Yamaha B1

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Yamaha B1

Posted by Lew (A) on November 28, 2016 at 21:15:47

In Reply to: RE: Looking at Yamaho amps posted by bobwire on November 27, 2016 at 18:39:48:

I think the B1 amplifier was their best. And most who have heard it say it sounded excellent. Problem is/was that it uses a now unobtainium power transistor, called a "VFET". There are modern descendents of the VFET, but I don't think they can be retro-fitted. If the outputs blow, the amplifier may become a doorstop. (On the other hand, I think I read recently that Nelson Pass has a gaggle of VFETs.)

For that reason, if you buy a working B1 that has not been serviced in recent years, probably you should first of all replace the electrolytic capacitors. Lytics have a finite life span and when failing can take out those irreplaceable output transistors.

This post is made possible by the generous support of people like you and our sponsors:

Follow Ups Full Thread

Topic - Looking at Yamaho amps - bobwire 10:31:29 11/26/16 (13)

Never like Yamaho or Yanaha but Yamaha is OK - Awe-d-o-file 14:28:10 11/30/16 (3)

How about Yamy? - 4everyoung 17:41:16 11/30/16 (2)

I like YoMaMa brand better. Ask: "What is that Hellish screeching?" "YoMaMa". nt - Smelly_Socks 13:05:35 12/12/16 (0)

From what you've said maybe you should call it... - musetap 17:57:14 12/04/16 (0)

RE: Looking at Yamaha amps - bobwire 21:29:16 11/29/16 (0)

I just bought a vintage Yanaha amp and wouldn't change a thing - 4everyoung 15:03:05 11/28/16 (3)

If those are the original electrolytic capacitors, you might want to change one thing - Lew 10:30:55 11/29/16 (2)

Yamaha CA-1010 uses bipolar transistors (nt) - 4everyoung 13:48:37 11/29/16 (1)

Nevertheless,... - Lew 20:50:15 11/29/16 (0)

RE: Looking at Yamaho amps - bobwire 18:39:48 11/27/16 (3)

Yamaha B1 - Lew 21:15:47 11/28/16 (2)

RE: Yamaha B1 - djk 16:02:05 11/29/16 (1)

Thanks for the correction - Lew 20:49:18 11/29/16 (0)

Follow Ups

Yamaha B1 - Lew 21:15:47 11/28/16 (2)

RE: Yamaha B1 - djk 16:02:05 11/29/16 (1)

Thanks for the correction - Lew 20:49:18 11/29/16 (0)

Post a Message!