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B2
- Thread starter brinsmead
- Start date
David Litman
Active Member
That is a lot of stuff that could go wrong and probably even harder to service than the B-2.
and that is an understatement....
C-1 is exponentially more complex than a B-2, a B-1 or most any stand-alone amplifier I am aware of. There are some other equally complex preamps out there tho (a Technics' monster comes to mind).
To put things in perspective, I could fully restore half dozen B-2s during the time it takes me to restore a C-1...with equal attention to details, of course.
But superb built quality makes it's one of the most reliable Yamaha preamps I've owned.
This thing is pro quality built. All modular design, gold plated connectors, THE ONLY V-FET PREAMP ever made.
There are a few ancillary components that need to be replaced when the unit gets serviced....or in their way out they can take out a PSU rail and some v-fets. Nothing to do with Yamaha...these components age equally poorly on other equipment.
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It's alright. We'll make you pay for your mistake. Wink.
Thanks! Nice to read those again.
Yes indeed!
Asmodeus2112
Super Member
Dang, now I am worried about getting caught with my modules down.
clinic-audio
all on YAMAHA untill 1990
Do you have B2 modules down ?
Asmodeus2112
Super Member
No, sorry. Was a joke due to the advertisement on those magazine pages...
brinsmead
Active Member
thankyou theophile, very nice...I appreciate you guys
Time moves so quickly guys, I’ve had the B2 for 42 years now, and its still running like new, this Amp is the best Amp. I’ve ever owned, what beauty in every respect.
I'm getting fussy in my old age, our power company installed a new transformer in the street and our mains voltage has gone from 220vAC to way over 250vAC
Because of its age, I'm powering the B2 through the Yamabishi 10amp Variac, to keep the mains under control according to load, keeping it on a steady 220vAC output, just in case the higher mains AC voltage damages the Power Transformers.
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Time moves so quickly guys, I’ve had the B2 for 42 years now, and its still running like new, this Amp is the best Amp. I’ve ever owned, what beauty in every respect.
I'm getting fussy in my old age, our power company installed a new transformer in the street and our mains voltage has gone from 220vAC to way over 250vAC
Because of its age, I'm powering the B2 through the Yamabishi 10amp Variac, to keep the mains under control according to load, keeping it on a steady 220vAC output, just in case the higher mains AC voltage damages the Power Transformers.
.
one of the best of all times indeed!
I am glad you are enjoying that beauty for 40+ years and you are very much right about worrying about the upswing of those mains. The main supply bulk caps are rated at 63v and are operating already very close to their upper limits of their SOA. The higher supply voltage will accelerate their last days quickly.
Since the original bulk caps are already on borrowed time, I suggest you consider these as replacements:
https://www.partsconnexion.com/NICHICON-73642.html
you should be able to do away with the transformer after you install the 80v KGs.
BTW, I keep a B-2 fully original as frame of reference (replaced relays and cleaned selector board are the only maintenance items) Similar to yours, it is one of the first ones made.