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Yamaha B-2 restoration
- Thread starter US7IGN
- Start date
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- Tags
- yamaha b-2
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US7IGN
Active Member
Thank you! It was Peter Yamaha B2 - the "why" and the "how" of a comprehensive rebuild
You had one or more of the filter caps leak
No they are not copper. It is just one of the layers in the anodizing process.
Congrats! I am super happy to hear the success story of resurrecting another v-fet amp.
Silver ones are rare.
here is my silver Yamaha set:
Virtus
New Member
Even with a huge amount of money to spend, it’s practically impossible to find such models. A friend once told me that he saw a silver Yamaha C-1 for sale—in Kazakhstan, if I’m not mistaken. A couple of years ago, I saw a video ad for a silver Yamaha C-2 for sale in Germany, and a few months ago, one in Poland. I dream of someday getting my hands on a silver Yamaha preamp to go with my B-2.
P.S. Yello plays in many of your videos; it’s nice to know you’re a fan of these amazing guys!
US7IGN
Active Member
Thank you! This wouldn't have been possible without your products and advice.
To be honest, this isn't my first project involving V-FET amplifiers, but every time it's a huge stress and I have to double-check everything to make sure I don't lose them due to carelessness.
Next up is the black one.
It's a dream for many people.
I am going to speculate that only one of your driver boards is original to the B-2 you are working on. If you tell me your serial number of your unit, I can tell you which one.
The other driver board is a replacement form another unit.
US7IGN
Active Member
Thank you! The S/N is 10457. With the exception of those capacitors, everything else is completely identical.
The board with the brown film caps belongs to the unit.
The board with the orange film caps belongs to a much earlier unit. I replace the orange film caps on the spot. I once tested dozens of them (pulls) and thy have over 5% failure rate. Some shorted, some of drastically different values.
I never found any of the brown film caps, used in the later serial numbers (above 8k, IIRC) to have any issues.
The board with the orange film caps belongs to a much earlier unit. I replace the orange film caps on the spot. I once tested dozens of them (pulls) and thy have over 5% failure rate. Some shorted, some of drastically different values.
I never found any of the brown film caps, used in the later serial numbers (above 8k, IIRC) to have any issues.
