I have been eagerly awaiting the Sony VFET part 3 myself. Probably only Nelson can answer the question.
The gift of freebies for greedy boyz is welcome anytime you graciously provide it to us. I wish I could find the picture of Nelson getting in a hurry that Zen showed us at one time. I thoroughly enjoyed the laughed I got from it.
Zen where are you?
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What is part3?
Do you need part1 & 2 or is part3 a new V-FET based amplifier?
Based on Sony V-FET or just V-FET?
I have seen there has been a 40-years Sony V-FET amp with a lot of Sony V-FETs in it?
Is that part3?
Do you need part1 & 2 or is part3 a new V-FET based amplifier?
Based on Sony V-FET or just V-FET?
I have seen there has been a 40-years Sony V-FET amp with a lot of Sony V-FETs in it?
Is that part3?
If the V-Fet story follows its narration, one channel will contain just one V-Fet.
Cheers, Ernst
Cheers, Ernst
That's the Sony 40th anniversary amp and is not a production piece. Only a handful
were built and not many people have heard them.
http://www.firstwatt.com/pdf/art_sony_vfet_40yr.pdf
One member on this forum built a scaled down stereo version.
were built and not many people have heard them.
http://www.firstwatt.com/pdf/art_sony_vfet_40yr.pdf
One member on this forum built a scaled down stereo version.
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"?
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.
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For 90 - 100 dB speakers that many parallel devices are probably overkill…...if impedance stays above 4 ohm.
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).
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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)?
….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)?