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Sony VFET Amplifier Part 2
Sony VFET Amplifier Part 2
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Old 16th April 2019, 03:23 PM   #3871
MEPER is offline MEPER  Denmark
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Ok....so that is where the picture comes from. 6A bias and regulated supply. If we build that amp…...what to build next? …...that would be "The End"?
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Old 16th April 2019, 04:47 PM   #3872
Zen Mod is offline Zen Mod  Serbia
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Sony VFET Amplifier Part 2
naah.....

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Old 16th April 2019, 10:10 PM   #3873
cjfrbw is offline cjfrbw  United States
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Originally Posted by MEPER View Post
So.....this is not part3?
Maybe as mono blocks?

Is it an amp that can be purchased today?
Or was it just a kind of "demo-amp" to celebrate Sony V-FET?
If someone has it......how does it sound?
Like a SE Triode amp just with a lot more power and bass control?
I heard the monster Pass VFET at California Audio Show a few years ago and spent a good bit of time in the room (Sony Speakers and exhibit).

It wasn't tubey. More like ultra clean --non- solid state-- solid state. VFET brief but sweet, deep tone and a great listening experience with the Sony speakers. More devices may not serve quite as well as fewer devices, but still a masterful sound. I thought I would like to have heard it with a directly heated triode preamp in line.

My Yamaha B2 and the Sony 8550 have a more OTL directly heated triode type sound, but again, not strictly comparable.

Last edited by cjfrbw; 16th April 2019 at 10:13 PM.
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Old 16th April 2019, 10:23 PM   #3874
MEPER is offline MEPER  Denmark
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For 90 - 100 dB speakers that many parallel devices are probably overkill…...if impedance stays above 4 ohm.
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Old 17th April 2019, 04:20 AM   #3875
WBS is offline WBS  United States
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Sony VFET Amplifier Part 2
Yup...
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Old 17th April 2019, 07:24 PM   #3876
Itsmee is offline Itsmee  England
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Sony VFET Amplifier Part 2
I'd bet you'd still like to own one
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Old 17th April 2019, 09:13 PM   #3877
cjfrbw is offline cjfrbw  United States
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I'd bet you'd still like to own one
Monster amps aren't my thing, even VFET. However, I do wonder who got ahold of those limited production huge VFET amps, and I wonder if anybody even listens to them in a system on a regular basis.

I am luddite enough from the era that 25 watts of class A push pull seems to be a lot of power, rather than the current notion that it is just squeaking by.

When I play my Yamaha B2 louder than I can stand with my 89 db or so crossover-less panels, the meters seldom if ever bob above the 10 to 15 watt range. I know the meters are not accurate, but the word is they tend to err on the side of showing more power than is actually being dissipated by a factor of 50 to 100 percent (because they are for visual excitement as much as visible measurement).

Last edited by cjfrbw; 17th April 2019 at 09:16 PM.
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Old 17th April 2019, 09:26 PM   #3878
Itsmee is offline Itsmee  England
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Sony VFET Amplifier Part 2
Small Papa amps are powerful enough for me too, I don't want one either
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Old 18th April 2019, 08:43 AM   #3879
MEPER is offline MEPER  Denmark
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Do you think Papa himself has one at his private home?
….or just the smaller FW amps?
Has there ever been a Riaa project in this forum (I know off topic….but I was thinking of all the turntables there are around…..I remember that Papa has a lot…..and he probably use some kind of Riaa…...maybe a tube based…...or probably SK170 based…...or opamp based)?
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Old 18th April 2019, 10:18 AM   #3880
cjfrbw is offline cjfrbw  United States
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I think he made five of them. Maybe he can chime in and resolve the mystery of the "Monster VFET Amps" and who got a hold of them. I would imagine at least one is in the hands of SONY.
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