ AUDIOHOBBY.COM
*MODEL RANGE: 30V, 4A
*--------------------------------------------------
.SUBCKT 2SK182_Watanabe D G S ; Drain Gate Source
+ PARAMS: MU=22 X=1 K=0.9 N=0.63 VCT=1.18 RG=2MEG
*--------------------------------------------------
B1 D S I=K*PWR(URAMP((V(G,S)+VCT)+(N*LN(V(D,S))+(V(D,S)/MU))),X)
*FOR MULTISIM COMMENT OUT ABOVE LINE (*) AND UNCOMMENT NEXT LINE
*B1 D S I=K*PWR(MAX((V(G,S)+VCT)+(N*LN(V(D,S))+(V(D,S)/MU)),0),X)
R1 G S {RG}
CGS G S 2500P
CGD G D 5000P
CDS G S 500P
.ENDS 2SK182_Watanabe
*--------------------------------------------------

Last edited by plasnu; 14th August 2019 at 01:41 PM.
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Old 15th August 2019, 12:39 AM   #165
juanitox is offline juanitox  France
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I have received one pair of 2sk82 from him and it was not well matched , one needs 4,5v and the other 5v to get 1.2amp 🤔
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Old 15th August 2019, 07:00 AM   #166
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Hockey Puck SIT 2SK180 by Tokin source NOS
if biasing network is able to cover both values , pretty much irrelevant** ; example - in SissySIT circuit - I don't care to have two identical SITs , just need to have them in allowable voltage window

**except in case that they were declared "matched"
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Old 16th August 2019, 03:05 PM   #167
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by plasnu View Post
I measured 182ES from Watanabe-san at various operation points. Very well matched.

LTSPICE based on my measurement. (measured 15-25V range only)

*--------------------------------------------------
*2SK182_Watanabe
*GENERATED BY SIT MODELER @ AUDIOHOBBY.COM
..
Thanks Plasnu for sharing Best regards
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Old 16th August 2019, 03:31 PM   #168
maxlorenz is offline maxlorenz  Chile
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What would be the interest for custom made ceramic insulators for 2SK180?

I asked a vendor about it and I am waiting for the answer.

What is the "type" of the big encapsulation again?

Cheers,
M.
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Old 19th August 2019, 09:35 PM   #169
Soundhappy is offline Soundhappy  France
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@ Maxlorenz

Conrad have bunch of Kerafol Keratherm products at good prices Suchergebnisse
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Old Yesterday, 12:35 AM   #170
plasnu is offline plasnu  United States
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Soundhappy, you're welcome.

maxlorenz, I was studying the thermal resistance of Tokin SIT.

2SK180 (Pt 300W Tj 150C), θj-c is 0.42C/W ((150-25)/300).
182ES, 0.25C/W.
SONY 2SK82, 1C/W.

It seems the case temp of Tokin can be much higher than regular FET, so the difference of C/W between Keratherm and Ceramic for this size of FET would not be a serious issue, I guess. Have you calculate the difference?
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