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b-2

  1. david winter

    Yamaha B-2 - Unstable bias and very tight adjustment range

    Hi, I'm trying to figure out what can cause the -85V supply to drop to -60V when the bias increases up to around 40mV. With no bias, I get the +85V and -85V voltages correct. Adjusting the bias on either channel makes the -85V drop down to -60V. I checked the transistors on the negative rail...
  2. M

    B-2 goes into protection mode some minute after startup only.

    Lately my B-2 will always go into protection mode after a couple of minutes into startup and lasting for a couple of seconds. Then it goes on without issues for hours. When entering protection mode there is a horrible static and noise through the speakers. Calling all the experts, what can this...
  3. Nashou66

    B-2 basket case incoming , Rott, might need some parts ;)

    Saw this on the big bad bay site and threw out an offer and it got accepted. :D Seller stated in add that sound was there when fiddling with volume pots . So I am hoping this not complete B-2 will work sonically at least . It has a make shift perforated metal case that might be ok till a...
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