Hockey Puck SIT 2SK180 by Tokin source NOS

[WBS]

I have a single, orphan 2sk180. I can't decide what to do with it.

 

[Soundhappy]

....I asked if it makes sense to remove the irfp250 and use the sk180 .... in the Mofo?

Great solution ask by email MoFo designer directly on his blog page AudioMaker | DIY Audio Projects & More

 

[sontero]

Great solution ask by email MoFo designer directly on his blog page AudioMaker | DIY Audio Projects & More

more 'than right .... I asked you because, even if you do not know me, I esteem you a lot and I wanted to hear your opinion.
thank you soundhappy

 

[sontero]

I have a single, orphan 2sk180. I can't decide what to do with it.

looking for a mate .... I do not see other solutions...

 

[Soundhappy]

Thanks for kind words Sontero.
Anyways not without circuit modifications :
2SK180 need specialized negative (-) voltage bias circuit for depletion SIT.
PSU voltage is more up ~ +60 V probably.
Choke parameters Henrys and the A current if SiTFo is possible frankly I don't know all details

 

[Nelson Pass]

I have a single, orphan 2sk180. I can't decide what to do with it.

I have one odd, and you are welcome to it - it's in the big TO3 style case.

 

[maxlorenz]

How generous.

BTW, has anybody a good and cheap source for thermal pads for these giants?

The ones I've found have very expensive shipping service: more than the big 19cm*19cm pad...

 

[Soundhappy]

Thermal pads for solid state relay from Electronic Components and Accessories | MPJA.COM
this solution was on AudioMaker video, start time 27:00 Lab Hangout #2
Greetings

 

[maxlorenz]

Thanks.
I'll look for it.

Bet wishes.
M.

 

[Soundhappy]

Bump watanabetomoaki | eBay

 

[Soundhappy]

They are NOS with no replacements on the horizon.
I bought some from Tomoaki, and he is a reliable supplier.

Thanks Mr Pass

watanabetomoaki | eBay

 

[wengtech]

anyone here ever tried "small current high voltage area" with 2sk180?
how does the sound compared with common big current low voltage?
-thanks-

 

[Soundhappy]

Information for Diyers who want buy THF-51S from Watanabetomoaki
watanabetomoaki | eBay
Some days SIT's auction " buy it now " are close then is open again
, please check maybe next day are lucky one or write message about availability
directly into seller contact box Greetings

 

[Soundhappy]

Pras1170 are new seller ( with only 4 feedbacks ) of not verified quality " sand" triodes.
Today we don't know but maybe Diyers write us is genuine stuff or not ?
Tokin SIT | eBay
Please bring Your test conclusion after deal experience.
Yeah probably NOS huge source ! Buy 4 and one is for free and the other used pcs. was tested and are cheaper

 

[Soundhappy]

200 pcs. inside = 100 SE stereo amplifiers

 

[plasnu]

Looks like he has 11400 pcs of THF51S.

 

[monotube2]

anyone here ever tried "small current high voltage area" with 2sk180?
how does the sound compared with common big current low voltage?
-thanks-

I'm interested too

 

[maxlorenz]

Pras1170 are new seller ( with only 4 feedbacks ) of not verified quality " sand" triodes.
Today we don't know but maybe Diyers write us is genuine stuff or not ?
Tokin SIT | eBay
Please bring Your test conclusion after deal experience.
Yeah probably NOS huge source ! Buy 4 and one is for free and the other used pcs. was tested and are cheaper

To whom this may be of interest: I purchased from PRAS1170 four units of THF-51 for my diffamp-TOKIN amp. They seem very OK for me.
He accepts offers BTW.
Cheers,
M.

 

[Soundhappy]

Thank You very much Max for sharing a great constructive spirit

 

[Soundhappy]

anyone here ever tried "small current high voltage area" with 2sk180?
how does the sound compared with common big current low voltage?
-thanks-

Interesting question!
Curves show from original Tokin datasheet is 182 ( without ES ) a 1000 watt's SIT.
Member Jama send me curve traced pairs C and D grade of 2SK180.
This is for near future builds.
You can find bunch of data and SIT modeler software on Mr Rothacher blog

AudioMaker | DIY Audio Projects & More

and video about load line and sweet spot