Sony SITs - 2SK82 E Rank With 2SJ28 F Rank - diyAudio
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Old 12th February 2014, 12:51 AM   #1
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Default Sony SITs - 2SK82 E Rank With 2SJ28 F Rank

Our friends at circuitdiy.com are running low on the 2SJ28 E Rank P channel
VFETs (my fault apparently), but they do have a supply of the F Rank
parts, and they sent me some samples to see how well they will work when
paired with the 2SK82 E Rank (which is still in supply).

I put them in the SIT amplifier circuit which was displayed at BAF 2013 and
also another similar amplifier, and apart from a slight difference in the bias
voltage, there was virtually no performance difference.

Actually, the F Rank P channel gave slightly better results, but this is within
experimental error.

So you can safely purchase these parts and put them in push-pull VFET
(SIT) amplifiers.

I am currently preparing the article on two versions of the Common-Source
amplifier shown at BAF and am also working up at least one Common-Drain version.

I hope to have it out in a week or so for you.

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Old 12th February 2014, 12:54 AM   #2
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Thank you very much Mr. Pass. I think many of us are looking forward
to your article.

Cheers,
Dennis
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Old 12th February 2014, 02:15 AM   #3
flg is offline flg  United States
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Old 12th February 2014, 06:01 AM   #4
WalterW is offline WalterW  Netherlands
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Wow, Thank you Mr. Pass !

That means my 5th Pass amp will be build
I have 4 pairs of these Sony SITs...
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Old 12th February 2014, 08:54 AM   #5
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With interesting Sony CS XFRMR amplifier topology this article
be come instant hit

That is great news

Thank You very much Mr Pass
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Old 12th February 2014, 10:26 AM   #6
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what about 2sk60 and 2sj18?
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Old 12th February 2014, 10:52 AM   #7
Zen Mod is offline Zen Mod  Serbia
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pretty much same logic
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Old 12th February 2014, 05:30 PM   #8
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Quote:
Originally Posted by marconi118 View Post
what about 2sk60 and 2sj18?
Do you have a source for them?

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Old 12th February 2014, 08:25 PM   #9
dsdjoy is offline dsdjoy  Germany
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Quote:
Originally Posted by Nelson Pass View Post
I am currently preparing the article on two versions of the Common-Source
amplifier shown at BAF and am also working up at least one Common-Drain version.

I hope to have it out in a week or so for you.


Thank you, sounds great !
I wanted to build a smaller version of the Pass Sony VFET Anniversary amp and have also build up a nice stash of 2sj28/2sk82 KE-33 grade recently.

May I please ask for a Common-Drain version with variable, adjustable number of parallel output pairs ?

Last edited by dsdjoy; 12th February 2014 at 08:29 PM.
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Old 12th February 2014, 08:44 PM   #10
Zen Mod is offline Zen Mod  Serbia
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another Wakoo German

are you, in any way , related to our GE Generg ?



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