French don't eat grasshoppers but frogs and
Classic is bread with cheese and little glass of wine with grasshoppers singing at the garden
Back to the topic new article about Sony CES 2014 with Pass Labs inside :
CES 2014 Coverage | Ultra High-End Audio and Home Theater Review
Have fun
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Just discovered beauty of vintage transistors
Transistor Museum Construction Projects Point Contact Germanium Western Electric Vintage Historic Semiconductors Photos Alloy Junction Oral History
before we see nano transistor with your dream sound.
Wait patiently if Papa be come back with schematic for Diyers
Greetings
Transistor Museum Construction Projects Point Contact Germanium Western Electric Vintage Historic Semiconductors Photos Alloy Junction Oral History
before we see nano transistor with your dream sound.
Wait patiently if Papa be come back with schematic for Diyers
Greetings
Here's a photo of one just before it went off to CES.
I thought I bought enough VFETs from Acronman, but it seems I am a little short.... Well, I do not need 250 W, I need more time!
Acronman is a very reliable supplier IMHO.
I'm in the middle of matching 230 pair of K82 and J28, but of the
KE33 rank. I'm testing for Vgs at 20V Vds and 0.5 and 1 amp,
transconductance and Drain resistance.
It's very tedious.
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Common source or common drain
Mr Pass, I think I understood from the thread that the output stage is configured as a source follower.
One year ago I did some LTspice modelling with Mr. Rothacher's spice models, but with the output as common source. It seemed to work OK enough, but I never came to work out the details, not to speak about actually build something.
/RK
Mr Pass, I think I understood from the thread that the output stage is configured as a source follower.
One year ago I did some LTspice modelling with Mr. Rothacher's spice models, but with the output as common source. It seemed to work OK enough, but I never came to work out the details, not to speak about actually build something.
/RK
The Sony amplifiers at BAF 2013 were Common Source. The amps shown
at CES were Common Drain.
Thank you!
(I missed that there were some at the BAF2013!)
Interesting blog pages with links about SIT's V-Fet's with DIY schematics.
???? Oldman's Note: V-FET / VFET / SIT ?????
http://www.geocities.jp/mutsu562000/root/amps1/htm/hp005.htm
SONY 2SK60£¬NEC 2SK70£¬YAMAHA 2SK76£¬SONY 2SK82£¬YAMAHA 2SK98²»ÍêÕûʵ²â - ¡¾µ¨»úÖÆ×÷ÓëÐÀÉÍ¡¿ - ÒôÏìÖйúÂÛ̳¡ª¡ª×¨ÒµÒôÏì¼¼ÊõÉçÇø! - Powered by Discuz! & Audio-audio.Cn
Google translation can be used
Hope you enjoy it
???? Oldman's Note: V-FET / VFET / SIT ?????
http://www.geocities.jp/mutsu562000/root/amps1/htm/hp005.htm
SONY 2SK60£¬NEC 2SK70£¬YAMAHA 2SK76£¬SONY 2SK82£¬YAMAHA 2SK98²»ÍêÕûʵ²â - ¡¾µ¨»úÖÆ×÷ÓëÐÀÉÍ¡¿ - ÒôÏìÖйúÂÛ̳¡ª¡ª×¨ÒµÒôÏì¼¼ÊõÉçÇø! - Powered by Discuz! & Audio-audio.Cn
Google translation can be used
Hope you enjoy it
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