but since I had tested all the vfets and sorted them by Vgs, it was trivial to match them. You can see the number on the parts.
Wow. Hats off to you, sir.
I wonder... do you think a VFET-based preamp is inherently kind of a silly idea? Maybe if for no other reason than availability haha. I know Yamaha tried it back in the day.
Also, I'm not sure of the exact specs of my Pioneer Exclusive C3 preamp, but one site shows that it has a 'maximum' output of 15V, but is rated at 2V (50kohm impedance). Not sure if that's accurate (I mean, it does have 140V rails), but in my experience it does seem to have plenty of gain, so it may actually pair nicely with this VFET design.
Just to make sure I've got this right...
There will be a complete kit for both versions (differing only in polarity) available from the store -- including the VFETs and chassis?
I've been looking at picking up an old VFET-based receiver (B1/B2 or TA-N88), but sounds like this may be an even better route?!
Yes. But quantity is limited and there will never be another offering of this.
SO... buy the old Vfet receiver as well and salvage the parts, as there will also be a version for those parts.
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I’m waxing here but I think Sony made another rarer? version of Vfet used in phono stages etc...
Perhaps you are remembering the 2SK63 or 2SK79 small signal VFets used in the phono sections of the Sony TA-4650 and TA-5650 integrated amplifiers?
Hmmm.... I'm thinking I shouldn't return this to it's rightful owner .... ?
Looks very at home among the M2Xs....
Sounds absolutely fantastic—DAC or vinyl. Plenty of sweetness from the monkey coffins (92 db). Definitely the quietest amp I've ever had in my system—as in—absolutely nothing can be heard...ear to cones. Yay Nelson! Yay Mark! Can't wait to build one.
Looks very at home among the M2Xs....
Sounds absolutely fantastic—DAC or vinyl. Plenty of sweetness from the monkey coffins (92 db). Definitely the quietest amp I've ever had in my system—as in—absolutely nothing can be heard...ear to cones. Yay Nelson! Yay Mark! Can't wait to build one.
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Perhaps you are remembering the 2SK63 or 2SK79 small signal VFets used in the phono sections of the Sony TA-4650 and TA-5650 integrated amplifiers?
Didn’t Yamaha use small signal vfets for the B1/C1 combo?
The VFET information page on the store is now live:
DIY Sony VFET Store Information Page – diyAudio Store
It (hopefully!) contains everything you need to know to get a chance to build one. Any omissions are mine, minor updates may be forthcoming. See you April 7th
Many thanks to Nelson, Mark, Jim and Patrick.
DIY Sony VFET Store Information Page – diyAudio Store
It (hopefully!) contains everything you need to know to get a chance to build one. Any omissions are mine, minor updates may be forthcoming. See you April 7th
Many thanks to Nelson, Mark, Jim and Patrick.
Can we buy the chassis only? I mean outside of the lottery?
This, from the FAQ:
Q: Can the chassis (or any other part) be purchased separately?
A: We have made 200 chassis, which is intended to be enough for everyone who buys a kit with VFETs, plus some more for people who already own their own VFETs. If there are any left over after that, they will be listed in the store around July 2021.
Can we buy the chassis only? I mean outside of the lottery?
"Q: Can the chassis (or any other part) be purchased separately?
A: We have made 200 chassis, which is intended to be enough for everyone who buys a kit with VFETs, plus some more for people who already own their own VFETs. If there are any left over after that, they will be listed in the store around July 2021."
codyt's always quick!!
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