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#vfet

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Jaaha, pitkäaikainen kaiutin haave toteutettu. Niinku kuvasta saattaa havaita (ei kerro puoliakaan totuudesta) nämä on ISOT. Kuulemma amis kaiuttimet 🙄mun mielestä komiat ku mitkä. Joten tervetuloa @johannamalkia kotiin järkyttymään 😂😘 #yamahans1000m #sony #vfet #vintage #hifi

in the early 1970s, Sony Japan released an extraordinary line of amplifiers, their V-Fet series; built around a rare and expensively made transistor type. They sound incredible still, linear and musical like the best tube amps and with vanishingly low distortion... this one has been upgraded with all capacitors and diodes improved, resistors matched... better performance than pretty much anything available today ✨ #vfet

#vfet sadly some work has to be done...

#Repost @california_audiophool ・・・
Sony VFET output transistors. Not a mosfet as many think, but a special type of jfet with triode tube like I-V characteristics. This pic is of my personal stash which is probably one of the larger collections in the world. Most you find for sale are fakes. If the case looks new, or even NOS, or the font isnt exactly right, beware
Note in "HA-56", for example, that "HA" means production run code, next number is breakdown rank 5 and last number is related to pinch off gate voltage. Pinch off rank 5 means about Vgs_off = -Vpinch ~ -17V .
.
#sony #vfet #fet #transistor #electronics #audiokarma #diyaudio #hifi #vinyl #sansui #marantz #pioneer #yamaha #instahifi @instahifi

Dagens vinyl: Sgt. Peppers Lonely Hearts Club Band - THE BEATLES #vinyl #thebeatles #sgtpepper #yamahaB2 #vfet #denonDL103 #onkyoP303

#vfet #diyaudio #nelsonpass "The board prototype for sony vfet version 2 amp.

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#Repost @california_audiophool ・・・
Sony VFET output transistors. Not a mosfet as many think, but a special type of jfet with triode tube like I-V characteristics. This pic is of my personal stash which is probably one of the larger collections in the world. Most you find for sale are fakes. If the case looks new, or even NOS, or the font isnt exactly right, beware
Note in "HA-56", for example, that "HA" means production run code, next number is breakdown rank 5 and last number is related to pinch off gate voltage. Pinch off rank 5 means about Vgs_off = -Vpinch ~ -17V .
.
#sony #vfet #fet #transistor #electronics #audiokarma #diyaudio #hifi #vinyl #sansui #marantz #pioneer #yamaha #instahifi @instahifi

Sony VFET output transistors. Not a mosfet as many think, but a special type of jfet with triode tube like I-V characteristics. This pic is of my personal stash which is probably one of the larger collections in the world. Most you find for sale are fakes. If the case looks new, or even NOS, or the font isnt exactly right, beware
Note in "HA-56", for example, that "HA" means production run code, next number is breakdown rank 5 and last number is related to pinch off gate voltage. Pinch off rank 5 means about Vgs_off = -Vpinch ~ -17V .
.
#sony #vfet #fet #transistor #electronics #audiokarma #diyaudio #hifi #vinyl #sansui #marantz #pioneer #yamaha #instahifi @instahifi

Sony TA-5650 VFETs matched up today.

People usually match up only by sony's 'rank' printed on the device (eg these are all rank '56'. The first number I think is related to breakdown voltage and second is related to pinch-off voltage. The letters 'HA' before that are just production run identification) but I found that to be not great compared to measuring pinch-off voltage by yourself. Biases up much easier now and transistors will be 'working' more evenly.

And usually completely ignored by restorers of these particular units, I found the current curves of the sony vfets to be very different from device to device and a strategy for matching by output characteristics beyond pinch-off voltage is desirable IMO. But a lot of work and needs two variable DC sources (your typical cheapie curve tracer will not do this properly in my experience). #sony
#vfet
#TA-5650
#electronics
#restoration
#hifi
#audiokarma
#audio
#vintageaudio
#Vintage

Behold the holiest grail of all: Yamaha B-2 VFET (SIT) power amplifier from 1978 🙏🏽 #Yamaha #B-2 #vintageyamaha #vintageaudio #vintageaudiogear #VFET #Japan #vumeters

in the early 1970s, Sony Japan released an extraordinary line of amplifiers, their V-Fet series; built around a rare and expensively made transistor type. They sound incredible still, linear and musical like the best tube amps and with vanishingly low distortion... this one has been upgraded with all capacitors and diodes improved, resistors matched... better performance than pretty much anything available today ✨ #vfet

Jaaha, pitkäaikainen kaiutin haave toteutettu. Niinku kuvasta saattaa havaita (ei kerro puoliakaan totuudesta) nämä on ISOT. Kuulemma amis kaiuttimet 🙄mun mielestä komiat ku mitkä. Joten tervetuloa @johannamalkia kotiin järkyttymään 😂😘 #yamahans1000m #sony #vfet #vintage #hifi

Sony TAE-8450 preamp and Sony TAN-8550 V-FET power amplifier beautifully restored by yours truly.
I have delivered them this past weekend, but the memory of how incredible they perform will live with me for a long time.
#sonyamp #sonyamplifier #audiophile #vintage #audio #vintageaudio #vintagegear #preamp #amplifier #vfet #audioporn #want

They are here!!! Sony V-Fet amp, matching preamp, and a third amp which looks like a V-Fet but isn't :)
#sony #amp #preamp #Vfet #awesome #vintageaudio

#vfet #diyaudio #nelsonpass "sony vfet 2 pcp prototype playing #billfrisell

#vfet #diyaudio #nelsonpass "The board prototype for sony vfet version 2 amp.

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