Ah, I have seen this pic before, just forgot. Nice!
YAMAHA B-3 on the way...to me!
- Thread starter Cosmin2000
- Start date
Cosmin2000
Active Member
Greetings! Long time since I have posted here. Since my last post, my B-3 worked flawlessly last winter in conjunction with a Luxman L-5 (which was fully reccaped) and Yamaha NS-1000M. I guess it was all about the "preamp" I was using (i.e. my laptop).
To give a good image a what a B-3 can do, I will say it sounds better than Accuphase P-260 with the same preamplifier and speakers. What a sound!
P.S.: Now I am considering whether to buy a second B-3 or a preamp like Yamaha C-2/ CX-1 for my current B-3.
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walnut color NS-1000Ms? were did you have those refinished? they look really good. Do you have more photos?
clinic-audio
all on YAMAHA untill 1990
Oilmaster is right , I will not use 39000µF in my B3
27000µF is the original value and that's what I will use
Here are B3 specifications for those who need to know
The 20k uf caps are also a different class than the u36uDoing that before the end of the year; have to eventually start the revamp of a B-3 of a socal AKer after it played for quite some time in my living room
Still have to sort out exactly which 63~65mm diameter power supply caps I am gonna use for that, as the Nippon Chemi-Con U36D are definitely banned for any future use following very dissapointing comparison test in a recent Sony TA-N7B rebuilt.
That test also proofed that increasing the values is causing horrible dominant lows, and that 20,000uF caps (down from 22,000uF) provided much better staging, detail and tight bass than caps uprated 27,000uF.
I will not quickly return to increasing PSU cap values !
As such, I may do simular tests in the B-3, but it such a pain to open that thing up and assemble it again that I may refrain from it.
You've provided capacitance values alone (and a subjective review of unknown parts in a completely different amp), but no mention of ripple current values, exact make/model/dimensions or usage/age of the caps being compared?
Useful information.
You've provided capacitance values alone (and a subjective review of unknown parts in a completely different amp), but no mention of ripple current values, exact make/model/dimensions or usage/age of the caps being compared?
Useful information.
Maybe the answer was meant to be referring to the metadata rather than provide specific model number...
Imagine you went and bought that part and for one reason or another, you're finding that it does not meet your expectations...
I don't think I would be too far off thinking this might be a reason why you didn't see a specific model number
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clinic-audio
all on YAMAHA untill 1990
A buddy with B3 in France ?
clinic-audio
all on YAMAHA untill 1990
May not be ideal (in general) which is why I asked what you were comparing to, I've saved a bunch of ripple current data for various caps in this particular application (63mm diameter for B-3). European / US brand filter caps (Kemet / BHC / Rifa and even CDE) have far greater ripple values than Japanese (including U36D) for a given size / capacitance. I wouldn't have used the U36D personally, based on the spec sheet.
I think these sonic deficit scenarios are often a function of lower ripple values (obviously higher ESR too), in my experience the aforementioned European brands work better as filter caps in most amps I've tested them in now. Having great results with the new Kemet lineup so far (ALS30 / ALS40 and even ALS70).
In no way am I condoning huge capacitance values as that link in Hifido earlier - my point is that your subjective sonic deficit is likely a result of using an entirely different capacitor. To usefully compare sonic results of capacitance alone, you'd have to compare to the same brand/model/age while holding all other specs equal.
Cosmin2000
Active Member
Regarding a proper preamp to drive the Yamaha B-3. Which one of these models would you recommend or had any previous experiences with?
1. Yamaha CX-1, 100V version, has remote controlled volume
2. Yamaha C-2, classical Yamaha preamp from the same era of B-3, usually the preamp of the Yamaha B-2
3. Luxman 5C50, 100V version, this is from Laboratory Reference series, has some funky ICs
4. Luxman C-1010, also 100V version
5. Sansui BA-F1, companion preamp of the BA-F1 power amp
6. Sansui CA-2000, companion preamp of the BA-2000 power amp
Any other suggestions are highly appreciated!
