Haha 😀 First Némésis was inspired by Western Electric 25B amplifier
https://www.westernelectric.com/static/library/specifications/amplifiers/25b-amplifier.pdf
Can You show us Tokin version photos how minimal number components inside is ? Thanks in advance
Some of this 1920 WE amps work despite a century age is incredible.
Big SIT transistors can do longer time 😉
Western Electric 7A
https://www.westernelectric.com/static/library/specifications/amplifiers/7.pdf
Western Electric 7 A part 8
Westrrn Electric 7A part2
nothing very different than the papa sitnemesis, parts are
one pair of input cap grid choke instead of transformer input ( matter of taste)
a pair of Thf51S instead of the semisouth VFET
a pair of TANGO output transformer
a pair of TL431 bias power supply
a pair of CLC 100K 10MH 100K for the power supply
and that's it..
one pair of input cap grid choke instead of transformer input ( matter of taste)
a pair of Thf51S instead of the semisouth VFET
a pair of TANGO output transformer
a pair of TL431 bias power supply
a pair of CLC 100K 10MH 100K for the power supply
and that's it..
Thanks Juanitox for the show 🙂
I the past I was in contact with " Melaudia " member who have Tango OT pair for Némésis at 1K5 € price for sale.
Well I don't buy them and spend on more triode transistors collecting
I the past I was in contact with " Melaudia " member who have Tango OT pair for Némésis at 1K5 € price for sale.
Well I don't buy them and spend on more triode transistors collecting
Ancestors of the modern high fidelity play charming acoustic music
6sn7 前級+WESTERN ELECTRIC 25B(205D)+LOWTHER AUDIOVECTOR
https://www.westernelectric.com/static/library/specifications/tubes/205D.pdf
https://www.westernelectric.com/static/library/specifications/tubes/216A.pdf
WE 7A ( see amp inside picture ) similar but not the same to Mr. Pass CSX1 vfet.
WE 25B make me think back to Mr.Rothatcher " Iron Amp "
Iron Amp video
🙂
6sn7 前級+WESTERN ELECTRIC 25B(205D)+LOWTHER AUDIOVECTOR
https://www.westernelectric.com/static/library/specifications/tubes/205D.pdf
https://www.westernelectric.com/static/library/specifications/tubes/216A.pdf
WE 7A ( see amp inside picture ) similar but not the same to Mr. Pass CSX1 vfet.
WE 25B make me think back to Mr.Rothatcher " Iron Amp "
Iron Amp video
🙂
Attachments
Attachments
@ Jan.Didden
Yes we can rather name this "amplification stage with autoformer output".
In "L'Audiophile" nr 41 edition from 1987 was Némésis show compared old (ancien) generic output transformer
performance with updated Tango FG50S version , a much better one 🙂
Mr. Hiraga says without feedback this amp is excellent for mid-highs in bi-amplified systems.
He use metaphores about audio and amplifiers
" Distiled water is chemicaly pure but many peoples appreciate natural water directly from the source "
" Contemporary producers make them with complex circuits, small size, little weight and cold
but some peoples find music is more beautyful from minimalistic circuits, bigger hardware, heavy and who run hot "
Yes we can rather name this "amplification stage with autoformer output".
In "L'Audiophile" nr 41 edition from 1987 was Némésis show compared old (ancien) generic output transformer
performance with updated Tango FG50S version , a much better one 🙂
Mr. Hiraga says without feedback this amp is excellent for mid-highs in bi-amplified systems.
He use metaphores about audio and amplifiers
" Distiled water is chemicaly pure but many peoples appreciate natural water directly from the source "
" Contemporary producers make them with complex circuits, small size, little weight and cold
but some peoples find music is more beautyful from minimalistic circuits, bigger hardware, heavy and who run hot "
Attachments
I finished the amp with very simple circuit. The signal path through only two parts (the vfet 2SK180 and the OPT Tango FG-50S).
The self bias with the big 1 Ohm resistor connect to the source pin and the small 47K resistor connect to the gate in to ground. So, my amp circuit have only 4 parts: 1 vfet, 2 resistors and 1 OPT.
There is only one single main power supply (LCLC filter - without regulation), the amp running with Vds = 25Vdc / Id = 2.9A.
The OPT connected 1:1 ratio
I tried to use the red copper and Arctic silver 5 thermal grease so the temp on the vfet only 42 degrees after 80 minutes warm up.
Some images and hope all of you love it....
Thanks!🙄
P/S: I will match this amp with my ATC SCM7 V3 loudspeakers and make some review later...
The self bias with the big 1 Ohm resistor connect to the source pin and the small 47K resistor connect to the gate in to ground. So, my amp circuit have only 4 parts: 1 vfet, 2 resistors and 1 OPT.
There is only one single main power supply (LCLC filter - without regulation), the amp running with Vds = 25Vdc / Id = 2.9A.
The OPT connected 1:1 ratio
I tried to use the red copper and Arctic silver 5 thermal grease so the temp on the vfet only 42 degrees after 80 minutes warm up.
Some images and hope all of you love it....
Thanks!🙄
P/S: I will match this amp with my ATC SCM7 V3 loudspeakers and make some review later...
great ! i run mine at different ppoint 60V 1.4A , don't you think that 2.9A can saturate the Tango OPT 🙂 ?
Tango FG-50S connect 16 Ohm will have 4A
with Vds = 25Vdc / Id = 2.9A the 2sk180 will only dissipate 72.5 watt
don't you think to push it a bit into 150 watts or so, considering 2sk180 could handle 300 watt of power?
maybe with Vds = 36Vdc / Id = 3.5A or so...??
don't you think to push it a bit into 150 watts or so, considering 2sk180 could handle 300 watt of power?
maybe with Vds = 36Vdc / Id = 3.5A or so...??
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