SIT Nemesis

[nagini262]

Papa told me: the FG-50S and PASS SIT 1 transistor will have the best combine if I connect 32 ohm tap primary with 25VDC at 1A bias
Many thanks..........Papa

 

[banat]

Nagini ,

it is just for your reference

Regards !

 

[nagini262]

Thanks! Using tube buffer is a good idea but I think the tube with output transformer is better

 

[banat]

You`r right ,
just to add , at that specific schematic good 600ohm SE-OPT dedicated for 6C33C tube will do the job .

 

[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 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

Teflon capacitors have small uF value and cost is opposite , Mundorf paper in oil ?
For cheap experiments try and nice quality maybe bi-polar Muse ?
Price = 1 pcs is less 0,50$ only...anyway you build without

http://www.mouser.com/ds/2/293/e-ues-876267.pdf

http://www.mouser.com/ProductDetail...raJlu2/0CDCZpyF%2brykr/wFBr7GKK8WnGrDUIlrjg==

Némésis was exposed by Mr Hiraga in bi-amplified and tri-amplified audio systems.
Look after wideband graph his strong point are medium frequency range

 

[d to the g]

There was a pair of FG-50s on the swap meet here on diyaudio, but I'm sure someone snatched them up by now.

 

[nagini262]

I bought a pair of Tango NN-600-600 for my SIT Nemesis, it will be use as input transformer

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[Zen Mod]

I'm glad for you

what was the price , if you don't mind ?

 

[nagini262]

About 680USD (included shipping from Japan to Viet Nam)

 

[Zen Mod]

well , just for curiosity sake , do you mind measuring Rdc and L of full primary and full secondary ?

TIA

 

[nagini262]

The Rdc is about 18 ohm per coil (150 ohm), unfortunately that I have no Henry meter so I can't..., you can get more detail in the specification below: http://www.tubebooks.org/file_downloads/tango_tamura/Tango_NN-600-600.pdf

 

[Zen Mod]

thank you !

 

[nagini262]

My father have a vacation at Canada so he bought for me a Plitron low noise transformer. He will bring it to me when he comeback to Viet Nam in the end of October

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[jamahamvui1978]

" I have tried the Sony 2SK82's, but I was a little disappointed as the transconductance was low and they did not develop much voltage gain" - NP, SIT Nemesis articles. http://www.firstwatt.com/pdf/art_sit_nemesis.pdf
I would like to know if we could use 2SK180 in SIT Amp.
Tks!

 

[Nelson Pass]

I think so. I have not been able to find the time yet to build them up.

 

[jamahamvui1978]

Thanks Mr. NP!
( OMG !!!!! it is so shocked when I received NP' reply )

I'll try SIT amp with 2sk180. I want to know if we need to change some things eg: B+, OPT, Rg ...

 

[jamahamvui1978]

My wk = xforms for my SIT Nemesis

 

[Zen Mod]

 

[jamahamvui1978]

We all love hard_core

 

[aoc]

Wow!

My wk = xforms for my SIT Nemesis

Alex