1. Yamaha CX-1, 100V version, has remote controlled volume
2. Yamaha C-2, classical Yamaha preamp from the same era of B-3, usually the preamp of the Yamaha B-2
3. Luxman 5C50, 100V version, this is from Laboratory Reference series, has some funky ICs
4. Luxman C-1010, also 100V version
5. Sansui BA-F1, companion preamp of the BA-F1 power amp
6. Sansui CA-2000, companion preamp of the BA-2000 power amp
Any other suggestions are highly appreciated!
Cosmin2000
Active Member
clinic-audio
all on YAMAHA untill 1990
Yes !
these pictures are coming from B2 power output heatsinks .
2SJ26A and 2SK76A are power VFET power transistors for B2 and B3 only !
these pictures are coming from B2 power output heatsinks .
2SJ26A and 2SK76A are power VFET power transistors for B2 and B3 only !
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Cosmin2000
Active Member
clinic-audio, Vint Age, thanks for the comments! This B-2 is not mine. Wish to make it mine though. Talked with the seller and he promises to be in very good working order. The price is actually a bit smaller than a B-3 that I am also watching for some time...
Cosmin2000
Active Member
Greetings to all! I put aside the B-2 from the above pics although the price was very tempting and the condition appeared to be also good. Moreover, I have searched and found a couple of preamps with, presumably, a good matching with my current Yamaha B-3. I have found numerous preamps from Yamaha like CX-1, CX-2, C-2 on 220V-240V or 100V, Sansui CA-2000 or CA-F1, Luxman 5C50 or C-1010 (both on 100V), an interesting Adcom GTP-750 (with remote control)...
I let all of these go for...you guessed it another YAMAHA B-3. Is on the way to me as I type this message.
The seller promised is fully functional and I quote "90% as new machine". This time I had to pay a little more than the previous B-3.
Can't wait to listen to this one alongside the previous and NS-1000Ms in BTL mode.
By the way, any thoughts on the qualities of B-3 in BTL mode? Does it sound better than in stereo mode?
I attach some picture with this beauty.
I let all of these go for...you guessed it another YAMAHA B-3. Is on the way to me as I type this message.
The seller promised is fully functional and I quote "90% as new machine"
. This time I had to pay a little more than the previous B-3.Can't wait to listen to this one alongside the previous and NS-1000Ms in BTL mode.
By the way, any thoughts on the qualities of B-3 in BTL mode? Does it sound better than in stereo mode?
I attach some picture with this beauty.
Cosmin2000
Active Member
My B-3 has finally arrived, serial no. 03767 (I wonder how many are in total... ).
The Chinese seller was right, it is one of the best conservated pieces of audio gear I have seen. Spotless, no dust inside or outside, I felt like I was going back in time in 1978. Only from the aesthetics point of view, comparing this one with my previous B-3 does not make any sense. The inside is all original with the Yamaha 2SK76A and 2SJ26A V-FETs, although I have noticed that the 2SJ76A do not have the "C" inscription. The previous B-3 had all the V-FETs inscripted with a small "C". Any arguments to explain this?
Pictures do not make any justice on how great this B-3 looks... Pics soon.
The Chinese seller was right, it is one of the best conservated pieces of audio gear I have seen. Spotless, no dust inside or outside, I felt like I was going back in time in 1978. Only from the aesthetics point of view, comparing this one with my previous B-3 does not make any sense. The inside is all original with the Yamaha 2SK76A and 2SJ26A V-FETs, although I have noticed that the 2SJ76A do not have the "C" inscription. The previous B-3 had all the V-FETs inscripted with a small "C". Any arguments to explain this?
Pictures do not make any justice on how great this B-3 looks... Pics soon.
clinic-audio
all on YAMAHA untill 1990
In all B3 I have refixed , I got this :
