YAMAHA B-3 on the way...to me!

Discussion in 'Yamaha' started by Cosmin2000, Oct 16, 2017.

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  1. Cosmin2000

    Cosmin2000 Active Member

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    I've been looking for a long time to buy one of these. I had postponed the purchase moment a year or so due to other problems, mainly because I was not able to find a decent, clean B-3 on the Chinese internal market. Finally, I spotted a good candidate and made the move. My wife encouraged and supported me all the way, she even got involved in this acquisition using some Chinese friends. Long story short, the last SIT amplifier, with the price tag same as B-2 (200000 yen), having the famous V-FETs from Yamaha, is on the way to me.
    I will probably get it on Friday or Saturday.
    The Chinese seller had some crazy expensive gear and send me many small 10 seconds movies with the B-3 in action driving some huge JBL 4344 speakers.

    http://hifido.co.jp/KW/G2/P0/A1/E/220-10/S0/C17-12621-66594-00/

    Hope I made a good move quality wise with the B-3, with which I intend to drive the NS-1000M speakers.
    Keep you posted with pics asap!
     
    Last edited: Oct 17, 2017
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  2. Cosmin2000

    Cosmin2000 Active Member

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  3. zaibatsu

    zaibatsu Active Member

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    Super cool!

    Congratulations, I know you'd been searching for a while. Good to see one came through.
     
  4. Oilmaster

    Oilmaster Ozzy Subscriber

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    I have one playing in my living room, unrestored, almost daily for a few hours (TV + music) for the last 6 months
    In the beginning it sounded actually rather dull (poor staging/transparency/dynamic), but after a few months the amp became really good (tightening the basses, staging, clearness).
    Really surprising how long it took, perhaps a matter of very long reforming process of the very large power supply capacitors, who can tell.
    So.... be warned that you may actually be a bit disappointed in the beginning.

    Although it is a refined circuitry of the B-2, it has half of the B-2's VFETs (only two per channel), and it has a sound signature of its own.
    Over time, I may prefer the B-3 sound over the B-2, but I should complete a full rebuild of both models to really A-B them.
    The B-3 is designed for BTL mode, hence as monoblocks, making a full 4 VFETs per channel, and half of the THD (according the manual)
    The very reason why I got 3 of them :)
     
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  5. Vint Age

    Vint Age B-1 With Yamaha

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    Very nice indeed! :thumbsup:
     
  6. SoCal Sam

    SoCal Sam Lunatic Member

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    VFET's and Beryllium!
     
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  7. Saint Johnny

    Saint Johnny Bon Ton Roule Subscriber

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    Was the B-3 ever sold commercially anywhere outside of Japan? Perhaps as a 'special order only' option, to dealers, etc.?

    (Funny though whenever I think 'B-3', I just mentally finish with 'Hammond'. LOL)
     
  8. Cosmin2000

    Cosmin2000 Active Member

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    Thanks, zaibatsu! This B-3 promises to be from an audio pasionate, just like all of us. He was selling also the following: Yamaha B-2, Yamaha C2, Yamaha C-2X, Yamaha B-4 (the Japanese version of the M-4), NS-1000M, NS-1000X, GT-2000 high-end record player, and ultimate pro model PC-5002. I just counted the Yamahas, not to mention other beauties like Sansui AU-111 tube amp, Sansui BA/CA-3000, Diatone DS-505 and Diatone DS-3000 speakers. Quite a good audio collection.

    As far as this B-3, I'm very enthusiastic and curious about the sound signature.
     
  9. Cosmin2000

    Cosmin2000 Active Member

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    Oilmaster, I only knew that you have one B-3. Now you tell me you have three of them, so probably you are the "B-3 master" here on AK.
    May I know what kind of 230-100V transformer you are using for the B-3s?
     
    Last edited: Oct 16, 2017
  10. rottalpha

    rottalpha Yamaholic

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    sweet, let's hope it makes it to you just as described.
    Will you take possession of it in China or in Romania?
     
  11. Mark B

    Mark B Yamaha Fan Subscriber

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    Congratulations Cosmin! I'm curious, how are you going to run a pair of NS-1000M's with a single B-3?
     
  12. rottalpha

    rottalpha Yamaholic

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    B3 is a stereo amplifier that unlike its older brothers, it can be bridged.
     
  13. Cosmin2000

    Cosmin2000 Active Member

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    Greetings, rottalpha! Actually, the discussion with you via PMs intrigued me to buy this model. The B-3 will come in my possession in China. The NS-1000Ms are in Romania, so I will have the chance to really see what sound will come from B-3 close to Christmas.

    Thanks, Mark! rottalpha is right in the previous post (please see the picture below). B-3 _4.jpg
     
  14. Cosmin2000

    Cosmin2000 Active Member

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    You can't go wrong with VFET's and Beryllium domes. They seem to be a perfect match invented by Yamaha back in the day...
     
    Last edited: Oct 17, 2017
  15. SoCal Sam

    SoCal Sam Lunatic Member

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    Yes, Yamaha was a true innovator. There is an B-2 advertisement showing a pairing with the NS-1000M. Too bad VFET's were too expensive and too fragile to be adapted by the market. IMO, they represented and advance over standard output transistors.
     
  16. Cosmin2000

    Cosmin2000 Active Member

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    I found a rare advertisement from 1981 about the B-3 (of course in Japanese). I also have the brochure in Japanese, but I cannot upload to AK because is too big.
    B-3 add.jpg
    B-3_#.jpg
    B3-drawing-01.JPG
    B3-drawing-02.JPG
     
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  17. Mark B

    Mark B Yamaha Fan Subscriber

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    Thanks RA, I would of known that if I'd paid attention.
     
  18. rottalpha

    rottalpha Yamaholic

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    to be fair, it does look a lot like the BX-1..only smaller

    as a side note, each BX-1 monoblock is a bridged 50w x2 stereo amp....inside.
     
  19. rottalpha

    rottalpha Yamaholic

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    It is conforting knowing that the long journey from China to Romania, would be under your control.
     
  20. Vint Age

    Vint Age B-1 With Yamaha

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    By any chance does anybody have the full blown schematic for this beauty that they'd be willing to share? :)
     

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