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SIT Nemesis
SIT Nemesis
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Old 29th May 2016, 02:50 PM   #11
eduard is offline eduard  Netherlands
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Hello,
At that time i wanted to build that amp but did not have high effeciency drivers so after buying the power transistors i did stop buying parts.
But i used the choke from the Nemesis in my Hiraga 30 watt amp.
I think at that time there were some very good diy amps on the market. No internet just books, magazines, real shops and real people. No avatars.
No fake parts on ebay, shinkoh tantal resistors for 1,25$ ( but that was considered expensive for a resistor at that time), no paper, silver, gold, oil, cryogenic processed caps just some caps that were better than others.
Greetings, Eduard
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Old 29th May 2016, 03:19 PM   #12
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by WalterW View Post
"+ The first: a great man gave to me one pair of PASS SIT 1 VFET transistor."

hahaha, that can be only one great man, we all know
Or MR or ZM
Treasure Pass Sit-1 that need smart Mr Rothacher heat sink solution with screws adapters so Nagini can play more fun game
and compare sound from other topologys as well maybe ?

Thanks photos courtesy by Audiohobby.com
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Old 29th May 2016, 04:07 PM   #13
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by eduard View Post
Hello,
At that time i wanted to build that amp but did not have high effeciency drivers so after buying the power transistors i did stop buying parts.
But i used the choke from the Nemesis in my Hiraga 30 watt amp.
I think at that time there were some very good diy amps on the market. No internet just books, magazines, real shops and real people. No avatars.
No fake parts on ebay, shinkoh tantal resistors for 1,25$ ( but that was considered expensive for a resistor at that time), no paper, silver, gold, oil, cryogenic processed caps just some caps that were better than others.
Greetings, Eduard
@ Eduard
Yes " La Maison de L'Audiophile " is sadly just souvenirs today but we have happyly DiyAudio Forum
and for real meetings "Melaudia" folks and European Triode Festival and possibly we can meet Mr Hiraga himself.

Many amplifiers builds make live this legend and Némésis Pass Sit-1 is the very great one.
Yeah crazy about high-fidelity in healthy way

@ Nagini262
Good luck in your build(s)

Best regards
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Old 29th May 2016, 11:24 PM   #14
nagini262 is offline nagini262  Viet Nam
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@soundhappy: thanks for your ideas! I was think I will build the PASS SIT 1 transistors with output capacitors (try to find Rubycon Black Gate 10000uF or Audio Note KaiSei 10000uF/63VDC) but now I have FG-50S so I will build SIT Nemesis
I will choose the best parts for this amp:
+ Plitron transformer, Audio Note KaiSei capacitor, Lundahl choke and Cree SiC rectifier in the power supply.
+ I apply ZEN V3 active regulation too
+ Replace input capacitor with 600:600 input transformer
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Old 30th May 2016, 09:39 AM   #15
nicoch58 is offline nicoch58  Europe
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Santa Claus love you
really strange don't know Tango !!

Last edited by nicoch58; 30th May 2016 at 09:41 AM.
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Old 4th June 2016, 03:45 PM   #16
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by nagini262 View Post
@soundhappy:......

+ Replace input capacitor with 600:600 input transformer

With input transformer you give them new name ? Iron Némésis ?
Have fun Nagini262 i stay in tune for sound descriptions :
silicon carbide SIT´s and Tango's together nice & rare combo

SIT Nemesis
SIT Nemesis
SIT Nemesis
SIT Nemesis
SIT Nemesis
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Old 4th June 2016, 09:44 PM   #17
Soundhappy is offline Soundhappy  France
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Probably you know schematic of Sit Nemesis revisiting published in Linear Audio Magazine ?

https://linearaudio.net/article-detail/2130

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Old 5th June 2016, 12:29 AM   #18
nagini262 is offline nagini262  Viet Nam
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Thanks soundhappy! I built Arch Nemesis and Ironamp, both have a very good sound and I know the quality of parts are very important so I will get best parts for this amp.
The name Ironamp became cause: input transformer, VFET TO-3 case and output transformer. The PASS SIT 1 with TO-247 case so I think it's just some modify from origin SIT Nemesis for better sound because I have no best input capacitor. My target for input transformer is Tango NN-6 or NN-600-600 with Permalloy core
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Old 5th June 2016, 08:43 AM   #19
Soundhappy is offline Soundhappy  France
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Great Nagini262 !

What your the very best resistors choice for this extraordinary amplifier ?

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Old 5th June 2016, 11:57 PM   #20
nagini262 is offline nagini262  Viet Nam
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There is no any resistor on the signal in this amp, it's only in the active regulation ZEN V3 and TL 431 bias power supply, maybe I will use Amtrans AMRG or z-foil but I think it's not necessary to using z-foil
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